CN109818481A - A kind of novel limited-moment permanent magnetic coupling - Google Patents

Abstract

The invention belongs to permanent magnet transmission equipment technical fields, it is related to a kind of novel limited-moment permanent magnetic coupling, it is made of seperated coaxial first axle group and the second axis group, the structure of first axle group includes No.1 axis, No.1 bolt, mounting disc, magnet disk, permanent magnet, cooling fin and No. two bolts, the structure of second axis group includes No. two axis, No. three bolts, support base, No.1 positioning disk, No. two positioning disks, slider disc, conductor disc and limiter, it is capable of providing soft start, the function of isolation vibration and automatic overload protection, when load is overloaded, when stuck or stall, the air gap between conductor disc and magnet disk becomes larger, first axle group is separated with the transmission of the second axis group, prime mover zero load free-runing operation, realize automatic overload protection, prime mover can be restarted rapidly after troubleshooting is complete to resume production, frequently unlimited number it can restart prime mover；Its structure is simple, smaller, and weight is lighter, and stability is more preferable, installs easier, permission bigger angular deviation and offset deviation.

Description

A kind of novel limited-moment permanent magnetic coupling

Technical field:

The invention belongs to permanent magnet transmission equipment technical fields, are related to a kind of novel limited-moment permanent magnetic coupling, have limitation The function of torque and overload protection.

Background technique:

