CN115664157A - High-precision permanent magnet speed regulator - Google Patents

Abstract

The invention discloses a high-precision permanent magnet speed regulator, which can transmit the kinetic energy output by a prime motor to a load device and can regulate the rotating speed of the load device at the same time, and the high-precision permanent magnet speed regulator comprises: the device comprises a rotating speed adjusting mechanism, a magnetic coupling mechanism and a synchronizing mechanism, wherein the rotating speed adjusting mechanism is arranged on a transmission shaft, and one end of the transmission shaft is connected with a prime motor; the magnetic coupling mechanism is arranged on the transmission shaft and comprises two vortex disc assemblies and two magnet disc assemblies which are symmetrically arranged, and the other end of the transmission shaft is connected with an input shaft of the load equipment; the synchronous mechanism is arranged on the transmission shaft and connected with the two magnetic disc assemblies; the rotating speed adjusting mechanism drives one magnet disc assembly to move close to or away from the vortex disc assembly in the axial direction, and meanwhile, the synchronizing mechanism drives the other magnet disc assembly to move close to or away from the other vortex disc assembly in the axial direction synchronously so as to adjust the output rotating speed of the high-precision permanent magnet speed regulator.

Description

High-precision permanent magnet speed regulator

Technical Field

The invention relates to the technical field of permanent magnet transmission, in particular to a permanent magnet speed regulator which adjusts the air gap of a magnetic coupling mechanism by matching a gear, a threaded sleeve and a sliding sleeve structure with a rotating speed and a position sensor so as to achieve the purpose of adjusting the transmission power of a coupler with high precision and further adjust the output rotating speed.

Background

The permanent magnet transmission technology is a novel transmission technology for transmitting mechanical power through magnetic field coupling, and compared with a traditional transmission mode, the permanent magnet transmission technology can enable a driving shaft and a driven shaft of mechanical equipment to be free of mechanical connection, effectively isolates high-frequency vibration and noise, reduces adverse effects of load disturbance on work of a motor, and improves the operating efficiency of the whole power system.

Fan-shaped permanent magnets are uniformly distributed on the circumference of a magnet disc of the permanent magnet coupling, the magnetic pole directions of the adjacent permanent magnets are opposite, a magnetic conduction disc is installed on one side of the magnet disc and is made of a material with lower magnetic resistance, a conductive disc is installed on the other side of the magnet disc and is made of a material with lower resistivity, and the magnetic conduction disc is also installed on the back of the conductive disc. One of the magnetic disk and the conductive disk is connected with the driving shaft, the other one of the magnetic disk and the conductive disk is connected with the driven shaft, and the magnetic disk and the conductive disk are not mechanically connected and are separated by a certain distance to form an air gap.

When the distance between the magnet disc and the conductive disc is close, most magnetic induction lines are emitted from the N level of the permanent magnet, pass through the air gap and the conductive disc, flow to the corresponding area of the S level magnet along the magnetic conductive disc arranged on the back of the conductive disc, pass through the conductive disc and the air gap again, and flow back to the S level of the adjacent permanent magnet. When the magnet disc and the conductive disc move relatively, magnetic flux passing through the conductive disc moves at the same speed, so that induced electromotive force is generated on the conductive disc, and then induced eddy current is generated. The induced eddy current generates an induced magnetic field, which is coupled with the magnetic field of the permanent magnet, so that power is transferred, and along with the increase of the distance between the magnet disc and the conductive disc, more and more magnetic induction lines do not pass through the conductive disc any more, a magnetic loop is directly formed in an air gap, so that the magnetic flux on the conductive disc is reduced, and the transmission power of the permanent magnet coupler is reduced. Therefore, the power transmission capacity of the permanent magnet coupling can be controlled by controlling the size of the air gap between the magnet disc and the conductive disc.

The permanent magnet speed regulator pushes the magnet disc to move axially through the regulating mechanism, and then the size of the air gap between the magnet disc and the conductive disc is regulated. The current speed regulator realizes the function through the structure that the inside and outside double sleeves combine the helicla flute, and this structural design is comparatively simple, nevertheless has the adjustment precision not high, damaged, need high-power executive motor scheduling problem:

1. the adjustment precision is not high

The transmission power of the permanent magnet coupler can be greatly changed due to a small change of the air gap, so that the adjustment precision of the air gap is in millimeter level. In the structure of inside and outside double sleeve + helicla flute, in order to guarantee interior sliding sleeve structural strength, the pitch of helicla flute is very big, generally at centimetre level, and outer sliding sleeve is a little rotation angle and will make the air gap change by a wide margin, and then leads to permanent magnet coupling's transmission power to change by a wide margin, so this structural adjustment precision is not high.

2. Is easy to be damaged

The magnetic disk of the permanent magnet speed regulator and the magnetic conductive disk behind the conductive disk always have strong attraction, when the air gap is at the minimum position, the attraction can reach several tons, at this moment, if the air gap needs to be adjusted, the adjusting mechanism needs to overcome the attraction between the magnetic disk and the conductive disk, and then the two sides are pushed away, therefore, the requirement of the adjusting mechanism on the mechanical strength is higher. In the structure of the inner sleeve, the outer sleeve and the spiral groove, the guide post on the outer sliding sleeve is matched with the inclined plane of the spiral groove of the inner sliding sleeve to bear the attraction of the magnet disc and the conductive disc, but the combined surface of the guide post and the inclined plane is small, so that the stress is concentrated, and the guide post or the spiral groove of the inner sliding sleeve is easy to damage.

3. Need high-power executive motor

The structure that inside and outside double tube combines the helicla flute only converts horizontal displacement into the rotary displacement of outer sliding sleeve, does not design effectual speed reduction and increases turns round the mechanism, so need the structure to dispose the great actuating motor of power, leads to permanent magnet speed regulator volume great, receives the restriction when narrow and small space installation.

