Parallel eddy current synchronous composite coupling

Abstract

A parallel eddy current synchronous composite coupling, comprising an outer rotor component and an inner rotor component. The outer rotor component includes: an outer rotor shaft sleeve, an outer rotor support disc, and an outer rotor magnetic conduction cylinder; the inner rotor component includes: an inner rotor shaft sleeve, an inner rotor support disc, and an inner rotor magnetic conduction cylinder; the synchronous group includes an outer rotor permanent magnet and an inner rotor permanent magnet; the outer rotor permanent magnet is arranged on the outer rotor magnetic conduction cylinder, and the inner rotor permanent magnet is arranged on the inner rotor magnetic conduction cylinder; the eddy current group includes an eddy current induction ring and an eddy current permanent magnet; the eddy current induction ring is arranged on the outer rotor magnetic conduction cylinder and the eddy current permanent magnet is arranged on the inner rotor magnetic conduction cylinder, or the eddy current induction ring is arranged on the inner rotor magnetic conduction cylinder and the eddy current permanent magnet is arranged on the outer rotor magnetic conduction cylinder. The present invention provides a coupling that can not only ensure the synchronous operation of the load and the motor, but also has a strong starting overload capacity, and can maintain the advantages of magnetic drive vibration reduction, anti-vibration, low alignment requirements, and anti-overload.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet couplings, and particularly to a multi-magnetic-circuit parallel eddy current synchronous composite coupling that can be started asynchronously under heavy load and operate synchronously. Background Art

[0002] As a non-mechanical connection transmission device, permanent magnet couplings have been widely used in recent years due to their vibration reduction, low alignment requirements, and anti-overload characteristics. By means of the magnetic induction principle between permanent magnets and eddy current rings, and between permanent magnets and permanent magnets, torque transmission between the prime mover and the working machine can be achieved.

[0003] Currently, the widely used permanent magnet synchronous couplings and permanent magnet eddy current couplings in the market both have the above advantages. However, due to their respective transmission characteristics, they have great limitations in heavy load or starting with load. Specifically, the permanent magnet synchronous coupling can force the load speed to be synchronized with the motor, with high power and torque transmission efficiency, and the transmission efficiency is 100%. However, its starting ability is poor, and it is easy to lose synchronization during overload, which may lead to demagnetization of the permanent magnets of the coupling and cause damage to the coupling. When starting with load or starting a load with a large moment of inertia, or when the load fluctuates greatly, to ensure reliable operation, it is necessary to greatly increase the power margin of the coupling. Technicians have conducted experiments. When the load is an air compressor, even when the designed power margin is increased to 3 times the rated load power, normal operation cannot be guaranteed. When applied to heavy-duty equipment with a large moment of inertia such as ball mills, it even needs to be increased to 5 times, and the start is still very reluctant. It needs to be increased to 8 to 10 times to effectively start. For the permanent magnet eddy current coupling, under the condition of product finalization, the greater the speed difference between the load and the motor, the greater the transmitted torque. Therefore, it has good starting ability with load. However, at the same time, since its transmitted torque depends on the speed difference, when the slip is smaller, the transmitted torque is smaller, and it is theoretically impossible to achieve synchronous operation between the load and the motor. At the limit of design, its speed difference still needs to be maintained at the level of 2% - 3%. That is to say, the permanent magnet eddy current coupling cannot drive the load to rotate synchronously with the motor, and there is a power loss of more than 2% during use. Summary of the Invention

[0004] The purpose of the present invention is to overcome the respective disadvantages of the existing permanent magnet synchronous coupling and permanent magnet eddy current coupling, and provide a coupling that can not only ensure synchronous operation between the load and the motor, but also has strong starting and overload capabilities, and can maintain the advantages of magnetic drive vibration reduction, anti-vibration, low alignment requirements, and anti-overload.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A parallel eddy current synchronous composite coupling includes an outer rotor component and an inner rotor component with coincident axes;

[0007] The outer rotor component includes: an outer rotor bushing, an outer rotor support disk, and an outer rotor magnetic conduction cylinder; the outer rotor support disk is installed on the outer rotor bushing, and the outer rotor magnetic conduction cylinder is disposed on the outer rotor support disk;

[0008] The inner rotor component includes: an inner rotor bushing, an inner rotor support disk, and an inner rotor magnetic conduction cylinder; the inner rotor support disk is installed on the inner rotor bushing, and the inner rotor magnetic conduction cylinder is disposed on the inner rotor support disk;