Magnetic coupling is also referred to as magnetic coupling, permanent magnetic vortex drive device, mainly by copper rotor, p-m rotor and control Three parts of device form；Generally, copper rotor and motor axis connection, the axis connection of p-m rotor and working machine, copper rotor and permanent magnetism Without mechanical connection between rotor, the mechanical connection of torque is not transmitted, in this way, foring soft (magnetic) between motor and working machine even It connects, realizes the variation of working crankshaft torque, revolving speed by adjusting air gap.Because of the difference of air gap regulative mode, permanent-magnet eddy current is passed Dynamic device is divided into the different types such as standard type, delaying type, distance-limiting type, speed-regulating type.Magnetic coupling based on permanent magnet transmission technology It is the advanced drive technology that developed recently gets up, permanent magnet transmission technology uses maglev principle, sets in prime mover and load It is standby without in the case where any contact, the energy transmission of prime mover to load equipment, to realize the transmitting of torque.Distance-limiting type Permanent magnet coupler is that permanent magnet transmission technology applies a kind of more and more extensive transmission device in the industrial production, and device has flexibility Starting, isolation vibration, overload protection, the advantages such as energy conservation and environmental protection, be particularly suitable for conveyer belt, speed reducer, roll squeezer, elevator, The heavy industry equipments such as coal pulverizer.A kind of limited-moment permanent magnetic coupling disclosed in Chinese patent 201320350383.6 includes a permanent magnetism Rotor is made of tubular p-m rotor and plate-like p-m rotor two parts, and two parts, at an entirety, the tubular permanent magnetism turns Be equipped on the outer wall of son direct-axis to permanent magnet, be equipped on the plate-like p-m rotor perpendicular to axial permanent magnet；One Conductor rotor is made of tubular conductor cylinder and conductor disc two parts, and two parts are set on tubular conductor cylinder inner wall at an entirety It is equipped with copper ring；Plate-like copper ring is provided in conductor disc；Limited square thrust mechanism, the limit square thrust are installed on the p-m rotor Mechanism includes torque spring, limit plate, adjusting screw rod, fixing piece and shaft, and the limit plate and fixing piece can by shaft Rotation connection, torque spring is set on the shaft, and a torque arm of torque spring is fixed on limit plate, another torque arm and solid Determine part to be fixedly connected；Limit plate is connected through a screw thread with adjusting screw rod；Fixing piece is fixed on p-m rotor；Chinese patent 201320100263.0 a kind of disclosed distance-limiting type magnetic coupling includes permanent magnetic disk, the two sides of permanent magnetic disk are respectively arranged with first Magnetic conductive disk and the second magnetic conductive disk, the first magnetic conductive disk and the second magnetic conductive disk can relative to permanent magnetic disk symmetric motion, described first Double end pin is connected on magnetic conductive disk, one end activity of double end pin, which is worn, to be connect in fixed large flange, and the other end is located at fixed large flange At direction far from the first magnetic conductive disk, it is provided with spring_slide structure on fixed large flange, is provided in spring_slide structure Spring, spring are withstood between the inner wall of spring_slide structure and sliding block, and the movable end of sliding block and the outer end of double end pin match, and Limited step is additionally provided in the middle part of double end pin；A kind of limited-moment permanent magnetic coupling disclosed in Chinese patent 201320166526.8 Including half connection device of half connection device of input and output, half connection device of input connects input terminal conductor disc end cap, and input terminal conductor disc end cap is solid Determine input terminal conductor disc, input terminal conductor disc end cap is connected with output end conductor disc end cap by breath retainer, output end Conductor disc end cap fixes output end conductor disc；The space that input terminal conductor disc, output end conductor disc and breath retainer are constituted It is interior that the input terminal permanent magnetism body disc and output end permanent magnetism body disc, input terminal permanent magnetism body disc and output end permanent magnetism for being equipped with permanent magnet are set Body disc is connected by main shaft, and main shaft one end passes through installation auxiliary breath adjuster after input terminal permanent magnetism body disc, and the main shaft other end is worn Connection output half joins device, input terminal permanent magnet after crossing output end permanent magnetism body disc, output end conductor disc and output end conductor disc end cap Dust-protection type gear regulator, input terminal permanent magnetism body disc and input terminal conductor are set on the main shaft between disk and output end permanent magnetism body disc Disk, output end permanent magnetism body disc and output end conductor disc are connected by magnetic fields；Disclosed in Chinese patent 201020105226.5 A kind of permanent magnet torque-limiting coupler is installed cage rotor in first axle, is made of four turntables, outside including two coaxial axis Two outer rotary tables, are connected with pin shaft therebetween, and the inner rotary table of inside two can slide on pin shaft；Between two inner rotary tables equipped with and The permanent magnetic rotation disc of second axis connection, is equipped with torque limiting device on two outer rotary tables, and first axle and the second axis can input or defeated each other Shaft；A kind of limited-moment permanent magnetic coupling disclosed in Chinese patent 201210127987.4 includes tubular outer p-m rotor, tubular Interior p-m rotor and transmission mechanism are pacified on the bottom of p-m rotor and barrel respectively in the outer p-m rotor of the tubular and tubular It is evenly distributed according to magnetic pole staggered pattern equipped with permanent magnet；Two rotors can rotate synchronously on respective axis, driver Range line device is installed on structure；P-m rotor can export or input mechanism each other in the outer p-m rotor of tubular or tubular, can pass It is slided on motivation structure；Without mechanical connection between two p-m rotors, connected by magnetic fields；Chinese patent 201310242659.3 A kind of disclosed limited-moment permanent magnetic coupling includes a p-m rotor, by tubular p-m rotor and plate-like p-m rotor two parts group At, and two parts are at an entirety, be equipped on the outer wall of the tubular p-m rotor direct-axis to permanent magnet, the plate-like is forever It is equipped on magnet rotor perpendicular to axial permanent magnet；One conductor rotor is made of tubular conductor cylinder and conductor disc two parts, and Two parts are provided with copper ring on tubular conductor cylinder inner wall at an entirety；Plate-like copper ring is provided in conductor disc；The permanent magnetism turns Limited square thrust mechanism is installed on son, the limit square thrust mechanism include torque spring, limit plate, adjusting screw rod, fixing piece with And shaft, the limit plate and fixing piece are rotatably connected by shaft, and torque spring is set on the shaft, and the one of torque spring Torque arm is fixed on limit plate, and another torque arm is fixedly connected with fixing piece；Limit plate is connected through a screw thread with adjusting screw rod； Fixing piece is fixed on p-m rotor；A kind of novel damping distance-limiting type permanent-magnet eddy current disclosed in Chinese patent 201420266154.0 Coupler includes driving shaft axle sleeve, permanent magnet fixed disk, permanent magnet, copper dish, driven disc, Moving plate connector and driven flange, electricity The driving shaft of machine output is connected with driving shaft axle sleeve, and driving shaft axle sleeve transfers torque to permanent magnet fixed disk by key, forever Magnet fixed disk drives permanent magnet rotation, since magnetic induction transfers torque to driven disc between the permanent magnet and copper dish of rotation, Driven disc transfers torque to driven disc connector, and driven disc connector transfers torque to driven flange by bolt, finally Driven shaft output torque is delivered torque to by driven flange；Above-mentioned patented product and distance-limiting type permanent magnetism in the prior art are even Clutch is made of more conductor discs and more magnet disks, there is that structure is complicated, and weight of equipment is big, volume is big, installation and debugging are difficult, steady Qualitative difference, the long problem of mounting distance, it usually needs move back prime mover to meet installation space；When prime mover shaft or load are set When axial float occurs in standby axis, it be easy to cause contact friction of the magnet rotor with conductor；Application is restricted.For this purpose, seeking Ask that design a kind of stability higher, it is low to requirements of installation space, do not need the novel distance-limiting type permanent magnetism coupling on mobile prime mover basis Clutch.

