Permanent magnet coupling drive device

Abstract

This invention discloses a permanent magnet coupling transmission device, which includes an outer rotor body and an inner rotor body. The outer rotor body has a cylindrical structure with a rotor cavity formed inside. The inner rotor body is located in the rotor cavity and includes a first permanent magnet disk, a second permanent magnet disk, and at least one permanent magnet unit located between the first and second permanent magnet disks. At least one slide rail is formed on the first permanent magnet and / or the second permanent magnet disk. The permanent magnet unit includes a telescopic member and a permanent magnet assembly connected to the telescopic end of the telescopic member. Under the action of the telescopic member, the permanent magnet assembly can move along the slide rail, thereby changing the air gap between the permanent magnet in the permanent magnet assembly and the outer rotor body. The magnetic field formed between the inner rotor body and the outer rotor body in this application is an almost complete spatial closed magnetic field, which maximizes the formation of a high-density coupled magnetic field in a limited space, greatly increases the magnetic energy density of the coupled magnetic field, and increases the power transmission capability.

Description

Technical Field

[0001] This invention belongs to the technical field of load speed regulation equipment, specifically, it relates to a permanent magnet coupling transmission device. Background Technology

[0002] A magnetic coupler, also known as a magnetic coupling or permanent magnet drive, mainly consists of three parts: a copper rotor, a permanent magnet rotor, and a controller. Generally, the copper rotor is connected to the motor shaft, and the permanent magnet rotor is connected to the shaft of the driven machine. There is an air gap (called an air gap) between the copper rotor and the permanent magnet rotor, without a mechanical connection for transmitting torque. This creates a soft (magnetic) connection between the motor and the driven machine, and the torque and speed of the driven machine shaft are varied by adjusting the air gap. Due to different air gap adjustment methods, permanent magnet eddy current drives are classified into different types, including standard, delayed, torque-limiting, and speed-regulating types.

[0003] In practical engineering design and application, in order to ensure that the fan or pump system meets the output requirements when the load is at its maximum, it is usually necessary to equip the fan or pump system according to the maximum output capacity of the system. However, in actual practice, in most cases, the system does not need to be used at full load. Continuous control of flow and / or pressure can be achieved by adjusting the air gap, replacing the valves that control flow and / or pressure in the original system. With the output speed of the power unit (prime mover) remaining unchanged, the torque, speed, and power of the operating equipment and devices can be adjusted to meet the requirements of different operating conditions, reducing energy demand and thus saving energy significantly.

[0004] When performing permanent magnet speed regulation, an adjustment mechanism is usually added to the extrusion of the permanent magnet coupler to change the effective coupling part between the permanent magnet rotor and the conductor rotor. This changes the torque transmitted between them, enabling repeatable, adjustable, and controllable output torque and speed, thus achieving the purpose of speed regulation and energy saving.

[0005] Existing permanent magnet speed regulation generally falls into two categories: one is a disc structure, where magnets are mounted on a disc, forming a coupled magnetic field in a localized, face-to-face space; the other is a cylindrical structure, where magnets are mounted on a cylinder, forming a coupled magnetic field in a localized, cylindrical space. The magnetic fields of these two adjustment structures are not closed, the magnetic energy density of the coupled magnetic field is relatively low, and the power transmission capability needs to be improved. Summary of the Invention

[0006] The purpose of this invention is to provide a permanent magnet coupling transmission device to solve the problems existing in the prior art, such as the spatial coupling magnetic field being mostly an open structure, the magnetic energy density being relatively low, and the power transmission capability needing to be improved.

[0007] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0008] In one aspect, the present invention provides a permanent magnet coupling transmission device, comprising:

[0009] The outer rotor body is a cylindrical structure, and a rotor cavity is formed inside it;

[0010] An inner rotor body is located in the inner cavity of the rotor and includes a first permanent magnet disk, a second permanent magnet disk, and at least one permanent magnet unit located between the first permanent magnet disk and the second permanent magnet disk. At least one slide is formed on the first permanent magnet and / or the second permanent magnet disk. The permanent magnet unit includes a telescopic member and a permanent magnet assembly connected to the telescopic end of the telescopic member. Under the action of the telescopic member, the permanent magnet assembly can move along the slide.