Therefore, it is desirable to develop a high precision permanent magnet governor that overcomes the above-mentioned drawbacks.

Disclosure of Invention

In view of the above problems, the present invention provides a high-precision permanent magnet speed governor capable of adjusting a rotational speed of a load device while transmitting kinetic energy output from a prime mover to the load device, the high-precision permanent magnet speed governor comprising:

the rotating speed adjusting mechanism is arranged on the transmission shaft, and one end of the transmission shaft is connected with the prime motor;

the magnetic coupling mechanism is arranged on the transmission shaft and comprises two vortex disc assemblies and two magnet disc assemblies which are symmetrically arranged, the two vortex disc assemblies and the two magnet disc assemblies are sleeved on the transmission shaft, the two magnet disc assemblies are positioned between the two vortex disc assemblies, and the vortex disc assembly close to the load equipment is connected to an input shaft of the load equipment through an output shaft sleeved at the other end of the transmission shaft;

the synchronous mechanism is arranged on the transmission shaft and is connected with the two magnet disc assemblies;

during adjustment, the rotating speed adjusting mechanism drives one magnet disc assembly to move close to or away from the vortex disc assembly in the axial direction, and meanwhile, the synchronizing mechanism drives the other magnet disc assembly to move close to or away from the other vortex disc assembly in the axial direction synchronously so as to adjust the output rotating speed of the high-precision permanent magnet speed regulator.

The aforesaid high accuracy permanent magnet speed regulator, wherein, speed adjustment mechanism includes:

the transmission shaft is fixedly arranged in the bearing hole in a penetrating mode, a first bearing and a second bearing which are abutted against each other are sleeved on the transmission shaft, the first bearing and the second bearing are located in the bearing hole, and a third bearing is further sleeved on the transmission shaft;

an inner sliding sleeve sleeved on the third bearing,

the middle sliding sleeve is sleeved outside the inner sliding sleeve and is connected with the inner sliding sleeve through a guide key;

the outer sleeve is sleeved on the middle sliding sleeve and is in threaded connection with the middle sliding sleeve;

the magnet connecting sleeve is sleeved on the transmission shaft and is connected to the outer thread sleeve through a transition connecting disc, the magnet connecting sleeve is connected to the magnet disc assembly through a fourth bearing, and the mounting direction of the third bearing is the direction of attraction force generated by the magnet disc assembly and the vortex disc assembly;

the executing motor is arranged on the base and is connected to the inner sliding sleeve through a gear assembly;

wherein, the drive actuating motor passes through the gear assembly drives outer cover synchronous revolution, outer cover drives well sliding sleeve is in endwise slip is gone up to interior sliding sleeve, interior sliding sleeve drives magnet connecting sleeve endwise slip, and then drives one magnet disc subassembly endwise slip, pass through during magnet disc subassembly endwise slip synchronizing mechanism drives another magnet disc subassembly endwise slip.

The above-mentioned high accuracy permanent magnet speed regulator, wherein, the gear assembly includes:

the gear sleeve is sleeved on the inner sliding sleeve;

the first gear is sleeved on the gear sleeve and is connected to the side surface of the outer sleeve through a screw;

the second gear is sleeved on the execution shaft of the execution motor and connected to the first gear;

the gear retainer ring is sleeved on the gear sleeve, is positioned between the middle sliding sleeve and the first gear, and limits the axial movement of the first gear through the gear retainer ring and the gear sleeve;

the actuating motor drives the second gear to drive the first gear to rotate.

In the high-precision permanent magnet speed regulator, the outer side surface of the inner sliding sleeve is provided with a containing groove, the rotating speed regulating mechanism further comprises a guide key, the guide key is arranged in the containing groove, the inner side surface of the middle sliding sleeve is provided with a guide groove, and the guide key is matched with the guide groove, so that the middle sliding sleeve can only axially slide on the inner sliding sleeve.

The above-mentioned high accuracy permanent magnet speed regulator, wherein, the lazytongs includes:

the triangular frame is sleeved on the transmission shaft, the key groove is connected with the transmission shaft, and the triangular frame and the magnet disc assembly rotate synchronously;

the polish rod correspondingly penetrates through the end part of the tripod, two ends of the polish rod are respectively connected with the two magnet disc assemblies, and the magnet disc assemblies can axially slide on the polish rod;

the two ends of the lever assembly are respectively connected to the two magnet disc assemblies, and the middle part of the lever assembly is connected to the edge part of the tripod;

when one magnet disc assembly is pushed to move by the axial thrust of the magnet connecting sleeve, the magnet disc assembly pushes the lever assembly to rotate so as to drive the other magnet disc assembly to synchronously and axially slide.

The above-mentioned high accuracy permanent magnet speed regulator, wherein, the lever assembly includes:

two lever slide rails respectively arranged on the two magnet disc assemblies, wherein the lever slide rails are provided with sliding grooves,

the two ends of the synchronous lever are respectively arranged in the two sliding grooves and can slide in the sliding grooves;

the lever shaft is arranged in the middle of the synchronous lever and connected to the protruding block on the edge part;

and one magnet disc assembly drives the synchronous lever to slide in the sliding groove so as to drive the other magnet disc assembly to synchronously and axially slide.

The high-precision permanent magnet speed regulator further comprises a monitoring control mechanism, wherein the monitoring control mechanism comprises:

an input rotation speed monitoring unit that monitors an input rotation speed of the prime mover;

an output rotation speed monitoring unit that monitors an actual rotation speed of the load device;

and the control unit compares the actual rotating speed with a standard rotating speed, and controls the rotating speed adjusting mechanism to adjust the rotating speed when the actual rotating speed is deviated from the standard rotating speed.

