CN103904858A

CN103904858A - Single-tray-type permanent magnet eddy-current coupler with fixed end surface

Info

Publication number: CN103904858A
Application number: CN201410095459.4A
Authority: CN
Inventors: 张世伟; 王富安; 王德喜; 赵克中
Original assignee: Northeastern University China
Current assignee: Northeastern University China
Priority date: 2014-03-14
Filing date: 2014-03-14
Publication date: 2014-07-02
Anticipated expiration: 2034-03-14
Also published as: CN103904858B

Abstract

The utility model relates to a single flat disc permanent magnet eddy current coupling with fixed end faces, which belongs to the technical field of permanent magnet eddy current transmission. The present invention can automatically ensure the concentric positioning during installation and operation, simplifies the installation difficulty and reduces the workload. The axial repulsion force is directly transmitted to the front end positioning frame of the motor to avoid additional external force on the motor shaft system. The invention includes a driving rotor, a driven rotor, an end face positioning seat and an end cover shaft; the driving rotor is composed of a driving rotor shaft, a magnetic rotor disc and a permanent magnet layer; the driven rotor is composed of a driven rotor body, a sliding bushing , thrust spring, eddy current rotor disk and eddy current ring; the end face positioning seat is composed of the end face positioning plate and the positioning bearing seat fixed on the end face positioning plate, and the end cover shaft is composed of the end cover and the driven shaft fixed in the middle of the end cover Or driven shaft sleeve composition.

Description

Single tray type permanent magnet eddy current coupling that a kind of end face is fixing

Technical field

The invention belongs to permanent-magnet eddy current drive technology field, particularly relate to the fixing single tray type permanent magnet eddy current coupling of a kind of end face.

Background technology

The basic functional principle of permanent-magnet eddy current drive technology is: in the time of permanent magnet rotor and the motion for the relative rotation of ring of eddy rotor, the permanent magnet that in permanent magnet rotor, pole orientation is alternately arranged can produce alternating magnetic field in the ring of eddy of being made up of electric conducting material, and then generate the eddy current of alternation therein, this eddy current produces again Induced magnetic field in ring of eddy, stationary magnetic field in Induced magnetic field and permanent magnet rotor interacts, just between two rotors, produce coupling torque, thereby reach the effect of transmitting motion and moment of torsion.The version of permanent magnetic vortex drive device mainly contains two kinds of socket type peace dish-types at present, and its application mainly comprises permanent magnet eddy current coupling (driver) and permanent-magnet eddy current speed regulator.Wherein tray type permanent magnet eddy current coupling, comprise single tray type and two tray type, have that axial arrangement is little, weight is light, it is little to vibrate, permanent magnetic material efficiency is high, eddy current loss is little, the design feature such as anti-jamming, automatic trip coupling, the application of succeeding in workplaces such as requiring flexible startup, blocking rotation, limit torque and damping vibration-isolating.

But, existing permanent-magnet eddy current transmission patented technology, generally the positioning connection of permanent magnet rotor and ring of eddy rotor is paid close attention to not, existing tray type permanent magnet eddy current coupling product, normally adopts one of following two kinds of modes to realize two rotors location is installed: a kind of is to utilize connecting bushing to be directly sleeved on the drive shaft of prime mover or load rotor block; Another kind is special support to be set two rotors are supported respectively, and recycling shaft coupling parts, couple together the rotating shaft of the drive shaft of prime mover and load and two rotors.All there is obvious deficiency in these two kinds of connected modes: front a kind of connected mode is by weight all rotor and the stressed drive shaft that all directly puts on prime mover or load, especially in the time directly belt pulley or gear being installed, there is larger radial effect power, greatly increase the stressed of prime mover or load drive shaft spring bearing, thereby cause the severe of its working condition, the increase of vibrating noise, the reduction of useful working life; Rear a kind of connected mode is owing to having increased by one or two cover supports, make to ensure between prime mover, load and support that the concentric locating of rotating shaft is more difficult, bring very big inconvenience to installation exercise, while also operation to system, bring more exciting source and uncertain adverse factor simultaneously.Therefore, develop more rational permanent magnet eddy current coupling positioning connection structure, there is the clear and definite market demand.