[0011] The outer rotor is externally connected to a first drive shaft, and the inner rotor is externally connected to a second drive shaft.

[0012] In some embodiments of this application, the outer rotor body includes a first conductor disk, a second conductor disk, and a conductor cylinder located between the first conductor disk and the second conductor disk.

[0013] In some embodiments of this application, the length direction of the slide is along the radial direction of the first permanent disk and / or the second permanent disk.

[0014] In some embodiments of this application, a plurality of first slides are formed on the first permanent disk along the circumferential direction, and a plurality of second slides are formed on the second permanent disk along the circumferential direction, with the plurality of first slides and the plurality of second slides corresponding one-to-one.

[0015] In some embodiments of this application, the number of permanent magnet units is the same as the number of the first slide rail or the second slide rail, and the fixed end of the telescopic member is disposed on the second flange along the circumferential direction, the second flange being used to connect the second drive shaft.

[0016] In some embodiments of this application, the permanent magnet assembly includes a magnet frame connected to the telescopic end of the telescopic member and a permanent magnet located within the magnet frame.

[0017] In some embodiments of this application, the magnet frame is triangular in shape, comprising a first magnet frame, a second magnet frame, and a third magnet frame. The first magnet frame is located within the first slide rail, the second magnet frame is located within the second slide rail, and the third magnet frame is located between the first permanent magnet disk and the second permanent magnet disk. Under the action of the telescopic member, the first magnet frame and the second magnet frame slide along the first slide rail and the second slide rail, respectively.

[0018] In some embodiments of this application, the telescopic component is a hydraulic cylinder, and the telescopic ends of the plurality of hydraulic cylinders are respectively connected to the plurality of third magnet frames one by one.

[0019] In some embodiments of this application, the outer rotor body is connected to a first flange, and the first rotor shaft is connected to the first rotor body through the first flange.

[0020] In some embodiments of this application, the first conductor disk and the second conductor disk have connecting through holes formed at their centers, and the first flange is connected to the outside of the first conductor disk.

[0021] Both the first permanent disk and the second permanent disk are circular disk structures with a connecting through hole formed in their center. The second flange is fixed to the inside of the first permanent disk and extends outward through the connecting through hole on the second permanent disk and the second conductor disk.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are:

[0023] The permanent magnet coupling transmission device involved in this application has an outer rotor body forming a rotor cavity, and an inner rotor body located in the closed rotor cavity. Slides are formed on the first and second permanent magnet disks in the inner rotor body. Under the action of the telescopic member, the permanent magnet assembly moves along the radial direction of the first and second permanent magnet disks, thereby changing the air gap between the permanent magnet in the permanent magnet assembly and the outer rotor body. The magnetic field formed between the inner rotor body and the outer rotor body in the technical solution of this application is an almost complete spatial closed magnetic field, which maximizes the formation of a high-density coupling magnetic field in a limited space, greatly increases the magnetic energy density of the coupling magnetic field, and increases the power transmission capability.

[0024] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the permanent magnet coupling transmission device proposed in this invention;

[0027] Figure 2 This is a schematic diagram of the outer rotor body and inner rotor body structure of one embodiment of the present invention;

[0028] Figure 3This is the front view of the permanent magnet coupling transmission device proposed in the invention;

[0029] Figure 4 yes Figure 3 AA section view;

[0030] Figure 5 This is the front view of the outer rotor of the permanent magnet coupling transmission device proposed in the invention;

[0031] Figure 6 yes Figure 5 BB section view;

[0032] Figure 7 This is a front view of the inner rotor of the permanent magnet coupling transmission device proposed in the invention.

[0033] Figure 8 yes Figure 7 CC section view;

[0034] Figure 9 This is a schematic diagram of the exploded structure of the inner rotor body;

[0035] Figure 10 This is a schematic diagram of a permanent magnet component structure according to an embodiment of the invention.

