Magnetic coupling

Abstract

The utility model provides a magnetic coupling which comprises a first rotating piece (10), a second rotating piece (20) and a magnetic adjusting mechanism. The first rotating piece is provided with a plurality of first magnets (12) arranged around a first axis (R1). A plurality of second magnets (22) which are distributed around a second axis (R2) are arranged on the second rotating piece, the second rotating piece and the first rotating piece are arranged at intervals, the first axis and the second axis are parallel or overlapped, and when one of the first rotating piece and the second rotating piece rotates, the second magnets (22) are arranged around the second axis (R2). Magnetic force between the first magnets and the second magnets can drive the other one of the first rotating part and the second rotating part to rotate synchronously. The magnetic force adjusting mechanism can adjust the magnetic force between the first magnets and the second magnets. The magnetic coupling can be used in cooperation with the motor and adjust the load, shortens the starting acceleration time of the motor, reduces the starting temperature of the motor, and protects the motor.

Description

Technical Field

[0001] The utility model relates to the field of industrial transmission, in particular to a magnetic coupling. Background Art

[0002] A coupling is usually used in cooperation with a motor to output torque. When the motor starts, the current is very large, but the output torque is small. After the motor speed reaches a certain value, the torque increases significantly. After the current coupling is installed, the motor and the driven device enter the synchronous state. During the startup process of the motor, the rotational inertia of all driving loads and devices will be loaded onto the motor, prolonging the startup acceleration time of the motor. The temperature of the motor rises very quickly in the state of low speed and large current, which is likely to cause damage to the motor. Content of the Utility Model

[0003] The purpose of the utility model is to provide a magnetic coupling, which can be used in cooperation with a motor and adjust the load, shorten the startup acceleration time of the motor, reduce the startup temperature of the motor, and protect the motor.

[0004] The utility model provides a magnetic coupling, which includes a first rotating member, a second rotating member, and a magnetic force adjusting mechanism. The first rotating member can be connected to the motor shaft or the driven shaft, and several first magnets arranged around a first axis are provided on the first rotating member. The second rotating member can be connected to the motor shaft or the driven shaft, and several second magnets arranged around a second axis are provided on the second rotating member. The second rotating member is arranged at an interval with the first rotating member, and the first axis and the second axis are parallel or overlapped. When one of the first rotating member and the second rotating member rotates, the magnetic force between several first magnets and several second magnets can drive the other one of the first rotating member and the second rotating member to rotate synchronously. The magnetic force adjusting mechanism can adjust the magnitude of the magnetic force between several first magnets and several second magnets.

[0005] The magnetic coupling provided by the utility model can be used in cooperation with a motor. When the motor starts and accelerates, the magnetic force adjusting mechanism is used to reduce the magnetic force between the first magnets on the first rotating member and the second magnets on the second rotating member, thereby reducing the motor load and shortening the startup acceleration time of the motor. After the motor reaches the rated speed, the magnetic force adjusting mechanism is used to increase the magnetic force between the first magnets on the first rotating member and the second magnets on the second rotating member, thereby increasing the motor load until the first rotating member and the second rotating member rotate synchronously. The magnetic coupling provided by the utility model realizes the function of protecting the motor by shortening the startup acceleration time of the motor to reduce the startup temperature of the motor.

[0006] In still another illustrative embodiment of the magnetic coupling, the N poles and S poles of the first magnets are arranged in a direction perpendicular to the first axis, and the arrangement directions of the N poles and S poles of two adjacent first magnets are opposite. The N poles and S poles of the second magnets are arranged in a direction perpendicular to the second axis, and the arrangement directions of the N poles and S poles of two adjacent second magnets are opposite. A plurality of second magnets surround the outside of the plurality of first magnets, and each first magnet is opposite to a second magnet in a direction perpendicular to the first axis and the second axis.

[0007] In yet another illustrative embodiment of the magnetic coupling, the second rotating member includes a first transmission portion and a second transmission portion. The first transmission portion can be connected to the motor shaft or the driven shaft. The second transmission portion is movably disposed on the first transmission portion relative to the first transmission portion in a direction parallel to the second axis. A plurality of second magnets are disposed on the second transmission portion, and the second transmission portion can rotate synchronously with the first transmission portion about the second axis. The magnetic force adjustment mechanism includes a linear motor that can drive the second transmission portion to move relative to the first transmission portion in a direction parallel to the second axis, and adjusts the magnitude of the magnetic force between the plurality of first magnets and the plurality of second magnets by changing the magnetic field superposition range of the plurality of first magnets and the plurality of second magnets.

