Wear-resistant magnetic levitation motor protection bearing

Abstract

The utility model belongs to the technical field of magnetic suspension bearing, disclose a kind of wear-resistant magnetic suspension motor protection bearing, including motor bearing seat, motor bearing seat is equipped with magnetic suspension bearing assembly, magnetic suspension bearing assembly includes angular contact bearing outer ring and angular contact bearing inner ring, several bearing balls are arranged between angular contact bearing outer ring and angular contact bearing inner ring along the axis, the inside of angular contact bearing inner ring is equipped with several grooves, and the groove is ellipsoidal;The length-diameter ratio of the groove is (1.5~1.8):1, and the interval between each groove is 1: (1~1.2) compared with the length of groove short radius;This bearing simple structure, ingenious, can store the metal scrap produced after rotor accidentally falls, reduce the wear and tear of rotor surface to metal scrap.

Description

Technical Field

[0001] This utility model relates to the field of magnetic levitation bearing technology, specifically a wear-resistant protective bearing for magnetic levitation motors. Background Technology

[0002] Falling accidents of magnetic levitation motors occur frequently. Magnetic levitation bearings rely on angular contact ball bearings to protect the magnetic bearings from wear and failure under sudden conditions. Typically, bearing failure manifests as increased raceway clearance between the inner and outer rings. The protective bearings of magnetic levitation motors also suffer from ablation and wear failure on the inner ring surface where the shaft contacts the bearing, leading to wear on both the bearing and the rotor. When the rotor falls unexpectedly, the bearing and rotor are not yet rotating synchronously, and there will be a relative motion process between the inner ring and the rotor. This process involves the rotor rotating and rolling on the inner ring. This process generates heat and produces metal debris under the influence of friction, scratching the contact surface. In more severe cases, it can cause the bearing to seize.

[0003] The patent publication number CN117028420A discloses a high wear-resistant steering kingpin sliding bearing with an elliptical textured surface arranged in a U-shape. The outer ring of the sliding bearing is an outer surface that is interference-fitted with the steering knuckle, and the inner ring of the sliding bearing is an inner surface that is clearance-fitted with the steering kingpin. The inner surface is provided with a number of elliptical recesses arranged in a U-shape, and the elliptical recesses are arranged periodically at a specified interval along the circumference of the sliding bearing. The array of individual elliptical recesses is a U-shape with 1 / 6 of the sliding bearing's spread area as the unit.

[0004] The above technologies still have certain drawbacks. They are suitable for conventional bearings, but because the outer ring of the bearing and the steering knuckle are interference fit, they are not suitable for the structure of magnetic levitation bearings. Furthermore, the elliptical recesses arranged in a U-shape are not very effective at storing metal debris. When the rotor falls accidentally, the relative movement between the rotor and the inner ring will generate a lot of metal debris. The above-mentioned patented technology is insufficient to store the debris, which will scratch the contact surface. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide a wear-resistant protective bearing for a magnetic levitation motor. This bearing can store metal debris generated after the rotor accidentally falls, thereby reducing the wear of the metal debris on the rotor surface.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A wear-resistant magnetic levitation motor protective bearing includes a motor bearing housing, on which a magnetic levitation bearing assembly is fitted. The magnetic levitation bearing assembly includes an outer ring of an angular contact bearing and an inner ring of an angular contact bearing. A plurality of bearing balls are arranged along the axis between the outer ring and the inner ring of the angular contact bearing. A plurality of grooves are formed on the inner side of the inner ring of the angular contact bearing, and the grooves are ellipsoidal. The length-to-diameter ratio of the groove is (1.5 to 1.8):1, and the ratio of the spacing between each groove to the length of the short radius of the groove is 1:(1 to 1.2).

[0007] The following are further optimizations of the above technical solution by this utility model: Several of the grooves are arranged in a straight line along the inner side of the inner ring of the angular contact bearing.

[0008] Further optimization: Several of the grooves are arranged diagonally along the direction of the inner ring of the angular contact bearing.

[0009] Further optimization: The opening of the groove is rhomboid, and the ratio of its long diagonal to its short diagonal is (1.5~1.8):1. The ratio of the interval between two adjacent grooves to the length of the short diagonal of the groove is 1:(1~1.2).

[0010] This utility model adopts the above-mentioned technical solution, which is ingenious in conception and reasonable in structure. The designed groove can be ellipsoidal or rhomboid, which can store the metal debris generated by rotor friction after the rotor falls off, thereby reducing the wear between the rotor and the inner ring of the bearing. Moreover, the designed groove can increase the surface area of ​​the inner ring of the bearing, reduce the contact area with the rotor, improve the cooling effect of the rotor, and facilitate use.

