Strong anti-interference magnetic suspension bearing and motor

Abstract

The utility model relates to the technical field of magnetic suspension air compressors, in particular to a magnetic suspension bearing with strong interference resistance and a motor. The bearing comprises a bearing shell, a shielding plate, a sensor and a magnetic suspension bearing body, the bearing shell comprises a ring surface shell and an end surface shell arranged at one end of the ring surface shell, a first through hole is formed in the middle of the end surface shell, and a clamping groove is formed in the side, close to the ring surface shell, of the end surface shell; the shielding plate is arranged at the other end of the annular surface shell, and a second through hole is formed in the middle of the shielding plate; the sensor is arranged in the clamping groove and is fixedly connected to the clamping groove through a screw; and the magnetic suspension bearing body is arranged in the inner diameter of the annular surface shell and is fixedly connected to the end surface shell through a screw. The magnetic suspension bearing and the motor adopting the structure can effectively reduce interference.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic levitation air compressors, in particular to a magnetic levitation bearing and a motor with strong anti-interference ability. Background Technique

[0002] In the magnetic levitation high-speed centrifuge air compressor industry, due to the high rotational speed of the machine and a frequency as high as 700HZ, a high-frequency sine wave is output through high-carrier modulation by an inverter to drive the motor to operate. There are high-order harmonics in the waveform, which are likely to interfere with the normal operation of the magnetic levitation bearing. In the rotor design, the sensor will be placed as far away as possible from the interference source of the motor enameled wire. When the machine is running, the harmonic current of the motor will generate a radiation magnetic field interference to the outside world. These magnetic fields can be transmitted through the air to surrounding equipment or systems, causing displacement signal data drift. The magnetic field inside the motor couples through the magnetic field to transmit interference signals to nearby equipment or systems. When the sensor on the magnetic levitation bearing is interfered, it will affect the judgment of the suspension position of the rotor, resulting in the machine being unable to run smoothly. Content of the Utility Model

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a magnetic levitation bearing and a motor with strong anti-interference ability. The magnetic levitation bearing and the motor adopting this structure can effectively reduce interference.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A magnetic levitation bearing with strong anti-interference ability, the bearing includes:

[0006] A bearing housing, which includes an annular housing and an end face housing provided at one end of the annular housing. A first through hole is provided in the middle of the end face housing, and a clamping groove is provided on the side of the end face housing close to the annular housing;

[0007] A shielding plate, the shielding plate is arranged at the other end of the annular housing, and a second through hole is provided in the middle of the shielding plate;

[0008] A sensor, the sensor is arranged in the clamping groove and is fixedly connected to the clamping groove by screws;

[0009] And a magnetic levitation bearing body, the magnetic levitation bearing body is arranged in the inner diameter of the annular housing and is fixedly connected to the end face housing by screws.

[0010] Preferably, the shielding plate includes a first plate surface and a first convex block located on one side of the first plate surface. The first convex block is arranged around the outer diameter of the first plate surface; the second through hole is located in the middle of the first plate surface.

[0011] Preferably, the two ends of the outer diameter of the magnetic levitation bearing body are respectively abutted against the first convex block and the end face housing.

[0012] Preferably, the material of the shielding plate is No. 45 steel or silicon steel sheet.

[0013] Furthermore, a motor includes a motor barrel, a main shaft, a stator, a magnetic levitation bearing and a bearing seat. The bearing seat is arranged at both ends of the motor barrel. The magnetic levitation bearing is arranged inside the bearing seat. The main shaft is erected and passes through the bearing seat and the magnetic levitation bearing. The stator is arranged in the middle of the main shaft.

[0014] In summary, the advantages of the present utility model are as follows:

[0015] When low-frequency interference or high-frequency interference is generated by the stator of the motor, the shielding effect is achieved by installing a shielding plate on the magnetic levitation bearing, reflecting, absorbing, dispersing and shielding the interference signal, thereby reducing the influence on the magnetic levitation bearing sensor. Through comparative tests, this structure can effectively reduce the interference influence. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the magnetic levitation bearing of the present utility model;

[0017] Figure 2 It is a partial sectional structural diagram of a motor adopting the magnetic levitation bearing of the present utility model;

[0018] Reference numerals: 1, bearing housing; 2, shielding plate; 3, sensor; 4, magnetic levitation bearing body; 5, motor barrel; 6, main shaft; 7, stator; 8, bearing seat; 11, toroidal housing; 12, end face housing; 13, first through hole; 14, card slot; 21, second through hole; 22, first plate surface; 23, first convex block. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0021] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] The following will make a detailed description of the specific implementation manners of the present utility model in conjunction with the accompanying drawings.