[0036] In the picture,

[0037] 100. Outer rotor body; 110. First flange; 120. First conductor disk; 130. Second conductor disk; 140. Conductor cylinder; 150. Rotor inner cavity;

[0038] 200. Inner rotor body; 210. Second flange;

[0039] 220. Telescopic component; 221. Hydraulic cylinder; 222. Hydraulic control assembly;

[0040] 230. First permanent disk; 231. First slide rail;

[0041] 240. Permanent magnet unit; 241. Third magnet frame; 242. First magnet frame; 243. Second magnet frame; 244. Permanent magnet;

[0042] 250. Second permanent disk; 251. Second slide rail. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0049] Example 1

[0050] like Figure 1-4As shown, the present invention proposes a permanent magnet coupling transmission device, which includes an outer rotor body 100 and an inner rotor body 200. The outer rotor body 100 has a cylindrical structure and a rotor cavity 150 is formed inside it. The inner rotor body 200 is installed in the rotor cavity 150 formed by the outer rotor body 100. The outer rotor body 100 seals the inner rotor body 200. The outer rotor body 100 is externally connected to a first transmission shaft, and the inner rotor body 200 is externally connected to a second transmission shaft. A gap is formed between the inner rotor body 200 and the outer rotor body 100. The inner rotor body 200 and the outer rotor body 100 can rotate independently.

[0051] The inner rotor body 200 is located in the inner cavity 150 of the rotor, and includes a first permanent magnet disk 230, a second permanent magnet disk 250 and a permanent magnet unit 240 located between the first permanent magnet disk 230 and the second permanent magnet disk 250. The permanent magnet unit 240 is movably connected to the first permanent magnet disk 230 and / or the second permanent magnet disk 250, and a slide is formed on the first permanent magnet 240 and / or the second permanent magnet disk 250.

[0052] The permanent magnet unit 240 includes a telescopic member 220 and a permanent magnet assembly connected to the telescopic end of the telescopic member 220. The permanent magnet assembly is connected to the slide rail. The telescopic member 220 drives the permanent magnet assembly to move along the length of the slide rail. During the movement, the air gap between the permanent magnet assembly and the outer rotor body 100 changes, thereby changing the power transmission between the outer rotor body 100 and the inner rotor body 200, and achieving the purpose of variable speed transmission.

[0053] The outer rotor body 100 is externally connected to the first drive shaft, and the inner rotor body 200 is externally connected to the second drive shaft. The first drive shaft is connected to the motor shaft, and the second drive shaft is connected to the working machine. (The above connection method is only one implementation form and is not limited to connecting the first drive shaft to the motor shaft and the second drive shaft to the working machine. The connection relationship can be adjusted according to the actual structural needs.) When the air gap between the inner rotor body 200 and the outer rotor body 100 changes, the shaft torque and speed of the working machine can be adjusted accordingly while the motor output power remains unchanged.

[0054] The specific structure of the outer rotor body 100 will be described in detail below:

[0055] like Figure 5 , Figure 6 As shown, the outer rotor body 100 includes a first conductor disk 120, a second conductor disk 130, and a conductor cylinder 140 located between the first conductor disk 120 and the second conductor disk 130. The first conductor disk 120, the second conductor disk 130, and the conductor cylinder 140 form a relatively sealed rotor cavity 150. The materials of the first conductor disk 120 and the second conductor disk 130 can be armature winding disks. The armature winding is differentially coupled to the inner rotor body 200.

[0056] An induced current is generated in the armature winding, and the reverse magnetic field generated by the induced current achieves magnetic coupling torque transmission with the permanent magnet magnetic field of the inner rotor body 200; the materials of the first conductor disk 120 and the second conductor disk 130 can also be made of metal conductors, which are differentially coupled with the inner rotor body 200, and induced eddy currents are generated in the metal conductors. The reverse magnetic field generated by the induced eddy currents achieves magnetic coupling torque transmission with the permanent magnet magnetic field of the inner rotor body 200.

[0057] To facilitate adjustment of the air gap between the inner rotor body 200 and the outer rotor body 100, the length direction of the slide is along the radial direction of the first permanent magnet disk 230 and / or the second permanent magnet disk 250. The telescopic member 220 drives the permanent magnet assembly to move along the radial direction of the first permanent magnet disk 230 and / or the second permanent magnet disk 250, so that the air gap between the permanent magnet assembly and the entire outer rotor body 100 changes accordingly, which facilitates qualitative control according to actual transmission requirements.

