Torque-limiting permanent magnet coupler

Abstract

The utility model relates to a torque-limiting permanent magnet coupler, comprising a connecting shaft, the left side of the connecting shaft is fixedly connected with a magnetic steel rotor, the outer side of the magnetic steel rotor is fixedly connected with a speed regulation disc type structure, the right side of the connecting shaft is fixedly connected with a controller, and the right side of the controller is fixedly connected with a rear auxiliary cavity. And the right side of the rear auxiliary cavity is fixedly connected with a load end. According to the torque-limiting permanent magnet coupler, air flow in the support can be effectively improved through the arrangement of the speed regulation disc type structure, the effect of a fan can be achieved in cooperation with the arrangement of the impeller, heat in the turbine can be conveniently dissipated along with air flow, heat dissipation of the permanent magnets of the magnet tray is helped, and the cooling effect is achieved; the permanent magnet is prevented from being reduced or losing magnetism due to too high working temperature, meanwhile, the temperature of the turbine and the assembly inner sleeve assembly is effectively reduced, the energy loss and the maintenance cost are reduced, the transmission efficiency of a system is improved, and the coupler integrally has good torque control performance.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet couplers, in particular to a torque-limited permanent magnet coupler. Background Art

[0002] The permanent magnet coupler is a transmission element that works according to Faraday's law of electromagnetic induction. The disc-type torque-limiting permanent magnet coupler consists of an outer rotor and an inner rotor. The outer rotor has two conductor discs and a connecting bracket that are tightly connected as a rotating whole, and the inner rotor consists of a permanent magnet, a solid disk and a square shaft. Its working principle is: when the inner rotor solid disk body and the outer rotor make relative rotational motion, the outer rotor conductor disc cuts the magnetic lines of force of the permanent magnet and generates eddy currents, thereby inducing a resisting magnetic field. The induced magnetic field of the conductor disc interacts with the original magnetic field of the permanent magnet, thereby realizing the transmission of torque.

[0003] The main measure to control the rise of the working temperature of the permanent magnet coupler in the prior art is to install a heat sink on the outside of the induction disk (i.e., the conductor disk) to increase the heat dissipation area through the heat sink to control the rise of its working temperature. However, this has no direct effect on the heat dissipation of the permanent magnet, and its heat dissipation effect is not ideal. When the temperature is too high, the magnetism of the permanent magnet will be reduced or lost, affecting the use of the coupler. For this reason, we propose a torque-limited permanent magnet coupler. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a torque-limited permanent magnetic coupler, which has the advantages of good heat dissipation effect and good transmission efficiency, and solves the problem of magnet loss of magnetism due to poor heat dissipation effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a torque-limited permanent magnet coupler, comprising a connecting shaft, a magnetic steel rotor is fixedly connected to the left side of the connecting shaft, a speed regulating disc structure is fixedly connected to the outer side of the magnetic steel rotor, a controller is fixedly connected to the right side of the connecting shaft, a rear auxiliary cavity is fixedly connected to the right side of the controller, a load end is fixedly connected to the right side of the rear auxiliary cavity, and a locking disc is fixedly connected to the outer side of the load end;

[0006] The speed regulating disc structure includes an assembled inner sleeve, the outer side of the magnetic steel rotor is fixedly connected to the assembled inner sleeve, the interior of the assembled inner sleeve is movably connected to a turbine, the interior of the turbine is fixedly connected to an impeller, the interior of the assembled inner sleeve is movably connected to a copper disk, the right side of the copper disk is movably connected to a magnet tray, and a permanent magnet is arranged inside the magnet tray.

[0007] Furthermore, a conductor rotor is movably connected to the outer side of the connecting shaft, an air gap retaining block is provided on the outer side of the conductor rotor, a steel disk is fixedly connected to the outer side of the conductor rotor, a copper ring is fixedly connected to the outer side of the steel disk, a bearing is fixedly connected to the inner side of the steel disk, and a motor end is fixedly connected to the inner side of the bearing.

[0008] Furthermore, a magnet hole is opened on the outer side of the magnet tray, and a permanent magnet is fixedly connected to the magnet hole; an assembly column is fixedly connected to the inside of the assembly inner sleeve, and the magnet tray is movably connected to the outer side of the assembly column.

[0009] Furthermore, a movable groove is provided on the left side of the assembly inner sleeve, and the size of the movable groove is adapted to the size of the turbine. The turbine as a whole is a turbine disk with an arc groove, and 20 impellers are fixedly connected therein and are equidistantly distributed around the circumference.

[0010] Furthermore, the load end is connected to the connecting shaft through the rear auxiliary cavity and the controller, and the outer sides of the load end and the motor end are fixedly connected with locking disks.

[0011] Furthermore, a connection hole is opened on the left side of the steel disk, and a bolt is threadedly connected inside the connection hole, bolts are threadedly connected on both sides of the air gap retaining block, and the conductor rotor is connected to the air gap retaining block through the steel disk.