Summary of the invention

The problem existing for prior art, the invention provides the fixing single tray type permanent magnet eddy current coupling of a kind of end face, compared with common single tray type permanent magnet eddy current coupling, shaft coupling of the present invention is directly installed on motor front end boss, can automatically ensure the concentric locating in installation and running, greatly simplify installation difficulty and reduced workload, in service can be by gravity suffered shaft coupling of the present invention, axial repulsive force between outer active force and power rotor and driven rotor is directly passed to the front end location support of motor, avoid motor rotary shaft system to bear additional external force.

To achieve these goals, the present invention adopts following technical scheme: single tray type permanent magnet eddy current coupling that a kind of end face is fixing, comprises power rotor, driven rotor, end face positioning seat and end-cover axle; Described power rotor is made up of power rotor axle, magnet rotor dish and permanent magnet layer; Magnet rotor dish is fixed on the lateral wall middle part of power rotor axle, and permanent magnet layer is fixed on the end face of magnet rotor dish; Described driven rotor is made up of driven rotor body, sliding shaft sleeve, thrust spring, vortex rotor dish and ring of eddy; Between the power rotor axle of driven rotor body and power rotor, be connected by driven bearing, sliding shaft sleeve is arranged on the external side of driven rotor, between sliding shaft sleeve and driven rotor body, is connected by feather key; Vortex rotor dish is fixed on the lateral wall of sliding shaft sleeve; Ring of eddy is fixed on the inner face of vortex rotor dish, and the permanent magnet layer of ring of eddy and power rotor is oppositely arranged, and leaves gap between ring of eddy and permanent magnet layer; Described end face positioning seat is made up of end face positioning disk and the positioning bearing seat being fixed on end face positioning disk, is provided with stepped ramp type seam on the outer face of end face positioning disk; Between positioning bearing seat and power rotor axle, be connected by location bearing; On positioning bearing seat, be provided with bearing pedestal lubricating cup, bearing pedestal lubricating cup is connected with the inside of location bearing by the bearing pedestal oil circuit being arranged on positioning bearing seat sidewall; Described end-cover axle is arranged on the outer end of driven rotor, and end-cover axle is made up of end cap and the driven shaft or the driven axle sleeve that are fixed on end cap middle part, and driven shaft or driven axle sleeve and power rotor axle coaxially arrange; End cap is fixedly connected with driven rotor body; Thrust spring is arranged between vortex rotor dish and end cap; On end cap, be provided with end cap lubricating cup, end cap lubricating cup is connected with the inside of driven bearing by the end cap oil circuit being arranged on driven rotor body and end cap.

Described permanent magnet layer is cirque structure, is made up of even number set permanent magnet group, and described permanent magnet group is distributed on magnet rotor dish along even circumferential; Every group permanent-magnet group is made up of some permanent-magnet blocks, every group permanent-magnet group includes the permanent-magnet block of equal number, the structure of every permanent-magnet block is identical, and cross section is rectangle, trapezoidal or fan-shaped, and the magnetizing direction of every permanent-magnet block is the axial direction of magnet rotor dish; The polar orientation that magnetizes of the permanent-magnet block in same group permanent-magnet group is identical, the opposite polarity directions that magnetizes of two adjacent groups permanent magnet group; Close contact between two adjacent groups permanent magnet group, or leave gap, and in gap, fill non-magnetic isolating pad.

Described ring of eddy is annular flat board, and the internal diameter of ring of eddy is less than the internal diameter of permanent magnet layer, and the external diameter of ring of eddy is greater than the external diameter of permanent magnet layer.