[0009] The parallel eddy current synchronous composite coupler further includes a synchronization group; the synchronization group includes an outer rotor permanent magnet and an inner rotor permanent magnet; the outer rotor permanent magnet is disposed on the outer rotor magnetic conduction cylinder, and the inner rotor permanent magnet is disposed on the inner rotor magnetic conduction cylinder;

[0010] The parallel eddy current synchronous composite coupler further includes an eddy current group; the eddy current group includes an eddy current induction ring and an eddy current permanent magnet; the eddy current induction ring is disposed on the outer rotor magnetic conduction cylinder and the eddy current permanent magnet is disposed on the inner rotor magnetic conduction cylinder, or the eddy current induction ring is disposed on the inner rotor magnetic conduction cylinder and the eddy current permanent magnet is disposed on the outer rotor magnetic conduction cylinder.

[0011] In one embodiment, the number of the synchronization group and the eddy current group is at least one each.

[0012] In one embodiment, both the outer rotor component and the inner rotor component are of a radial cylindrical structure.

[0013] In one embodiment, the inner rotor support disk and the inner rotor magnetic conduction cylinder are of an integral structure or a split structure.

[0014] In one embodiment, the eddy current induction ring is of a copper ring structure.

[0015] In one embodiment, outer rotor heat dissipation fins are installed on the outer rotor magnetic conduction cylinder.

[0016] In one embodiment, inner rotor heat dissipation fins are installed on the inner rotor magnetic conduction cylinder.

[0017] In one embodiment, the axial length of the eddy current permanent magnet is 10 mm shorter than the axial length of the eddy current induction ring, or the axial length of the eddy current permanent magnet is equal to the axial length of the eddy current induction ring.

[0018] In one embodiment, ventilation holes are provided on both the outer rotor support disk and the inner rotor support disk.

[0019] In one embodiment, both the synchronous group permanent magnets and the eddy current group permanent magnets are arranged with N and S poles alternating radially, and their magnetic gap surfaces are arranged with N and S phases alternating. The permanent magnets forming the magnetic poles can adopt a single-body structure or a Halbach array structure.

[0020] The object of the present invention is to overcome the respective disadvantages of the existing permanent magnet synchronous coupler and the permanent magnet eddy current coupler, and provide a coupler that can not only ensure the synchronous operation of the load and the motor, but also has a strong starting overload capacity, and can maintain the advantages of magnetic drive vibration reduction, anti-vibration, low centering requirements, and anti-overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 Structural diagram of a parallel eddy current synchronous composite coupler according to an embodiment of the present invention;

[0023] Figure 2 For Figure 1 Exploded view of the parallel eddy current synchronous composite coupler shown;

[0024] Figure 3 For Figure 1 Stereoscopic cross-sectional view of the parallel eddy current synchronous composite coupler shown;

[0025] Figure 4 For Figure 1 Embodiment 1 of the parallel eddy current synchronous composite coupler shown;

[0026] Figure 5 For Figure 1 Embodiment 2 of the parallel eddy current synchronous composite coupler shown;

[0027] Figure 6 For Figure 1 Embodiment 3 of the parallel eddy current synchronous composite coupler shown;

[0028] Figure 7 For Figure 1 Embodiment 4 of the parallel eddy current synchronous composite coupler shown;

[0029] Figure 8 For Figure 1 Embodiment 5 of the parallel eddy current synchronous composite coupler shown;

[0030] Figure 9For Figure 1 Embodiment Six of the Parallel Eddy Current Synchronous Composite Coupler shown;

[0031] Figure 10 For Figure 1 Embodiment Seven of the Parallel Eddy Current Synchronous Composite Coupler shown;

[0032] Figure 11 For Figure 1 Embodiment Eight of the Parallel Eddy Current Synchronous Composite Coupler shown;

[0033] Figure 12 The structure diagram of the actuator according to an embodiment of the present invention. Detailed Embodiment

[0034] For ease of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present invention can be understood more thoroughly and comprehensively.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] As Figure 1 And Figure 2 shown, the present invention discloses a parallel eddy current synchronous composite coupler 10, which includes an outer rotor component 100 and an inner rotor component 200 with coincident axes, and both the outer rotor component 100 and the inner rotor component 200 are of a radial cylindrical structure.