The high-precision permanent magnet speed regulator further comprises a monitoring control mechanism, and the input rotating speed monitoring unit comprises: the device comprises an input rotating speed sensor and a rotating speed sensing disc, wherein the input rotating speed sensor detects the rotating speed sensing disc to obtain the input rotating speed, and the output rotating speed monitoring unit obtains the actual rotating speed by detecting the magnetic coupling mechanism.

The high-precision permanent magnet speed regulator further comprises:

the position coding unit monitors the number of rotation turns and the rotation angle of the actuating motor to obtain the size of an air gap between the magnet disc assembly and the eddy current disc assembly and outputs the size to the control unit;

the temperature monitoring unit is used for monitoring the working temperature of the magnetic coupling mechanism;

the control unit can also control the rotating speed adjusting mechanism to adjust according to the size of the air gap and/or the working temperature.

In the above high-precision permanent magnet speed regulator, the magnetic coupling mechanism further includes a limiting component sleeved on the transmission shaft and abutting against the tripod, and the other magnet disc component is sleeved and connected to the limiting component, and the limiting component is used for limiting the axial movement of the tripod.

Compared with the prior art, the invention has the following effects:

(1) the adjusting mechanism is designed to be a mode of combining a threaded sleeve, a sliding sleeve and a gear, the thread pitch of the threaded sleeve is reduced, the air gap control precision is improved to a millimeter level, meanwhile, the speed reduction and torque increase are realized through the gear transformation ratio, and the capacity and the volume of an actuating motor are reduced;

(2) the adjusting mechanism is provided with a rotating speed sensor, a position encoder and a temperature sensor, so that the input and output rotating speeds of the permanent magnet speed regulator can be monitored in real time, the size of an air gap can be accurately measured, the operating temperature and other parameters of the magnetic coupler can be monitored in real time, and the control parameters of the working point of the magnetic coupler can be ensured to be fast and accurate;

(3) the adjusting motor is integrated on the base of the adjusting mechanism, and parts of the adjusting mechanism are integrated together in a three-layer sliding sleeve and threaded sleeve mode, so that the size of the adjusting mechanism is reduced, and meanwhile, the adjusting mechanism has a good sealing effect, is dustproof and moistureproof and improves the operation reliability of the adjusting mechanism;

(4) the gear is lubricated in an oil immersion manner, and the thread sleeve, the sliding sleeve and the bearing are lubricated by grease, so that the mechanical abrasion of the adjusting mechanism is reduced, and the operation reliability of the adjusting mechanism is improved;

(5) the input side of the permanent magnet speed regulator uses a support of an adjusting mechanism as a support, the output side utilizes a shaft of load equipment to provide support in a bearing mode, and both sides are provided with supporting points, so that the suspension effect caused by that parts of the permanent magnet speed regulator are only supported on one side is avoided, and the damage of parts of the permanent magnet speed regulator to the shaft and the bearing of a motor or the load equipment due to the weight is further reduced;

(6) the structure of the permanent magnet speed regulator is optimally designed for molding, the input side and the output side can be exchanged according to the field work requirement, and the work of the permanent magnet speed regulator is not influenced.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a block diagram of the high precision permanent magnet governor of the present invention;

FIG. 2 is a schematic structural view of the high precision permanent magnet governor of the present invention;

FIG. 3 is a cross-sectional view of the high precision permanent magnet governor of the present invention;

FIG. 4 is a cross-sectional view of a rotational speed adjustment mechanism;

FIG. 5 is a schematic structural view of a base;

FIG. 6 is a cross-sectional view of the synchronization mechanism;

FIG. 7 is a schematic view of a portion of the synchronization mechanism;

FIG. 8 is a schematic view of the connection of the tripod, the polish rod and the lever assembly;

FIG. 9 is a schematic view of the monitoring and control mechanism;

FIG. 10 is a timing chart of the output pulse signal of the input tachometer sensor;

FIG. 11 is a schematic structural view of a magnetic coupling mechanism;

FIG. 12 is an exploded view of the inner sleeve and the middle sleeve;

fig. 13 is a schematic structural diagram of another embodiment of the high-precision permanent magnet governor of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.

As used herein, "first," "second," "S1," "S2," …, etc., are not specifically meant to be sequential or in-order, nor are they meant to be limiting, but merely to distinguish between elements or operations described in the same technical language.

With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.

As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.

As used herein, "and/or" includes any and all combinations of the described items.

References to "plurality" herein include "two" and "more than two"; reference to "multiple sets" herein includes "two sets" and "more than two sets".

Certain words used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.

Referring to fig. 1-3, fig. 1 is a block diagram of a high-precision permanent magnet governor according to the present invention; FIG. 2 is a schematic structural view of the high precision permanent magnet governor of the present invention; fig. 3 is a cross-sectional view of the high precision permanent magnet governor of the present invention. As shown in fig. 1 to 3, a high-precision permanent magnet speed governor according to the present invention is capable of adjusting a rotational speed of a load device while transmitting kinetic energy output from a prime mover to the load device, and includes: the device comprises a rotating speed adjusting mechanism 1, a magnetic coupling mechanism 2 and a synchronizing mechanism 3, wherein the rotating speed adjusting mechanism 1 is arranged on a transmission shaft 6, and one end of the transmission shaft 6 is connected with the prime motor; the magnetic coupling mechanism 3 is installed on the transmission shaft 6, the magnetic coupling mechanism 2 includes two vortex disk assemblies 211 and 212 and two magnet disk assemblies 221 and 222 which are symmetrically arranged, the two vortex disk assemblies 211 and 212 and the two magnet disk assemblies 221 and 222 are sleeved on the transmission shaft, the two magnet disk assemblies 221 and 222 are located between the two vortex disk assemblies 211 and 212, and the vortex disk assembly 212 close to the load equipment is connected to an input shaft of the load equipment through an output shaft 5 sleeved at the other end of the transmission shaft 6; the synchronizing mechanism 3 is mounted on the transmission shaft 6 and connected to the two magnet disc assemblies 221 and 222; during adjustment, the rotating speed adjusting mechanism 1 drives one magnet disc assembly 221 to move axially closer to or away from the vortex disc assembly 211, and the synchronizing mechanism 3 drives the other magnet disc assembly 222 to move axially synchronously closer to or away from the vortex disc assembly 212, so as to adjust the output rotating speed of the high-precision permanent magnet speed regulator, and further adjust the rotating speed of the load device.

