CN204089545U - Ultra-low speed big torsional moment motor and adopt the crane of this motor - Google Patents

Abstract

The utility model discloses a kind of ultra-low speed big torsional moment motor and adopt the crane of this motor, described motor comprises external rotor and stator, described stator is provided with the stator temperature transducer for gathering temperature signal in stator, some permanent magnets are installed with inside the urceolus of described external rotor, described some permanent magnet adopts identical watt shape hexahedron structure and circumferentially regularly arranged with axial both direction, arbitrary circumference and arbitrary described permanent magnet quantity axially arranged are multiple, two peripheral side of described permanent magnet are the tapered plane shape of inner side top rake shape, its top rake angle is 5-35 degree, described crane adopts above-mentioned motor, the reel of lifting mechanism is used as with the urceolus of motor.The utility model normally can run under low speed (Ultra-Low Speed) high pulling torque, and stable, and vibrate little, noise is little, and temperature rise is low, mainly can be used for crane, port machine, the mechanical, electrical ladder of tower, hoist engine and other similar applications.

Description

Ultra-low speed big torsional moment motor and adopt the crane of this motor

Technical field

The utility model relates to a kind of ultra-low speed big torsional moment motor, also relates to a kind of high pulling torque crane directly urceolus of this motor being used as reel.

Background technology

Existing motor comprises rotor and stator, usually adopts stator at external rotor in interior structure, also have part motor be rotor outside and stator interior, this motor is called as external rotor electric machine.The stator core of external rotor electric machine is arranged on fixing central shaft, iron core is embedded with winding, rotor is tubular, be positioned at the outside of stator, the two ends of rotor urceolus are provided with fixed disk, and fixed disk is connected by bearing with central shaft, produce rotating magnetic field after winding energising, act on mutually with the permanent magnet be arranged in rotor inner wall, drive rotor to rotate.Existing this motor operational excellence when speed is higher, but when needs low speed (comprising Ultra-Low Speed) runs, the negative effect such as harmonic torque and cogging torque just becomes clearly, temperature rises, vibration and noise strengthen,, even may there is irreversible demagnetization phenomenon in output drop, these defects seriously hinder external rotor electric machine application under the low speed.

Because existing motor can not run under low-speed big, when driving reel for crane, need to arrange huge gear box and slow down, not only volume is large, complex structure, production cost and maintenance cost high, but also bring unnecessary power consumption.

Summary of the invention

The purpose of this utility model is to provide a kind of ultra-low speed big torsional moment motor, and it normally can run under low speed (Ultra-Low Speed) high pulling torque, and stable, and vibrate little, noise is little, and temperature rise is low.

Another object of the present utility model is to provide a kind of crane adopting above-mentioned ultra-low speed big torsional moment motor, its lifting mechanism does not need to arrange gear box, and volume is little, production cost and maintenance cost low, easy to use, normally can run under low speed (Ultra-Low Speed) high pulling torque.

The technical scheme that the utility model adopts is:

A kind of ultra-low speed big torsional moment motor, comprise external rotor and stator, described stator comprises central shaft, the stator winding being fixedly mounted on the stator core on described central shaft and being fixedly mounted in described stator core, described stator is provided with the stator temperature transducer for gathering temperature signal in described stator, described external rotor comprises urceolus, the inner side of described urceolus is installed with some permanent magnets, the two ends of described urceolus are all installed with corresponding fixed disk and are connected with described central shaft bearing by corresponding fixed disk, described some permanent magnet adopts identical watt shape hexahedron structure and circumferentially regularly arranged with axial both direction, arbitrary circumference and arbitrary described permanent magnet quantity axially arranged are multiple, two peripheral side of described permanent magnet are the tapered plane shape of inner side top rake shape, its top rake angle is 5-35 degree, the right-hand member of described central shaft extends out in connected respective end bearing, be fixedly mounted on right rigid mount, described right rigid mount is provided with axle installing hole, the right part of described central shaft insert described right rigid mount axle installing hole and and be provided with for preventing both anti-rotation structures in relative rotation between described right rigid mount, the described fixed disk of right-hand member forms the brake disc of disk brake, its diameter is greater than the diameter of described urceolus, extend out from edge's radial direction of described urceolus, the jaw type brake block of the brake tongs device of described disk brake is positioned at the both sides at the outward flange position that this fixed disk extends out from edge's radial direction of described urceolus.

Preferably, described stator core is provided with the stator slot for winding described in setting-in, described stator slot is peariform slot, and notch size k is between 2.5-4.5mm, and the pitch of described winding is 1, every circle coil winding is on a stator tooth, and adopting the pole slot fit mode of 8 pole 9 grooves, 10 pole 12 grooves, 20 pole 24 grooves, 30 pole 36 grooves, 22 pole 24 grooves, 16 pole 18 grooves or 32 pole 36 grooves, described permanent magnet adopts NdFeB material, and length is 30-95mm, thickness is 8-18mm, and pole embrace is 0.8-0.9.

Preferably, described permanent magnet cross section outward flange is diametrically the circular arc line that the center of circle is positioned in described center shaft axis, and described permanent magnet cross section inward flange diametrically adopts any one version following:

(1) described inward flange is single circular arc, and the center of circle is positioned in described center shaft axis;

(2) described inward flange is single circular arc, and the center of circle is positioned on described permanent magnet cross section outward flange mid point and the determined straight line of described center shaft axis, and its radius equals described outer peripheral radius;

(3) described inward flange is single circular arc, and the center of circle is positioned in described center shaft axis, and the circumferential side of permanent magnet cross section inward flange diametrically and permanent magnet cross section is connected by a little concave arc line;

(4) described inward flange is single circular arc, the center of circle is positioned on described permanent magnet cross section outward flange mid point and the determined straight line of described center shaft axis, and its radius equals described outer peripheral radius, the circumferential side of permanent magnet cross section inward flange diametrically and permanent magnet cross section is connected by a little concave arc line.

Preferably, described some permanent magnets regular distribution mode in the circumferential and axially, for circumferentially aliging in the circumferential and being uniformly distributed, is linearly alignd in the axial direction and is uniformly distributed.

Preferably, following any one or multiple interior cooling structure is provided with:

(1) described central shaft is quill shaft, heat dissipation wind channel in the axle that the axis hole of described central shaft is configured for interior cooling;

(2) annulus forming the outer heat dissipation wind channel of stator is provided with between the lateral surface of described stator core and the medial surface of described external rotor;

(3) be provided with the axially extending bore forming heat dissipation wind channel in stator in described stator core, the axially extending bore in described stator core is formed by connecting by forming the corresponding heat dissipation wind channel hole that the stator punching of described stator core is gone out,

The draft type of above-mentioned each heat dissipation wind channel is natural draft and/or forced ventilation.

Preferably, any one forced ventilation structure following is adopted:

(1) when described central shaft is quill shaft, the axis hole of described central shaft outlet air end is uncovered, induced draft fans in axle is provided with in the axis hole of described central shaft outlet air end, when being also provided with heat dissipation wind channel in the outer heat dissipation wind channel of stator and/or stator, the two ends of described stator core respectively and leave the gap forming the even gap band of calming the anger in end between the described fixed disk of respective end, in the outer heat dissipation wind channel of described stator and/or stator the two ends of heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end be communicated with, the sidewall of described central shaft outlet air end is provided with the central shaft side opening of the even gap band of calming the anger in described end of axis hole and the respective end being communicated with described central shaft, in described axle, induced draft fans is positioned at the outside of this central shaft side opening,

(2) when being provided with heat dissipation wind channel in the outer heat dissipation wind channel of stator and/or stator, the two ends of described stator core respectively and leave the gap forming the even gap band of calming the anger in end between the described fixed disk of respective end, in the outer heat dissipation wind channel of described stator and/or stator the two ends of heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end be communicated with, the fixed disk of described air intake is provided with wind inlet channel, the quantity of described wind inlet channel is one or more, air intake air pump is serially connected with in described wind inlet channel, the described wind inlet channel being positioned at described air intake air pump two ends is equipped with air intake unidirectional valve, described air intake air pump comprises cylinder body, described cylinder body is axially disposed within corresponding described fixed disk, the piston supporting with it is provided with in described cylinder body, described piston is connected with the piston rod extended to inside described fixed disk, cavity in described cylinder body is divided into rod chamber and rodless cavity by described piston, described rod chamber is positioned at the inner side of described rodless cavity, described central shaft is provided with the even gap band and form the multi-level cam of cam mechanism with described piston rod of calming the anger in the described end being positioned at respective end, described multi-level cam promotes described piston rod when rotating and moves back and forth, the air inlet of described air intake air pump and gas outlet are all arranged on the bottom of described rodless cavity, when being also provided with heat dissipation wind channel in axle, the sidewall of described central shaft air intake is provided with the central shaft side opening of the even gap band of calming the anger in described end of axis hole and the respective end being communicated with described central shaft.

Preferably, the left end of described urceolus is connected with encoder, the connected mode between the left end of described urceolus and described encoder be following any one:

(1) described encoder is external rotor coder, comprise the inner sleeve and overcoat that are mutually rotatably connected, the left end of described central shaft extends out in connected respective end bearing, be fixedly mounted on left rigid mount, described left rigid mount is provided with axle installing hole, in the axle installing hole that the left end of described central shaft inserts described left rigid mount and and be provided with for preventing both anti-rotation structures in relative rotation between described left rigid mount, described inner sleeve is fixedly connected with the left end of described central shaft, described overcoat is fixedly connected with the described fixed disk of left end, described central shaft, urceolus, inner sleeve and overcoat coaxial,

(2) described encoder is internal rotor encoder, comprise the inner sleeve and overcoat that are mutually rotatably connected, described encoder is furnished with connection multidiameter and bearing spider, described connection multidiameter is arranged on described bearing spider by outer bearing, the right-hand member of described connection multidiameter is provided with radial flange, described radial flange is coaxially fastened on the described fixed disk of left end, the inner sleeve of described encoder is fixedly sleeved coaxially to be connected with the left end of multidiameter with described connection with the left part of multidiameter or by shaft coupling in described connection, the overcoat of coded device is fixedly connected with described bearing spider by connector, described outer bearing adopts double-row self-aligning bearing.