Be provided with spring shield at described end cap towards the end face edge of thrust spring one side, the outer end of thrust spring is arranged in spring shield.

On the end face of the close magnet rotor dish of described driven rotor body, be provided with spacing ring.

Beneficial effect of the present invention:

1, because shaft coupling of the present invention has adopted end face location structure, end face positioning disk is matched with B35 type motor front end boss by step seam, and utilization is bolted on motor stator, add location bearing outward at the power rotor axle being directly connected with motor rotary shaft, thereby make axial repulsive force between the suffered gravity of shaft coupling of the present invention, outer active force and power rotor and driven rotor be directly passed to the front end location support of motor, avoided motor rotary shaft system to bear additional external force; Can structure, automatically ensure the concentric locating in installation and running, greatly simplified installation difficulty and reduced workload simultaneously;

2, in the time there is suddenly heavy duty or stuck phenomenon in the suffered load of shaft coupling of the present invention, driven rotor is significantly even stall of reduction of speed thereupon, between power rotor and driven rotor, there is huge speed difference, now ring of eddy can be subject to the axial axial thrust of end cap, thereby overcome the restoring force of thrust spring, drive vortex rotor dish and sliding shaft sleeve to move to end-cover axle direction, and then with the permanent magnet pull-up of power rotor from coupling, reach and prevent that vortex rotor dish from sharply generating heat, preventing the effect of motor long term overloading.

Brief description of the drawings

Fig. 1 is the structural representation of an embodiment of the fixing single tray type permanent magnet eddy current coupling of end face of the present invention;

Fig. 2 is the A-A cutaway view of Fig. 1;

In figure, 1--motor, 11--motor rotary shaft, 12-motor axle key, 13-motor front end boss, 14-bolt, 2--end face positioning seat, 21--end face positioning disk, 22-positioning bearing seat, 23--stepped ramp type seam, 24--location bearing, 25--bearing pedestal lubricating cup, 26--bearing pedestal oil circuit, 3--power rotor, 31-power rotor axle, 32-magnet rotor dish, 33-permanent magnet layer, 34-hollow shaft part, the solid shaft part of 35--, 36-permanent magnet group, 37-permanent-magnet block, 38-non-magnetic isolating pad, 4--driven rotor, 41-driven rotor body, 42-driven bearing, 43-sliding shaft sleeve, 44-thrust spring, 45-vortex rotor dish, 46-ring of eddy, 47-feather key, 48-spacing ring, 5--end-cover axle, the driven axle sleeve of 51--, 52--end cap, 53--attachment screw, 54--spring shield, 55-end cap lubricating cup, 56-end cap oil circuit, 6--load rotating shaft.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.

As shown in Figure 1 and Figure 2, single tray type permanent magnet eddy current coupling that a kind of end face is fixing, comprises power rotor 3, driven rotor 4, end face positioning seat 2 and the end-cover axle 5 of coaxial setting; Described power rotor 3 is made up of magnet rotor dish 32 and the permanent magnet layer 33 of power rotor axle 31, collar plate shape; Power rotor axle 31 is hollow shaft part 34 near a section of motor 1, hollow shaft part 34 is cylinder type, on the madial wall of hollow shaft part 34, be provided with the first keyway, for matching with the motor axle key 12 being arranged on the motor rotary shaft 11 of B35 type motor 1, between the hollow shaft part 34 of power rotor axle 31 and motor rotary shaft 11 for there to be the moving of movement clearance to coordinate; Power rotor axle 31 dorsad a section of motor 1 is solid shaft part 35, and magnet rotor dish 32 is coaxially fixed on the lateral wall middle part of power rotor axle 31, and magnet rotor dish 32 is made up of permeability magnetic material; Permanent magnet layer 33 is fixed on the end face of magnet rotor dish 32;