[0038] As Figure 3As shown in the figure, the outer rotor component 100 includes: an outer rotor bushing 110, an outer rotor support disk 120, and an outer rotor magnetic conduction cylinder 130. The outer rotor support disk 120 is mounted on the outer rotor bushing 110, and the outer rotor magnetic conduction cylinder 130 is disposed on the outer rotor support disk 120.

[0039] As Figure 3 shown in the figure, the inner rotor component 200 includes: an inner rotor bushing 210, an inner rotor support disk 220, and an inner rotor magnetic conduction cylinder 230. The inner rotor support disk 220 is mounted on the inner rotor bushing 210, and the inner rotor magnetic conduction cylinder 230 is disposed on the inner rotor support disk 220. Among them, the inner rotor support disk 220 and the inner rotor magnetic conduction cylinder 230 are of an integral structure or a split structure.

[0040] As Figure 2 and Figure 3 shown in the figure, the parallel eddy current synchronous composite coupler 10 further includes a synchronous group 300. The synchronous group 300 includes an outer rotor permanent magnet 310 and an inner rotor permanent magnet 320; the outer rotor permanent magnet 310 is disposed on the outer rotor magnetic conduction cylinder 130, and the inner rotor permanent magnet 320 is disposed on the inner rotor magnetic conduction cylinder 230.

[0041] As Figure 2 and Figure 3 shown in the figure, the parallel eddy current synchronous composite coupler 10 further includes an eddy current group 400. The eddy current group 400 includes an eddy current induction ring 410 and an eddy current permanent magnet 420; the eddy current induction ring 410 is disposed on the outer rotor magnetic conduction cylinder 130 and the eddy current permanent magnet 420 is disposed on the inner rotor magnetic conduction cylinder 230, or the eddy current induction ring 410 is disposed on the inner rotor magnetic conduction cylinder 230 and the eddy current permanent magnet 420 is disposed on the outer rotor magnetic conduction cylinder 130. Among them, the eddy current induction ring 410 is of a copper ring structure, and the induction ring preferably uses, but is not limited to, high-conductivity materials such as red copper.

[0042] The permanent magnets of the synchronous group (outer rotor permanent magnet 310, inner rotor permanent magnet 320) and the permanent magnets of the eddy current group (eddy current permanent magnet 420) are both arranged with N and S poles alternating radially, and their magnetic gap surfaces are arranged with N and S phases alternating, and the permanent magnets constituting the magnetic poles can adopt a single structure or a structure such as a Halbach array.

[0043] In addition, the number of the synchronous group 300 and the eddy current group 400 is at least one group each. For example, in a coupler, the number of the synchronous group 300 can be two groups, while the number of the eddy current group 400 is one group; another example is that in a coupler, the number of the eddy current group 400 can be two groups, while the number of the synchronous group 300 is one group. Of course, according to the actual situation, in a coupler, the number of the synchronous group 300 and the eddy current group 400 can be multiple groups and arranged in various forms of permutations and combinations.

[0044] Regarding the selection of the installation positions of the eddy current induction ring 410 and the eddy current permanent magnet 420, as well as the selection of the quantities of the synchronous group 300 and the eddy current group 400, the following specific implementation manners may be available:

[0045] In the first embodiment, as Figure 4 shown, the quantities of both the synchronous group 300 and the eddy current group 400 are one group; along the axial direction, the synchronous group 300 is arranged at a position close to the outer rotor support disc 120, and the eddy current group 400 is arranged at a position far from the outer rotor support disc 120; the eddy current induction ring 410 is arranged on the outer rotor magnetic conduction cylinder 130, and the eddy current permanent magnet 420 is arranged on the inner rotor magnetic conduction cylinder 230;

[0046] In the second embodiment, as Figure 5 shown, the quantities of both the synchronous group 300 and the eddy current group 400 are one group; along the axial direction, the synchronous group 300 is arranged at a position far from the outer rotor support disc 120, and the eddy current group 400 is arranged at a position close to the outer rotor support disc 120; the eddy current induction ring 410 is arranged on the outer rotor magnetic conduction cylinder 130, and the eddy current permanent magnet 420 is arranged on the inner rotor magnetic conduction cylinder 230;

[0047] In the third embodiment, as Figure 6 shown, the quantity of the synchronous group 300 is two groups, and the quantity of the eddy current group 400 is one group; along the axial direction, one group of the eddy current group 400 is located between the two groups of the synchronous group 300; the eddy current induction ring 410 is arranged on the outer rotor magnetic conduction cylinder 130, and the eddy current permanent magnet 420 is arranged on the inner rotor magnetic conduction cylinder 230;