[0012] Furthermore, steel disks are fixedly connected to both sides of the air gap retaining block, a magnetic steel rotor is movably connected between the two steel disks, and the connecting shaft is connected to the assembly inner sleeve through the magnetic steel rotor.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The torque-limited permanent magnet coupler can effectively improve the air flow in the bracket by setting a speed regulating disc structure. It can play the role of a fan in conjunction with the setting of the impeller, making it easier for the heat in the turbine to be dissipated with the airflow, helping the permanent magnets of the magnet tray to dissipate heat, thereby achieving a cooling effect and preventing the permanent magnets from being reduced or losing their magnetism due to excessively high operating temperatures. At the same time, it effectively reduces the temperature of the turbine and the inner sleeve assembly, thereby allowing the superconducting coils generated in the air gap to remain in a superconducting state during operation.

[0015] 2. The torque-limited permanent magnet coupler adopts a purely mechanical structure by setting a steel disk and a conductor rotor, which will not be affected by electromagnetic interference. At the same time, the magnetic properties between the magnets can achieve long-term stable operation. At the same time, through the form of non-direct contact between the conductor rotor and the permanent magnet, by borrowing the characteristics of non-contact transmission, there is no mechanical friction and wear, which reduces energy loss and maintenance costs, and realizes efficient energy transmission, improves the transmission efficiency of the system, and makes the coupler as a whole have better torque control performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the overall appearance of the utility model;

[0017] Figure 2 This is the overall front view of the utility model;

[0018] Figure 3 It is a three-dimensional exploded diagram of the speed regulating disc structure of the utility model.

[0019] In the figure: 1. connecting shaft; 2. magnetic steel rotor; 3. speed regulating disc structure; 301. assembly inner sleeve; 302. turbine; 303. impeller; 304. copper disc; 305. magnet tray; 306. permanent magnet; 4. controller; 5. rear auxiliary cavity; 6. load end; 7. locking disc; 8. conductor rotor; 9. air gap retaining block; 10. steel disc; 11. copper ring; 12. bearing; 13. motor end. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 In this embodiment, a torque-limiting permanent magnetic coupler includes a connecting shaft 1, a magnetic steel rotor 2 is fixedly connected to the left side of the connecting shaft 1, a speed regulating disc structure 3 is fixedly connected to the outer side of the magnetic steel rotor 2, a controller 4 is fixedly connected to the right side of the connecting shaft 1, a rear auxiliary cavity 5 is fixedly connected to the right side of the controller 4, a load end 6 is fixedly connected to the right side of the rear auxiliary cavity 5, and a locking disc 7 is fixedly connected to the outer side of the load end 6;

[0022] The speed regulating disc structure 3 includes an assembly inner sleeve 301, the outer side of the magnetic steel rotor 2 is fixedly connected with the assembly inner sleeve 301, the interior of the assembly inner sleeve 301 is movably connected with a turbine 302, the interior of the turbine 302 is fixedly connected with an impeller 303, the interior of the assembly inner sleeve 301 is movably connected with a copper disk 304, the right side of the copper disk 304 is movably connected with a magnet tray 305, and the interior of the magnet tray 305 is provided with a permanent magnet 306.

[0023] When implementing it, Figure 3As shown, when the motor drives the conductor rotor 8 to rotate, since the copper ring 11 conductor cuts the magnetic lines of force, a closed induced current will be generated on the copper ring 11 conductor. The induced magnetic field generated by the induced current is coupled with the permanent magnetic field (magnet tray 305, permanent magnet 306), generating an interaction force and then generating a torque. When the size of the air gap changes, the interaction force between the induced magnetic field and the permanent magnetic field changes accordingly, which will result in a change in the slip and the transmitted torque. When the air gap becomes smaller, the air gap magnetic density increases, resulting in an increase in the force and a decrease in the slip. When the air gap increases, the air gap magnetic density decreases, resulting in a decrease in the force and an increase in the slip.

[0024] like Figure 3 As shown, the interior of the turbine 302 is provided with an arc groove, which can effectively improve the air flow in the bracket. Combined with the setting of the impeller 303, it can play the effect of a fan, facilitating the heat in the turbine 302 to be dissipated with the airflow, helping the permanent magnet 306 of the magnet tray 304 to dissipate heat, achieving a cooling effect, and preventing the permanent magnet 306 from being reduced or losing its magnetism due to excessively high operating temperature.

[0025] like Figure 2 As shown, the functions of speed control, steering control, braking control and performance optimization at the connecting shaft 1 (permanent magnetic field force) can be performed, which can improve the transmission effect and efficiency of the magnetic force, thereby achieving better use effect and higher economic benefits.