Described driven rotor 4 is arranged on a side of the magnet rotor dish 32 of power rotor 3, and setting adjacent with permanent magnet layer 33, driven rotor 4 is made up of vortex rotor dish 45 and the ring of eddy 46 of the sliding shaft sleeve 43 of the driven rotor body 41 of cylinder type, cylinder type, thrust spring 44, collar plate shape, between the power rotor axle 31 of driven rotor body 41 and power rotor 3, be connected by driven bearing 42, the inner ring of driven bearing 42 is fixedly connected with the lateral wall of the solid shaft part 35 of power rotor axle 31, the outer ring of driven bearing 42 is fixedly connected with the madial wall of driven rotor body 41, on the lateral wall of driven rotor body 41, be provided with vertically three feather keys 47, sliding shaft sleeve 43 is arranged on driven rotor body 41 outsides, on sliding shaft sleeve 43 madial walls, be provided with three the second keyways, the second keyway matches with the feather key 47 on driven rotor body 41, make can make vertically relative sliding between sliding shaft sleeve 43 and driven rotor body 41, vortex rotor dish 45 is made up of permeability magnetic material, is coaxially fixed on the lateral wall of sliding shaft sleeve 43, ring of eddy 46 is made of copper, and is coaxially fixed on the inner face of vortex rotor dish 45, is oppositely arranged, and leaves gap between ring of eddy and permanent magnet layer with the permanent magnet layer 33 of power rotor 3, the thrust spring 44 of annular is arranged on the lateral wall of sliding shaft sleeve 43,

Described end face positioning seat 2 is arranged on the opposite side of the magnet rotor dish 32 of power rotor 3, end face positioning seat 2 is by collar plate shape end face positioning disk 21 and be coaxially fixed on cylinder type on end face positioning disk 21 location bearing pedestal 22 and form, on the outer face of motor 1, be provided with stepped ramp type seam 23 at end face positioning disk 21, for matching with the motor front end boss 13 of B35 type motor 1, end face positioning disk 21 is fixed on motor 1 stator by bolt 14; Between positioning bearing seat 22 and the hollow shaft part 34 of power rotor axle 31, be connected by two location bearings 24, the inner ring of location bearing 24 is fixedly connected with the lateral wall of the hollow shaft part 34 of power rotor axle 31, and the outer ring of location bearing 24 is fixedly connected with the madial wall of positioning bearing seat 22; On positioning bearing seat 22, be provided with bearing pedestal lubricating cup 25, bearing pedestal lubricating cup 25 is connected with location bearing 24 inside by the bearing pedestal oil circuit 26 being arranged on positioning bearing seat 22 sidewalls, for location bearing 24 provides lubricating oil;

Described end-cover axle 5 is arranged on driven rotor 4 outer ends, and end-cover axle 5 is made up of collar plate shape end cap 52 and the driven axle sleeve 51 that is fixed on end cap center, and driven axle sleeve 51 coaxially arranges with power rotor axle 31; End cap 52 is fixed on by attachment screw 53 on the outer face of driven rotor body 41, and thrust spring 44 is arranged between vortex rotor dish 45 and end cap 52, and vortex rotor dish 45 and end cap 52 are pressed respectively in the two ends of thrust spring 44; On end cap 52, be provided with end cap lubricating cup 55, end cap lubricating cup 55 is connected with driven bearing 42 inside by the end cap oil circuit 56 being arranged on driven rotor body 41 and end cap 52, for driven bearing 42 provides lubricating oil; Driven axle sleeve 51 is coaxially fixedly connected with load rotating shaft 6.

Described permanent magnet layer 33 is cirque structure, is made up of 16 group permanent-magnet groups 36, and described permanent magnet group 36 is distributed on magnet rotor dish 32 along even circumferential; Every group permanent-magnet group 36 is made up of two permanent-magnet blocks 37, and the structure of every permanent-magnet block 37 is identical, and cross section is trapezoidal, and the magnetizing direction of every permanent-magnet block 37 is the axial direction of magnet rotor dish 32; The polar orientation that magnetizes of interior two permanent-magnet blocks 37 of same group permanent-magnet group 36 is identical, the opposite polarity directions that magnetizes of two adjacent groups permanent magnet group 36; Between two adjacent groups permanent magnet group 36, leave gap, and in gap, fill non-magnetic isolating pad 38, non-magnetic isolating pad 38 adopts non-magnet material to make.