Summary of the invention:

It is an object of the invention to overcome disadvantage of the existing technology, a kind of novel limited-moment permanent magnetic coupling is designed, It can be realized the function of soft start, isolation vibration and automatic overload protection.

To achieve the goals above, novel limited-moment permanent magnetic coupling of the present invention is by seperated coaxial first axle group It is formed with the second axis group；The main structure of first axle group includes No.1 axis, No.1 bolt, mounting disc, magnet disk, permanent magnet, dissipates Backing and No. two bolts；No.1 axis is connected by the mounting disc of No.1 bolt and annular structure, is set on the medial surface of mounting disc It is equipped with magnet disk, the permanent magnet for being internally provided with the extremely pairs of arranged adjacent of the pole N and S of magnet disk is set on the lateral surface of mounting disc It is equipped with cooling fin, mounting disc is connect by No. two bolts with magnet disk and cooling fin；The main structure of second axis group includes No. two Axis, No. three bolts, support base, No.1 positioning disk, No. two positioning disks, slider disc, conductor disc and limiter；No. two axis pass through No. three Bolt is connect with support base, and fixed set has the No.1 positioning disk being parallel to each other and No. two positioning disks, support base on support base Upper slidingtype is provided with slider disc, and slider disc is connect with conductor disc bolt type, and slider disc and conductor disc can be synchronous with support base Rotary motion, and slide axially on the support base between No.1 positioning disk and No. two positioning disks, it is provided with and has in slider disc The limiter of torsional spring.

It is not physically connected between first axle group of the present invention and the second axis group, it is the air gap, flame proof can be placed Material；No.1 axis and No. two axis are mounted on prime mover shaft side or bearing shaft side, and the installation site of No.1 axis and No. two axis can be mutual It changes；Mounting disc and slider disc are that ferrimagnet, mounting disc and slider disc are sealed the magnetism of permanent magnet, prevent its leakage Magnetic；The shape of permanent magnet includes but is not limited to cuboid, cube, cylindrical body and ring body；The material of conductor disc is that electric conductivity is good Good metal or nonmetallic materials；The installation position of limiter includes the shaft shoulder of support base, the side of No. two positioning disks and sliding The side of disk.

When first axle group of the present invention can satisfy cooling requirements, cancel the setting of cooling fin；Second axis group is discontented When sufficient cooling requirements, cooling fin is set in the lateral surface of conductor disc.

When the shaft shoulder vertex of support base of the present invention is higher than the vertex of limiter, support base has No. two positioning disks Limit function cancels the setting of No. two positioning disks.

Novel limited-moment permanent magnetic coupling of the present invention is in use, pass through key or swelling by No.1 axis for first axle group Set is mounted on prime mover shaft side, and the second axis group is mounted on bearing shaft side by key or expansion sleeve by No. two axis；When prime mover band When dynamic first axle group rotation, magnet disk and conductor disc generate relative motion, and the inside of conductor disc generates vortex, is vortexed the sense of generation The magnetic field interaction of magnetic field and permanent magnet is answered, the transmitting of load torque is realized in band dynamic load rotation acting；Prime mover is inactive Or starting moment, limiter is in the open state under the twisting force of torsional spring, when prime mover work normally when, limiter by Centrifugal force be greater than the torsion of torsional spring, limiter be in closed state, when load equipment generation stall, stuck or overload fault When, huge instantaneous thrust is generated between magnet disk and conductor disc, thrust pushes conductor disc rapid before limiter is not switched on Slided along support base towards the opposite direction of magnet disk, limiter is still in closed state at this time, magnet disk and conductor disc it Between the air gap become larger, the transmission of first axle group and the second axis group separates, and prime mover zero load free-runing operation realizes overload protection.