[0008] In another illustrative embodiment of the magnetic coupling, the magnetic force adjustment mechanism includes a plurality of electromagnets that surround the outside of the plurality of second magnets. The coils of the plurality of electromagnets can be energized to apply a magnetization field to the plurality of second magnets, and the magnitude of the magnetic force between the plurality of first magnets and the plurality of second magnets is adjusted by changing the magnetization intensity of the plurality of second magnets.

[0009] In another illustrative embodiment of the magnetic coupling, the N poles and S poles of the first magnets are arranged in a direction parallel to the first axis, and the arrangement directions of the N poles and S poles of two adjacent first magnets are opposite. The N poles and S poles of the second magnets are arranged in a direction parallel to the second axis, and the arrangement directions of the N poles and S poles of two adjacent second magnets are opposite. Each first magnet is opposite to a second magnet in a direction parallel to the first axis and the second axis.

[0010] In another illustrative embodiment of the magnetic coupling, the second rotating member includes a first transmission portion and a second transmission portion. The first transmission portion can be connected to the motor shaft or the driven shaft. The second transmission portion is movably disposed on the first transmission portion relative to the first transmission portion in a direction parallel to the second axis. A plurality of second magnets are disposed on the second transmission portion, and the second transmission portion can rotate synchronously with the first transmission portion about the second axis. The magnetic force adjustment mechanism includes a linear motor that can drive the second transmission portion to move relative to the first transmission portion, and adjusts the magnitude of the magnetic force between the plurality of first magnets and the plurality of second magnets by changing the distance between the plurality of first magnets and the plurality of second magnets.

[0011] In another schematic embodiment of the magnetic coupling, the magnetic force adjustment mechanism includes a plurality of electromagnets arranged around a second axis, and the plurality of electromagnets are disposed on a side of the plurality of second magnets away from the plurality of first magnets in a direction parallel to the second axis. The coils of the plurality of electromagnets can be energized to apply a magnetization field to the plurality of second magnets, and the magnitude of the magnetic force between the plurality of first magnets and the plurality of second magnets is adjusted by changing the magnetization intensity of the plurality of second magnets.

[0012] In another schematic embodiment of the magnetic coupling, the magnetic force adjustment mechanism includes a magnetic shielding member and a linear motor. The linear motor can drive the magnetic shielding member into the space between the plurality of first magnets and the plurality of second magnets, and the magnitude of the magnetic force between the plurality of first magnets and the plurality of second magnets is adjusted by changing the magnetic field superposition range shielded by the magnetic shielding member between the plurality of first magnets and the plurality of second magnets.

[0013] In another schematic embodiment of the magnetic coupling, both the first magnet and the second magnet are permanent magnets.

[0014] In another schematic embodiment of the magnetic coupling, both the first magnet and the second magnet are neodymium iron boron magnets.

[0015] In another schematic embodiment of the magnetic coupling, the first rotating member can be connected to the motor shaft or the driven shaft of a motor, a steam turbine, a gas turbine, and an expander, and the second rotating member can be connected to the motor shaft or the driven shaft of a motor, a steam turbine, a gas turbine, and an expander. Description of the Drawings

[0016] The following drawings only schematically illustrate and explain the present utility model, and do not limit the scope value of the present utility model.

[0017] Figure 1 It is a schematic cross-sectional structure diagram of a schematic embodiment of the magnetic coupling.

[0018] Figure 2 It is another schematic cross-sectional structure diagram of the magnetic coupling.

[0019] Figure 3 It is a schematic cross-sectional structure diagram of another usage state of the magnetic coupling.

[0020] Figure 4 It is a schematic cross-sectional structure diagram of another schematic embodiment of the magnetic coupling.

[0021] Figure 5 It is a schematic cross-sectional structure diagram of another schematic embodiment of the magnetic coupling.

[0022] Figure 6Schematic structural diagram of a first rotating member in a schematic implementation manner.