Referring to fig. 4-5, fig. 4 is a sectional view of the rotation speed adjusting mechanism; fig. 5 is a schematic structural view of the base. As shown in fig. 4-5, and with reference to fig. 1-3, the rotation speed adjustment mechanism 1 includes: the magnetic coupling device comprises a base 11, an inner sliding sleeve 12, a middle sliding sleeve 13, an outer sliding sleeve 14, a magnet connecting sleeve 15 and an executing motor 16, wherein the base 11 is provided with a bearing hole K1, a transmission shaft 6 is fixedly arranged in the bearing hole 1 in a penetrating manner, a first bearing Z1 and a second bearing Z2 which are mutually abutted are sleeved on the transmission shaft 6, and the first bearing Z1 and the second bearing Z2 are positioned in the bearing hole 1; a third bearing Z3 is further sleeved on the transmission shaft 6, and an inner sliding sleeve 12 is sleeved on the third bearing Z3; the middle sliding sleeve 13 is sleeved outside the inner sliding sleeve 12 and is connected to the inner sliding sleeve 12 through a guide key 131; the outer sleeve 14 is sleeved on the middle sliding sleeve 13 and is in threaded connection with the middle sliding sleeve 13; the magnet connecting sleeve 15 is sleeved on the transmission shaft 6 and connected to the outer jacket 14 through a transition connecting disc 17, the magnet connecting sleeve 15 is connected to a magnet disc assembly 221 through a third bearing Z3, and the installation direction of the fourth bearing Z4 is the direction in which the magnet disc assembly 221 and the vortex disc assembly 211 generate attraction force; the execution motor 16 is arranged on the base 11 and is connected with the inner sliding sleeve 12 through a gear assembly 18; it should be noted that, in the present invention, the synchronizing mechanism 3 is used to enable the two magnet disc assemblies 221, 222 to simultaneously approach or separate from the two vortex disc assemblies 211, 212 in the axial direction, that is, when the magnet disc assembly 221 approaches the vortex disc assembly 211, the magnet disc assembly 222 simultaneously approaches the vortex disc assembly 212, and when the magnet disc assembly 221 separates from the vortex disc assembly 211, the magnet disc assembly 222 simultaneously separates from the vortex disc assembly 212.

Wherein the gear assembly comprises: gear sleeve 181, first gear 182, second gear 183, and gear retainer 18; the gear sleeve 181 is sleeved on the inner sliding sleeve 12; the first gear 182 is sleeved on the gear sleeve 181 and is connected to the side surface of the outer sleeve 14 through a screw; the second gear 183 is sleeved on the actuating shaft of the actuating motor 16 and connected to the first gear 182; the gear retainer 184 is sleeved on the gear sleeve 181 and located between the middle sliding sleeve 13 and the first gear 182, and the axial movement of the first gear 182 is limited by the gear retainer 184 and the gear sleeve 181; the actuating motor 16 drives the second gear 183 to drive the first gear 182 to rotate, and the first gear 182 drives the outer thread 14 to rotate synchronously.

Specifically, the base 11 provides a supporting function for the permanent magnet speed regulator, a foundation bolt hole K2 is formed in a bottom plate of the base 11 and used for being connected and fixed with a foundation of an equipment site, and a mounting bolt L is arranged on the base 11; a first bearing Z1 and a second bearing Z2 are arranged on the transmission shaft 6 back to back, wherein the first bearing Z1 and the second bearing Z2 are two-disc angular contact bearings, are fixed in a bearing hole K1 of the base through a base bearing cover 19 and an inner sliding sleeve 12, and simultaneously avoid axial movement, the inner sliding sleeve 12 is matched with the middle part of the transmission shaft 6 through a third bearing Z3 to provide supporting force for the transmission shaft and avoid the suspension of the transmission shaft, and the third bearing Z3 is a cylindrical roller bearing; and one side of the third bearing Z3 is provided with a framework oil seal F.

Referring to fig. 12, fig. 12 is an exploded view of the inner sliding sleeve and the middle sliding sleeve. The inner sliding sleeve 12 is screwed with the base 11 through a positioning spigot on a mounting flange surface 121 thereof, and provides support for the middle sliding sleeve 13 and the outer sliding sleeve 14. A gear sleeve 181 is installed on the outer cylindrical surface of the inner sliding sleeve 12 near the root of the flange, and a gear retainer 184 is installed on the left side of the gear sleeve 181 and is used for providing rotary support for the first gear 182 and limiting the axial movement of the first gear 182. The inner sliding sleeve 12 is provided with a containing groove 122 near the end for installing a guide key 131, the inner side surface of the middle sliding sleeve 13 is provided with a guide groove 132, and the guide key 131 is matched with the guide groove 132 of the inner hole of the middle sliding sleeve 13, so that the middle sliding sleeve 13 can only axially slide on the inner sliding sleeve 12 and cannot rotate;

the inner hole of the middle sliding sleeve 13 is matched with the outer cylindrical surface of the inner sliding sleeve 12 to keep concentric, the inner sliding sleeve 12 moves axially, and the middle sliding sleeve 13 is prevented from rotating through the limiting function of the guide key 131; the outer side of the middle sliding sleeve 13 is provided with trapezoidal threads which are matched with the outer sleeve 14, and when the outer sleeve 14 rotates, the middle sliding sleeve 13 can be forced to move axially. In the embodiment, a copper guide ring 133 is installed at the spigot step position at the end of the other side of the middle sliding sleeve 13, and is in internal control fit with the outer sleeve 14 to play a role in sealing and guiding;

