CN214380591U - Sleeve type torque-limiting permanent magnet coupler - Google Patents
Sleeve type torque-limiting permanent magnet coupler Download PDFInfo
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- CN214380591U CN214380591U CN202022643567.4U CN202022643567U CN214380591U CN 214380591 U CN214380591 U CN 214380591U CN 202022643567 U CN202022643567 U CN 202022643567U CN 214380591 U CN214380591 U CN 214380591U
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Abstract
The utility model discloses a sleeve type torque-limiting permanent magnet coupler, which comprises a conductor rotor and a permanent magnet rotor, wherein the conductor rotor comprises a conductor cylinder and a conductor ring arranged on the inner circumferential surface of the conductor cylinder; the permanent magnet rotor comprises a permanent magnet cylinder, a magnet seat, a permanent magnet, a connecting rod and a limiting block; the conductor rotor and the permanent magnet rotor are concentrically sleeved and separated by an air gap; the conductor ring is opposite to the permanent magnet; the permanent magnet is arranged in the magnetic seat, one end of the connecting rod is connected with the magnetic seat, the other end of the connecting rod is connected with the limiting block, and the connecting rod penetrates through the hole on the circumferential surface of the permanent magnet cylinder along the radial direction and can freely move on the permanent magnet cylinder along the radial direction; the position of the connecting rod is limited by the limiting block, so that the connecting rod is connected with the permanent magnet barrel; when overload occurs, the permanent magnet slides to the permanent magnet cylinder through the connecting rod, so that the motion transmission between the permanent magnet rotor and the conductor rotor is cut off; the utility model discloses simple structure, stability is good, and the simple installation need not remove the prime mover basis, suitable using widely.
Description
Technical Field
The utility model relates to a permanent magnetism transmission equipment field, in particular to telescopic limit for moment type coupler.
Background
The permanent magnet coupler mainly comprises a conductor rotor and a permanent magnet rotor, the conductor rotor is usually connected with a prime motor, the permanent magnet rotor is connected with a load, power is transmitted through interaction between a magnetic field of the permanent magnet rotor and an induction magnetic field of the conductor rotor, the prime motor is not mechanically connected with the load, and the permanent magnet coupler has the advantages of flexible starting, vibration isolation, energy conservation, environmental protection and the like. However, when the load is overloaded, locked or stuck, the slip between the conductor rotor and the permanent magnet rotor is rapidly increased, and a large amount of heat is generated in a short time, so that the demagnetization of the magnet and the failure of the binder are caused, and serious consequences are brought. Therefore, a torque-limiting permanent magnet coupler is provided, and when the transmission torque is too large, the conductor rotor and the permanent magnet rotor are separated, so that the transmission of power between a prime motor and a load is disconnected, and overload protection is realized. At present, most torque-limiting permanent magnet couplers are composed of a plurality of groups of conductor rotors and permanent magnet rotors, and have the problems of complex structure, heavy equipment weight, large volume, difficult installation and debugging, poor stability, long axial length and the like, and a prime motor is generally required to be moved backwards to meet the installation space, so that the application occasions are limited.
Disclosure of Invention
The utility model aims at providing a telescopic limit for moment type permanent magnet coupler to the problem that prior art exists, its aim at: the structure of the torque-limiting permanent magnet coupler is simplified, the reliability is improved, and the mounting is convenient.
The utility model aims at solving through the following technical scheme:
a sleeve type torque-limiting permanent magnet coupler comprises a conductor rotor and a permanent magnet rotor, and is characterized in that: the conductor rotor comprises a conductor cylinder and a conductor ring arranged on the inner circumferential surface of the conductor cylinder; the permanent magnet rotor comprises a permanent magnet cylinder, a magnet seat, a permanent magnet, a connecting rod and a limiting block; the conductor rotor and the permanent magnet rotor are concentrically sleeved and separated by an air gap; the conductor ring is opposite to the permanent magnet; the permanent magnet is arranged in the magnetic seat, one end of the connecting rod is connected with the magnetic seat, the other end of the connecting rod is connected with the limiting block, and the connecting rod penetrates through a hole on the circumferential surface of the permanent magnet cylinder along the radial direction and can freely move on the permanent magnet cylinder along the radial direction; the position of the connecting rod is limited by the limiting block, so that the connecting rod is connected with the permanent magnet barrel.
The magnetic seat, the permanent magnet, the connecting rod and the limiting block form assemblies, the number of the assemblies is 2n, and the assemblies are uniformly distributed along the circumferential direction of the permanent magnet cylinder.
The magnetic field direction of the permanent magnet is radial, and the permanent magnet is arranged along the circumferential direction of the permanent magnet cylinder in a polarity alternating mode.
