Sealing structure of high-speed magnetic levitation permanent magnet motor

Abstract

The utility model relates to the technical field of sealing structure discloses a sealing structure of high -speed magnetic suspension permanent -magnet motor, including motor casing, seal ring, and motor casing includes end cover, and the end cover includes the first cooperation hole for making motor output shaft to penetrate its own, wherein, the gland is equipped with on the end cover, and the gland is detachably connected with the end cover, and the seal ring is located between the end cover and the gland, and the gland is equipped with the second cooperation hole for with the first cooperation hole intercoordination. Through the above technical scheme, the problem that the sealing ring (carbon ring) is replaced in the prior art and is easy to cause the sealing ring between the motor end cover and the motor casing to fall off is solved.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, and in particular to the sealing structure of a high-speed magnetic levitation permanent magnet motor. Background Technology

[0002] High-speed magnetic levitation permanent magnet motors generally refer to a high-performance motor that combines magnetic levitation technology with permanent magnet motor design. It has advantages such as no mechanical friction, high speed, high efficiency, and low maintenance, and is suitable for high-speed trains, aerospace, precision manufacturing and energy fields.

[0003] Currently, for purposes such as protection, performance maintenance, and safety assurance, high-speed magnetic levitation permanent magnet motors are typically equipped with various sealing structures during use, such as static sealing structures and dynamic sealing structures. Among them, dynamic sealing structures mainly serve to seal the penetration parts of the rotor shaft (motor output shaft). A common dynamic sealing structure is the carbon ring seal, whose core principle is to utilize the tight contact between the carbon ring and the rotating shaft to form a sealing interface.

[0004] However, when the motor starts, there is friction between the motor output shaft and the carbon ring. Over time, this causes the carbon ring to wear, affecting the sealing performance. Therefore, the carbon ring needs to be replaced after the motor has been used for a period of time. However, replacing the carbon ring usually involves disassembling and reassembling the end cover of the motor housing. This means that the maintenance and upkeep of the dynamic sealing structure can also affect the static sealing structure, such as causing the sealing ring between the end cover and the housing to fall off or be damaged. Utility Model Content

[0005] The main purpose of this invention is to provide a sealing structure for a high-speed magnetic levitation permanent magnet motor, which aims to solve the problem in related technologies where the sealing ring between the motor end cover and the motor housing is easily detached when the sealing ring (carbon ring) is replaced.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] The sealing structure of a high-speed magnetic levitation permanent magnet motor includes a motor housing and a sealing ring. The motor housing includes an end cover, which has a first mating hole for the motor output shaft to pass through it. The end cover is provided with a pressure cover, which is detachably connected to the end cover. The sealing ring is located between the end cover and the pressure cover. The pressure cover is provided with a second mating hole for mating with the first mating hole.

[0008] Furthermore, the gland includes a connecting ring and a pressure ring, the connecting ring being threadedly connected to the end cap, and the pressure ring being integrally formed with the connecting ring.

[0009] Furthermore, the end cap is provided with a receiving ring for accommodating the sealing ring, the receiving ring being located between the first mating hole and the second mating hole.

[0010] Furthermore, the projection surface of the pressure ring in the axial direction of the second mating hole is a polygonal structure.

[0011] Furthermore, the diameters of both the first and second mating holes are larger than the inner ring diameter of the sealing ring.

[0012] Furthermore, the end cap is provided with a temporary closing structure for filling the gap between the first mating hole and the motor output shaft.

[0013] Furthermore, the temporary closing structure includes several temporary closing plates, several rotating cams, and several rotating rods. Each rotating cam is fixedly connected to each rotating rod in a one-to-one correspondence, and each rotating cam and each rotating rod is rotatably connected to the end cover. Each temporary closing plate is slidably connected to the end cover and linked with each rotating cam. Several elastic elements are provided between the end cover and the temporary closing plate to ensure that the temporary closing plate is always in contact with the radial surface of the rotating cam.