Preferably, described rigid mount adopt following any one:

(1) the axle installing hole on described rigid mount is polygonal hole, the shaft part of the described central shaft of connected respective end is identical polygon, the shaft part interference fit of described axle installing hole and insertion described central shaft wherein or interference fits, corresponding polygonized structure constitutes described anti-rotation structure, in the main body that described axle installing hole is set directly at described rigid mount or be arranged in adjusting sleeve, for situation about being arranged in described adjusting sleeve, the outer rim of described adjusting sleeve is cylindrical, described axle installing hole is arranged on the central authorities of described adjusting sleeve, the main body of described rigid mount is provided with the adjusting sleeve installing hole corresponding with described adjusting sleeve outer rim, described adjusting sleeve is plugged on described adjusting sleeve installing hole, with described adjusting sleeve installing hole interference fits or interference fit, and be provided with or be not provided with fastening bolt,

(2) the axle installing hole on described rigid mount is cylindrical hole, the shaft part of the described central shaft of respective end is cylindric, described rigid mount is provided with some pin via holes penetrating described axle installing hole sidewall, the corresponding shaft part of described central shaft is provided with some pin blind holes of docking with described some pin via holes respectively, some pins or bearing pin wedge pin via hole and the pin blind hole of described mutual docking respectively, and described pin or bearing pin and supporting structure thereof constitute described anti-rotation structure;

(3) the axle installing hole on described rigid mount is cylindrical hole, the shaft part of the described central shaft of respective end is cylindric, multiple key is provided with between described axle installing hole and the described central shaft shaft part inserting in described axle installing hole, described key and supporting structure thereof constitute described anti-rotation structure, in the main body that described axle installing hole is set directly at described rigid mount or be arranged in adjusting sleeve, for situation about being arranged in described adjusting sleeve, the outer rim of described adjusting sleeve is cylindrical, described axle installing hole is arranged on the central authorities of described adjusting sleeve, the main body of described rigid mount is provided with the adjusting sleeve installing hole corresponding with described adjusting sleeve outer rim, described adjusting sleeve is plugged on described adjusting sleeve installing hole, with described adjusting sleeve installing hole interference fits or interference fit, and be provided with or be not provided with fastening bolt,

(4) the axle installing hole on described rigid mount is cydariform hole, the shaft part of the described central shaft of connected respective end is identical cydariform, the shaft part interference fit of described axle installing hole and insertion described central shaft wherein or interference fits, corresponding drum organization constitutes described anti-rotation structure, in the main body that described axle installing hole is set directly at described rigid mount or be arranged in adjusting sleeve, for situation about being arranged in described adjusting sleeve, the outer rim of described adjusting sleeve is cylindrical, described axle installing hole is arranged on the central authorities of described adjusting sleeve, the main body of described rigid mount is provided with the adjusting sleeve installing hole corresponding with described adjusting sleeve outer rim, described adjusting sleeve is plugged on described adjusting sleeve installing hole, with described adjusting sleeve installing hole interference fits or interference fit, and be provided with or be not provided with fastening bolt,

(5) the axle installing hole on described rigid mount is splined hole, and the described central shaft shaft part of connected respective end is splined shaft, and the above-mentioned spline structure adopted between the two constitutes described anti-rotation structure.

Preferably; the real time temperature in stator is gathered by described stator temperature transducer; the fatigue state of motor is judged according to the real time temperature in the described stator collected; set the working temperature higher limit corresponding with the temperature acquisition position of described stator temperature transducer; when the temperature that corresponding stator temperature transducer collects meets or exceeds corresponding working temperature higher limit; be judged as that motor is tired also to judge according to this to control to shut down; when collected temperature is lower than corresponding working temperature higher limit, is judged as that motor is tired and allows motor to carry out work.

Preferably, be provided with the current signal collection device for obtaining current of electric online and/or the voltage signal acquisition device for obtaining electric moter voltage online, described current signal collection device is the current sensor of current input signal for gathering stator winding and/or the frequency converter for exporting its current output signal, described voltage signal acquisition device is the voltage sensor of voltage input signal for gathering stator winding and/or the frequency converter for exporting its voltage output signal, current signal is obtained by current signal collection device, with described current signal for load transducing signal or calculated by described current signal and obtain payload data, voltage signal is obtained by described voltage signal acquisition device, the transducing signal being rotary speed with described voltage signal or calculated by described voltage signal and obtain rotary speed data.

A kind of crane, comprise the utility model any one ultra-low speed big torsional moment motor disclosed, the urceolus of described ultra-low speed big torsional moment motor is used as the reel of the lifting mechanism of described crane, for connecting and the steel wire rope of the described lifting mechanism that reels.

The additional technical feature of claim 2-9 of the present utility model, both can individualism as independently optimisation technique means separately, also can combination in any existence mutually.

The beneficial effects of the utility model: owing to adopting external rotor structure, are conducive to high pulling torque and export, owing to being provided with stator temperature transducer, the true temperature of stator interior can be obtained, this temperature is for the outer surface of motor temperature adopted under prior art or support temperature, the degree of fatigue of motor or temperature rise can be embodied more accurately on the impact of motor, because the affect main manifestations of temperature rise on motor is stator core different qualities at different temperatures, and can whether stator core reaches uniform temperature limit value be the motor major influence factors that work on and necessary qualifications, and outer surface of motor temperature is different from stator interior temperature, between the two also and the linear relationship of non-critical, therefore in the stator gathered by stator temperature transducer, temperature can be more accurate, judge the fatigue state of motor more in time, the inaccurate erroneous judgement caused of Yin Wendu is avoided to fail to judge, both effectively and reliably ensure that motor operates in reasonable or safe temperature range, avoid again not reaching shutdown limit value at stator temperature and shutting down the waste caused, also avoid simultaneously and send a telegraph the too high infringement brought to motor of machine stator temperature rise because user ignores machine operation guidance, export in view of the utility model motor is adapted to high pulling torque, such as when lifting mechanism for gantry crane, during work, the Interaction Force square of rotor and stator can reach more than 200kNm, adopt the axle head of prior art that fixed form is installed to be easy to occur fixing problem incessantly, owing to being provided with for preventing central shaft and bearing anti-rotation structure in relative rotation between central shaft right-hand member and right rigid mount, the stability that the motor that effectively ensures to know clearly is installed, avoids central shaft under existing mounting technique and is easy to the phenomenon rotated of skidding, due to the right-hand member of central shaft is fixedly mounted on rigid support, and the diameter of the fixed disk of right-hand member is become large, form the radial edge extended out, coordinate with the brake block of disk brake the brake formed motor with this edge, braking moment is large, good braking effect, in braking procedure, stability is strong, vibrate little, little to equipment damage, and structure is simple, compact, does not substantially additionally take up room because of the setting of brake apparatus, be adapted to job requirement and the use occasion of crane hoisting mechanism especially, owing to being provided with heat dissipation wind channel at motor internal, and can be undertaken air-cooled by force ventilated mode, be conducive to increasing substantially heat-sinking capability, control temperature rise, particularly due to automatic tire pump can be adopted to ventilate, the air pump auto-action when rotor turns, when rotor stops, air pump also stops action, not only facilitate operation, but also without the need to accessing power supply separately, owing to being provided with encoder, and external rotor coder and internal rotor encoder all can use, adequately provide condition by encoder collection rotor turns and position signalling, the power supply performance being conducive to controlling frequency converter is consistent with actual needs, improves running quality, owing to being provided with current sensor and voltage sensor, and obtain load signal by current signal, obtain tach signal by voltage signal, greatly reduce the difficulty that corresponding data gathers thus, simplify control appliance control procedure, form external rotor magnetic field owing to have employed some permanent magnets regularly arranged on circumferential and axial, be conducive to the optimization realizing magnetic field structure, owing to circumference have employed multiple permanent magnet, and two of permanent magnet peripheral side are the tapered plane shape of the inner side top rake shape of 5-35 degree, significantly reduce the aberration rate of field waveform, owing to axially adopting multiple permanent magnet, be conducive to the length reducing permanent magnet, eliminate or inhibit the impact of high order harmonic component significantly, according to the experiment of applicant, relative to the conventional design under prior art, the above-mentioned permanent magnet that relates to of the utility model is relied on to optimize structure with Optimal Parameters and act synergistically with other optimization technique means of the present utility model, the aberration rate of air-gap field waveform can reduce by 50%-85%, air-gap field irregularity of wave form can be controlled below 15% or 10%, the aberration rate of back emf waveform controls below 10% or 8%, increase substantially the running stability of motor thus, reduce noise, reduce torque pulsation and contribute to increasing torque and export, reduce heat, be specially adapted to crane hoisting mechanism and other similar applications that reel directly drives (using motor urceolus as lifting mechanism reel).

Under above-mentioned preferred implementation of the present utility model, motor speed can be low to moderate 0.001r/min-30r/min, and torque density can up to 80kNm/m ³above, momentary overload capacity doubly can transship up to 1.5-2.0.

Accompanying drawing explanation

Fig. 1 is the general structure schematic diagram of the utility model ultra-low speed big torsional moment motor;

Fig. 2 (a), 2(b) and 2(c) be respectively the schematic diagram of the three kinds of embodiments that the present invention relates to permanent magnet shape of cross section;

Fig. 3 is the axial schematic diagram of an embodiment of the utility model permanent magnet mounting structure;

Fig. 4 is the axial schematic diagram of another embodiment of the utility model permanent magnet mounting structure;

Fig. 5 is the structural representation of a kind of hollow shaft of the utility model;

Fig. 6 is the cross section structure schematic diagram that the utility model relates to some heat dissipation wind channels;

Fig. 7 is the schematic diagram of a kind of cooling structure of the utility model;

Fig. 8 is the schematic diagram of the another kind of cooling structure of the utility model;

Fig. 9 is the schematic diagram of the third cooling structure of the utility model;

Figure 10 the utility model relates to the structural representation of external rotor coder;

Figure 11 is the structural representation that the utility model relates to internal rotor encoder;

Figure 12 is the schematic diagram of a kind of rigid mount of the utility model;

Figure 13 is the schematic diagram of the another kind of rigid mount of the utility model;

Figure 14 is the schematic diagram of the third rigid mount of the utility model;

Figure 15 is the schematic diagram of the utility model the 4th kind of rigid mount;

Figure 16 is the schematic diagram of the utility model the 5th kind of rigid mount;

Figure 17 is the schematic diagram of the utility model the 6th kind of rigid mount;

Figure 18 is the relation curve of the electric current that relates to of the utility model and lifting loads, the occupation mode of motor is the lifting mechanism for crane, the rotor urceolus of motor as the cable drum of crane rope reel system, direct Wound steel rope, load is the lift heavy of crane;

Figure 19 is the relation curve of the voltage that relates to of the utility model and the speed of service, and the occupation mode of motor is the lifting mechanism for crane, the rotor urceolus of motor as the cable drum of crane rope reel system, direct Wound steel rope;

Figure 20 is the structural representation relating to lifting mechanism in the utility model crane.