The permanent magnets are arranged in a Halbach array mode along the circumferential direction of the permanent magnet cylinder.
The shape of the permanent magnet includes but is not limited to cuboid, tile shape and cylindrical.
The cross-sectional shape of the connecting rod includes, but is not limited to, oval, square and polygonal.
When the sleeve type torque-limiting permanent magnet coupler is used, the permanent magnet is close to the conductor rotor under the action of attractive force and centrifugal force between the permanent magnet and the conductor cylinder, the conductor ring cuts magnetic lines of force of the permanent magnet to generate an induced magnetic field, axial repulsive force generated by the induced magnetic field and the magnetic field of the permanent magnet is smaller than the attractive force and the centrifugal force, resultant force is the attractive force, the permanent magnet is still close to the conductor rotor, and circumferential force generated by the induced magnetic field and the magnetic field of the permanent magnet drives a load to operate; when the load is locked, locked or overloaded, the rotating speed difference between the conductor rotor and the permanent magnet rotor is increased, the axial repulsion force generated by the induction magnetic field of the conductor ring and the magnetic field of the permanent magnet is instantly increased, the resultant force is repulsion force, the permanent magnet is pushed to the permanent magnet cylinder along the radial direction, the gap between the permanent magnet and the conductor ring is increased, no power is transmitted, the prime motor runs in a no-load mode, and overload protection is completed.
Compared with the prior art, the utility model has the following advantages:
the utility model relates to a telescopic limit for moment type permanent magnet coupler permanent magnet passes through the connecting rod and links to each other with a permanent magnetism section of thick bamboo to can along radial removal, change and conductor rotor between the clearance size. When the permanent magnet works normally, the permanent magnet approaches to the conductor rotor by utilizing the attraction force, so that the power is transmitted; when overload, locked rotor, jamming and other conditions occur, the repulsive force is used for keeping away from the conductor rotor, and the transmission of the power is cut off; after the fault is processed, the prime motor can be quickly restarted to recover the operation, the frequent starting can be realized, and the automatic overload protection is realized. The novel motor is simple in structure, smaller in size, lighter in weight, good in stability, simple and convenient to install, free of occupying too much space, free of moving a prime mover foundation and suitable for popularization and use.
Drawings
Fig. 1 is a schematic diagram of the sleeve type torque-limiting permanent magnet coupler of the present invention in normal operation;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic diagram of the overload or locked-rotor sleeve-type torque-limiting permanent magnet coupler of the present invention;
FIG. 4 is a cross-sectional view B-B of FIG. 3;
wherein: 1-a conductor rotor; 11-a conductor cylinder; 12-a conductor loop; 2-a permanent magnet rotor; 21-permanent magnetic cylinder; 22-a magnetic base; 23-a permanent magnet; 24-a connecting rod; 25-a limiting block.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1-4, a sleeve-type torque-limiting permanent magnet coupler includes a conductor rotor (1) and a permanent magnet rotor (2). The conductor rotor (1) includes a conductor cylinder (11) and a conductor ring (12) provided on the inner circumferential surface of the conductor cylinder (11). The permanent magnet rotor (2) comprises a permanent magnet cylinder (21), a magnet seat (22), a permanent magnet (23), a connecting rod (24) and a limiting block (25). The conductor rotor (1) and the permanent magnet rotor (2) are concentrically sleeved and separated by an air gap; the conductor ring (12) is opposite to the permanent magnet (23); the permanent magnet (23) is arranged in the magnetic seat (22), one end of the connecting rod (24) is connected with the magnetic seat (22), the other end of the connecting rod is connected with the limiting block (25), and the connecting rod (24) penetrates through the hole on the circumferential surface of the permanent magnet cylinder (21) along the radial direction and can freely move on the permanent magnet cylinder along the radial direction; the position of the connecting rod (24) is limited by the limiting block (25), so that the connecting rod (24) is connected with the permanent magnet cylinder (21). The magnetic seat (22), the permanent magnet (23), the connecting rod (24) and the limiting block (25) form assemblies, the number of the assemblies is 2n, and the assemblies are uniformly distributed along the circumferential direction of the permanent magnet cylinder (21). The shape of the permanent magnet (23) includes, but is not limited to, a rectangular parallelepiped, a tile shape, and a cylindrical shape. The cross-sectional shape of the link (24) includes, but is not limited to, oval, square, and polygonal.