[0014] Furthermore, each of the temporary closing plates is provided with a fitting strip for cooperating with the motor output shaft.

[0015] Furthermore, each of the temporary closing plates is provided with a clearance groove, and each of the rotating cams is located in the respective clearance groove.

[0016] Furthermore, each of the temporary closing plates is evenly distributed around the first mating hole, and each of the rotating cams is provided with two protrusions, with each rotating cam located between adjacent temporary closing plates.

[0017] The working principle and beneficial effects of this utility model are as follows:

[0018] This utility model's technical solution involves moving the sealing ring to the end of the end cover of a traditional motor housing, away from the motor housing, and providing a pressure cap on the end cover to constrain the sealing ring. Specifically, the sealing ring is located between the end cover and the pressure cap, and the pressure cap is detachably connected to the end cover. Thus, when the sealing ring needs to be replaced, only the pressure cap needs to be removed from the end cover to replace the sealing ring. Since this replacement process does not involve disassembling or assembling the end cover, it fundamentally solves the problem that replacing the sealing ring (carbon ring) can easily lead to the failure of the static sealing structure between the motor end cover and the motor housing.

[0019] Meanwhile, the gland is provided with a second mating hole for mating with the first mating hole, so as to avoid interference between the gland and the output shaft of the motor. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure when the motor is used in this embodiment;

[0022] Figure 2 This is a schematic diagram of the end cap structure in this embodiment;

[0023] Figure 3 for Figure 2 A sectional view;

[0024] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the temporary closure structure inside the end cap in this embodiment.

[0026] Explanation of icon numbers:

[0027] 1. Motor housing; 11. End cover; 111. First mating hole; 112. Receiving ring; 2. Sealing ring; 3. Pressure cap; 31. Second mating hole; 32. Connecting ring; 33. Pressure ring; 4. Temporary closing structure; 41. Temporary closing plate; 411. Clearance groove; 42. Rotary cam; 421. Protrusion; 43. Rotating rod; 44. Elastic element; 45. Adhesive strip.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] like Figures 1-3 As shown, this embodiment proposes a sealing structure for a high-speed magnetic levitation permanent magnet motor, including a motor housing 1 and a sealing ring 2. The motor housing 1 includes an end cover 11, which includes a first mating hole 111 for the motor output shaft to pass through itself, ensuring that the motor output shaft can extend out of the motor housing 1 to connect with and drive an external driven object.

[0031] The end cover 11 is provided with a pressure cover 3, which is detachably connected to the end cover 11. The sealing ring 2 is located between the end cover 11 and the pressure cover 3. That is, the sealing ring 2 is fixed in this embodiment by abutting against the pressure cover 3 and the end cover 11, so that the sealing ring 2 can not only play a dynamic sealing role, but also play a sealing role for the connection gap between the end cover 11 and the pressure cover 3. Moreover, the sealing ring 2 is installed by the mutual cooperation between the pressure cover 3 and the end cover 11. This installation of the sealing ring 2 does not involve the disassembly and assembly of the end cover 11, but only the pressure cover 3 needs to be disassembled and assembled. In this way, the problem of the static sealing structure between the end cover 11 and the motor housing 1 easily failing when the sealing ring 2 is replaced is fundamentally solved.

[0032] Furthermore, the pressure cap 3 is provided with a second mating hole 31 for mating with the first mating hole 111, ensuring that the setting of the pressure cap 3 will not interfere with the output shaft of the motor.

[0033] Meanwhile, the pressure cap 3 includes a connecting ring 32 and a pressure ring 33. The connecting ring 32 is threadedly connected to the end cap 11. That is, in this embodiment, the detachable connection between the pressure cap 3 and the end cap 11 is achieved through a threaded connection, which ensures both the reliability of the connection between the two and the ease of disassembly and assembly of the pressure cap 3. Correspondingly, when the pressure cap 3 (connecting ring 32) rotates at a certain angle, the pressure cap 3 (pressure ring 33) simultaneously abuts against the sealing ring 2 and the end cap 11, ensuring the sealing performance of the sealing ring 2 between the end cap 11 and the pressure cap 3. The pressure ring 33 and the connecting ring 32 are integrally formed, ensuring the overall structural strength of the pressure cap 3.