the inner hole of the outer screw 14 is processed with trapezoidal thread to match with the middle sliding sleeve 13, one side of the outer screw 14 is connected with the first gear 182 through a bolt, when the first gear 182 rotates, the outer screw 14 can be driven to rotate. In this embodiment, the external thread bushing 14 is further provided with a straight-through type plunger oil cup capable of adding grease into the cavity to reduce frictional resistance of the thread matching surface, and the external thread bushing 14 is provided with a mounting bolt L;

the magnet connecting sleeve 15 is connected with the middle sliding sleeve 13 through the transition connecting disc 17, when the first gear 182 rotates, the outer sleeve 14 is driven to rotate synchronously, and the middle sliding sleeve 13 is driven to slide axially through the threaded matching of the outer sleeve 14 and the middle sliding sleeve 13, so that the magnet connecting sleeve 15 is driven to slide axially. In the present embodiment, the magnet connecting sleeve 15 is provided with a bearing washer 151 and a bearing retainer 152 for fixing a fourth bearing Z4 on the magnet disc assembly 221 in the magnetic coupling mechanism 2, wherein in the present embodiment, the magnet connecting sleeve 15 is a tapered roller bearing, and when the magnet connecting sleeve 15 slides axially, the tapered roller bearing can drive the magnet disc assembly 221 to slide axially synchronously;

the actuator motor 16 is a hollow shaft motor, and when the actuator motor 16 rotates, the actuator shaft 161 can be driven to rotate. The second gear 183 is mounted on the actuating shaft 161, a flat key 1611 is mounted between the actuating shaft 161 and an inner hole of the second gear 183, when the actuating shaft 161 rotates, the second gear 183 can be driven to rotate synchronously through the flat key 1611, a copper shaft sleeve 162 is further sleeved on the actuating shaft 161, and the copper shaft sleeve 162 is located in a shaft hole K3 of the base 11 to rotate the auxiliary actuating shaft 161 and protect the actuating shaft 161.

In the present invention, the actuator motor 1200 is used in combination with the first gear 182 and the second gear 183 to form a one-stage speed reduction mechanism, and the first gear 182 is used in combination with the gear sleeve 181 to form a one-stage speed reduction mechanism, so that the speed adjustment mechanism has two stages of speed reduction mechanisms in total, and the speed reduction ratio is large. An ordinary motor without positioning accuracy can be used as an executing motor, an angle error or even a circle number error exists in a motor stopping positioning point in time, and after the motor stopping positioning point is reduced by the two-stage speed reducing mechanism, an axial displacement error transmitted to the magnet connecting sleeve 15 is very small and negligible. On the contrary, even if a driving motor with lower power is used, a larger execution torque can be obtained through the speed reduction and torque increase action of the two-stage speed reduction mechanism, and the huge attractive force action between the magnet rotor part and the eddy current rotor part is overcome. The rotating speed adjusting mechanism designed by the invention can greatly reduce the development difficulty of a control system and improve the overall operation reliability of the magnetic speed regulator.

Referring to fig. 6-8, fig. 6 is a sectional view of the synchronization mechanism, fig. 7 is a schematic structural view of a portion of the synchronization mechanism, and fig. 8 is a schematic connection view of a portion of the tripod, the polish rod and the lever assembly. As shown in fig. 6-8, and in conjunction with fig. 1-3, the synchronization mechanism 3 includes: the tripod 31, at least one polished rod 32 and at least one lever assembly 33, wherein the tripod 31 is sleeved on the transmission shaft 6 and the key groove is connected to the transmission shaft 6, and the tripod 31 and the magnet disc assembly 221 rotate synchronously; at least one polish rod 32 is correspondingly arranged on the end part 311 of the tripod 31 in a penetrating way, and two ends of the polish rod are respectively connected with the two magnet disc assemblies 221 and 222, and the magnet disc assemblies 221 and 222 can axially slide on the polish rod 32; two ends of at least one lever assembly 33 are respectively connected to the two magnet disc assemblies 221, 222, and the middle part of the lever assembly is connected to the edge 312 of the tripod 31; when one of the magnet disc assemblies 221 is moved by the axial thrust of the magnet connecting sleeve 15, the magnet disc assembly 221 pushes the lever assembly 33 to rotate so as to drive the other magnet disc assembly 22 to synchronously slide axially.

Wherein the lever assembly 33 includes: two lever slide rails 331, a synchronization lever 332, and a lever shaft 333; the two lever slide rails 331 are respectively mounted on the two magnet disc assemblies 221, 222, a chute C1 is formed on the lever slide rails 331, and two ends of the synchronization lever 332 are respectively disposed in the two chutes C1 and can slide in the chutes C1; a lever shaft 333 installed at the middle of the synchronization lever 332 and connected to the protrusion T1 of the side 312; one of the magnet disc assemblies 221 drives the end of the synchronization lever 332 to slide in the chute C1 to drive the other magnet disc assembly 222 to slide axially and synchronously.