During normal operation, as shown in fig. 1 and 2, the permanent magnet (23) is close to the conductor rotor (1) under the action of attractive force and centrifugal force between the permanent magnet and the conductor cylinder (11), the conductor ring (12) cuts magnetic lines of force of the permanent magnet (23) to generate an induced magnetic field, axial repulsion force generated by the induced magnetic field and the magnetic field of the permanent magnet (23) is smaller than the attractive force and the centrifugal force, resultant force is the attractive force, the permanent magnet (23) is still close to the conductor rotor (1), and circumferential force generated by the induced magnetic field and the magnetic field of the permanent magnet (23) drives a load to operate
When the load is locked, locked or overloaded, as shown in fig. 3 and 4, the difference between the rotating speeds of the conductor rotor (1) and the permanent magnet rotor (2) is increased, the axial repulsion force generated by the induction magnetic field of the conductor ring (12) and the magnetic field of the permanent magnet (23) is instantly increased, the resultant force is repulsion force, the permanent magnet (23) is pushed to the permanent magnet cylinder (21) along the radial direction, the gap between the permanent magnet (23) and the conductor ring (12) is increased, no power is transmitted, the prime motor runs in no-load mode, and overload protection is completed.
As an embodiment, the magnetic field direction of the permanent magnet (23) is radial, and the permanent magnet is arranged in a polarity alternating mode along the circumferential direction of the permanent magnet cylinder (21).
As an embodiment, the permanent magnets (23) are arranged in a Halbach array along the circumferential direction of the permanent magnet cylinder (21), so that a stronger magnetic field can be provided on the same cylinder size, a larger moment is generated, and the utilization rate of the permanent magnet (3) is improved.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea of the present invention all fall within the protection scope of the present invention; the technology not related to the utility model can be realized by the prior art.
Claims (6)
1. A sleeve type torque-limiting permanent magnet coupler comprises a conductor rotor (1) and a permanent magnet rotor (2), and is characterized in that: the conductor rotor (1) comprises a conductor cylinder (11) and a conductor ring (12) arranged on the inner circumferential surface of the conductor cylinder (11); the permanent magnet rotor (2) comprises a permanent magnet cylinder (21), a magnet seat (22), a permanent magnet (23), a connecting rod (24) and a limiting block (25); the conductor rotor (1) and the permanent magnet rotor (2) are concentrically sleeved and separated by an air gap; the conductor ring (12) is opposite to the permanent magnet (23); the permanent magnet (23) is arranged in the magnetic seat (22), one end of the connecting rod (24) is connected with the magnetic seat (22), the other end of the connecting rod is connected with the limiting block (25), and the connecting rod (24) penetrates through the hole on the circumferential surface of the permanent magnet cylinder (21) along the radial direction and can freely move on the permanent magnet cylinder along the radial direction; the position of the connecting rod (24) is limited by the limiting block (25), so that the connecting rod (24) is connected with the permanent magnet cylinder (21).
2. The sleeve torque-limiting permanent magnet coupler of claim 1, wherein: the permanent magnet comprises a magnetic seat (22), permanent magnets (23), connecting rods (24) and limiting blocks (25), wherein the number of the components is 2n, and the components are uniformly distributed along the circumferential direction of a permanent magnet cylinder (21).
3. The sleeve torque-limiting permanent magnet coupler of claim 1, wherein: the magnetic field direction of the permanent magnet (23) is parallel to the radial direction of the permanent magnet cylinder (21), and the permanent magnet cylinder is alternately arranged along the circumferential direction of the permanent magnet cylinder (21) in a polarity mode.
4. The sleeve torque-limiting permanent magnet coupler of claim 1, wherein: the permanent magnets (23) are arranged in a Halbach array mode along the circumferential direction of the permanent magnet cylinder (21).
5. The sleeve torque-limiting permanent magnet coupler of claim 1, wherein: the shape of the permanent magnet (23) includes but is not limited to cuboid, tile shape and cylindrical shape.
6. The sleeve torque-limiting permanent magnet coupler of claim 1, wherein: the cross-sectional shape of the connecting rod (24) includes but is not limited to oval, square and polygon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022643567.4U CN214380591U (en) | 2020-11-16 | 2020-11-16 | Sleeve type torque-limiting permanent magnet coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022643567.4U CN214380591U (en) | 2020-11-16 | 2020-11-16 | Sleeve type torque-limiting permanent magnet coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214380591U true CN214380591U (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022643567.4U Active CN214380591U (en) | 2020-11-16 | 2020-11-16 | Sleeve type torque-limiting permanent magnet coupler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214380591U (en) |
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2020
- 2020-11-16 CN CN202022643567.4U patent/CN214380591U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A sleeve type moment limiting permanent magnet coupler Effective date of registration: 20220923 Granted publication date: 20211008 Pledgee: Nanjing Zidong sub branch of Bank of Nanjing Co.,Ltd. Pledgor: NANJING ALING ENERGY EFFICIENCY TECH. CO.,LTD. Registration number: Y2022980016131 |