[0023] Figure 7 Cross-sectional structural diagram of another usage state of a magnetic coupling.

[0024] Figure 8 Cross-sectional structural diagram of another schematic implementation manner of a magnetic coupling.

[0025] Figure 9 Cross-sectional structural diagram of another schematic implementation manner of a magnetic coupling.

[0026] Figure 10 Cross-sectional structural diagram of another usage state of a magnetic coupling.

[0027] Reference numeral description

[0028] 10 First rotating member

[0029] 12 First magnet

[0030] 20 Second rotating member

[0031] 22 Second magnet

[0032] 24 First transmission part

[0033] 26 Second transmission part

[0034] 32 Linear motor

[0035] 34 Electromagnet

[0036] 36 Magnetic shielding member

[0037] R1 First axis

[0038] R2 Second axis Detailed implementation manners

[0039] For a clearer understanding of the technical features, objectives, and effects of the utility model, the detailed implementation manners of the utility model are now described with reference to the accompanying drawings. In each figure, the same reference numerals represent components with the same or similar structures but the same functions.

[0040] In this document, "schematic" means "serving as an example, instance, or illustration", and any illustration or implementation manner described as "schematic" in this document should not be construed as a more preferred or more advantageous technical solution.

[0041] In this document, "first", "second", etc. do not indicate their importance levels or orders, etc., but are only used to indicate their differences from each other for the convenience of document description.

[0042] For the sake of simplicity of the drawings, only the parts related to the present utility model are schematically shown in each figure, and they do not represent the actual structure of the product as a whole.

[0043] Figure 1 It is a schematic cross-sectional structure diagram of a schematic embodiment of a magnetic coupling. Refer to Figure 1 , the magnetic coupling includes a first rotating member 10, a second rotating member 20, and a magnetic force adjusting mechanism.

[0044] Figure 2 It is another schematic cross-sectional structure diagram of the magnetic coupling. Refer to Figure 1 and Figure 2 , the first rotating member 10 can be connected to the motor shaft or the driven shaft of a motor, a steam turbine, a gas turbine, and an expander. A plurality of first magnets 12 arranged around a first axis R1 are provided on the first rotating member 10.

[0045] Refer to Figure 1 and Figure 2 , the second rotating member 20 can be connected to the motor shaft or the driven shaft of a motor, a steam turbine, a gas turbine, and an expander. When the magnetic coupling is in use, if the first rotating member 10 is connected to the motor shaft, the second rotating member 20 is connected to the driven shaft, and if the first rotating member 10 is connected to the driven shaft, the second rotating member 20 is connected to the motor shaft, thereby realizing the torque output of the motor. A plurality of second magnets 22 arranged around a second axis R2 are provided on the second rotating member 20. The second rotating member 20 is spaced from the first rotating member 10, and the first axis R1 and the second axis R2 are parallel or overlapping. When one of the first rotating member 10 and the second rotating member 20 rotates, the magnetic force between the plurality of first magnets 12 and the plurality of second magnets 22 can drive the other of the first rotating member 10 and the second rotating member 20 to rotate synchronously.

[0046] In a schematic embodiment, the N poles and S poles of the first magnets 12 are arranged in a direction perpendicular to the first axis R1, and the arrangement directions of the N poles and S poles of two adjacent first magnets 12 are opposite. The N poles and S poles of the second magnets 22 are arranged in a direction perpendicular to the second axis R2, and the arrangement directions of the N poles and S poles of two adjacent second magnets 22 are opposite. A plurality of second magnets 22 surround the outside of a plurality of first magnets 12. Each first magnet 12 is opposite to a second magnet 22 in a direction perpendicular to the first axis R1 and the second axis R2, and the arrangement directions of the N poles and S poles are opposite, thereby generating magnetic forces and attracting each other. The first magnets 25 on both sides of the first magnet 12 and the opposite second magnet 22 generate magnetic forces and repel each other. The magnetic forces between the plurality of first magnets 12 and the plurality of second magnets 22 can drive the other one of the first rotating member 10 and the second rotating member 20 to rotate synchronously. The second rotating member 20 includes a first transmission portion 24 and a second transmission portion 26. The first transmission portion 24 can be connected to the motor shaft or the driven shaft of a motor, a steam turbine, a gas turbine, and an expander. The second transmission portion 26 is movably disposed on the first transmission portion 24 in a direction parallel to the second axis R2 relative to the first transmission portion 24. A plurality of second magnets 22 are disposed on the second transmission portion 26, and the second transmission portion 26 can rotate synchronously with the first transmission portion 24 about the second axis R2.