Embodiment

See Fig. 1-17, the utility model discloses a kind of ultra-low speed big torsional moment motor, be preferably permagnetic synchronous motor, be generally three-phase permanent magnet synchronous motor, also can be single-phase permanent-magnet synchronous motor, comprise this kind of motor itself under ordinary meaning, the electric device of other embody rule functions additional on the basis being also included within this electric machine structure and operation principle.

Ultra-low speed big torsional moment motor disclosed in the utility model comprises external rotor and is positioned at the stator (see Fig. 1) of described external rotor, described stator is primarily of stator core 1, stator winding and central shaft 2 are formed, described central shaft can be solid shafting or hollow shaft, described stator core fixed installation on center shaft, described stator core is provided with stator slot, stator winding is fixedly inlaid on described stator slot, described external rotor comprises the urceolus 3 of tubular, the two ends of described urceolus are fixedly connected with fixed disk 4, described fixed disk is rotatably connected with described central shaft by rotor bearing 5.The described fixed disk of right-hand member forms the brake disc of disk brake, its diameter is greater than the diameter of described urceolus, extend out from edge's radial direction of described urceolus, the jaw type brake block of the brake tongs device of described disk brake is positioned at the both sides at the outward flange position that this fixed disk extends out from edge's radial direction of described urceolus.Adopt this brake structure additionally to increase the space hold of motor hardly, and structure is simple, braking is reliable.Described urceolus internal fixtion is provided with some permanent magnets 6, described some permanent magnet adopts identical watt shape hexahedron structure and circumferentially regularly arranged with axial both direction, arbitrary circumference and arbitrary described permanent magnet quantity axially arranged are multiple, two peripheral side of described permanent magnet are the tapered plane shape of inner side top rake shape, and its top rake angle θ is 5-35 degree (see Fig. 2).When after stator winding electrifying, the magnetic field interaction that the rotating magnetic field of generation and permanent magnet produce, drives urceolus synchronous rotary, converts electrical energy into mechanical energy thus.Permanent magnetic field is formed owing to have employed some permanent magnets regularly arranged on circumferential and axial, be conducive to the optimization realizing magnetic field structure, be particularly the tapered plane shape of the inner side top rake shape of 5-35 degree due to two peripheral side that circumference have employed multiple permanent magnet and permanent magnet, significantly reduce the aberration rate of field waveform; Owing to axially adopting multiple permanent magnet, be conducive to the length reducing permanent magnet, eliminate significantly or inhibit high order harmonic component.

Preferably, described some permanent magnets regular distribution mode in the circumferential and is axially for circumferentially aliging in the circumferential and being uniformly distributed, linearly align in the axial direction and be uniformly distributed, not only be conducive to circumference distribution and the axial distribution of each permanent magnet of reasonable arrangement thus, realize magnetic field optimization, and structure is simple, be convenient to processing, installation and maintenance.

Preferably, between the described permanent magnet that circumference is adjacent, leave spacing, be conducive to thus optimizing magnetic field and being convenient to install.

Preferably, the installation fixed form of described permanent magnet in described urceolus can adopt any one mode following:

(1) see Fig. 3, the inner surface of described urceolus be provided with somely axially to extend, the spaced and dovetail groove adapted with the shape and size of described permanent magnet of circumference, described permanent magnet is inlaid in corresponding dovetail groove;

(2) see Fig. 4, be provided with axially extended fixing press strip 7 between the described permanent magnet that circumference is adjacent, described axially extended fixing press strip is pressed on described urceolus and with the side, both sides of described permanent magnet by screw fastening.

Mounting means is planted for above-mentioned (1), described being inlaid between permanent magnet in corresponding dovetail groove and described dovetail groove can bond mutually, mounting means is planted for above-mentioned (2), the cross section of described axially extended fixing press strip can be rectangular or trapezoidal, also can be provided with not magnetic conduction binding agent 8 between the radial outer side of described axially extended fixing press strip and the inwall of described urceolus, improve the fastness of installation thus and can not have a negative impact to magnetic field.Described fixing press strip adopts square-section to be easy to processing, and trapezoid cross section can make the respective side of both sides and corresponding permanent magnet closely fit, and is conducive to improving fastness and reliability.

Preferably, mounting means (when being namely provided with axially extended fixing press strip between the described permanent magnet that circumference is adjacent) is planted for above-mentioned (2), two axial sides of described permanent magnet also can be the tapered plane shape of inner side top rake shape, leave spacing between axially adjacent described permanent magnet and be provided with the circumferential fixing press strip extended, described axially extended fixing press strip is pressed on described urceolus and with the side, both sides of described permanent magnet by screw fastening, the cross section of described axially extended fixing press strip is rectangular or trapezoidal, the fastness that can improve installation thus is further gone forward side by side one-step optimization magnetic field.

Preferably, the radially-outer surface of described permanent magnet is the Cylinder Surface that axis overlaps with described center shaft axis, the inner radial surface of described permanent magnet is that axis overlaps with described center shaft axis or parallel Cylinder Surface or the curved surface that connects for the Cylinder Surface be parallel to each other by multiple axis, and the connecting line of described multiple Cylinder Surface can be positioned on the Cylinder Surface that axis overlaps with described center shaft axis.

As further preferred structure, away from the edge of central shaft in described permanent magnet cross section (cross section perpendicular on the direction of center shaft axis) outward flange 61(radial direction diametrically) to be positioned in described center shaft axis (in permanent magnet cross section institute in the plane in the center of circle, described center shaft axis shows as a point, circular arc down together) is linear, near the edge of central shaft in described permanent magnet cross section inward flange 62(radial direction diametrically) curve in single circular arc or for being interconnected to by multi-section circular arc, by the optimal design of these curvilinear surface, air-gap field waveform can be improved significantly, reduce aberration rate.

Fig. 2 (a)-(c) provides the several embodiments relating to permanent magnet cross section inward flange shape diametrically:

In the embodiment that Fig. 2 (a) provides: described permanent magnet cross section inward flange is diametrically single circular arc, its center of circle is positioned in described center shaft axis, the radius of outward flange and inward flange is respectively R1 and R2, be formed in the permanent magnet of radial upper uniform thickness, make the radial inside and outside surface of each permanent magnet lay respectively at (rotor case and central axis) on the corresponding face of cylinder coaxial to described rotor case, and make spacing between permanent magnet inner surface diametrically and the outer surface of stator equal;

In the embodiment that Fig. 2 (b) provides: described permanent magnet cross section inward flange is diametrically single circular arc, its radius is equal with described permanent magnet cross section outer peripheral radius diametrically, be R1, its center of circle is positioned on described permanent magnet cross section outward flange mid point and the determined straight line of described center shaft axis, form the structure that the thick both sides of permanent magnet central authorities are thin thus, be conducive to eliminating edge harmonic wave;

In the embodiment of Fig. 2 (c), described permanent magnet cross section inward flange diametrically can adopt the shape of Fig. 2 (a) embodiment, also the shape of Fig. 2 (b) embodiment can be adopted, its special character is the circumferential side of Fig. 2 (a) embodiment and permanent magnet cross section inward flange diametrically in Fig. 2 (b) embodiment and permanent magnet cross section to be connected by a little concave arc line (radius is R3), instead of direct connection under normal circumstances or connected by convex fillet, can more effectively reduce edge harmonic wave thus.The setting of both sides circular arc serves the effect of similar " top rake ", is conducive to further torque ripple reduction, optimizes magnetic field, eliminates or reduce the active force of high order harmonic component significantly, for motor steady operation under low speed/Ultra-Low Speed, high pulling torque provides basic guarantee.

Preferably, the length (axial length) of described permanent magnet is between 30-95mm, the thickness of described permanent magnet is (when permanent magnet is when not waiting thick structure, refer to maximum ga(u)ge) between 8-18mm, thus under the prerequisite ensureing mechanical strength and magnetic field intensity, the impact of high order harmonic component can be reduced significantly.

Preferably, described permanent magnet adopts NdFeB material, to improve magnetic property.

Preferably, the material of described permanent magnet meets following condition, to ensure that motor normally runs, improves adaptability:

(1) remanent magnetism is at more than 1.25T, and HCJ is between 20-30kOe;

(2) demagnetization curve during 150-180 DEG C is straight line, does not occur degaussing flex point or occurs degaussing flex point but its maximum degaussing working point b _mhhigher than its degaussing flex point.

Thus, it is SH, UH or EH NdFeB material that described permanent magnet should choose the trade mark, or performance quite or more excellent other may the NdFeB material of the trades mark.Adopting and have the permanent magnetic material of These characteristics, the irreversible degaussing risk that the permanent magnet can eliminating traditional low-speed high-torque motor will produce under crane operating condition, is the important guarantee that the utility model can realize low speed or Ultra-Low Speed, high pulling torque.

Preferably, described stator slot adopts peariform slot, notch size k is between 2.5-4.5mm, and winding pitch is 1, and every circle stator winding coil is wrapped on a stator tooth, stator field can be optimized significantly thus, eliminate or reduce high order harmonic component, improve frequency characteristic, raising is exerted oneself, save material, reduce copper loss.