Described ring of eddy 46 is annular flat board, and the internal diameter of ring of eddy 46 is less than the internal diameter of permanent magnet layer 33, and the external diameter of ring of eddy 46 is greater than the external diameter of permanent magnet layer 33.

The spring shield 54 that is provided with cylinder type at described end cap 52 towards the end face edge of thrust spring 44 1 sides, the outer end of thrust spring 44 is arranged in spring shield 54, is used for fixing thrust spring 44.

On the end face of the close magnet rotor dish 32 of described driven rotor body 41, be provided with spacing ring 48, for the minimum range between controlled vortex flow ring 46 and permanent magnet layer 33, and prevent in sliding shaft sleeve 43 moving process, ring of eddy 46 bumps with permanent magnet layer 33.

Below in conjunction with brief description of the drawings operation principle of the present invention and process:

As shown in Figure 1 and Figure 2, shaft coupling of the present invention is in the time of work, and first motor rotary shaft 11 drives power rotor 3 to rotate by motor axle key 12, and the now not yet motion of driven rotor 4 and connected end-cover axle 5; Because the polar orientation that magnetizes of the arbitrary neighborhood two group permanent-magnet groups 36 in the permanent magnet layer 33 of power rotor 3 is contrary, therefore in the time of power rotor 3 and driven rotor 4 motion for the relative rotation, the permanent magnet layer 33 of power rotor 3 can be at the interior formation alternating magnetic field of ring of eddy 46 of driven rotor 4, because ring of eddy 46 is to be become by conductor material copper, the alternating magnetic field that permanent magnet layer 33 produces can generate the eddy current of alternation therein, and then this eddy current produces Induced magnetic field again in ring of eddy 46; The stationary magnetic field of the permanent magnet layer 33 of the Induced magnetic field in ring of eddy 46 and power rotor 3 interacts, and just between two rotors, produces coupling torque; The coupling torque producing between two rotors drives driven rotor 4 and end-cover axle 5 to do and identical the rotatablely moving of power rotor 3 directions; After this, at driven axle sleeve 51 to load rotating shaft 6 output torques one regularly, between power rotor 3 and driven rotor 4, keep certain speed discrepancy, power rotor 3 is faster than driven rotor 4 rotating speeds all the time, the two remains does relative rotary motion, thereby maintaining all the time above-mentioned coupling process, between two rotors, reaching the object of transmitting motion and power.

In the course of work, the gravity of shaft coupling self, axial repulsive force between power rotor 3 and driven rotor 4 and from the motive power of load rotating shaft 6, pass to driven rotor body 41 through driven axle sleeve 51 and end cap 52, pass to again the solid shaft part 35 of power rotor axle 31 through driven bearing 42, due between the hollow shaft part 34 of power rotor axle 31 and motor rotary shaft 11 for there to be the moving of movement clearance to coordinate, so the external force that power rotor axle 31 bears mainly passes to the location bearing 24 that the lateral wall of hollow shaft part 34 is installed, be passed on B35 type motor front end boss 13 supports finally by positioning bearing seat 22 and end face positioning disk 21.

In the time there is suddenly heavy duty or stuck phenomenon in load rotating shaft 6; driven rotor 4 is significantly even stall of reduction of speed thereupon; between power rotor 3 and driven rotor 4, there is huge speed difference; now ring of eddy 46 can be subject to pointing to the axial thrust of end-cover axle 5 directions; thereby overcome the restoring force of thrust spring 44; promoting vortex rotor dish 45 and sliding shaft sleeve 43 moves to end-cover axle 5 directions; and then depart from coupling with the permanent magnet layer 33 of power rotor 3, reach and prevent that vortex rotor dish 45 from sharply generating heat, preventing the protective effect of motor 1 long term overloading.

