High-temperature-resistant permanent magnet coupler

Abstract

The invention discloses a high-temperature-resistant permanent magnet coupler. The high-temperature-resistant permanent magnet coupler comprises a first hub, wherein a step part is arranged at one end of the first hub; the end cover is arranged at the other end of the first hub, an annular containing groove is formed between the end cover and the step part, the conductor disc is arranged on the annular containing groove in a sleeving mode, and torque can be transmitted between the conductor disc and the first hub; the memory spring assembly is arranged in the annular containing groove, one end of the memory spring assembly is connected with the conductor disc, and the other end of the memory spring assembly is connected with the end cover. According to the high-temperature-resistant permanent magnet coupler, when the temperature of the memory spring assembly rises (namely, the temperature near the conductor disc rises), the memory spring assembly deforms and can drive the conductor disc to move, so that the conductor rotor is far away from the magnet disc, an air gap between the conductor rotor and the magnet rotor is enlarged, magnetic induction lines are not cut any more, and the high-temperature-resistant performance of the coupler is improved. And the conductor disc does not heat any more.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnetic couplers, and in particular to a high temperature resistant permanent magnetic coupler. Background Art

[0002] The permanent magnet coupler is a non-contact coupling, which includes a conductor rotor and a magnet rotor. The conductor rotor and the magnet rotor move relative to each other. The conductor disk on the conductor rotor cuts the magnetic induction line on the magnet rotor to generate an induced current. The induced current generates an electromagnetic field, which couples with the physical magnetic field on the magnet rotor to achieve non-contact transmission. This product has the advantages of non-contact, maintenance-free, low installation and alignment requirements, and long life, so it is widely promoted. The working principle of this product determines that a certain amount of heat will inevitably be generated during the working process (eddy current heating generated by the conductor cutting the magnetic induction line). As the slip between the conductor rotor and the magnet rotor increases, the heat generated when the equipment is working will also increase. Therefore, the factory design of normal equipment is generally controlled within 4% slip. However, when the equipment is working under normal conditions and overload occurs, the slip between the conductor rotor and the permanent magnet rotor will exceed 4%. At this time, the heat generated cannot be dissipated in time, which will cause the demagnetization of the permanent magnet and then cause the failure of the product.

[0003] Therefore, those skilled in the art provide a high temperature resistant permanent magnet coupler to solve the problems raised in the above background technology. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a high temperature resistant permanent magnetic coupler.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high temperature resistant permanent magnetic coupler, comprising:

[0007] Conductor disc;

[0008] A magnetic disk, one surface of which is opposite to the conductor disk, and a heat-insulating and flame-retardant layer is provided on the surface of the magnetic disk opposite to the conductor disk;

[0009] a first hub, wherein a step portion is provided on one end of the first hub;

[0010] An end cover, wherein the end cover is arranged on the other end of the first hub, an annular receiving groove is formed between the end cover and the step portion, the conductor disc is sleeved in the annular receiving groove, and torque can be transmitted between the conductor disc and the first hub;

[0011] A memory spring assembly, wherein the memory spring assembly is disposed in the annular receiving groove, one end of the memory spring assembly is connected to the conductor disk, and the other end is connected to the end cover; wherein before the temperature around the memory spring assembly is lower than the deformation temperature of the memory spring assembly, the memory spring assembly presses the conductor disk against the first position;

[0012] When the temperature around the memory spring assembly is greater than or equal to the deformation temperature of the memory spring assembly, the memory spring assembly deforms and shortens, thereby pulling the conductor disk away from the magnet disk.

[0013] Optionally, the conductor disc comprises a conductor disc body and a conductor disc bending portion, and one side of the conductor disc bending portion is connected to the memory spring assembly.

[0014] Optionally, the mating surface between the conductor disc and the first hub is a polygon;

[0015] The memory spring assembly includes a plurality of memory spring groups, and one memory spring group is connected to one edge.

[0016] Optionally, a memory spring set includes at least one memory spring.

[0017] Optionally, the polygon is a quadrilateral;

[0018] The number of the memory spring groups is four, one memory spring group corresponds to one side, and each memory spring group is provided with two memory springs.

[0019] Optionally, the polygon is a hexagon;

[0020] The number of the memory spring groups is six, one memory spring group corresponds to one side, and each memory spring group is provided with one memory spring.

[0021] Optionally, the high temperature resistant permanent magnetic coupler further comprises a guide column;

[0022] A guide post is used in conjunction with a memory spring, a guide post is disposed in a memory spring and connected to the conductor rotor;

[0023] The end cover is provided with a guide post through hole, one guide post through hole is used in conjunction with a guide post, and the guide post through hole is used to enable the guide post to pass through the guide post through hole when the guide post moves away from the magnet disk to leave the annular accommodating groove; wherein, when the conductor rotor is pulled by the memory spring, the guide post moves with the conductor rotor.