Preferably, pole embrace is 0.8-0.9, and pole slot fit adopts 8 pole 9 grooves, 10 pole 12 grooves, 20 pole 24 grooves, 30 pole 36 grooves, 22 pole 24 grooves, 16 pole 18 grooves or 32 pole 36 slot fit modes, to optimize air-gap field, eliminates cogging torque.

Through above-mentioned improvement, under preferred embodiment and in conjunction with other supporting optimization devices (such as high-quality frequency converter), the aberration rate of the air-gap field waveform of the utility model motor can reduce by 50%-80%, air-gap field irregularity of wave form is made to control below 15% or 10%, the aberration rate of back emf waveform controls below 10% or 8%, increase substantially the running stability of motor thus, reduce noise, reduce torque pulsation and contribute to increasing torque and export, and contribute to controlling temperature rise, therefore still can normally run when ultra-low speed big torsional moment, be specially adapted to crane hoisting mechanism and other similar applications that reel directly drives (using urceolus as reel).

For improving heat-sinking capability, improving radiating effect, particularly for the use occasion that some quantity of heat production is large, heat dissipation wind channel can be set at motor internal, by natural draft or force ventilated mode, directly aeration-cooling at motor internal.

Such as, following any one or multiple interior cooling structure (see Fig. 5-8) can be provided with:

(1) described central shaft is quill shaft, heat dissipation wind channel (see Fig. 5) in the axle that the axis hole 9 of described central shaft is configured for interior cooling;

(2) annulus (see Fig. 6) forming the outer heat dissipation wind channel 10 of stator is provided with between the lateral surface of described stator core and the medial surface of described external rotor;

(3) axially extending bore (see Fig. 6) forming heat dissipation wind channel 11 in stator is provided with in described stator core.

Usually, described stator core is made up of the stator punching stacked vertically of some same structures, in the case, preferably, described stator punching upper punch is shaped with some heat dissipation wind channel holes, in described stator, heat dissipation wind channel is made up of the corresponding heat dissipation wind channel hole on described each stator punching, thus can when substantially not increasing processing technology or technology difficulty, heat dissipation wind channel in the stator needed for formation.

Preferably, the some heat dissipation wind channel holes on described stator punching distribute along same even circumferential, thus can balanced radiating effect everywhere.When needs arrange multi-layer heat dissipation air duct hole, the some heat dissipation wind channel holes on described stator punching can along multiple circle distribution, and some heat dissipation wind channel holes of each circumference are uniformly distributed.

Preferably, described stator punching is distributed in same circumferentially the shape in some heat dissipation wind channel holes identical with size, the arc strip hole that to be with the center of described stator punching be the center of circle, improves the area of dissipation in air channel effectively when can ensure stator core intensity thus.

Preferably, the distance of this stator punching inward flange of the heat dissipation wind channel pitch-row on described stator punching (being positioned at the edge of the central shaft installing hole of central authorities) is less than apart from the outer peripheral distance of this stator punching, when heat dissipation wind channel effect, overall heat dissipation efficiency and heat-sinking capability is improved thus in the outer heat dissipation wind channel of composite stator and stator.

When needs forced ventilation, any one forced ventilation structure following can be adopted:

(1) when described central shaft is quill shaft, the axis hole of described central shaft outlet air end is uncovered, induced draft fans in axle is provided with in the axis hole of described central shaft outlet air end, when being also provided with heat dissipation wind channel in the outer heat dissipation wind channel of stator and/or stator, the two ends of described stator core respectively and leave the gap forming the even gap band 12 of calming the anger in end between the described fixed disk of respective end, in the outer heat dissipation wind channel of described stator and/or stator the two ends of heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end be communicated with, the sidewall of described central shaft outlet air end is provided with the central shaft side opening 13 of the even gap band of calming the anger in described end of axis hole and the respective end being communicated with described central shaft, in described axle, induced draft fans is positioned at the outside of this central shaft side opening,

(2) when being provided with heat dissipation wind channel in the outer heat dissipation wind channel of stator and/or stator, the two ends of described stator core respectively and leave the gap forming the even gap band 12 of calming the anger in end between the described fixed disk of respective end, in the outer heat dissipation wind channel of described stator and/or stator the two ends of heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end be communicated with, the fixed disk of described air intake is provided with wind inlet channel, the quantity of described wind inlet channel is one or more, air intake air pump is serially connected with in described wind inlet channel, the described wind inlet channel being positioned at described air intake air pump two ends is equipped with air intake unidirectional valve, described air intake air pump comprises cylinder body, described cylinder body is axially disposed within corresponding described fixed disk, the piston supporting with it is provided with in described cylinder body, described piston is connected with the piston rod extended to inside described fixed disk, cavity in described cylinder body is divided into rod chamber and rodless cavity by described piston, described rod chamber is positioned at the inner side of described rodless cavity, described central shaft is provided with the even gap band and form the multi-level cam of cam mechanism with described piston rod of calming the anger in the described end being positioned at respective end, described multi-level cam promotes described piston rod when rotating and moves back and forth, the air inlet of described air intake air pump and gas outlet are all arranged on the bottom of described rodless cavity, when being also provided with heat dissipation wind channel in axle, the sidewall of described central shaft air intake is provided with the central shaft side opening of the even gap band of calming the anger in described end of axis hole and the respective end being communicated with described central shaft.

Provide the embodiment of several cooling below:

Such as, the ventilation and heat in motor can be carried out by heat dissipation wind channel in the outer heat dissipation wind channel of described stator and stator, in the case, two even gap bands 12 of calming the anger in described end should be communicated with respective ventilation air duct 14 respectively, the fixed disk that described ventilation air duct can be opened in respective end is connected (see Fig. 7) with the even gap band of calming the anger in the end of respective end, with simplified structure, reduce windage and raise the efficiency, ventilation air duct on one of them fixed disk (fixed disk of such as right-hand member) is used as wind inlet channel, ventilation air duct on another fixed disk (fixed disk of such as left end) is used as exhaust air flue, when needs carry out forced ventilation, ventilation air duct on fixed disk described at least one is provided with forced ventilation device, by the draught effect (blast and/or extract out) of forced ventilation device, in described stator, heat dissipation wind channel and the outer heat dissipation wind channel of stator form the air-flow with Air Quantity Required and pressure, heat in stator core by heat exchange fall apart the outer heat dissipation wind channel of heat dissipation wind channel and stator in stator air-flow in taken out of by air-flow, realize the object of high effect forced heat radiation thus.The outer heat dissipation wind channel of said stator and the even gap band of calming the anger in end can be all the respective clearance of existing motor, without the need to resetting in addition, can be conducive to simplified structure according to the improvement needing to carry out on size and dimension of heat radiation and even pressure.

Preferably, the quantity of described wind inlet channel and exhaust air flue is several, be opened in respectively on the fixed disk of respective end, described exhaust air flue is provided with air-out unidirectional valve 15, described forced ventilation device is air intake air pump 16, the quantity of described air intake air pump is several, is connected in series in each self-corresponding described wind inlet channel respectively, the wind inlet channel at described air intake air pump two ends is equipped with corresponding air intake unidirectional valve (intake valve 17 such as described air pump, vent valve 18).Can by existing and other possible appropriate technologies of any suitable to the driving of described air pump and work method control.

Preferably, described air intake air pump comprises cylinder body, described cylinder body is axially disposed within corresponding described fixed disk, supporting piston is provided with in described cylinder body, described piston is connected with the piston rod extended to inside described fixed disk, described cylinder body internal cavity is divided into rod chamber and rodless cavity by described piston, described rod chamber is positioned at the inner side of described rodless cavity, described central shaft is provided with and is positioned at the even gap band and form the multi-level cam 19 of cam mechanism with described piston rod of calming the anger of respective end, described multi-level cam promotes described piston rod when rotating and moves back and forth, the air inlet of described air intake air pump and gas outlet are all located at the bottom of described rodless cavity, described rodless cavity forms a part for described wind inlet channel thus, realize the serial connection of described air pump on described wind inlet channel.Usually can arrange the wheel with described cam engagement on piston rod top, the boss of described cam also can adopt a curved-surface structure pushing up arc and two inner arc smooth connections, to reduce friction.During machine operation, described fixed disk rotates with external rotor and drives the piston rod of each air pump described to move back and forth by described multi-level cam, and then drive the piston reciprocating of each air pump to move, along with the movement of piston, rely on the effect of the air intake unidirectional valve on the wind inlet channel of described air intake air pump two ends, extraneous air enters rodless cavity, then enters the even gap band of calming the anger of respective end from rodless cavity, after heat dissipation wind channel in stator and the outer heat dissipation wind channel of stator, the air outlet through the other end flows out.According to actual needs, can by the boss quantity etc. on suitable air pump quantity (wind inlet channel quantity), air pump parameter and cam, the requirement of motor radiating to air quantity and blast can be met.This air pump, without the need to separately connecing external impetus, is started working automatically when machine operation, automatically stops when motor stops, very convenient.

The replacement scheme on fixed disk is all opened in as above-mentioned two ends ventilation air duct, described ventilation air duct also all can be opened in (as Fig. 8) on the central shaft of respective end, or the ventilation air duct of one end is opened on fixed disk, the ventilation air duct of the other end is opened in (as Fig. 9) on fixed disk.Ventilation air duct is offered and is conducive on center shaft improving the adaptability to forced ventilation device, simplify the syndeton between forced ventilation device, and improve draught capacity, the described ventilation air duct on center shaft offered can be made up of the central shaft axial hole central shaft axis hole of certain length (be equivalent to extend internally from axle head) 20 and the central shaft side opening 21 be arranged on the sidewall of described central shaft axial hole being opened in described central shaft end, the outer end opening of described central shaft axial hole, inner end shutoff (comprise and adopt closeouts shutoff or be arranged to blind hole), one end of described central shaft side opening is communicated with the even gap band of calming the anger in end of respective end, the other end is communicated with described central shaft axial hole.

When adopting breeze fan as forced ventilation device, the central shaft of air intake offers wind inlet channel, the air outlet of described breeze fan is communicated with described wind inlet channel or is directly arranged in described wind inlet channel by suitable breeze fan, adapt with this forced ventilation mode, described exhaust air flue can be opened on the fixed disk of respective end, also can be opened on the central shaft of respective end, when described exhaust air flue is opened on the fixed disk of respective end, the quantity of the described exhaust air flue be opened on the fixed disk of respective end usually can for multiple, to improve draught capacity.