Specifically, the inner hole of the tripod 31 is installed in cooperation with the transmission shaft 6, and a tripod flat key 313 is installed on the matching surface to ensure that the motor torque on the transmission shaft can be transmitted to the tripod 31; a polish rod 32 is installed in the outermost hole of the tripod 31 and fixed using a polish rod set screw 321. The polish rod 32 is inserted into the inner bore of the sliding sleeve 322, and the sliding sleeve 322 can slide freely on the polish rod 32. The sliding sleeves 322 are assembled in the mounting holes of the magnet disc assemblies 221 and 222 and are uniformly distributed in the circumferential direction; the cam T1 of three sides 312 of the tripod is equipped with the synchronous lever 332, the synchronous lever 332 is fixed by the lever shaft 333, the end of the synchronous lever 332 is installed in the chute C1 of the lever slide rail 331 and can slide along the chute C1, wherein the chute C1 is a straight line chute; when the magnet disc assembly 221 is pushed by the axial thrust of the magnet connecting sleeve 15, the synchronization lever 332 is pushed to rotate around the lever shaft 333, and the end of the synchronization lever 332 displaces in the chute C1 of the lever slide rail, so as to push the magnet disc assembly 222 to displace in the axial direction.

In this embodiment, the magnet disc assembly 221 includes a magnet disc 221A and a magnetic conductive disc 221B mounted on the magnet disc 221A, the magnet disc assembly 222 includes a magnet disc 222A and a magnetic conductive disc 222B mounted on the magnet disc 222A, and the two lever slide rails 331 of each lever assembly 33 are respectively mounted on the magnet disc 221A and the magnet disc 222A.

In this embodiment, the magnetic coupling mechanism 2 further includes a limiting component, which is sleeved on the transmission shaft 6 and abuts against the tripod 31, the other magnetic disc component 222 is sleeved on and connected to the limiting component, the limiting component is used for limiting the axial movement of the tripod 31, wherein the limiting component includes a shaft sleeve 231 and a sliding shaft sleeve 232, the shaft sleeve 231 is installed on the transmission shaft 6 on the right side of the tripod 31, and the sliding shaft sleeve 232 is fixed on the transmission shaft 6 through a lock nut 233 to fix the tripod 31 and prevent the tripod 31 from axially sliding on the transmission shaft 6.

Referring to fig. 9, fig. 9 is a schematic structural diagram of the monitoring control mechanism. As shown in fig. 9 and with reference to fig. 1 to 3, the high-precision permanent magnet speed regulator further includes a monitoring control mechanism 4, where the monitoring control mechanism 4 includes: an input rotation speed monitoring unit 41, an output rotation speed monitoring unit 42, and a control unit 43; an input rotation speed monitoring unit 41 monitors the input rotation speed of the prime mover; the output rotational speed monitoring unit 42 monitors the actual rotational speed of the load device; the control unit 43 compares the actual rotation speed with a standard rotation speed, and when the actual rotation speed deviates from the standard rotation speed, the control unit 43 controls the rotation speed adjusting mechanism to adjust the rotation speed.

Further, the high accuracy permanent magnet speed regulator still includes: a position encoding unit 44 and a temperature monitoring unit 45; the position coding unit 44 monitors the number of rotations and the rotation angle of the actuator motor 16 to obtain the size of the air gap H between the magnet disc assembly 221 and the vortex disc assembly 211 and between the magnet disc assembly 222 and the vortex disc assembly 212 and outputs the size to the control unit; the temperature monitoring unit 45 monitors the operating temperature of the magnetic coupling mechanism 2; the control unit 43 may also control the rotation speed adjusting mechanism 1 to adjust according to the size of the air gap and/or the working temperature.

Specifically, the input rotation speed monitoring unit 41 includes an input rotation speed sensor 411 and a rotation speed sensing disc 412, the input rotation speed sensor 411 is installed on the base 11, the rotation speed sensing disc 412 is installed on the transmission shaft 6, and the input rotation speed sensor 411 can output high and low level pulses by detecting the rotation speed sensing disc 412, so as to calculate the input rotation speed of the permanent magnet speed regulator; wherein, the gap on the outer circumference of the rotating speed induction disc 412 is specially designed, and the positive and negative rotation directions of the permanent magnet speed regulator can be judged by detecting the pulse time sequence signal output by the output rotating speed sensor, which is detailed in figure 10; the output rotation speed monitoring unit 42 is an output rotation speed sensor, the output rotation speed sensor is installed on the base 11 through a sensor bracket 46, in another embodiment of the present invention, the output rotation speed sensor can also be installed on the protective cover 111 of the base 11, the output rotation speed sensor can output high and low level pulse signals through detecting screws on the magnetic coupling mechanism 2, and then calculate the output rotation speed; the position coding unit 44 is a position encoder which is installed on one side of the actuating shaft 161 and can detect the number of rotations and the rotation angle of the actuating motor, and the size of the air gap between the magnet disc assembly and the vortex disc assembly can be determined through calculation; the temperature monitoring unit 45 is a temperature sensor, which is mounted on the base 11 through a sensor bracket 46, and in another embodiment of the present invention, the temperature sensor is also mounted on the protective cover 111, and the temperature sensor is an infrared non-contact temperature sensor, which can output an analog electrical signal by detecting the surface temperature of the magnetic coupling mechanism 2, and further measure the working temperature of the magnetic coupling mechanism.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a magnetic coupling mechanism. As shown in fig. 11, and in conjunction with fig. 1-3, the magnetic coupling mechanism includes: the vortex disc assemblies 211 and 212, the magnet disc assemblies 221 and 222 and the limiting assembly, the vortex disc assemblies 211 and 212 are connected through the connecting tile 23, the magnet disc assembly 221 is connected with the magnet connecting sleeve 15 through a fourth bearing Z4 tapered roller bearing, wherein the fourth bearing Z4 is a tapered roller bearing as a preferred embodiment, when the magnet connecting sleeve 15 moves axially, the magnet disc assembly 221 can be forced to approach or depart from the vortex disc assembly 211. Because a bearing connection mode is adopted, the rotation motion of the magnet disc assembly 221 cannot generate torsional force on the magnet connecting sleeve 15, meanwhile, the installation direction of the tapered roller bearing is the direction of attraction force generated by the magnet disc assembly 221 and the vortex disc assembly 211, the tapered roller bearing is used for resisting the tendency that the magnet disc assembly 221 continuously approaches the vortex disc assembly 211 and preventing disc wiping faults, and the magnet disc assemblies 221 and 222 ensure synchronous motion through the synchronous mechanism 3, so that the sizes of air gaps on two sides are ensured to be consistent; magnet disc subassembly 222 is located through the cover an output shaft 5 of the other end of transmission shaft 6 passes through screwed connection, wherein is connected with transmission shaft 6 through fifth bearing Z5 in the output shaft 5 hole, and then provides both sides to the heavy burden on transmission shaft 6 and support, prevents that suspended structure from appearing in transmission shaft 6, improves structural stability, and the supporting mechanism of both sides is the input shaft of base 11 and load equipment respectively.