[0034] The end cap 11 is provided with a receiving ring 112 for accommodating the sealing ring 2. The receiving ring 112 is located between the first mating hole 111 and the second mating hole 31, and between the connecting ring 32 and the sealing ring 2. That is, before the pressure cap 3 is installed on the end cap 11, the presence of the receiving ring 112 can provide positioning for the sealing ring 2, so as to avoid the sealing ring 2 interfering with the normal installation of the pressure cap 3 and affecting the installation efficiency of the pressure cap 3.

[0035] The projection surface of the pressure ring 33 in the axial direction of the second mating hole 31 is a polygonal structure. Compared with the circular structure (ring structure) pressure ring 33, the polygonal structure pressure ring 33 is more convenient for workers to exert force and carry out disassembly and assembly work. External tools such as wrenches can also be used to disassemble and assemble the pressure cover 3, which greatly facilitates the disassembly and assembly work of the pressure cover 3.

[0036] The diameters of both the first mating hole 111 and the second mating hole 31 are larger than the inner ring diameter of the sealing ring 2, which prevents this embodiment from coming into contact with the output shaft of the motor, thereby avoiding wear or damage to the output shaft of the motor during use and effectively improving the service life of this embodiment.

[0037] Correspondingly, the end cover 11 is provided with a temporary closing structure 4 for filling the gap between the first mating hole 111 and the motor output shaft. That is, when the pressure cover 3 needs to be removed to replace the sealing ring 2, the gap between the end cover 11 and the motor output shaft can be filled by activating the temporary closing structure 4, thereby preventing external objects from entering the interior of this embodiment when the sealing ring 2 is replaced, which would affect the normal operation of the motor.

[0038] like Figures 4-5 As shown, the temporary closing structure 4 in this embodiment includes several temporary closing plates 41, several rotating cams 42, and several rotating rods 43. Each rotating cam 42 and each rotating rod 43 are fixedly connected in a one-to-one correspondence, and each rotating cam 42 and each rotating rod 43 are rotatably connected in the end cover 11. At the same time, the surface of the end cover 11 should be provided with control holes for workers to contact the rotating rods 43 so that workers can operate the temporary closing structure 4. The end of the rotating rod 43 away from the rotating cam 42 should have a gap with the surface of the end cover 11, that is, the rotating rod 43 is not directly exposed on the surface of the end cover 11 to avoid interference between the presence of the rotating rod 43 and the rotation movement of the pressure cap 3 (installation of the pressure cap 3). Correspondingly, the rotating rod 43 is provided with a rotating hole for cooperating with external tools such as hexagonal wrenches, so that workers can operate the rotating rod 43 to rotate.

[0039] Each temporary closing plate 41 is slidably connected to the end cover 11 and linked with each rotating cam 42. Several elastic elements 44 are provided between the end cover 11 and the temporary closing plate 41 to keep the temporary closing plate 41 in contact with the radial surface of the rotating cam 42. That is, the rotation of the cam structure determines whether the temporary closing plate 41 is in contact with the output shaft of the motor.

[0040] Preferably, the end cap 11 should be provided with a damping structure that cooperates with the rotating rod 43 to enable the rotating rod 43 to have a self-locking performance. This ensures that the rotating rod 43 and the rotating cam 42 will not reset under the action of the elastic element 44 without human intervention, causing the temporary closing plate 41 to disengage from the designated position, effectively ensuring the operational stability and reliability of this embodiment. The specific construction of the damping structure should be determined according to the type of damping structure selected in actual use in this embodiment, and will not be described in detail in this embodiment.