[0024] The present invention has the following beneficial effects:

[0025] 1. The high temperature resistant permanent magnet coupler of the present invention is provided with a heat insulating and flame retardant layer on the magnet disk. In this way, when the magnet disk and the conductor disk rotate relative to each other, the heat on the conductor disk can be prevented from being radiated to the magnet disk, thereby solving the problem of demagnetization of the permanent magnet due to excessive heat in the prior art.

[0026] 2. When the temperature of the memory spring assembly rises (that is, the temperature near the conductor disk rises), the deformation of the memory spring assembly can drive the conductor disk to move, so that the conductor rotor moves away from the magnet disk, thereby increasing the air gap between the conductor rotor and the magnet rotor, no longer cutting the magnetic flux lines, and causing the conductor disk to no longer heat up. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the high temperature resistant permanent magnetic coupler in the first embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of a radial cross-section of the bent portion of the conductor disk in the first embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of a radial cross-section of a bent portion of a conductor disk in the second embodiment of the present application.

[0030] Legend:

[0031] 1. Conductor disk; 2. Magnetic disk; 3. Heat-insulating and flame-retardant layer; 4. First wheel hub; 41. Step portion; 5. End cover; 6. Annular receiving groove; 11. Conductor disk body; 12. Conductor disk bending portion; 7. Memory spring; 8. Guide column; 51. Guide column through hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the description of this application, it should be noted that the terms used here are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] like Figure 1 The high temperature resistant permanent magnetic coupler shown comprises a conductor disk 1 and a magnet disk 2 , wherein one surface of the magnet disk 2 is opposite to the conductor disk 1 , and a heat insulating and flame retardant layer 3 is provided on the surface of the magnet disk 2 opposite to the conductor disk 1 .

[0034] The high temperature resistant permanent magnet coupler of the present invention is provided with a heat insulating and flame retardant layer on the magnet disk. In this way, when the magnet disk and the conductor disk rotate relative to each other, the heat on the conductor disk can be prevented from being radiated to the magnet disk, thereby solving the problem of demagnetization of the permanent magnet due to excessive heat in the prior art.

[0035] In this embodiment, the heat-insulating and flame-retardant layer includes a heat-insulating layer and a flame-retardant layer, wherein the heat-insulating layer is located between the flame-retardant layer and the permanent magnet.

[0036] See also Figure 1 In this embodiment, the high temperature resistant permanent magnetic coupler further includes a first hub 4, an end cover 5 and a memory spring assembly, and a step portion 41 is provided on one end of the first hub 4;

[0037] The end cover 5 is arranged on the other end of the first hub 4, an annular receiving groove 6 is formed between the end cover 5 and the step portion 41, the conductor disc 1 is sleeved on the annular receiving groove 6, and torque can be transmitted between the conductor disc 1 and the first hub (4);

[0038] The memory spring assembly is arranged in the annular receiving groove 6, one end of the memory spring assembly is connected to the conductor disc 1, and the other end is connected to the end cover 5; wherein, when the temperature around the memory spring assembly is lower than the deformation temperature of the memory spring assembly, the memory spring assembly presses the conductor disc to the first position;

[0039] When the temperature around the memory spring assembly is greater than or equal to the deformation temperature of the memory spring assembly, the memory spring assembly deforms and shortens, thereby pulling the conductor disk away from the magnet disk.

[0040] In this way, when the temperature of the memory spring assembly rises (that is, the temperature near the conductor disk rises), the deformation of the memory spring assembly can drive the conductor disk to move, thereby making the conductor rotor move away from the magnet disk, thereby increasing the air gap between the conductor disk and the magnet disk, no longer cutting the magnetic flux lines, and causing the conductor disk to no longer heat up.

[0041] See also Figure 1 In this embodiment, the conductor disk includes a conductor disk body 11 and a conductor disk bending portion 12. The conductor disk bending portion 12 is formed by extending from one end of the conductor disk body 11 close to the first hub 4 in a direction away from the magnetic disk and then bending and extending in the direction of the first hub. One side of the conductor disk bending portion 12 is connected to the memory spring assembly.

[0042] In this embodiment, the mating surface between the conductor disk and the first hub is a polygon;

[0043] The memory spring assembly includes a plurality of memory spring groups, and one memory spring group is connected to one edge.

[0044] In this embodiment, a memory spring group includes at least one memory spring 7 .

[0045] It is understood that the shape of the polygon can be set as required, for example, see Figure 2 as well as Figure 3 ,exist Figure 2 In the illustrated embodiment, the polygon is a quadrilateral;

[0046] There are four memory spring groups, one memory spring group corresponds to one side, and each memory spring group is provided with two memory springs 7 .

[0047] exist Figure 3 In the illustrated embodiment, the polygon is a hexagon;

[0048] There are six memory spring groups, one memory spring group corresponds to one edge, and each memory spring group is provided with one memory spring.

[0049] In this embodiment, the memory spring and the conductor disk and / or the end cover 5 can be connected by bonding, welding or the like.