[0048] In the fourth embodiment, as Figure 7 shown, the quantity of the synchronous group 300 is one group, and the quantity of the eddy current group 400 is two groups; along the axial direction, one group of the synchronous group 300 is located between the two groups of the eddy current group 400; the eddy current induction ring 410 is arranged on the outer rotor magnetic conduction cylinder 130, and the eddy current permanent magnet 420 is arranged on the inner rotor magnetic conduction cylinder 230;

[0049] In the fifth embodiment, as Figure 8 shown, the quantities of both the synchronous group 300 and the eddy current group 400 are one group; along the axial direction, the synchronous group 300 is arranged at a position close to the outer rotor support disc 120, and the eddy current group 400 is arranged at a position far from the outer rotor support disc 120; the eddy current induction ring 410 is arranged on the inner rotor magnetic conduction cylinder 230, and the eddy current permanent magnet 420 is arranged on the outer rotor magnetic conduction cylinder 130;

[0050] In the sixth embodiment, as Figure 9As shown, the number of the synchronous group 300 and the eddy current group 400 is one each; along the axial direction, the synchronous group 300 is arranged at a position far from the outer rotor support disk 120, and the eddy current group 400 is arranged at a position close to the outer rotor support disk 120; the eddy current induction ring 410 is arranged on the inner rotor magnetic conduction cylinder 230, and the eddy current permanent magnet 420 is arranged on the outer rotor magnetic conduction cylinder 130;

[0051] Embodiment Seven, as Figure 10 shown, the number of the synchronous group 300 is two, and the number of the eddy current group 400 is one; along the axial direction, one eddy current group 400 is located between the two synchronous groups 300; the eddy current induction ring 410 is arranged on the inner rotor magnetic conduction cylinder 230, and the eddy current permanent magnet 420 is arranged on the outer rotor magnetic conduction cylinder 130;

[0052] Embodiment Eight, as Figure 11 shown, the number of the synchronous group 300 is one, and the number of the eddy current group 400 is two; along the axial direction, one synchronous group 300 is located between the two eddy current groups 400; the eddy current induction ring 410 is arranged on the inner rotor magnetic conduction cylinder 230, and the eddy current permanent magnet 420 is arranged on the outer rotor magnetic conduction cylinder 130;

[0053] Of course, in addition to the eight embodiments listed above, according to the actual situation, in a coupling, the number of the synchronous group 300 and the eddy current group 400 can be multiple groups, and the axial arrangement order of the synchronous group 300 and the eddy current group 400 is not limited, and various forms of permutations and combinations can be carried out.

[0054] For better heat dissipation treatment, outer rotor heat dissipation fins are installed on the outer rotor magnetic conduction cylinder 130, and inner rotor heat dissipation fins are installed on the inner rotor magnetic conduction cylinder 230. Specifically, heat dissipation fins are installed on the back of the magnetic conduction cylinder of the rotor where the eddy current induction ring 410 is located, and the position of the heat dissipation fins corresponds to the position of the induction ring, but the length of the covered area is not limited to the area of the induction ring. Further, ventilation holes are provided on both the outer rotor support disk 120 and the inner rotor support disk 220, which can better achieve heat dissipation treatment.

[0055] In this embodiment, the axial length of the eddy current permanent magnet 420 is 10 mm shorter than the axial length of the eddy current induction ring 410, or the axial length of the eddy current permanent magnet 420 is equal to the axial length of the eddy current induction ring 410.

[0056] The parallel eddy current synchronous composite coupler 10 disclosed by the present invention has a radial structure as its main body. The inner and outer rotors are coaxial, and a synchronous group of one (or more than one) synchronous coupler structure and a vortex group of one (or more than one) permanent magnet eddy current coupler structure are axially arranged, thus forming an eddy current synchronous composite coupler. The synchronous group and the vortex group are arranged in parallel axially. When starting, since the load speed is zero and the slip is the largest, the vortex group provides a large starting torque due to the high slip. As the load speed increases, the slip gradually decreases until it approaches the cut-in speed of the synchronous group, and then the synchronous group gradually cuts in and enters the synchronous operation state. During normal operation, the load speed is the same as that of the motor. When the load fluctuates, the synchronous group has an overload capacity within a certain range. When the maximum torque of the synchronous group designed is not exceeded, the synchronous group still drives the synchronous operation. When the load fluctuation exceeds the maximum torque of the synchronous group, a slip occurs, and the vortex group continues to provide the torque generated by the differential speed until it returns to the cut-in speed of the synchronous group and the synchronous group takes effect again to enter the synchronous operation.