[0058] The specific structure of the permanent magnet unit 240 is described in detail below:

[0059] The permanent magnet assembly includes a magnet frame connected to the telescopic end of the telescopic member 220 and a permanent magnet 244 located within the magnet frame. The magnet frame is connected to a slide rail located on the first permanent magnet disk 230 and / or the second permanent magnet disk 250. The permanent magnet 244 is connected within the magnet frame. As the telescopic member 220 extends and retracts, the magnet frame slides along the slide rail, and the permanent magnet located within the magnet frame moves accordingly, changing the position of the permanent magnet within the outer rotor body 100, thereby changing the magnetic coupling torque between the outer rotor body 100 and the inner rotor body 200.

[0060] Example 2

[0061] The difference between this embodiment and Embodiment 1 is that, as Figure 7-9 As shown, in order to achieve structural balance and improve the speed transmission effect, multiple slides are provided along the circumferential direction on both the first permanent disk 230 and the second permanent disk 250. The multiple slides provided on the first permanent disk 230 are defined as the first slide 231, and the second permanent disk 250 has a second slide 251.

[0062] Preferably, the number of the first slide rail 231 and the second slide rail 251 are in one-to-one correspondence, and the number of permanent magnet units 240 is the same as the number of the first slide rail 231 or the second slide rail 251. The permanent magnet components of each permanent magnet unit 240 are respectively connected to one of the first slide rail 231 and the second slide rail 251 on both sides. The fixed end of the telescopic member 220 is arranged on the second flange 210 along the circumferential direction. The second flange 210 is used to connect the second drive shaft.

[0063] like Figure 10As shown, with multiple slides provided on both the first permanent disk 230 and the second permanent disk 250, the magnet frame is designed in a triangular shape. The magnet frame specifically includes a first magnet frame 242, a second magnet frame 243, and a third magnet frame 241. The first magnet frame 242 is located in the first slide 231, the second magnet frame 243 is located in the second slide 251, and the third magnet frame 241 is located between the first permanent disk 230 and the second permanent disk 250. Under the action of the telescopic member 220, the first magnet frame 242 and the second magnet frame 243 slide along the first slide 231 and the second slide 251, respectively.

[0064] Example 3

[0065] The difference between this embodiment and embodiment 2 is that, furthermore, the first slide rail 231 or the second slide rail 251 is evenly distributed on the first permanent magnet disk 230 and the second permanent magnet disk 250. The uniform circumferential distribution can make the magnetic field distribution uniform. In addition, the telescopic member 220 is preferably a hydraulic cylinder 221. Each hydraulic cylinder 221 and the hydraulic control group 222 that controls the action of the hydraulic cylinder 221 are fixedly connected to the second flange 210. The telescopic ends of the multiple hydraulic cylinders 221 are respectively connected to the multiple third magnet frames 241 one by one.

[0066] Example 4

[0067] To facilitate the connection between the outer rotor body 100 and the inner rotor body 200, a connection through hole is opened in the center of the first conductor disk 120 and the second conductor disk 130 of the outer rotor body 100, and the first flange 110 is connected to the outside of the first conductor disk 120 by fasteners such as bolts.

[0068] The first permanent disk 230 and the second permanent disk 250 can be designed in various shapes, such as squares or polygons. Preferably, the first permanent disk 230 and the second permanent disk 250 are designed as disk structures, with a connecting through hole formed in the center.

[0069] The second flange 210 is fixed inside the first permanent magnet disk 230 and extends outward through the connection through holes on the second permanent magnet disk 250 and the second conductor disk 130. The first flange 110 and the second flange 210 extend in opposite directions, which facilitates connection with the motor and the working machine respectively located on both sides.

[0070] Specific work process:

[0071] The first drive shaft connected to the motor shaft rotates with the rotation of the motor shaft, thereby driving the outer rotor body 100 connected to the first drive shaft to rotate relative to the inner rotor body 200. Since the inner rotor body 200 and the outer rotor body 100 form a non-contact coupling, the cutting of magnetic lines of force is achieved while the outer rotor body 100 rotates relative to the inner rotor body 200.

[0072] When it is necessary to adjust the working torque and speed of the working machine, the hydraulic cylinder 221 is activated, so that the extension end of the hydraulic cylinder 221 drives the permanent magnet assembly to move up and down along the first slide rail 231 and the second slide rail 251, thereby changing the air gap between the permanent magnet assembly and the outer rotor body 100.