[0023] As Figures 1 to 2 shown, a magnetic levitation bearing with strong anti-interference, the bearing includes:

[0024] A bearing housing 1, which includes a toroidal housing 11 and an end face housing 12 provided at one end of the toroidal housing 11. A first through hole 13 is provided in the middle of the end face housing 12, and a clamping groove 14 is provided on the side of the end face housing 12 close to the toroidal housing 11.

[0025] A shielding plate 2, the shielding plate 2 is installed at the other end of the toroidal housing 11, and a second through hole 21 is provided in the middle of the shielding plate 2.

[0026] A sensor 3, the sensor 3 is installed in the clamping groove 14 and is fixedly connected to the clamping groove 14 by screws.

[0027] And a magnetic levitation bearing body 4, the magnetic levitation bearing body 4 is arranged in the inner diameter of the toroidal housing 11 and is fixedly connected to the end face housing 12 by screws. Since the structures of this bearing except the shielding plate 2 are prior arts, no more descriptions will be given.

[0028] As Figures 1 to 2 shown, the shielding plate 2 includes a first plate surface 22 and a first convex block 23 located on one side of the first plate surface 22. The first convex block 23 is arranged around the outer diameter of the first plate surface 22; the second through hole 21 is located in the middle of the first plate surface 22, and both ends of the outer diameter of the magnetic levitation bearing body 4 are respectively abutted against the first convex block 23 and the end face housing 12.

[0029] Among them, the shielding plate 2 may also have only the first plate surface 22, and its structure is not unique.

[0030] As Figures 1 to 2 shown, a motor, the motor includes a motor barrel 5, a main shaft 6, a stator 7, a magnetic levitation bearing and a bearing seat 8. The bearing seat 8 is installed at both ends of the motor barrel 5, the magnetic levitation bearing is installed inside the bearing seat 8, the main shaft 6 is erected and passes through the bearing seat 8 and the magnetic levitation bearing, and the stator 7 is installed in the middle of the main shaft 6. Among them, the shielding plate 2 is located on the side of the magnetic levitation bearing facing the stator 7.

[0031] Working principle: When low-frequency interference or high-frequency interference is generated by the stator 7 of the motor, the shielding effect is achieved by installing a shielding plate 2 on the magnetic levitation bearing, reflecting, absorbing, dispersing, and shielding the interference signal, thereby reducing the impact on the magnetic levitation bearing sensor 3. Through comparative tests, this structure can effectively reduce the interference impact.

[0032] Specifically, the material of the shielding plate 2 is No. 45 steel or silicon steel sheet. Using the shielding plate 2 made of this material, it has good shielding effect and low cost.

[0033] The above is the description of the embodiments of the present utility model. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic levitation bearing with strong anti-interference ability, characterized in that, The bearing comprises: A bearing housing (1), which includes a toroidal housing (11) and an end face housing (12) provided at one end of the toroidal housing (11). A first through hole (13) is provided in the middle of the end face housing (12), and a clamping groove (14) is provided on the side of the end face housing (12) close to the toroidal housing (11); A shielding plate (2), which is installed at the other end of the toroidal housing (11). A second through hole (21) is provided in the middle of the shielding plate (2); A sensor (3), which is installed in the clamping groove (14) and is fixedly connected to the clamping groove (14) by screws; And a magnetic levitation bearing body (4), which is arranged in the inner diameter of the toroidal housing (11) and is fixedly connected to the end face housing (12) by screws.

2. A strongly anti-interference magnetic levitation bearing according to claim 1, wherein The shielding plate (2) includes a first plate surface (22) and a first convex block (23) located on one side of the first plate surface (22). The first convex block (23) is arranged around the outer diameter of the first plate surface (22); the second through hole (21) is located in the middle of the first plate surface (22).

3. A strongly anti-interference magnetic levitation bearing according to claim 2, characterized in that, The two ends of the outer diameter of the magnetic levitation bearing body (4) are respectively abutted against the first convex block (23) and the end face housing (12).

4. A magnetic levitation bearing with strong anti-interference ability according to claim 3, characterized in that, The material of the shielding plate (2) is No. 45 steel or silicon steel sheet.

5. A motor, which includes a motor barrel (5), a main shaft (6), a stator (7), a magnetic levitation bearing, and a bearing seat (8). The bearing seat (8) is installed at both ends of the motor barrel (5), the magnetic levitation bearing is installed inside the bearing seat (8), the main shaft (6) is erected and passes through the bearing seat (8) and the magnetic levitation bearing, and the stator (7) is installed in the middle of the main shaft (6); characterized in that, The magnetic levitation bearing adopts a strong anti-interference magnetic levitation bearing according to any one of claims 1-4.

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