Claims

1. A fixed single flat disc permanent magnet eddy current coupling with an end face is characterized in that it comprises a driving rotor, a driven rotor, an end face positioning seat and an end cover shaft; the driving rotor consists of a driving rotor shaft, a magnetic rotor disc and The magnetic rotor disk is fixed on the middle part of the outer wall of the active rotor shaft, and the permanent magnet layer is fixed on the end face of the magnetic rotor disk; the driven rotor is composed of a driven rotor body, a sliding bushing, a thrust spring, and an eddy current rotor. The driven rotor body and the driving rotor shaft of the driving rotor are connected by a driven bearing, the sliding bushing is arranged outside the driven rotor body, and the sliding bushing and the driven rotor body are connected by a guide key The eddy current rotor disk is fixed on the outer wall of the sliding sleeve; the eddy current ring is fixed on the inner end surface of the eddy current rotor disk, and the eddy current ring is set opposite to the permanent magnet layer of the active rotor, and there is a gap between the eddy current ring and the permanent magnet layer. There is a gap; the end face positioning seat is composed of an end face positioning plate and a positioning bearing seat fixed on the end face positioning plate, and a stepped notch is arranged on the outer end surface of the end face positioning plate; the positioning bearing seat and the active rotor shaft pass through The positioning bearing is connected; the bearing seat oil cup is arranged on the positioning bearing seat, and the bearing seat oil cup communicates with the interior of the positioning bearing through the bearing seat oil circuit arranged on the side wall of the positioning bearing seat; the end cover shaft is set on At the outer end of the driven rotor, the end cover shaft is composed of the end cover and the driven shaft or driven bushing fixed in the middle of the end cover. The driven shaft or driven bushing is coaxially arranged with the driving rotor shaft; The moving rotor body is fixedly connected; the thrust spring is set between the vortex rotor disc and the end cover; the end cover oil cup is arranged on the end cover, and the end cover oil cup passes through the end cover oil passage arranged on the driven rotor body and the end cover It communicates with the inside of the driven bearing.

2. The single flat disc permanent magnet eddy current coupling with fixed end face according to claim 1, characterized in that the permanent magnet layer is a ring-shaped structure composed of even groups of permanent magnet groups, and the permanent magnet groups Evenly distributed on the magnetic rotor disk along the circumference; each permanent magnet group is composed of several permanent magnet blocks, each permanent magnet group includes the same number of permanent magnet blocks, each permanent magnet block has the same structure, and the cross section is Rectangular, trapezoidal or fan-shaped, the magnetization direction of each permanent magnet block is the axial direction of the magnetic rotor disk; the magnetization polarity direction of the permanent magnet blocks in the same group of permanent magnet groups is the same, The direction of magnetization polarity is opposite; two adjacent permanent magnet groups are in close contact, or there is a gap, and non-magnetic isolation pads are filled in the gap.

3. The single flat plate permanent magnet eddy current coupling with fixed end face according to claim 1, characterized in that the eddy current ring is a circular flat plate, and the inner diameter of the eddy current ring is smaller than the inner diameter of the permanent magnet layer, and the eddy current ring The outer diameter is larger than the outer diameter of the permanent magnet layer.

4. The single flat disc permanent magnet eddy current coupling with fixed end face according to claim 1, characterized in that a spring shield is arranged on the edge of the end face of the end cover facing the thrust spring side, and the outer end of the thrust spring Set inside the spring guard.

5. The single-flat disc permanent magnet eddy current coupling with fixed end face according to claim 1, characterized in that a limit ring is arranged on the end face of the driven rotor body close to the magnetic rotor disc.