[0047] Figure 3 It is a schematic cross-sectional structure diagram of another use state of the magnetic coupling. Refer to Figure 1 and Figure 3 , the magnetic force adjusting mechanism can adjust the magnitude of the magnetic force between the plurality of first magnets 12 and the plurality of second magnets 22. In a schematic embodiment, the magnetic force adjusting mechanism includes a linear motor 32. The linear motor 32 can drive the second transmission portion 26 to move relative to the first transmission portion 24 in a direction parallel to the second axis R2, and adjust the magnitude of the magnetic force between the plurality of first magnets 12 and the plurality of second magnets 22 by changing the magnetic field superposition range between the plurality of first magnets 12 and the plurality of second magnets 22. When the motor starts, the linear motor 32 drives the second transmission portion 26 to move to the Figure 3 shown position. At this time, the magnetic field superposition range between the plurality of first magnets 12 and the plurality of second magnets 22 is the smallest, and the driving load applied to the motor and the moment of inertia of the equipment are the smallest. After the motor reaches the rated speed, the linear motor 32 drives the second transmission portion 26 to move to the Figure 1 shown position. At this time, the magnetic field superposition range between the plurality of first magnets 12 and the plurality of second magnets 22 is the largest, and the driving load and the moment of inertia of the equipment can be normally applied to the motor.

[0048] The magnetic coupling provided by the present utility model can be used in conjunction with an electric motor. When the electric motor starts and accelerates, the magnetic force adjusting mechanism is used to reduce the magnetic force between the first magnet 12 on the first rotating member 10 and the second magnet 22 on the second rotating member 20, thereby reducing the load on the electric motor and shortening the starting and accelerating time of the electric motor. After the electric motor reaches the rated speed, the magnetic force adjusting mechanism is used to increase the magnetic force between the first magnet 12 on the first rotating member 10 and the second magnet 22 on the second rotating member 20, thereby increasing the load on the electric motor until the first rotating member 10 and the second rotating member 20 rotate synchronously. The magnetic coupling provided by the present utility model realizes the function of protecting the electric motor by shortening the starting and accelerating time of the electric motor to reduce the starting temperature of the electric motor.

[0049] In the illustrative embodiment, both the first magnet 12 and the second magnet 22 are permanent magnets, specifically neodymium iron boron magnets. Neodymium iron boron magnets have excellent magnetic properties, and the magnetic field pulling force can reach 20 MPa. This can reduce the energy consumption of the magnetic coupling during use.

[0050] Figure 4 It is a schematic cross-sectional structure diagram of another illustrative embodiment of the magnetic coupling. Refer to Figure 4 , which is the same as or similar to the magnetic coupling in Figure 1 will not be described in detail. The difference is that the second rotating member 20 is an integral structure, and the magnetic force adjusting mechanism includes several electromagnets 34, and several electromagnets 34 are arranged around the outside of several second magnets 22. The coils of several electromagnets 34 can be energized to apply a magnetization field to several second magnets 22, and the magnitude of the magnetic force between several first magnets 12 and several second magnets 22 is adjusted by changing the magnetization intensity of several second magnets 22.

[0051] As shown in Figure 4 , when the magnetic coupling is actually used, a current with a rectangular wave needs to be generated according to the rotation position of the second rotating member 20. The height of the rectangular wave of this current corresponds to the intensity of magnetizing the second magnet 22, and the positive and negative values of this current correspond to the second magnets 22 with opposite N and S pole arrangements. Connecting the current with a rectangular wave to the coils of the electromagnets 34 can change the magnetic force of several second magnets 22 by magnetization. When the electric motor starts, the height of the rectangular wave of this current is adjusted to the minimum value, and the driving load applied to the electric motor and the moment of inertia of the equipment are the smallest. After the electric motor reaches the rated speed, the height of the rectangular wave of this current is adjusted to the maximum value, and the driving load applied to the electric motor and the moment of inertia of the equipment reach the maximum. After the first rotating member 10 and the second rotating member 20 rotate synchronously, the input of this current to the coils of the electromagnets 34 can be stopped. At this time, the driving load applied to the electric motor and the moment of inertia of the equipment are relatively small, and the first rotating member 10 and the second rotating member 20 can be maintained to rotate synchronously only by the magnetization intensity of the second magnet 22 itself.