When adopting induced draft fans as described forced ventilation device, described exhaust air flue is located on the central shaft of respective end, the air inlet of described induced draft fans is communicated with described exhaust air flue or is directly arranged in described exhaust air flue by suitable induced draft fans, adapt with this forced ventilation mode, described wind inlet channel can be opened on the fixed disk of respective end, also can be opened on the central shaft of respective end, when described wind inlet channel is opened on the fixed disk of respective end, the quantity of the described wind inlet channel be opened on the fixed disk of respective end usually can for multiple, to improve draught capacity.

The above-mentioned type of cooling on center shaft is all arranged for wind inlet channel and exhaust air flue, if the wind inlet channel on central shaft is communicated with exhaust air flue (being in fact exactly adopt through central shaft axis hole), form heat dissipation wind channel in axle, and the size of the central shaft side opening 13 of air intake and outlet air end is suitably set, air mass flow in the outer heat dissipation wind channel of stator, stator in heat dissipation wind channel and axle in heat dissipation wind channel is met the requirements, just can realize the stator object that in heat dissipation wind channel and axle, heat dissipation wind channel dispels the heat simultaneously in heat dissipation wind channel, stator simultaneously outward.

As shown in Figure 9, the air intake of described central shaft axis hole is by closure plate 22 shutoff, and the central shaft axis hole being provided with induced draft fan 23 or described outlet air end in the central shaft axis hole of described outlet air end is connected with induced draft fan.After induced draft fan starts, cool exterior air enters the even gap band of calming the anger in end of this end from the wind inlet channel air intake fixed disk, a part enters the even gap band of calming the anger in end of outlet air end after outer heat dissipation wind channel, then central shaft axis hole is entered by the central shaft side opening of respective end, another part enters the central shaft axis hole of this end through the central shaft side opening of air intake, centrally axle axis hole flows into outlet air end, two parts air stream converges in outlet air end central shaft axis hole, central shaft is sent through induced draft fan, form the air blast cooling to stator outer surface and central shaft inside thus, realize the object of high effect forced heat radiation thus.

The encoder of described motor can adopt external rotor coder, also can adopt common internal rotor encoder.

Usually, described encoder is rotary encoder, comprises the inner sleeve 24 and overcoat 25 that are mutually rotatably connected, gap is left between described inner sleeve and overcoat, described inner sleeve and putting outward is provided with corresponding position sensible element, to ensure the rotation of overcoat relative to inner sleeve, to obtain corresponding transducing signal.

When described encoder is the external rotor coder being arranged on described urceolus left end (see Figure 10), described inner sleeve to be socketed in from the described central shaft that left end extends out and to be fixedly connected with described central shaft, described overcoat is fixedly connected with described urceolus (can directly be fixed, also indirectly can fix by other structural members), described central shaft, urceolus, inner sleeve and overcoat are coaxial.During work, described inner sleeve maintains static together with described central shaft, described overcoat and described urceolus Complete Synchronization ground rotate, and the parameter such as angular displacement, rotary speed, rotary acceleration of described overcoat is identical with described urceolus, are conducive to the reliability and the raising accuracy of detection that ensure detection data.

Preferably, the mode that described inner sleeve is fixedly connected with described central shaft is be socketed between described inner sleeve on described central shaft and described central shaft to be provided with linking bond 26, and this mode structure be connected and fixed is simple, easy for installation, good reliability.

Preferably, described central shaft left end is multidiameter neck for connecting the axle journal of described inner sleeve, the right-hand member of described inner sleeve is located by the corresponding seam on described multidiameter neck, the left end of described inner sleeve is located by the fixedly sleeved thrust ring 27 at described multidiameter neck, ensures inner sleeve location in the axial direction and fixing thus by simple structure.

Preferably, described multidiameter neck is also socketed with spacer 28, described spacer described inner sleeve and on the left of described inner sleeve between the described interior loop port of locating, the right-hand member of described spacer connects with the end face of described seam, the left end of described spacer connects with the right-hand member of described inner sleeve, the right-hand member of described thrust ring connects with the left end of described inner sleeve, by the setting of spacer, is beneficial to inner sleeve to be positioned on suitable axial location.

Preferably, described spacer is made up of one section of tube-in-tube structure, and the axis middle part of described tube-in-tube structure is provided with toroidal membrane, and described toroidal membrane is positioned at the left side of the described rotor bearing of left end, its external diameter is greater than the internal diameter of this rotor bearing, can also play protective action thus to the rotor bearing of respective end.

Preferably, the outward flange position of the described fixed disk of left end is fastened by bolts in the annular flange flange 29 at described urceolus corresponding port place, the inner circle of described fixed disk is fixedly connected with the outer ring of respective rotor bearing, easily and effectively achieves the described shutoff of urceolus left end port and the connection between urceolus and rotor bearing thus.

External diameter due to described rotor bearing is under normal circumstances greater than the external diameter of described overcoat, preferably, described outer putting is provided with overcoat flange 30, described overcoat flange is positioned at the left side of a flange for connection 31, and be fastened by bolts on the inward flange position of this flange for connection, described flange for connection is positioned at the left side of the fixed disk of described left end, the outward flange position of described flange for connection is fastened by bolts the inward flange position of the fixed disk at described left end, realizes being fixedly connected with between described overcoat with described urceolus thus.Easily and effectively solve the problem because described encoder overcoat size cannot directly be connected with fixed disk with factors such as positions thus.

Under the mounting means of above-mentioned external rotor coder, the left end of described central shaft is the same with right-hand member, be arranged on the left rigid mount 32 of its correspondence, described left rigid mount is arranged on the outside of described external rotor coder, not only facilitate the installation of encoder thus, simplify syndeton, also easy to use and maintenance.

When described encoder is the internal rotor encoder 33 being arranged on described urceolus left end (see Figure 11), usual employing small-bore internal rotor encoder, described small-bore internal rotor encoder is provided with connection multidiameter 34 and bearing spider, described connection multidiameter is arranged on described bearing spider by outer bearing 35, the right-hand member of described connection multidiameter is provided with radial flange, described radial flange coaxially connects the fixed disk 4 of described left end, the inner sleeve of described encoder is fixedly sleeved coaxially to be connected with the left end of multidiameter with described connection with the left part of multidiameter or by shaft coupling 36 or similar connector in described connection, the overcoat of coded device is fixedly connected with described bearing spider by connector.Because the inner sleeve of encoder is coaxially connected with described urceolus 3 by connection multidiameter, by corresponding connector, overcoat is maintained static, internal rotor encoder under routine techniques can be used for the detection of the larger external rotor electric machine of diameter thus, such as ultra-low speed big torsional moment motor disclosed in the utility model.

Usually, described bearing spider is preferably docked by the seat of honour 37 and lower seat 38 two parts and forms, together with the described seat of honour is fastened by bolts with lower seat, to facilitate processing, installation and maintenance.

Preferably, described outer bearing adopts double-row self-aligning bearing, to improve stress performance.

Preferably, described bearing spider is fixed with the baffle ring 39 for bearing outer ring axial limiting and bearing cap 40, described baffle ring is positioned at the right side of described outer bearing, described bearing cap is positioned at the left side of described outer bearing, described baffle ring and bearing cap leave gap with described connection with between multidiameter, to realize locating and avoiding the obstruction to connection multidiameter reliably.

Usually, on described connection multidiameter, the diameter of each shaft part is successively decreased to a left side piecemeal by the right side, to be adapted to the installation dimension requirement of on urceolus and encoder corresponding.

Usually, described connection multidiameter can be solid or hollow rotary structure part, when adopting hollow-core construction, can carry out threading and ventilation etc. by mesopore.

Preferably, described encoder overcoat and the connector between described bearing spider comprise the Special-shaped flange 41 that transition is connected, the two ends of described Special-shaped flange are respectively peripheral annual connecting portion and inner edge annular connecting portion, part between described peripheral annual connecting portion and inner edge annular connecting portion is in the tubular with ring ladder, described peripheral annual connecting portion is in the right-hand member of described Special-shaped flange, be connected with bearing cap, described inner edge annular connecting portion is in the left end of described Special-shaped flange, be connected with the described outer mounting flange put, the axial location of corresponding and the connection request of radial dimension on motor and encoder are not only adapted to thus, but also effective protective effect is played to parts such as outer bearings.

Described rigid mount (right rigid mount and, if any, left rigid mount) form of any suitable can be adopted, because the frictional force between columniform optical axis and columniform unthreaded hole is limited, therefore when the moment of torsion of central shaft is very large, be easy to occur skidding, therefore, can by the central shaft shaft part cooperatively interacted and axle installing hole 42 be arranged to non-circular, such as polygonal hole (see Figure 12) and cydariform hole (Figure 16), or pass radially through by pin 43 or bolt etc. the hole (see Figure 14) be positioned on rigid mount and central shaft, its part is made to be positioned at rigid mount, another part is positioned at central shaft, central shaft relative stiffness bearing is stoped to rotate thus, can also by axle installing hole be arranged to splined hole (see Figure 17), or linking bond 44(is set between central shaft and axle installing hole see Figure 15) etc. mode stop central shaft relative stiffness bearing to rotate.

Usually, described axle installing hole can be set directly on described rigid mount, namely be arranged in the main body of described rigid mount, preferably, rigid mount can adopt by the main body of rigid mount and adjusting sleeve 45 Split type structure, described axle installing hole is arranged on the central authorities of described adjusting sleeve, the outside of described adjusting sleeve is cylindrical, the main body of described rigid mount is provided with the adjusting sleeve installing hole corresponding with described adjusting sleeve outer rim, described adjusting sleeve is plugged on described adjusting sleeve installing hole, with described adjusting sleeve installing hole interference fits or interference fit, and be provided with or be not provided with on fastening bolt, can described adjusting sleeve and central shaft be installed in the adjusting sleeve installing hole of the main body of rigid mount as a whole during installation, and adjusting sleeve installing hole is cylindrical hole, facilitate central shaft centering, reduce the circumference difficulty of angle adjustment and the coaxial adjustment difficulty of two rigid mounts when central shaft is installed, also reduce the processing request of rigid mount and central shaft axle journal, when the two ends of central shaft are installed on rigid mount, usually a rigid mount is had at least to be the above-mentioned rigid mount being provided with adjusting sleeve.