[0057] For the parallel eddy current synchronous composite coupler of the present invention, the vortex group plays a role during startup and has a large starting torque. After entering the synchronous state, since the speed difference of the vortex group is zero, it does not work and does not generate power loss either. Therefore, during normal synchronous operation, the transmission efficiency can still reach 100%.

[0058] The purpose of the present invention is to overcome the respective disadvantages of the existing permanent magnet synchronous coupler and permanent magnet eddy current coupler, and provide a coupler that can not only ensure the synchronous operation of the load and the motor, but also has a strong starting overload capacity, and can maintain the advantages of magnetic drive vibration reduction, anti-vibration, low centering requirements, and anti-overload.

[0059] The prior art (CN110120735A) discloses a permanent magnet soft starter. In order to achieve the adjustment between different operating states such as asynchronous soft start, synchronous operation, and soft stop, it is provided with an "actuating mechanism", and the "actuating mechanism" includes a servo motor 13, a reduction mechanism 14, a lead screw pair 15, and a fork 16. It can be clearly seen from the figure that the structure of the "actuating mechanism" is too simple. During the process of the lead screw pair 15 driving the fork 16 to reciprocate, the fork 16 will shake due to unbalanced force, which will ultimately affect the stability and accuracy of the operation of the entire starter. Therefore, it is necessary to further improve the "actuating mechanism".

[0060] As Figure 12 shown, the parallel eddy current synchronous composite coupler 10 of the present invention further includes an actuating mechanism 500, and the actuating mechanism 500 is used to drive the inner rotor component 200 to reciprocate along the axial direction. The actuating mechanism 500 includes: a dual-axis output motor 510, a seat body 520, a transmission lead screw 530, a left reciprocating moving sleeve 540, a right reciprocating moving sleeve 550, and a fork structure 560.

[0061] The transmission lead screw 530 is rotatably arranged on the seat body 520, and both ends of the double-shaft output motor 510 are respectively drivingly connected to both ends of the transmission lead screw 530 through a left-side reduction gear set 511 and a right-side reduction gear set 512.

[0062] The inner rings of the left reciprocating moving sleeve 540 and the right reciprocating moving sleeve 550 are screwed onto the rod body of the transmission lead screw 530. The left reciprocating moving sleeve 540 and the right reciprocating moving sleeve 550 are arranged at intervals. Guide bumps 501 are provided on both the left reciprocating moving sleeve 540 and the right reciprocating moving sleeve 550, and guide grooves 521 that cooperate with the guide bumps 501 are formed on the seat body 520.

[0063] The fork structure 560 has a socket part 561 and a connecting part 562. Both ends of the socket part 561 are respectively screwed onto the outer rings of the left reciprocating moving sleeve 540 and the right reciprocating moving sleeve 550, and the connecting part 562 is connected to the inner rotor component 200.

[0064] The actuator 500 further includes two stable strengthening structures 570. The two stable strengthening structures 570 are installed on the seat body 520 and are respectively connected to both ends of the transmission lead screw 530.

[0065] The stable strengthening structure 570 includes: a housing 571, an axial support bearing 572, and a radial support bearing 573. The axial support bearing 572 and the radial support bearing 573 are received in the housing 571, and the end of the transmission lead screw 530 is connected to the axial support bearing 572 and the radial support bearing 573.

[0066] Next, the working principle of the above actuator 500 will be described:

[0067] Both ends of the double-shaft output motor 510 respectively drive the transmission lead screw 530 to rotate through the left-side reduction gear set 511 and the right-side reduction gear set 512;

[0068] The rotating transmission lead screw 530 further drives the left reciprocating moving sleeve 540 and the right reciprocating moving sleeve 550 screwed onto its rod body to move along the seat body 520; it should be noted that by adaptively adjusting the inner thread lines of the left reciprocating moving sleeve 540 and the right reciprocating moving sleeve 550, the left reciprocating moving sleeve 540 and the right reciprocating moving sleeve 550 can be made to move synchronously in the same direction;

[0069] When the double-shaft output motor 510 rotates forward or backward, the left reciprocating moving sleeve 540 and the right reciprocating moving sleeve 550 can be made to reciprocate along the seat body 520;

[0070] The two ends of the socket part 561 of the fork structure 560 are respectively screwed with the outer rings of the left reciprocating sleeve 540 and the right reciprocating sleeve 550. In this way, the left reciprocating sleeve 540 and the right reciprocating sleeve 550 can drive the socket part 561 to reciprocate, and the socket part 561 further drives the inner rotor component 200 to reciprocate through the connecting part 562.