[0052] Figure 5 A cross-sectional structural schematic diagram of another exemplary embodiment of a magnetic coupling. Figure 6 A structural schematic diagram of an exemplary embodiment of a first rotating member. Refer to Figure 5 and Figure 6 , which is the same as or similar to the magnetic coupling in Figure 1 and will not be described in detail. The difference is that the N poles and S poles of each first magnet 12 are arranged in a direction parallel to the first axis R1, and the arrangement directions of the N poles and S poles of two adjacent first magnets 12 are opposite. The N poles and S poles of each second magnet 22 are arranged in a direction parallel to the second axis R2, and the arrangement directions of the N poles and S poles of two adjacent second magnets 22 are opposite. Each first magnet 12 is opposite to a second magnet 22 in a direction parallel to the first axis R1 and the second axis R2, and the arrangement directions of the N poles and S poles are opposite, thereby generating a magnetic force and attracting each other. The first magnets 25 on both sides of the first magnet 12 and the opposite second magnet 22 generate a magnetic force and repel each other. The magnetic forces between several first magnets 12 and several second magnets 22 can drive the other one of the first rotating member 10 and the second rotating member 20 to rotate synchronously.

[0053] Figure 7 A cross-sectional structural schematic diagram of another use state of the magnetic coupling. Refer to Figure 5 and Figure 7 , the second rotating member 20 includes a first transmission part 24 and a second transmission part 26. The first transmission part 24 can be connected to the motor shaft or the driven shaft of a motor, a steam turbine, a gas turbine, and an expander. The second transmission part 26 is movably arranged on the first transmission part 24 relative to the first transmission part 24 in a direction parallel to the second axis R2. Several second magnets 22 are arranged on the second transmission part 26, and the second transmission part 26 can rotate synchronously with the first transmission part 24 around the second axis R2. The magnetic force adjustment mechanism includes a linear motor 32. The linear motor 32 can drive the second transmission part 26 to move relative to the first transmission part 24, and adjust the magnitude of the magnetic force between several first magnets 12 and several second magnets 22 by changing the distance between several first magnets 12 and several second magnets 22. When the motor starts, the linear motor 32 drives the second transmission part 26 to move to the position shown in Figure 5 , at this time, the distance between several first magnets 12 and several second magnets 22 is the largest, and the driving load applied to the motor and the moment of inertia of the equipment are the smallest. After the motor reaches the rated speed, the linear motor 32 drives the second transmission part 26 to move to the position shown in Figure 7 , at this time, the distance between several first magnets 12 and several second magnets 22 is the smallest, and the driving load and the moment of inertia of the equipment can be normally applied to the motor.

[0054] Figure 8A cross-sectional structural schematic diagram of another exemplary embodiment of a magnetic coupling. Refer to Figure 8 , which is the same as or similar to the magnetic coupling in Figure 5 will not be described in detail. The difference lies in that the second rotating member 20 is an integral structure, and the magnetic force adjustment mechanism includes several electromagnets 34. The several electromagnets 34 are arranged around the second axis R2, and the several electromagnets 34 are arranged on one side of the several second magnets 22 away from the several first magnets 12 along the direction parallel to the second axis R2. The coils of the several electromagnets 34 can be energized to apply a magnetization field to the several second magnets 22, and the magnitude of the magnetic force between the several first magnets 12 and the several second magnets 22 is adjusted by changing the magnetization intensity of the several second magnets 22.