Compared with prior art, the present invention the function of soft start, isolation vibration and automatic overload protection is capable of providing, when negative When carrying generation overload, stuck or stall, the air gap between conductor disc and magnet disk becomes larger, and first axle group and the second axis group pass Dynamic separation, prime mover zero load free-runing operation realize automatic overload protection, can restart prime mover recovery after troubleshooting is complete rapidly Production frequently unlimited number can restart prime mover；Its structure is simple, smaller, and weight is lighter, and stability is more preferable, installation It is easier, allow bigger angular deviation and offset deviation, does not need mobile prime mover basis, extend prime mover and set with load Standby service life, avoids maintenance and maintenance, reduces production cost, has ensured production safety.

Detailed description of the invention:

Fig. 1 is main structure schematic illustration of the invention.

Fig. 2 is limiter of the present invention schematic diagram in the open state.

Fig. 3 is the schematic diagram that limiter of the present invention is in closed state.

Specific embodiment:

The present invention will be further described by way of example and in conjunction with the accompanying drawings.

Embodiment 1:

The novel limited-moment permanent magnetic coupling that the present embodiment is related to is by seperated coaxial 2 groups of first axle group 1 and the second axis group At；The main structure of first axle group 1 includes No.1 axis 10, No.1 bolt 11, mounting disc 12, magnet disk 13, permanent magnet 14, heat dissipation Piece 15 and No. two bolts 16；No.1 axis 10 is connect by No.1 bolt 11 with the mounting disc 12 of annular structure, mounting disc 12 Magnet disk 13, the permanent magnet 14 for being internally provided with the extremely pairs of arranged adjacent of the pole N and S of magnet disk 13, peace are provided on medial surface Cooling fin 15 is provided on the lateral surface of sabot 12, mounting disc 12 is connected by No. two bolts 16 and magnet disk 13 and cooling fin 15 It connects；The main structure of second axis group 2 includes 20, No. three bolts 21 of No. two axis, support base 22, No.1 positioning disk 23, two positioning Disk 24, slider disc 25, conductor disc 26 and limiter 27；No. two axis 20 are connect by No. three bolts 21 with support base 22, support base Fixed set has the No.1 positioning disk 23 being parallel to each other and No. two positioning disks 24 on 22, and slidingtype is provided with cunning on support base 22 Moving plate 25, slider disc 25 are connect with 26 bolt type of conductor disc, and slider disc 25 and conductor disc 26 can be with 22 synchronous rotaries of support base Movement, and slide axially on the support base 22 between No.1 positioning disk 23 and No. two positioning disks 24, it is provided in slider disc 25 Limiter 27 with torsional spring.

It is not physically connected between the first axle group 1 and the second axis group 2 that the present embodiment is related to, it is the air gap, can places Flame proof material；No.1 axis 10 and No. two axis 20 are mounted on prime mover shaft side or bearing shaft side, the peace of No.1 axis 10 and No. two axis 20 Holding position can exchange；Mounting disc 12 and slider disc 25 are ferrimagnet, and mounting disc 12 and slider disc 25 are to permanent magnet 14 Magnetism be sealed, prevent its leakage field；The shape of permanent magnet 14 includes but is not limited to cuboid, cube, cylindrical body and ring body； The material of conductor disc 26 is the good metal of electric conductivity or nonmetallic materials；The installation position of limiter 27 includes support base 22 The shaft shoulder, the side of No. two positioning disks 24 and the side of slider disc 25.

When the first axle group 1 that the present embodiment is related to can satisfy cooling requirements, cancel the setting of cooling fin 15；Second axis group 2 when being unsatisfactory for cooling requirements, and cooling fin 15 is arranged in the lateral surface of conductor disc 26.

When the shaft shoulder vertex for the support base 22 that the present embodiment is related to is higher than the vertex of limiter 27, support base 22 has No. two The limit function of positioning disk 24 cancels the setting of No. two positioning disks 24.