The operation of the present invention will be specifically described below:

1. prime mover power transfer process

The prime mover is connected with a transmission shaft 6 of the permanent magnet speed regulator, the rotating mechanical energy is transmitted to the transmission shaft 6 through a flat key 1611 on the left side of the transmission shaft 6, then transmitted to the tripod 31 through a tripod flat key 313, further transmitted to the polished rod 312, and then transmitted to the magnet disc assembly through the sliding sleeve 15, the magnet disc assembly is coupled with the eddy current disc assembly through a magnetic field, so that the transmission of the rotating mechanical energy is realized, and finally the rotating mechanical energy is transmitted to load equipment through an output shaft 5.

2. Actuator adjustment process

The actuating motor 16 rotates clockwise to drive the actuating shaft 161 to rotate, and further drive the second gear 183 to rotate, the second gear 183 drives the first gear 182 to rotate counterclockwise, the first gear 182 and the outer thread 14 are connected into a whole through a bolt, and therefore the outer thread 14 is driven by the first gear 182 to rotate counterclockwise synchronously. The outer sleeve 14 is matched with the middle sliding sleeve 13 through trapezoidal threads, the counterclockwise rotation of the outer sleeve 14 forces the middle sliding sleeve 13 to move axially to the right, and the inner sliding sleeve 12 and the guide key 131 limit the rotation of the middle sliding sleeve 13 and only perform axial linear movement. The middle sliding sleeve 13 drives the transition connecting disc 17 and the magnet connecting sleeve 15 to move axially rightwards synchronously, and then drives the magnet disc assembly to be far away from the vortex disc assembly, so that the air gap is continuously increased, the coupling strength of the magnetic coupling mechanism is continuously weakened, the power transmission quantity of a prime motor is reduced, and the rotating speed of load equipment is reduced. On the contrary, when the execution motor rotates anticlockwise, the magnet disc assembly is close to the vortex disc assembly, so that the air gap is continuously reduced, the coupling strength of the magnetic coupling mechanism is continuously enhanced, the power transmission quantity of the prime motor is enhanced, and the rotating speed of the load equipment is improved.

3. Physical quantity monitoring

The method comprises the steps that a rotation speed sensor is input to monitor the rotation speed of a prime motor constantly, data are provided for internal operation of a control system of the magnetic speed regulator, the rotation speed sensor is output to monitor the actual rotation speed of load equipment constantly, when the actual rotation speed is deviated from set data, the control system commands an actuating mechanism to act, an air gap is increased or decreased, the coupling strength of a magnetic coupling mechanism is adjusted, and the actual working rotation speed of the load equipment is adjusted;

it should be noted that the input side and the output side of the permanent magnet speed regulator can be interchanged according to the field requirements, and after the interchange, the rotating speed detected by the input rotating speed sensor is the output rotating speed, and the rotating speed detected by the output rotating speed sensor is the input rotating speed.

The position encoder is used for detecting the number of rotation turns and the rotation angle of the actuating motor, the size of an air gap between the magnet disc and the conductive disc can be determined through calculation, and in addition, virtual limit can be set to prevent the magnet rotor and the eddy current rotor from generating disc-wiping faults;

the temperature sensor is used for detecting the surface temperature of the magnetic coupling mechanism, when the abnormal condition of overhigh temperature occurs, the control system can send an alarm signal to a central control room of the equipment, automatic or manual, remote or field control actions are realized through internal logic, and the load, the rotating speed and even shutdown actions can be reduced.

Referring to fig. 13, fig. 13 is a schematic structural diagram of another embodiment of the high-precision permanent magnet speed regulator of the present invention. The high-precision permanent magnet speed regulator shown in fig. 13 further includes two protection covers 111, and the two protection covers 111 are oppositely disposed on the base 11.

In summary, the invention has the following advantages: the invention improves the air gap control precision to millimeter level, realizes speed reduction and torque increase through gear transformation ratio, and reduces the capacity and volume of the actuating motor; meanwhile, parameters such as the operating temperature of the magnetic coupler are monitored in real time, and the control parameters of the working point of the magnetic coupler are ensured to be rapid and accurate; moreover, the input side and the output side can be exchanged according to the field work requirement, and the work of the permanent magnet speed regulator is not influenced.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A high-accuracy permanent magnet speed governor capable of adjusting a rotational speed of a load device while transmitting kinetic energy output from a prime mover to the load device, comprising:

the rotating speed adjusting mechanism is arranged on the transmission shaft, and one end of the transmission shaft is connected with the prime motor;

the magnetic coupling mechanism is arranged on the transmission shaft and comprises two vortex disc assemblies and two magnet disc assemblies which are symmetrically arranged, the two vortex disc assemblies and the two magnet disc assemblies are sleeved on the transmission shaft, the two magnet disc assemblies are positioned between the two vortex disc assemblies, and the vortex disc assembly close to the load equipment is connected to an input shaft of the load equipment through an output shaft sleeved at the other end of the transmission shaft;

the synchronous mechanism is arranged on the transmission shaft and is connected with the two magnet disc assemblies;

during adjustment, the rotating speed adjusting mechanism drives one magnet disc assembly to move close to or away from the vortex disc assembly in the axial direction, and meanwhile, the synchronizing mechanism drives the other magnet disc assembly to move close to or away from the other vortex disc assembly in the axial direction synchronously so as to adjust the output rotating speed of the high-precision permanent magnet speed regulator.