[0055] As Figure 8 shown, when the magnetic coupling is actually used, a current with a rectangular wave needs to be generated according to the rotation position of the second rotating member 20. The height of the rectangular wave of this current corresponds to the intensity of magnetizing the second magnet 22, and the positive and negative values of this current correspond to the second magnets 22 with opposite N and S pole arrangement directions. Connecting the current with a rectangular wave to the coils of the electromagnets 34 can change the magnitude of the magnetic force of the several second magnets 22 through magnetization. When the motor starts, the height of the rectangular wave of this current is adjusted to the minimum value, and the driving load applied to the motor and the moment of inertia of the equipment are the smallest. After the motor reaches the rated speed, the height of the rectangular wave of this current is adjusted to the maximum value, and the driving load applied to the motor and the moment of inertia of the equipment reach the maximum. After the first rotating member 10 and the second rotating member 20 rotate synchronously, the input of this current to the coils of the electromagnets 34 can be stopped. At this time, the driving load applied to the motor and the moment of inertia of the equipment are relatively small, and the synchronous rotation of the first rotating member 10 and the second rotating member 20 can be maintained only by the magnetization intensity of the second magnet 22 itself.

[0056] Figure 9 A cross-sectional structural schematic diagram of another exemplary embodiment of a magnetic coupling. Figure 10 A cross-sectional structural schematic diagram of another use state of the magnetic coupling. Refer to Figure 9 and Figure 10 , the linear motor 32 can drive the magnetic shielding member 36 into the space between the several first magnets 12 and the several second magnets 22, and the magnetic field superposition range between the several first magnets 12 and the several second magnets 22 is changed. When the motor starts, the linear motor 32 drives the magnetic shielding member 36 to move to the position shown in Figure 9 , and the magnetic shielding member 36 shields most of the magnetic field superposition range between the several first magnets 12 and the several second magnets 22. At this time, the magnetic force between the several first magnets 12 and the several second magnets 22 is the smallest, and the driving load applied to the motor and the moment of inertia of the equipment are the smallest. After the motor reaches the rated speed, the linear motor 32 drives the magnetic shielding member 36 to move toFigure 10 At the position shown, the magnetic shielding member 36 does not shield the magnetic field superposition range between several first magnets 12 and several second magnets 22. At this time, the magnetic force between several first magnets 12 and several second magnets 22 is the largest, and the moment of inertia of the driving load and the device can be normally loaded onto the motor.

[0057] It should be understood that although this specification is described according to various embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0058] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent implementation or change made without departing from the technical spirit of the present invention, such as the combination, division, or repetition of features, should be included within the protection scope of the present invention.

Claims

1. Magnetic coupling, characterized in that: include: A first rotating member (10), the first rotating member (10) being capable of being connected to a motor shaft or a driven shaft, the first rotating member (10) being provided with a plurality of first magnets (12) arranged around a first axis (R1); a second rotating member (20), the second rotating member (20) being capable of being connected to a motor shaft or a driven shaft, the second rotating member (20) being provided with a plurality of second magnets (22) arranged around a second axis (R2), the second rotating member (20) being spaced apart from the first rotating member (10), and the first axis (R1) and the second axis (R2) being parallel or overlapping, and when one of the first rotating member (10) and the second rotating member (20) rotates, the magnetic force between the plurality of first magnets (12) and the plurality of second magnets (22) can drive the other of the first rotating member (10) and the second rotating member (20) to rotate synchronously; as well as A magnetic force adjustment mechanism, wherein the magnetic force adjustment mechanism is capable of adjusting the magnitude of the magnetic force between a plurality of the first magnets (12) and a plurality of the second magnets (22).

2. The magnetic coupling according to claim 1, characterized in that: The N pole and S pole of each first magnet (12) are arranged in a direction perpendicular to the first axis (R1), and the N pole and S pole of each adjacent two first magnets (12) are arranged in opposite directions; the N pole and S pole of each second magnet (22) are arranged in a direction perpendicular to the second axis (R2), and the N pole and S pole of each adjacent two second magnets (22) are arranged in opposite directions; a plurality of second magnets (22) surround the outside of a plurality of first magnets (12), and each first magnet (12) is opposite to a second magnet (22) in a direction perpendicular to the first axis (R1) and the second axis (R2).

3. The magnetic coupling according to claim 2, characterized in that: The second rotating member (20) comprises: A first transmission part (24), the first transmission part (24) being capable of connecting to a motor shaft or a driven shaft; and a second transmission part (26), the second transmission part (26) being arranged on the first transmission part (24) so ​​as to be movable relative to the first transmission part (24) in a direction parallel to the second axis (R2), a plurality of second magnets (22) being arranged on the second transmission part (26), and the second transmission part (26) being capable of rotating synchronously with the first transmission part (24) around the second axis (R2); The magnetic force adjustment mechanism comprises a linear motor (32), wherein the linear motor (32) is capable of driving the second transmission part (26) to move relative to the first transmission part (24) in a direction parallel to the second axis (R2), and adjusting the magnitude of the magnetic force between the plurality of first magnets (12) and the plurality of second magnets (22) by changing the overlapping range of the magnetic fields of the plurality of first magnets (12) and the plurality of second magnets (22).