The novel limited-moment permanent magnetic coupling that the present embodiment is related to is in use, pass through key by No.1 axis 10 for first axle group 1 Or expansion sleeve is mounted on prime mover shaft side, and the second axis group 2 is mounted on bearing shaft side by key or expansion sleeve by No. two axis 20；When When prime mover drives first axle group 1 to rotate, magnet disk 13 and conductor disc 26 generate relative motion, and the inside of conductor disc 26 generates whirlpool Stream, is vortexed the induced magnetic field of generation and the magnetic field interaction of permanent magnet 14, and load torque is realized in band dynamic load rotation acting Transmitting；Prime mover it is inactive or starting moment, limiter 27 is in the open state under the twisting force of torsional spring, when prime mover just Often when work, the centrifugal force that limiter 27 is subject to is greater than the torsion of torsional spring, and limiter 27 is in closed state, when load equipment is sent out When raw stall, stuck or overload fault, huge instantaneous thrust is generated between magnet disk 13 and conductor disc 26, thrust is in limiter 27, which are not switched on promotion conductor disc 26 before, slides along support base 22 towards the opposite direction of magnet disk 13 rapidly, at this time limiter 27 still in closed state, and the air gap between magnet disk 13 and conductor disc 26 becomes larger, and first axle group 1 and the second axis group 2 pass Dynamic separation, prime mover zero load free-runing operation realize overload protection.

Claims (5)

1. a kind of novel limited-moment permanent magnetic coupling, it is characterised in that be made of seperated coaxial first axle group and the second axis group； The main structure of first axle group includes No.1 axis, No.1 bolt, mounting disc, magnet disk, permanent magnet, cooling fin and No. two bolts； No.1 axis is connected by the mounting disc of No.1 bolt and annular structure, is provided with magnet disk, magnet on the medial surface of mounting disc The permanent magnet for being internally provided with the extremely pairs of arranged adjacent of the pole N and S of disk is provided with cooling fin on the lateral surface of mounting disc, installs Disk is connect by No. two bolts with magnet disk and cooling fin；The main structure of second axis group includes No. two axis, No. three bolts, support Seat, No.1 positioning disk, No. two positioning disks, slider disc, conductor disc and limiter；No. two axis are connected by No. three bolts and support base It connects, fixed set has the No.1 positioning disk being parallel to each other and No. two positioning disks on support base, and slidingtype is provided on support base Slider disc, slider disc are connect with conductor disc bolt type, and slider disc and conductor disc can be moved with support base synchronous rotary, and one It slides axially on support base number between positioning disk and No. two positioning disks, the limiter with torsional spring is provided in slider disc.

2. novel limited-moment permanent magnetic coupling according to claim 1, it is characterised in that first axle group and the second axis group it Between it is not physically connected, be the air gap, flame proof material can be placed；No.1 axis and No. two axis are mounted on prime mover shaft side or load Axis side, No.1 axis and the installation site of No. two axis can exchange；Mounting disc and slider disc are ferrimagnet, mounting disc and cunning Moving plate is sealed the magnetism of permanent magnet, prevents its leakage field；The shape of permanent magnet includes but is not limited to cuboid, cube, circle Cylinder and ring body；The material of conductor disc is the good metal of electric conductivity or nonmetallic materials；The installation position of limiter includes The shaft shoulder of support base, the side of No. two positioning disks and slider disc side.

3. novel limited-moment permanent magnetic coupling according to claim 1, it is characterised in that first axle group can satisfy heat dissipation It is required that when, cancel the setting of cooling fin；When second axis group is unsatisfactory for cooling requirements, cooling fin is set in the lateral surface of conductor disc.

4. novel limited-moment permanent magnetic coupling according to claim 1, it is characterised in that the shaft shoulder vertex of support base is higher than When the vertex of limiter, support base has the limit function of No. two positioning disks, cancels the setting of No. two positioning disks.

5. novel limited-moment permanent magnetic coupling according to claim 1, it is characterised in that in use, by first axle group by one Number axis is mounted on prime mover shaft side by key or expansion sleeve, and the second axis group is mounted on load by key or expansion sleeve by No. two axis Axis side；When prime mover drives the rotation of first axle group, magnet disk and conductor disc generate relative motion, and the inside of conductor disc generates whirlpool Stream, is vortexed the induced magnetic field of generation and the magnetic field interaction of permanent magnet, and the biography of load torque is realized in band dynamic load rotation acting It passs；Prime mover is inactive or starts moment, and limiter is in the open state under the twisting force of torsional spring, when the normal work of prime mover When making, centrifugal force that limiter is subject to is greater than the torsion of torsional spring, and limiter be in closed state, when load equipment generation stall, Huge instantaneous thrust is generated when stuck or overload fault, between magnet disk and conductor disc, thrust is before limiter is not switched on Conductor disc is pushed to slide along support base towards the opposite direction of magnet disk rapidly, limiter is still in closed state, magnetic at this time The air gap between body disc and conductor disc becomes larger, and first axle group is separated with the transmission of the second axis group, prime mover zero load free-runing operation, Realize overload protection.