[0071] During the sudden start of the dual-axis output motor 510, the transmission lead screw 530 will also start suddenly. The suddenly started transmission lead screw 530 will have a huge impact inertia, and this impact inertia will cause the transmission lead screw 530 to vibrate. In severe cases, it will cause the transmission lead screw 530 to break and other components connected to the transmission lead screw 530 to be damaged. In order to reduce the influence brought by this impact inertia, the actuator 500 in the present invention further includes two stabilizing and strengthening structures 570, and the two stabilizing and strengthening structures 570 are installed on the seat body 520 and are respectively connected to the two ends of the transmission lead screw 530.

[0072] At the moment when the transmission lead screw 530 suddenly starts, the axial support bearing 572 and the radial support bearing 573 respectively bear the impact forces of the transmission lead screw 530 in the axial direction and the radial direction, and the axial support bearing 572 and the radial support bearing 573 firmly hold the end of the transmission lead screw 530.

[0073] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A parallel - type eddy - current synchronous composite coupling, characterized in that, it includes an outer rotor component and an inner rotor component with coincident axes; The outer rotor component includes: an outer rotor bushing, an outer rotor support disk, and an outer rotor magnetic - conducting cylinder; the outer rotor support disk is installed on the outer rotor bushing, and the outer rotor magnetic - conducting cylinder is arranged on the outer rotor support disk; The inner rotor component includes: an inner rotor bushing, an inner rotor support disk, and an inner rotor magnetic - conducting cylinder; the inner rotor support disk is installed on the inner rotor bushing, and the inner rotor magnetic - conducting cylinder is arranged on the inner rotor support disk; The parallel - type eddy - current synchronous composite coupling further includes a synchronous group; the synchronous group includes an outer - rotor permanent magnet and an inner - rotor permanent magnet; the outer - rotor permanent magnet is arranged on the outer rotor magnetic - conducting cylinder, and the inner - rotor permanent magnet is arranged on the inner rotor magnetic - conducting cylinder; The parallel - type eddy - current synchronous composite coupling further includes an eddy - current group; the eddy - current group includes an eddy - current induction ring and an eddy - current permanent magnet; the eddy - current induction ring is arranged on the outer rotor magnetic - conducting cylinder and the eddy - current permanent magnet is arranged on the inner rotor magnetic - conducting cylinder, or the eddy - current induction ring is arranged on the inner rotor magnetic - conducting cylinder and the eddy - current permanent magnet is arranged on the outer rotor magnetic - conducting cylinder; The permanent magnets of the synchronous group and the permanent magnets of the eddy - current group are both arranged with N and S poles alternating radially, and their magnetic - gap surfaces are arranged with N and S phases alternating.

2. The parallel - type eddy - current synchronous composite coupling according to claim 1, characterized in that, the number of the synchronous group and the eddy - current group is at least one each.

3. The parallel - type eddy - current synchronous composite coupling according to claim 1, characterized in that, both the outer rotor component and the inner rotor component are of a radial cylindrical structure.

4. The parallel - type eddy - current synchronous composite coupling according to claim 1, characterized in that, the inner rotor support disk and the inner rotor magnetic - conducting cylinder are of an integral structure or a split structure.

5. The parallel - type eddy - current synchronous composite coupling according to claim 1, characterized in that, the eddy - current induction ring is of a copper - ring structure.

6. The parallel - type eddy - current synchronous composite coupling according to claim 1, characterized in that, outer rotor heat - dissipating fins are installed on the outer rotor magnetic - conducting cylinder.

7. The parallel - type eddy - current synchronous composite coupling according to claim 1, characterized in that, inner rotor heat - dissipating fins are installed on the inner rotor magnetic - conducting cylinder.

8. The parallel - type eddy - current synchronous composite coupling according to claim 1, characterized in that, the axial length of the eddy - current permanent magnet is 10 mm shorter than the axial length of the eddy - current induction ring, or the axial length of the eddy - current permanent magnet is equal to the axial length of the eddy - current induction ring.

9. The parallel - type eddy - current synchronous composite coupling according to claim 1, characterized in that, ventilation holes are provided on both the outer rotor support disk and the inner rotor support disk.

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