4. The magnetic coupling according to claim 2, characterized in that: The magnetic force adjustment mechanism comprises a plurality of electromagnets (34), wherein the plurality of electromagnets (34) surround the outside of the plurality of second magnets (22), and the coils of the plurality of electromagnets (34) are capable of connecting current and applying a magnetizing field to the plurality of second magnets (22), thereby adjusting the magnitude of the magnetic force between the plurality of first magnets (12) and the plurality of second magnets (22) by changing the magnetizing intensity of the plurality of second magnets (22).

5. The magnetic coupling according to claim 1, characterized in that: The N pole and S pole of each of the first magnets (12) are arranged in a direction parallel to the first axis (R1), and the N poles and S poles of each adjacent two of the first magnets (12) are arranged in opposite directions; the N pole and S pole of each of the second magnets (22) are arranged in a direction parallel to the second axis (R2), and the N pole and S pole of each adjacent two of the second magnets (22) are arranged in opposite directions; each of the first magnets (12) and a second magnet (22) are opposite to each other in a direction parallel to the first axis (R1) and the second axis (R2).

6. The magnetic coupling according to claim 5, characterized in that: The second rotating member (20) comprises: A first transmission part (24), the first transmission part (24) being capable of connecting to a motor shaft or a driven shaft; and a second transmission part (26), the second transmission part (26) being arranged on the first transmission part (24) so ​​as to be movable relative to the first transmission part (24) in a direction parallel to the second axis (R2), a plurality of second magnets (22) being arranged on the second transmission part (26), and the second transmission part (26) being capable of rotating synchronously with the first transmission part (24) around the second axis (R2); The magnetic force adjustment mechanism comprises a linear motor (32), wherein the linear motor (32) is capable of driving the second transmission part (26) to move relative to the first transmission part (24), and adjusting the magnitude of the magnetic force between the plurality of first magnets (12) and the plurality of second magnets (22) by changing the distance between the plurality of first magnets (12) and the plurality of second magnets (22).

7. The magnetic coupling according to claim 5, characterized in that: The magnetic force adjustment mechanism comprises a plurality of electromagnets (34), wherein the plurality of electromagnets (34) are arranged around the second axis (R2), and the plurality of electromagnets (34) are arranged on a side of the plurality of second magnets (22) away from the plurality of first magnets (12) in a direction parallel to the second axis (R2), and the coils of the plurality of electromagnets (34) are capable of connecting current and applying a magnetizing field to the plurality of second magnets (22), and adjusting the magnitude of the magnetic force between the plurality of first magnets (12) and the plurality of second magnets (22) by changing the magnetizing intensity of the plurality of second magnets (22).

8. The magnetic coupling according to claim 5, characterized in that: The magnetic force adjustment mechanism comprises: a magnetic shield (36); A linear motor (32) is provided, wherein the linear motor (32) is capable of driving the magnetic shielding member (36) to enter between the plurality of first magnets (12) and the plurality of second magnets (22), and adjusting the magnitude of the magnetic force between the plurality of first magnets (12) and the plurality of second magnets (22) by changing the superposition range of the magnetic field between the plurality of first magnets (12) and the plurality of second magnets (22) shielded by the magnetic shielding member (36).

9. The magnetic coupling according to claim 1, characterized in that: The first magnet (12) and the second magnet (22) are both permanent magnets.

10. The magnetic coupling according to claim 9, characterized in that: The first magnet (12) and the second magnet (22) are both neodymium iron boron magnets.

11. The magnetic coupling according to claim 1, characterized in that: The first rotating member (10) can be connected to a motor shaft or a driven shaft of a motor, a steam turbine, a gas turbine and an expander, and the second rotating member (20) can be connected to a motor shaft or a driven shaft of a motor, a steam turbine, a gas turbine and an expander.

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