Preferably, the quantity of described stator temperature transducer is one or more, the setting position of described stator temperature transducer (refers to the position of collecting temperature, corresponding temperature gathers position) can be one or more, can need according to difference and process and operational facility thus, quantity and the installation site of stator temperature transducer are set flexibly.

Such as, described stator temperature transducer can be arranged on following optional position:

A) in the stator slot of described stator temperature sensor setting in described stator core, between winding in corresponding stator slot cell wall and this stator slot, the temperature collected thus embodies the temperature of stator core substantially, can be considered or be used as the temperature of stator core;

B) described stator core inside is provided with stator temperature sensor mounting hole, described stator temperature transducer is inlaid in described stator temperature sensor mounting hole, the temperature of stator core inside can be collected thus more accurately, described stator temperature sensor mounting hole can be arranged on the maximum temperature position of stator core, to obtain the maximum temperature in stator core, avoid because of actual acquisition to stator core internal temperature break down lower than its maximum temperature causes these positions Yin Wendu to exceed working temperature higher limit unshakable in one's determination; Usually, described stator temperature sensor mounting hole can punching be out in the punching process of corresponding lamination.

C) winding of described stator temperature sensor setting in the stator slot of described stator core is inner, directly can collect the internal temperature of winding thus.Based on same reason noted earlier, the stator temperature transducer that winding inside is arranged also preferably is arranged on temperature highest portion position in winding;

D) can also be provided with in described central shaft or not be provided with the stator temperature transducer for gathering central shaft temperature, central shaft temperature can be obtained by the stator temperature transducer for gathering central shaft temperature, so that compared with other temperature, temperature gradient on analysis and research motor changes, and can when control overflow is relatively low as control foundation or by conduct control foundation after correction.

Owing to being generally all temperature probe is positioned on motor bearings or motor housing carry out thermometric under prior art, heat production and the temperature regime of motor internal can not be reflected, particularly corresponding external rotor permanent magnet synchronous machine, the copper loss of stator winding and the iron loss of stator core are the main causes of heating, and the temperature that first these heat energy cause stator core and stator winding rises, just shell or bearing is arrived through longer path, therefore, the temperature recorded from shell or bearing can not embody the temperature of stator interior truly, be unfavorable for making motor status judging accurately, also be unfavorable for controlling accurately motor.In addition because people are tested by the time and define the working level of motor, but in the running of reality, user generally can not go the time adding up motor operation, after running to the maximum operating time of working level restriction, often there will be and do not carry out shutting down the phenomenon waiting process and continuation operation to motor, when people do not grasp motor internal temperature, be easy to cause accident to occur, if and completely according to duty work, although usually can safe operation be ensured, but often also there is the phenomenon of just shutting down before motor does not reach the internal temperature that should shut down, the utilance of motor is caused to decline, affect operating efficiency can judge motor fatigue state by stator temperature, therefore, judge that motor fatigue state and degree are more accurate by stator temperature, the working temperature higher limit corresponding with temperature acquisition position on stator can be set, when the temperature collected meets or exceeds corresponding working temperature higher limit, judge that motor is tired also to judge according to this to control to shut down, when collected temperature is lower than corresponding working temperature higher limit, judge that motor is tired and allow motor to carry out work.

Preferably, when the temperature that described stator temperature transducer collects is lower than corresponding working temperature higher limit, calculate the motor continuous working period of the working temperature higher limit reaching corresponding, and in this, as the maximum duration allowing motor to continue continuous firing, make user understand and grasp the actual conditions of motor thus, the operating time follow-up to motor accomplishes to know what's what.The calculating of described maximum duration, can according to the program of setting, periodically or calculate, also can carry out corresponding temperature acquisition and calculating according to the instruction of artificial input under certain condition.

Ultra-low speed big torsional moment motor of the present utility model can also be provided with the current signal collection device for obtaining current of electric online and/or the voltage signal acquisition device for obtaining electric moter voltage online, described current signal collection device is the current sensor of current input signal for gathering stator winding and/or the frequency converter for exporting its current output signal, described voltage signal acquisition device is the voltage sensor of voltage input signal for gathering stator winding and/or the frequency converter for exporting its voltage output signal, when two kinds of signals are all obtained by frequency converter, the frequency converter of output current signal and voltage signal can be same frequency converter, current signal is obtained by current signal collection device, with described current signal for load transducing signal or calculated by described current signal and obtain payload data, voltage signal is obtained by described voltage signal acquisition device, the transducing signal being rotary speed with described voltage signal or calculated by described voltage signal and obtain rotary speed data.

Utilize the principle of current signal and voltage signal determination motor load and the motor speed of service as follows respectively: to carry out described permagnetic synchronous motor the vector control of=0, under the effect of controller, stator winding supply current (i.e. stator current) only has pure torque current , and there is no exciting current .Motor runs in such a mode, there is the positive correlation determined between motor load and winding power electric current and between the motor speed of service and winding power voltage (i.e. stator voltage).Therefore, directly get electric moter voltage information and current information, just be equivalent to be aware of the motor speed of service and motor load, the various direct-detection motor speed of service compared to existing technology and the detection mode of motor load more reliable, and implement more simple, quick.

Figure 18 is a kind of current loading profile being used as the high-torque low speed permanent magnet synchronous motor of crane gearless lifting mechanism under showing above-mentioned vector control state, all corresponding to the load (lift heavy determined under the electric current determined arbitrarily, therefore the lift heavy of motor just can be calculated according to winding power electric current, also direct according to actual needs gathered current signal can be used as the transducing signal embodying lift heavy, in motor/overload crane controls, according to the current signal threshold value of the relation setting check lift heavy overload between lift heavy and electric current, when gathered current signal meets or exceeds given current signal threshold value, start overload protection action, stop machine operation, greatly facilitate the collection of lift heavy signal and the confirmation of motor overload thus, greatly simplifie data processing amount, avoid the lift heavy data distortion that causes because of weight sensor in reality and lift heavy overload controls inaccurate defect, also the potential safety hazard reduced and eliminate because shielding weighing instrument brings is contributed to.

Figure 19 is a kind of voltage/speed curves being used as the high-torque low speed permanent magnet synchronous motor of crane gearless lifting mechanism under showing above-mentioned vector control state, this curve is the simple curve of a rising, all corresponding to the motor speed of service determined under the voltage determined arbitrarily, therefore the motor speed of service of motor can be calculated according to winding power voltage, also corresponding supervising device can be sent into by the direct transducing signal being used as gathered voltage signal to embody the motor speed of service according to actual needs, monitor or control the running status of motor, but when needing to limit motor maximum speed, the voltage signal threshold value that can exceed the speed limit according to the relation setting check motor speed of service between the motor speed of service and voltage, when gathered voltage signal meets or exceeds given voltage signal threshold value, start overspeed protection action, thus for the on-line checkingi of the motor speed of service provides one mode easily.

As an application mode of the utility model motor, this ultra-low speed big torsional moment external rotor electric machine can be used for the lifting mechanism of crane, with the huge gear box arranged for deceleration transmission under eliminating prior art, Figure 20 gives the embodiment of the monkey under this application, this trolley comprises by a left side, right-hand member beam and two ends respectively with a described left side, the trolley frame that the balance beam that right-hand member beam connects is formed, also comprise lifting motor and steel wire rope winding mechanism, a described left side, right-hand member beam is separately installed with corresponding adhesion wheel/adhesion wheel group and by motor car wheel/by motor car wheel group, described adhesion wheel/adhesion wheel assembly has wheel drive motors, described lifting motor adopts the utility model any one ultra-low speed big torsional moment motor disclosed, described lifting motor is by left, the rigid mount 46 at right two ends is arranged on a described left side, on right-hand member beam, be provided with for preventing both anti-rotation structures in relative rotation between the installation shaft of described rigid mount and described motor, described installation shaft is generally the central shaft of motor, be fixedly connected with between rigid mount, the urceolus 3 of described motor is for lay winding wire ropes, form the reel of described steel wire rope winding mechanism, described steel wire rope winding mechanism also comprises the assembly pulley supporting with described steel wire rope, described assembly pulley is made up of movable pulley and fixed pulley, the quantity of described fixed pulley and the quantity of described movable pulley are respectively one or more, described fixed pulley is arranged on described balance beam.Because the external rotor of lifting motor is directly as reel, eliminate the gear box under prior art, not only avoid the various defects because gear box brings thus, but also the external rotor permanent magnet synchronous machine particularly various superior functions that have of low speed (containing Ultra-Low Speed) high pulling torque external rotor permanent magnet synchronous machine can be made full use of.

Preferably, the external rotor two ends of described lifting motor are equipped with fixed disk 4, wherein the described fixed disk of one end is connected with rotary encoder, positional information and the movable information of external rotor can be gathered thus by rotary encoder, the described fixed disk of the other end is furnished with the brake tongs device of formation disk brake supporting with it, this fixed disk forms the brake disc of described disk brake and the disk body (also can be the braking ring flange be fixedly connected with the fixed disk of respective end) outside the housing being extended in described external rotor by its radial direction is coordinated with the brake pad of described brake tongs device, can control the work of lifting motor thus, the braking of lifting motor and/or the position maintenance after braking is carried out by disk brake.

Usually, described disk brake can be electromagnetic disc type brake, to facilitate control.

Usually, the rigid mount that described rigid mount adopts polygon to coordinate or other any one can prevent installation shaft to skid in axle installing hole the rigid mount rotated, it is polygonal axle installing hole that the rigid mount that described polygon coordinates is provided with cross section, and described lifting motor adopts corresponding polygonized structure and grafting and be fixed in the axle installing hole of rigid mount of described polygon cooperation in the installation shaft of respective end; Also the rigid mount of rounded engagement can be adopted, it is circular axle installing hole that this rigid mount is provided with cross section, described lifting motor adopts cylindrical structural in the installation shaft of respective end and is plugged in the axle installing hole of the rigid mount of described rounded engagement, by arranging key connection structure, splined structure or squeezing into steady pin or improve the crystallized ability of rigid mount to installation shaft by modes such as fastening bolts.