2. The high accuracy permanent magnet governor of claim 1 wherein the rotational speed adjustment mechanism comprises:

the transmission shaft is fixedly arranged in the bearing hole in a penetrating mode, a first bearing and a second bearing which are abutted against each other are sleeved on the transmission shaft, the first bearing and the second bearing are located in the bearing hole, and a third bearing is further sleeved on the transmission shaft;

an inner sliding sleeve sleeved on the third bearing,

the middle sliding sleeve is sleeved outside the inner sliding sleeve and is connected with the inner sliding sleeve through a guide key;

the outer sleeve is sleeved on the middle sliding sleeve and is in threaded connection with the middle sliding sleeve;

the magnet connecting sleeve is sleeved on the transmission shaft and is connected to the outer thread sleeve through a transition connecting disc, the magnet connecting sleeve is connected to the magnet disc assembly through a fourth bearing, and the installation direction of the third bearing is the direction of attraction force generated by the magnet disc assembly and the vortex disc assembly;

the executing motor is arranged on the base and is connected to the inner sliding sleeve through a gear assembly;

wherein, the drive actuating motor passes through the gear assembly drives outer cover synchronous revolution, outer cover drives well sliding sleeve is in endwise slip is gone up to interior sliding sleeve, interior sliding sleeve drives magnet connecting sleeve endwise slip, and then drives one magnet disc subassembly endwise slip, pass through during magnet disc subassembly endwise slip synchronizing mechanism drives another magnet disc subassembly endwise slip.

3. The high accuracy permanent magnet governor of claim 2 wherein the gear assembly includes:

the gear sleeve is sleeved on the inner sliding sleeve;

the first gear is sleeved on the gear sleeve and is connected to the side surface of the outer sleeve through a screw;

the second gear is sleeved on the execution shaft of the execution motor and is connected to the first gear;

the gear retainer ring is sleeved on the gear sleeve, is positioned between the middle sliding sleeve and the first gear, and limits the axial movement of the first gear through the gear retainer ring and the gear sleeve;

the actuating motor drives the second gear to drive the first gear to rotate.

4. The high-precision permanent magnet speed regulator according to claim 2, wherein an accommodating groove is formed in an outer side surface of the inner sliding sleeve, the rotational speed regulating mechanism further comprises a guide key, the guide key is installed in the accommodating groove, a guide groove is formed in an inner side surface of the middle sliding sleeve, and the guide key is matched with the guide groove, so that the middle sliding sleeve can only slide axially on the inner sliding sleeve.

5. The high accuracy permanent magnet governor of claim 2 wherein the synchronization mechanism comprises:

the triangular frame is sleeved on the transmission shaft, the key groove is connected with the transmission shaft, and the triangular frame and the magnet disc assembly rotate synchronously;

the polish rod correspondingly penetrates through the end part of the tripod, two ends of the polish rod are respectively connected with the two magnet disc assemblies, and the magnet disc assemblies can axially slide on the polish rod;

the two ends of the lever assembly are respectively connected to the two magnet disc assemblies, and the middle part of the lever assembly is connected to the edge part of the tripod;

when one magnet disc assembly is pushed to move by the axial thrust of the magnet connecting sleeve, the magnet disc assembly pushes the lever assembly to rotate so as to drive the other magnet disc assembly to synchronously and axially slide.

6. The high accuracy permanent magnet governor of claim 5, wherein the lever assembly comprises:

two lever slide rails respectively arranged on the two magnet disc assemblies, wherein the lever slide rails are provided with sliding grooves,

the two ends of the synchronous lever are respectively arranged in the two sliding grooves and can slide in the sliding grooves;

the lever shaft is arranged in the middle of the synchronous lever and connected to the protruding block on the edge part;

and one magnet disc assembly drives the synchronous lever to slide in the sliding groove so as to drive the other magnet disc assembly to synchronously and axially slide.

7. The high accuracy permanent magnet governor of claim 2 and further comprising a supervisory control mechanism, the supervisory control mechanism comprising:

an input rotation speed monitoring unit that monitors an input rotation speed of the prime mover;

an output rotation speed monitoring unit that monitors an actual rotation speed of the load device;

and the control unit compares the actual rotating speed with a standard rotating speed, and controls the rotating speed adjusting mechanism to adjust the rotating speed when the actual rotating speed is deviated from the standard rotating speed.

8. The high accuracy permanent magnet governor of claim 7 and further including a monitoring control mechanism, the input speed monitoring unit including: the system comprises an input rotating speed sensor and a rotating speed sensing disc, wherein the input rotating speed sensor detects the rotating speed sensing disc to obtain the input rotating speed, and the output rotating speed monitoring unit obtains the actual rotating speed by detecting the magnetic coupling mechanism.

9. The high accuracy permanent magnet governor of claim 7 and further comprising:

the position coding unit monitors the number of rotation turns and the rotation angle of the actuating motor to obtain the size of an air gap between the magnet disc assembly and the eddy current disc assembly and outputs the size to the control unit;

the temperature monitoring unit is used for monitoring the working temperature of the magnetic coupling mechanism;

the control unit can also control the rotating speed adjusting mechanism to adjust according to the size of the air gap and/or the working temperature.

10. The high accuracy permanent magnet governor of claim 5 wherein the magnetic coupling mechanism further includes a limiting member sleeved on the transmission shaft and abutting the tripod, and the other magnet disc member is sleeved on and connected to the limiting member for limiting axial movement of the tripod.

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