[0073] The size of the air gap or the coupling area between the outer rotor body 100 and the permanent magnet assembly determines the size of the electromagnetic torque that can be transmitted between them. Under the condition that the rotational speed of the outer rotor body 100 remains constant and other conditions are the same, the larger the air gap or the smaller the air gap coupling area, the smaller the transmitted electromagnetic torque, and the smaller the air gap or the larger the air gap coupling area, the larger the transmitted electromagnetic torque.

[0074] In other words, adjusting the air gap spacing or the air gap coupling area can achieve the purpose of adjusting the transmission electromagnetic torque, thereby achieving the purpose of adjusting the load speed. Moreover, regardless of whether the rotor disc is the driving disc or the driven disc, they can all perform magnetic coupling electromagnetic torque transmission or drive.

[0075] Using the permanent magnet coupling transmission device involved in this application, since the outer rotor body 100 forms a closed cavity, the magnetic field formed between it and the inner rotor body 200 is an almost complete spatial closed magnetic field. It can maximize the formation of a high-density coupling magnetic field in a limited space, greatly increasing the magnetic energy density of the coupling magnetic field and increasing the power transmission capability.

[0076] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A permanent magnet coupling transmission device, characterized in that, include: The outer rotor body is a cylindrical structure, and a rotor cavity is formed inside it; An inner rotor body is located in the inner cavity of the rotor and includes a first permanent magnet disk, a second permanent magnet disk, and at least one permanent magnet unit located between the first permanent magnet disk and the second permanent magnet disk. At least one slide is formed on the first permanent magnet disk and / or the second permanent magnet disk. The permanent magnet unit includes a telescopic member and a permanent magnet assembly connected to the telescopic end of the telescopic member. Under the action of the telescopic member, the permanent magnet assembly can move along the slide. The outer rotor is externally connected to a first drive shaft, and the inner rotor is externally connected to a second drive shaft. The first permanent disk has multiple first slides formed along the circumferential direction, and the second permanent disk has multiple second slides formed along the circumferential direction, with the multiple first slides and multiple second slides corresponding one-to-one; The permanent magnet assembly includes a magnet frame connected to the telescopic end of the telescopic member and a permanent magnet located within the magnet frame. The magnet frame is triangular in shape and includes a first magnet frame, a second magnet frame, and a third magnet frame. The first magnet frame is located in the first slide rail, the second magnet frame is located in the second slide rail, and the third magnet frame is located between the first permanent magnet disk and the second permanent magnet disk. Under the action of the telescopic member, the first magnet frame and the second magnet frame slide along the first slide rail and the second slide rail, respectively.

2. The permanent magnet coupling transmission device according to claim 1, characterized in that, The outer rotor body includes a first conductor disk, a second conductor disk, and a conductor cylinder located between the first conductor disk and the second conductor disk.

3. The permanent magnet coupling transmission device according to claim 2, characterized in that, The length direction of the slide is along the radial direction of the first permanent disk and / or the second permanent disk.

4. The permanent magnet coupling transmission device according to claim 3, characterized in that, The number of permanent magnet units is the same as the number of the first slide rail or the second slide rail. The fixed end of the telescopic member is arranged on the second flange along the circumferential direction. The second flange is used to connect the second drive shaft.

5. The permanent magnet coupling transmission device according to claim 4, characterized in that, The telescopic component is a hydraulic cylinder, and the telescopic ends of the plurality of hydraulic cylinders are respectively connected to the plurality of third magnet frames one by one.

6. The permanent magnet coupling transmission device according to claim 4, characterized in that, The outer rotor is externally connected to a first flange, which is then connected to the first drive shaft.

7. The permanent magnet coupling transmission device according to claim 6, characterized in that, The first conductor disk and the second conductor disk have connecting through holes formed in their centers, and the first flange is connected to the outside of the first conductor disk; Both the first permanent disk and the second permanent disk are circular disk structures with a connecting through hole formed in their center. The second flange is fixed to the inside of the first permanent disk and extends outward through the connecting through hole on the second permanent disk and the second conductor disk.

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