Preferably, during the rigid mount that described rigid mount adopts polygon to coordinate, the cross section of described axle installing hole is positive triangle, square or regular hexagon, the support body of described rigid mount is divided into two parts of docking relatively or described support body to be provided with the integral type support body of the side-wall shaft of axle installing hole to the gap cut open, the described two-part support body of docking mutually that is divided into is fastened by bolts together, the side-wall shaft of axle installing hole is passed through bolt-locking to the integral type support body in the gap cut open in the both sides in described gap by described being provided with.

When described rigid mount adopts the rigid mount of rounded engagement, preferably, the fixed form of described columniform fixed axis on the axle installing hole of the rigid mount of described rounded engagement is following any one or multiple combination: (1) is fixed (see Figure 14) by the some pins be radially distributed on described axle installing hole sidewall; (2) fixed by the some trip bolts be distributed on described axle installing hole sidewall; (3) be fixed by the some projections be distributed on described axle installing hole inwall; (4) by fixing with described axle installing hole interference fit; Or (5) sidewall of described axle installing hole is provided with at least one butt seam, the two ends of described butt seam are provided with by two ends to trip bolt fastening together or fastening bolt, are fixedly clamped by the columniform fixed axis being positioned at described axle installing hole thus.Realize lifting motor effectively and reliably supporting on trolley frame thus.According to actual needs, such as, the needs of internal rotor rotary encoder can be installed, the rotating shaft be connected be set in one end of lifting motor, and by corresponding bearing, this rotating shaft be arranged on the rigid mount of corresponding side with lifting motor external rotor.

Preferably, described one or more fixed pulley is arranged in fixed pulley support, described fixed pulley support is fixedly mounted on described balance beam, realize the installation of described fixed pulley on described balance beam thus, fixed pulley axle is provided with in described fixed pulley support, the mounting means of described fixed pulley in described fixed pulley support is for be arranged in described fixed pulley axle by bearing or axle sleeve, described one or more movable pulley is arranged in moving pulley bracket, movable pulley axle is provided with in described moving pulley bracket, described movable pulley is arranged in described movable pulley axle by bearing or axle sleeve, described moving pulley bracket is provided with suspension hook 48.Contribute to the normal operation ensureing assembly pulley thus.

Preferably, described multiple fixed pulley and described multiple movable pulley all adopt double row type to distribute, be beneficial to rational deployment and smooth movements, the upper outer of end carriage described in side can set up the dolly conduction rack for introducing power supply, described trolley frame can be provided with two respectively to described lifting motor and wheel drive motors dispensing electricity distribution box, described distribution box hangs over the side of described end carriage or is erected on described trolley frame, described trolley frame can be provided with inspection platform, the side of described inspection platform should be provided with railing, the two ends of described end carriage all should be provided with sweeps rail plate and buffer, the side of described end carriage should be provided with safety ruler.

The alleged watt shape hexahedron of the utility model refers to that its main part is in the cylinder to be similar to watt, comprise the surface of two radial surfaces, two circumferential surfaces and two axis, the spaced side being connected to form cylinder between two, two surfaces of two wherein radial surfaces and circumference, two axial surfaces form the top and bottom of this cylinder, in almost fan.Arbitrary seamed edge of cylinder both can be the seamed edge that Plane intersects, surface intersection, plane and surface intersection are formed, and also can be the structure of curved surface or other any suitable seamlessly transitted.

On permanent magnet alleged by the utility model, certain surface tapered plane shape in inner side top rake shape refers to the state of the interior side direction permanent magnet inner radial surface intermediate, inclined of its radial direction.

The top rake angle of two peripheral side of the permanent magnet alleged by the utility model refers to the line of the outward flange two-end-point of permanent magnet cross section and center shaft axis for measuring standard, the angle of the circumferential side of permanent magnet cross section and the above-mentioned line of corresponding side.

Concave arc line alleged by the utility model refers to the entity relative to its place, the circular arc line that its bending direction makes the volume of described entity or area diminish.

When the utility model relates to central shaft and the urceolus part identical with central shaft bearing of trend with bearing of trends such as stators, unless otherwise indicated, alleged two ends or two ends, left and right refer to the two ends of centrally axle axis direction, wherein " left side " and " right side " limits the facility being only used to state, state any one end and the other end corresponding thereto of centrally axle axis direction respectively, avoiding mutually obscuring because stating the unclear two ends that cause, not forming the restriction of left and right directions when reality is used.

Bearing alleged by the utility model connects the rotatable flexible connection for being realized by bearing.

Structure alleged by the utility model comprises the structure formed by a part and the structure formed by multiple, the structure be provided with between alleged two parts refers to the structure had an impact to two mutual annexations of part or type of action, comprise this structure of these two parts or wherein arbitrary formation itself, also comprise this structure formed after increasing other parts.

Cylinder Surface alleged by the utility model is the part curved surface forming cylindrical side, and the axis of alleged Cylinder Surface is the axle of this Cylinder Surface Correspondent cy linder.

The alleged circumference of the utility model is along the circumferential direction, and to any point circumferentially, be the tangential direction of this point, described radial direction is along diameter of a circle direction, axle axis or be parallel to the extension mode of center shaft axis centered by alleged axis.Unless otherwise indicated, when relating to permanent magnet or relate to urceolus and stator and each several part thereof, alleged axis and the radial circumference related to be with the plane of middle bobbin axes normal on and the circumference of the center of circle in center shaft axis.

Outer and inner alleged by the utility model is relative concept, in radial directions, in the direction of center shaft axis is, otherwise is outward; In the axial direction, the direction that the two ends to central shaft extend is outward, otherwise in being, such as, stator core is positioned at the inner side of fixed disk.

Annulus alleged by the utility model refers to the cross section in this gap ringwise.

Induced draft fans alleged by the utility model refers to the gas conveying machinery for extracting air, can select suitable pattern according to factors such as temperature, air quantity and resistances.

Polygonal hole alleged by the utility model or cydariform hole refer to that its cross section is the hole of polygon or cydariform, equally, polygon post (or other stereochemical structures) swelled column (or other stereochemical structures) refers to that the outline of its cross section is the post (or other stereochemical structures) of polygon or cydariform, alleged cydariform is the figure surrounded by two Line Segment and two camber lines of homonymy end points of connecting these two straightway both sides respectively, article two, camber line is the cambered outwards camber line in middle part relative to this this figure, this figure is relative to the mid point line specular of two straightways, relative to the line of centres also specular of two camber lines.

Steel wire rope alleged by the utility model comprises the flexible cable twisted into by many or multiply finer wire, also comprises the same purposes rope made for other any suitable material.

Trapezoidally alleged by the utility model comprise trapezoidal and contour approximation alleged by geometry shape trapezoidal alleged by the geometry, be made up of four edges, its upper base and go to the bottom edge line can be curved, each line junction can be horn shape, also can in level and smooth easement curve shape, equally, described rectangle comprises the shape of trapezoidal and contour approximation alleged by geometry rectangle alleged by the geometry.

Motor alleged by the utility model is motor.

Clearly record except the utility model or can show that according to common practise the utility model any one restriction to any one technological means depends on except the situation to any one restriction of another technological means arbitrarily, the utility model can limit combination in any with to any one of any another technological means to any one restriction of any one technological means, equally, clearly record except the utility model or can show that according to common practise the utility model any one restriction to any one technological means depends on except any situation that another limits to this technological means, the utility model can limit combination in any with to any another of this technological means to any one restriction of any one technological means.

Claims (10)

1. a ultra-low speed big torsional moment motor, comprise external rotor and stator, described stator comprises central shaft, the stator winding being fixedly mounted on the stator core on described central shaft and being fixedly mounted in described stator core, it is characterized in that described stator is provided with the stator temperature transducer for gathering temperature signal in stator, described external rotor comprises urceolus, the inner side of described urceolus is installed with some permanent magnets, the two ends of described urceolus are all installed with fixed disk and are connected with described central shaft bearing by fixed disk, described some permanent magnet adopts identical watt shape hexahedron structure and circumferentially regularly arranged with axial both direction, arbitrary circumference and arbitrary described permanent magnet quantity axially arranged are multiple, two peripheral side of described permanent magnet are the tapered plane shape of inner side top rake shape, its top rake angle is 5-35 degree, the right-hand member of described central shaft extends out in connected respective end bearing, be fixedly mounted on right rigid mount, described right rigid mount is provided with axle installing hole, the right part of described central shaft insert described right rigid mount axle installing hole and and be provided with for preventing both anti-rotation structures in relative rotation between described right rigid mount, the described fixed disk of right-hand member forms the brake disc of disk brake, its diameter is greater than the diameter of described urceolus, extend out from edge's radial direction of described urceolus, the jaw type brake block of the brake tongs device of described disk brake is positioned at the both sides at the outward flange position that this fixed disk extends out from edge's radial direction of described urceolus.

2. ultra-low speed big torsional moment motor as claimed in claim 1, it is characterized in that described stator core is provided with the stator slot for winding described in setting-in, described stator slot is peariform slot, notch size k is between 2.5-4.5mm, the pitch of described winding is 1, every circle coil winding is on a stator tooth, and adopt the pole slot fit mode of 8 pole 9 grooves, 10 pole 12 grooves, 20 pole 24 grooves, 30 pole 36 grooves, 22 pole 24 grooves, 16 pole 18 grooves or 32 pole 36 grooves, described permanent magnet adopts NdFeB material, length is 30-95mm, thickness is 8-18mm, and pole embrace is 0.8-0.9.