[0050] In this embodiment, the high temperature resistant permanent magnetic coupler further comprises a guide column 8;

[0051] A guide post 8 is used in conjunction with a memory spring 7, and a guide post 8 is arranged in a memory spring 7 and connected to the conductor disc 1;

[0052] A guide post through hole 51 is provided on the end cover 5, and one guide post through hole 51 is used in conjunction with a guide post 8. The guide post through hole 51 is used to allow the guide post 8 to pass through the guide post through hole 51 when the guide post 8 moves away from the magnetic disk and leaves the annular receiving groove; wherein, when the conductor disk 1 is pulled by the memory spring 7, the guide post 8 moves with the conductor disk 1.

[0053] By providing the guide column, the conductor disk can be guided when being pulled by the memory spring, thereby preventing the conductor disk or the memory spring from being deformed or misplaced during the movement.

[0054] By providing the guide post through hole, the guide post can be given movement space.

[0055] In an alternative embodiment, the high temperature resistant permanent magnetic coupler further comprises a first hub, an end cover, an electric telescopic rod, a temperature sensor and a controller, wherein a step portion is provided on one end of the first hub;

[0056] The end cover is arranged on the other end of the first hub, an annular receiving groove is formed between the end cover and the step portion, and the conductor disc is sleeved in the annular receiving groove;

[0057] The fixed end of the electric telescopic rod is connected to the end cover, and the telescopic end of the electric telescopic rod is connected to the conductor disk;

[0058] The temperature sensor is mounted on the first hub or the conductor disc to obtain ambient temperature information;

[0059] The controller is connected to the temperature sensor and the electric telescopic rod respectively, and the controller is used to obtain the temperature transmitted by the temperature sensor and send a working command to the electric telescopic rod when the temperature exceeds a preset threshold;

[0060] The electric telescopic rod is used to drive the conductor disk away from the magnet disk after receiving the working command.

[0061] In this way, the conductor disk can be automatically controlled to cut the magnetic induction line or stay away from the magnet disk when the temperature is high according to the temperature.

[0062] In this embodiment, the present application further includes a second hub connected to the magnet disk.

[0063] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant permanent magnetic coupler, characterized in that: The high temperature resistant permanent magnetic coupler comprises: Conductor disc (1); A magnetic disk (2), one surface of the magnetic disk (2) being opposite to the conductor disk (1), and a heat-insulating and flame-retardant layer (3) being provided on the surface of the magnetic disk (2) opposite to the conductor disk (1); A first wheel hub (4), wherein a step portion (41) is provided on one end of the first wheel hub (4); an end cover (5), the end cover (5) being arranged on the other end of the first hub (4), an annular receiving groove (6) being formed between the end cover (5) and the step portion (41), the conductor disc (1) being sleeved on the annular receiving groove (6), and torque can be transmitted between the conductor disc (1) and the first hub (4); A memory spring assembly, wherein the memory spring assembly is arranged in the annular receiving groove (6), one end of the memory spring assembly is connected to the conductor disk (1), and the other end is connected to the end cover (5); wherein: When the temperature around the memory spring assembly is lower than the deformation temperature of the memory spring assembly, the memory spring assembly pushes the conductor disk to a first position; When the temperature around the memory spring assembly is greater than or equal to the deformation temperature of the memory spring assembly, the memory spring assembly deforms and shortens, thereby pulling the conductor disk away from the magnet disk.

2. The high temperature resistant permanent magnetic coupler according to claim 1, characterized in that: The conductor disc comprises a conductor disc body (11) and a conductor disc bent portion (12); one side of the conductor disc bent portion (12) is connected to the memory spring assembly.

3. The high temperature resistant permanent magnetic coupler according to claim 2, characterized in that: The mating surface between the conductor disc and the first hub is a polygon; The memory spring assembly includes a plurality of memory spring groups, and one memory spring group is connected to one edge.

4. The high temperature resistant permanent magnetic coupler according to claim 3, characterized in that: A memory spring group comprises at least one memory spring (7).

5. The high temperature resistant permanent magnetic coupler according to claim 4, characterized in that: The polygon is a quadrilateral; The number of memory spring groups is four, one memory spring group corresponds to one side, and each memory spring group is provided with two memory springs (7).

6. The high temperature resistant permanent magnetic coupler according to claim 4, characterized in that: The polygon is a hexagon; The number of the memory spring groups is six, one memory spring group corresponds to one side, and each memory spring group is provided with one memory spring.

7. The high temperature resistant permanent magnetic coupler according to any one of claims 1 to 4, characterized in that: The high temperature resistant permanent magnetic coupler further comprises a guide column (8); A guide column (8) is used in conjunction with a memory spring (7); the guide column (8) is arranged in the memory spring (7) and connected to the conductor disk (1); The end cover (5) is provided with a guide post through hole (51), one guide post through hole (51) is used in conjunction with a guide post (8), and the guide post through hole (51) is used to allow the guide post (8) to pass through the guide post through hole (51) when the guide post (8) moves away from the magnetic disk to leave the annular receiving groove; wherein: When the conductor disc (1) is pulled by the memory spring (7), the guide column (8) moves with the conductor disc (1).

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