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the overall structure of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the magnetic levitation bearing assembly according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the inner side structure of the inner ring of the angular contact bearing according to an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0013] In the diagram: 1. Motor bearing housing; 2. Outer ring of angular contact bearing; 3. Bearing balls; 4. Inner ring of angular contact bearing; 5. Motor rotor; 6. Groove. Detailed Implementation

[0014] like Figure 1-4 As shown: A wear-resistant magnetic levitation motor protective bearing includes a motor bearing housing 1, on which a magnetic levitation bearing assembly is fitted. The magnetic levitation bearing assembly includes an outer ring 2 of an angular contact bearing and an inner ring 4 of an angular contact bearing. A plurality of bearing balls 3 are arranged along the axis between the outer ring 2 of the angular contact bearing and the inner ring 4 of the angular contact bearing. A plurality of grooves 6 are formed on the inner side of the inner ring 4 of the angular contact bearing. The grooves 6 are ellipsoidal. The length-to-diameter ratio of the groove 6 is (1.5~1.8):1, and the ratio of the spacing between each groove 6 to the length of the short radius of the groove 6 is 1:(1~1.2).

[0015] With this design, when the magnetic levitation motor falls, the motor rotor 5 will fall and contact the inner side of the angular contact bearing inner ring 4. Under the action of friction, the motor rotor 5 and the angular contact bearing inner ring 4 will move relative to each other, generating metal debris. This metal debris will scratch the inner side of the angular contact bearing inner ring 4 and cause surface wear of the motor rotor 5. The groove 6 can store the metal debris generated by the impact between the motor rotor 5 and the angular contact bearing inner ring 4, reducing the contact area between the metal debris and the motor rotor 5. In addition, during normal operation, when air flows over the surface of the angular contact bearing inner ring 4, the increased surface area of ​​the groove 6 can reduce the contact area with the motor rotor 5, thereby improving the cooling effect, alleviating the high-temperature corrosion of the motor rotor 5, and facilitating use.

[0016] Several of the grooves 6 are arranged in a straight line along the inner side of the inner ring 4 of the angular contact bearing.

[0017] This design increases the storage capacity of groove 6 for metal scraps, making it more convenient to use.

[0018] Further optimization involves arranging several of the grooves 6 diagonally along the direction of the inner ring 4 of the angular contact bearing.

[0019] This design can further increase the storage capacity of groove 6 for metal scraps.

[0020] Further optimization involves making the opening of the groove 6 rhomboid, with the ratio of its long diagonal to its short diagonal being (1.5~1.8):1.

[0021] The ratio of the interval between two adjacent grooves 6 to the length of the short diagonal of groove 6 is 1:(1~1.2).

[0022] This design allows the diamond-shaped groove 6 to easily store metal scraps, reducing the amount of metal scraps falling out of the groove 6 and making it convenient to use.

[0023] For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. A wear-resistant protective bearing for a magnetic levitation motor, characterized in that: The motor bearing housing (1) is fitted with a magnetic levitation bearing assembly. The magnetic levitation bearing assembly includes an outer ring (2) of an angular contact bearing and an inner ring (4) of an angular contact bearing. A number of bearing balls (3) are arranged along the axis between the outer ring (2) of the angular contact bearing and the inner ring (4) of the angular contact bearing. A number of grooves (6) are opened on the inner side of the inner ring (4) of the angular contact bearing. The grooves (6) are ellipsoidal. The length-to-diameter ratio of the groove (6) is (1.5~1.8):1, and the ratio of the distance between two adjacent grooves (6) to the length of the short radius of the groove (6) is 1:(1~1.2).

2. The wear-resistant protective bearing for a magnetic levitation motor according to claim 1, characterized in that: Several grooves (6) are arranged in a straight line along the inner side of the inner ring (4) of the angular contact bearing.

3. The wear-resistant protective bearing for a magnetic levitation motor according to claim 1, characterized in that: Several of the grooves (6) are arranged obliquely along the direction of the inner ring (4) of the angular contact bearing.

4. The wear-resistant protective bearing for a magnetic levitation motor according to claim 1, characterized in that: The opening of the groove (6) is rhomboid, and the ratio of its long diagonal to its short diagonal is (1.5~1.8):

1. The ratio of the interval between two adjacent grooves (6) to the length of the short diagonal of the groove (6) is 1:(1~1.2).

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