3. ultra-low speed big torsional moment motor as claimed in claim 1 or 2, it is characterized in that described some permanent magnets regular distribution mode in the circumferential and is axially for circumferentially aliging in the circumferential and being uniformly distributed, linearly align in the axial direction and be uniformly distributed, it is linear that described permanent magnet cross section outward flange is diametrically the circular arc that is positioned in described center shaft axis of the center of circle, and described permanent magnet cross section inward flange diametrically adopts any one version following:

Version one: described inward flange is single circular arc, the center of circle is positioned in described center shaft axis;

Version two: described inward flange is single circular arc, the center of circle is positioned on described permanent magnet cross section outward flange mid point and the determined straight line of described center shaft axis, and its radius equals described outer peripheral radius;

Version three: described inward flange is single circular arc, the center of circle is positioned in described center shaft axis, and the circumferential side of permanent magnet cross section inward flange diametrically and permanent magnet cross section is connected by a little concave arc line;

Version four: described inward flange is single circular arc, the center of circle is positioned on described permanent magnet cross section outward flange mid point and the determined straight line of described center shaft axis, and its radius equals described outer peripheral radius, the circumferential side of permanent magnet cross section inward flange diametrically and permanent magnet cross section is connected by a little concave arc line.

4. the ultra-low speed big torsional moment motor as described in claim 1,2 or 3, is characterized in that being provided with following any one or multiple interior cooling structure:

Interior cooling structure one: described central shaft is quill shaft, heat dissipation wind channel in the axle that the axis hole of described central shaft is configured for interior cooling;

Interior cooling structure two: be provided with the annulus forming the outer heat dissipation wind channel of stator between the lateral surface of described stator core and the medial surface of described external rotor;

Interior cooling structure three: be provided with the axially extending bore forming heat dissipation wind channel in stator in described stator core, the axially extending bore in described stator core is formed by connecting by forming the corresponding heat dissipation wind channel hole that the stator punching of described stator core is gone out,

The draft type of above-mentioned each heat dissipation wind channel is natural draft and/or forced ventilation.

5. ultra-low speed big torsional moment motor as claimed in claim 4, is characterized in that adopting any one forced ventilation structure following:

Forced ventilation structure one: when described central shaft is quill shaft, the axis hole of described central shaft outlet air end is uncovered, induced draft fans in axle is provided with in the axis hole of described central shaft outlet air end, when being also provided with heat dissipation wind channel in the outer heat dissipation wind channel of stator and/or stator, the two ends of described stator core respectively and leave the gap forming the even gap band of calming the anger in end between the described fixed disk of respective end, in the outer heat dissipation wind channel of described stator and/or stator the two ends of heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end be communicated with, the sidewall of described central shaft outlet air end is provided with the central shaft side opening of the even gap band of calming the anger in described end of axis hole and the respective end being communicated with described central shaft, in described axle, induced draft fans is positioned at the outside of this central shaft side opening,

Forced ventilation structure two: when being provided with heat dissipation wind channel in the outer heat dissipation wind channel of stator and/or stator, the two ends of described stator core respectively and leave the gap forming the even gap band of calming the anger in end between the described fixed disk of respective end, in the outer heat dissipation wind channel of described stator and/or stator the two ends of heat dissipation wind channel respectively calm the anger gap band even with the described end of respective end be communicated with, the fixed disk of described air intake is provided with wind inlet channel, the quantity of described wind inlet channel is one or more, air intake air pump is serially connected with in described wind inlet channel, the described wind inlet channel being positioned at described air intake air pump two ends is equipped with air intake unidirectional valve, described air intake air pump comprises cylinder body, described cylinder body is axially disposed within corresponding described fixed disk, the piston supporting with it is provided with in described cylinder body, described piston is connected with the piston rod extended to inside described fixed disk, cavity in described cylinder body is divided into rod chamber and rodless cavity by described piston, described rod chamber is positioned at the inner side of described rodless cavity, described central shaft is provided with the even gap band and form the multi-level cam of cam mechanism with described piston rod of calming the anger in the described end being positioned at respective end, described multi-level cam promotes described piston rod when rotating and moves back and forth, the air inlet of described air intake air pump and gas outlet are all arranged on the bottom of described rodless cavity, when being also provided with heat dissipation wind channel in axle, the sidewall of described central shaft air intake is provided with the central shaft side opening of the even gap band of calming the anger in described end of axis hole and the respective end being communicated with described central shaft.

6. the ultra-low speed big torsional moment motor as described in claim 1,2 or 3, is characterized in that the left end of described urceolus is connected with encoder, the connected mode between the left end of described urceolus and described encoder be following any one:

Connected mode one: described encoder is external rotor coder, comprise the inner sleeve and overcoat that are mutually rotatably connected, the left end of described central shaft extends out in connected respective end bearing, be fixedly mounted on left rigid mount, described left rigid mount is provided with axle installing hole, in the axle installing hole that the left end of described central shaft inserts described left rigid mount and and be provided with for preventing both anti-rotation structures in relative rotation between described left rigid mount, described inner sleeve is fixedly connected with the left end of described central shaft, described overcoat is fixedly connected with the described fixed disk of left end, described central shaft, urceolus, inner sleeve and overcoat coaxial,

Connected mode two: described encoder is internal rotor encoder, comprise the inner sleeve and overcoat that are mutually rotatably connected, described encoder is furnished with connection multidiameter and bearing spider, described connection multidiameter is arranged on described bearing spider by outer bearing, the right-hand member of described connection multidiameter is provided with radial flange, described radial flange is coaxially fastened on the described fixed disk of left end, the inner sleeve of described encoder is fixedly sleeved coaxially to be connected with the left end of multidiameter with described connection with the left part of multidiameter or by shaft coupling in described connection, the overcoat of coded device is fixedly connected with described bearing spider by connector, described outer bearing adopts double-row self-aligning bearing.

7. ultra-low speed big torsional moment motor as claimed in claim 6, it is characterized in that described rigid mount adopt following any one:

Rigid mount one: the axle installing hole on described rigid mount is polygonal hole, the central shaft shaft part of connected respective end is identical polygon, described axle installing hole and the described central shaft shaft part interference fit inserted wherein or interference fits, corresponding polygonized structure constitutes described anti-rotation structure, in the main body that described axle installing hole is set directly at described rigid mount or be arranged in adjusting sleeve, when being arranged in described adjusting sleeve, the outer rim of described adjusting sleeve is cylindrical, described axle installing hole is arranged on the central authorities of described adjusting sleeve, the main body of described rigid mount is provided with the adjusting sleeve installing hole corresponding with described adjusting sleeve outer rim, described adjusting sleeve is plugged on described adjusting sleeve installing hole, with described adjusting sleeve installing hole interference fits or interference fit, and be provided with or be not provided with fastening bolt,

Rigid mount two: the axle installing hole on described rigid mount is cylindrical hole, the described central shaft shaft part of respective end is cylindric, described rigid mount is provided with some pin via holes penetrating described axle installing hole sidewall, the corresponding shaft part of described central shaft is provided with some pin blind holes of docking with described some pin via holes respectively, some pins or bearing pin wedge pin via hole and the pin blind hole of described mutual docking respectively, and described pin or bearing pin and supporting structure thereof constitute described anti-rotation structure;

Rigid mount three: the axle installing hole on described rigid mount is cylindrical hole, the described central shaft shaft part of respective end is cylindric, multiple key is provided with between described axle installing hole and the described central shaft shaft part inserting in described axle installing hole, described key and supporting structure thereof constitute described anti-rotation structure, in the main body that described axle installing hole is set directly at described rigid mount or be arranged in adjusting sleeve, when being arranged in described adjusting sleeve, the outer rim of described adjusting sleeve is cylindrical, described axle installing hole is arranged on the central authorities of described adjusting sleeve, the main body of described rigid mount is provided with the adjusting sleeve installing hole corresponding with described adjusting sleeve outer rim, described adjusting sleeve is plugged on described adjusting sleeve installing hole, with described adjusting sleeve installing hole interference fits or interference fit, and be provided with or be not provided with fastening bolt,

Rigid mount four: the axle installing hole on described rigid mount is cydariform hole, the described central shaft shaft part of connected respective end is identical cydariform, described axle installing hole and the described central shaft shaft part interference fit inserted wherein or interference fits, corresponding drum organization constitutes described anti-rotation structure, in the main body that described axle installing hole is set directly at described rigid mount or be arranged in adjusting sleeve, when being arranged in described adjusting sleeve, the outer rim of described adjusting sleeve is cylindrical, described axle installing hole is arranged on the central authorities of described adjusting sleeve, the main body of described rigid mount is provided with the adjusting sleeve installing hole corresponding with described adjusting sleeve outer rim, described adjusting sleeve is plugged on described adjusting sleeve installing hole, with described adjusting sleeve installing hole interference fits or interference fit, and be provided with or be not provided with fastening bolt,

Rigid mount five: the axle installing hole on described rigid mount is splined hole, the described central shaft shaft part of connected respective end is splined shaft, and the above-mentioned spline structure adopted between the two constitutes described anti-rotation structure.

8. as claim 1, ultra-low speed big torsional moment motor described in 2 or 3, it is characterized in that the real time temperature gathered by described stator temperature transducer in stator, the fatigue state of motor is judged according to the real time temperature in the described stator collected, set the working temperature higher limit corresponding with the temperature acquisition position of described stator temperature transducer, when the temperature that corresponding stator temperature transducer collects meets or exceeds corresponding working temperature higher limit, be judged as that motor is tired also to judge according to this to control to shut down, when collected temperature is lower than corresponding working temperature higher limit, be judged as that motor is tired and allow motor to carry out work.

9. ultra-low speed big torsional moment motor as claimed in claim 8, it is characterized in that being provided with the current signal collection device for obtaining current of electric online and/or the voltage signal acquisition device for obtaining electric moter voltage online, described current signal collection device is the current sensor of current input signal for gathering stator winding and/or the frequency converter for exporting its current output signal, described voltage signal acquisition device is the voltage sensor of voltage input signal for gathering stator winding and/or the frequency converter for exporting its voltage output signal, current signal is obtained by current signal collection device, with described current signal for load transducing signal or calculated by described current signal and obtain payload data, voltage signal is obtained by described voltage signal acquisition device, the transducing signal being rotary speed with described voltage signal or calculated by described voltage signal and obtain rotary speed data.

10. a crane, it is characterized in that comprising the ultra-low speed big torsional moment motor as in claim 1-9 as described in any one claim, the urceolus of described ultra-low speed big torsional moment motor is used as the reel of the lifting mechanism of described crane, for connecting and the steel wire rope of the described lifting mechanism that reels.