[0026] like Figure 2 As shown, there is an air gap between the magnetic steel rotor 2 and the conductor rotor 8. This gap is filled with a magnetic field and adopts a non-contact connection, so it has an outstanding energy-saving effect. The energy saving can reach about 25% under heavy load conditions. It has an overload protection function, thereby improving the reliability of the entire system and completely eliminating the damage to the system caused by overload.

[0027] In summary, the torque-limited permanent magnet coupler can effectively improve the air flow in the bracket by setting the speed regulating disc structure 3, and can play the effect of a fan in conjunction with the setting of the impeller 303, so as to facilitate the heat in the turbine 302 to be dissipated with the airflow, and help the permanent magnet 306 of the magnet tray 305 to dissipate heat, thereby achieving a cooling effect, and preventing the permanent magnet 306 from reducing or losing its magnetism due to excessively high operating temperature. At the same time, it effectively reduces the temperature of the turbine 302 and the assembly of the inner sleeve 301, so that the superconducting coil generated in the air gap can be in a superconducting state at all times during operation.

[0028] Furthermore, by providing the steel disk 10 and the conductor rotor 8, a purely mechanical structure is adopted, which will not be affected by electromagnetic interference, and at the same time, the magnetic properties between the magnets can achieve long-term stable operation. At the same time, through the form of non-direct contact between the conductor rotor 8 and the permanent magnet 306, by borrowing the characteristics of non-contact transmission, there is no mechanical friction and wear, which reduces energy loss and maintenance costs, and at the same time realizes efficient energy transmission, improves the transmission efficiency of the system, and makes the coupler as a whole have better torque control performance.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A torque-limiting permanent magnetic coupler, comprising a connecting shaft (1), characterized in that: The left side of the connecting shaft (1) is fixedly connected to a magnetic steel rotor (2), the outer side of the magnetic steel rotor (2) is fixedly connected to a speed regulating disc structure (3), the right side of the connecting shaft (1) is fixedly connected to a controller (4), the right side of the controller (4) is fixedly connected to a rear auxiliary cavity (5), the right side of the rear auxiliary cavity (5) is fixedly connected to a load end (6), and the outer side of the load end (6) is fixedly connected to a locking disc (7); The speed regulating disc structure (3) comprises an assembly inner sleeve (301), the outer side of the magnetic steel rotor (2) is fixedly connected to the assembly inner sleeve (301), the interior of the assembly inner sleeve (301) is movably connected to a turbine (302), the interior of the turbine (302) is fixedly connected to an impeller (303), the interior of the assembly inner sleeve (301) is movably connected to a copper disc (304), the right side of the copper disc (304) is movably connected to a magnet tray (305), and the interior of the magnet tray (305) is provided with a permanent magnet (306).

2. A torque-limited permanent magnetic coupler according to claim 1, characterized in that: The outer side of the connecting shaft (1) is movably connected to a conductor rotor (8), the outer side of the conductor rotor (8) is provided with an air gap retaining block (9), the outer side of the conductor rotor (8) is fixedly connected to a steel disk (10), the outer side of the steel disk (10) is fixedly connected to a copper ring (11), the inner side of the steel disk (10) is fixedly connected to a bearing (12), and the inner side of the bearing (12) is fixedly connected to a motor end (13).

3. A torque-limited permanent magnetic coupler according to claim 1, characterized in that: A magnet hole is provided on the outside of the magnet tray (305), and a permanent magnet (306) is fixedly connected to the magnet hole; an assembly column is fixedly connected to the inside of the assembly inner sleeve (301), and the magnet tray (305) is movably connected to the outside of the assembly column.

4. A torque-limited permanent magnetic coupler according to claim 1, characterized in that: A movable groove is provided on the left side of the assembly inner sleeve (301), and the size of the movable groove is adapted to the size of the turbine (302). The turbine (302) is in the form of a turbine disk with an arc-shaped groove, and 20 impellers (303) are fixedly connected thereto and are equidistantly distributed around the circumference.

5. A torque-limited permanent magnetic coupler according to claim 2, characterized in that: The load end (6) is connected to the connecting shaft (1) via the rear auxiliary cavity (5) and the controller (4), and the outer sides of the load end (6) and the motor end (13) are fixedly connected with a locking disk (7).

6. A torque-limited permanent magnetic coupler according to claim 2, characterized in that: A connection hole is provided on the left side of the steel plate (10), and a bolt is threadedly connected inside the connection hole. Bolts are threadedly connected on both sides of the air gap retaining block (9), and the conductor rotor (8) is connected to the air gap retaining block (9) via the steel plate (10).

7. A torque-limited permanent magnetic coupler according to claim 2, characterized in that: Steel discs (10) are fixedly connected to both sides of the air gap retaining block (9), a magnetic steel rotor (2) is movably connected between the two steel discs (10), and the connecting shaft (1) is connected to the assembly inner sleeve (301) via the magnetic steel rotor (2).

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