[0041] Each temporary closing plate 41 is provided with an adhesive strip 45 for cooperating with the motor output shaft. The adhesive strip 45 is fixedly set on the temporary closing plate 41 to prevent the adhesive strip 45 from falling off the temporary closing plate 41 as the temporary closing plate 41 moves. The adhesive strip 45 is preferably made of elastic material such as silicone to ensure the adhesion effect between the adhesive strip 45 and the motor conveying shaft, thereby ensuring the sealing performance between the two.

[0042] Each temporary closing plate 41 is provided with a relief groove 411, and each rotating cam 42 is located in each relief groove 411. The opening of the relief groove 411 can effectively reduce the weight of the temporary closing plate 41 itself and effectively save the space occupied by the temporary closing structure 4 inside the end cover 11, thereby effectively reducing the resistance of the rotating cam 42 when driving the temporary closing plate 41 to move, making it convenient for the staff to operate the temporary closing structure 4.

[0043] Each temporary closing plate 41 is evenly distributed around the first mating hole 111. Each rotating cam 42 is provided with two protrusions 421, and each rotating cam 42 is located between adjacent temporary closing plates 41. That is, each rotating cam 42 can simultaneously control the movement of its adjacent temporary closing plate 41, which effectively improves the operating efficiency of the temporary closing structure 4.

[0044] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0045] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sealing structure for a high-speed magnetic levitation permanent magnet motor, comprising a motor housing (1) and a sealing ring (2), wherein the motor housing (1) includes an end cap (11), the end cap (11) including a first mating hole (111) for the motor output shaft to pass through it, characterized in that, The end cap (11) is provided with a pressure cap (3), the pressure cap (3) is detachably connected to the end cap (11), and the sealing ring (2) is located between the end cap (11) and the pressure cap (3); The pressure cap (3) is provided with a second mating hole (31) for mating with the first mating hole (111).

2. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 1, characterized in that, The pressure cap (3) includes a connecting ring (32) and a pressure ring (33). The connecting ring (32) is threadedly connected to the end cap (11), and the pressure ring (33) and the connecting ring (32) are integrally formed.

3. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 1 or 2, characterized in that, The end cap (11) is provided with a receiving ring (112) for accommodating the sealing ring (2), and the receiving ring (112) is located between the first mating hole (111) and the second mating hole (31).

4. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 2, characterized in that, The projection surface of the pressure ring (33) in the axial direction of the second mating hole (31) is a polygonal structure.

5. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 1, characterized in that, The diameters of the first mating hole (111) and the second mating hole (31) are both larger than the inner ring diameter of the sealing ring (2).

6. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 5, characterized in that, The end cap (11) is provided with a temporary closing structure (4) for filling the gap between the first mating hole (111) and the motor output shaft.

7. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 6, characterized in that, The temporary closing structure (4) includes several temporary closing plates (41), several rotating cams (42), and several rotating rods (43). Each rotating cam (42) is fixedly connected to each rotating rod (43) in a one-to-one correspondence, and each rotating cam (42) and each rotating rod (43) is rotatably connected in the end cover (11). Each temporary closing plate (41) is slidably connected in the end cover (11) and linked with each rotating cam (42). Several elastic elements (44) are provided between the end cover (11) and the temporary closing plate (41) to make the temporary closing plate (41) always fit against the radial surface of the rotating cam (42).

8. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 7, characterized in that, Each of the temporary closing plates (41) is provided with a fitting strip (45) for cooperating with the motor output shaft.

9. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 7, characterized in that, Each of the temporary closing plates (41) is provided with a clearance groove (411), and each of the rotating cams (42) is located in the clearance groove (411).

10. The sealing structure of the high-speed magnetic levitation permanent magnet motor according to claim 7 or 9, characterized in that, Each of the temporary closing plates (41) is evenly distributed around the first mating hole (111), and each of the rotating cams (42) is provided with two protrusions (421), and each rotating cam (42) is located between adjacent temporary closing plates (41).

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