Magnetic suspension bearing assembly free of secondary processing and magnetic suspension motor

Abstract

The utility model discloses a magnetic suspension bearing assembly free of secondary processing and a magnetic suspension motor. The magnetic suspension bearing assembly comprises a shell, a magnetic suspension bearing and a leading-out wire, a mounting groove is formed in the top of the shell in the axial direction of the shell. The magnetic suspension bearing is at least partially arranged in the mounting groove; a groove is formed in the bottom of the magnetic suspension bearing, a wire outlet hole is formed in the bottom of the shell, and the groove and the wire outlet hole are arranged side by side in the axial direction of the shell. The leading-out wire can penetrate through the wire outlet hole and the groove from the outside of the shell and is connected with the magnetic suspension bearing. The magnetic suspension motor comprises a motor barrel, a motor stator and a motor rotor. The motor stator is arranged around the inner wall of the motor barrel; the motor rotor is rotationally arranged in the motor barrel in the axial direction of the motor barrel; the magnetic suspension bearing assemblies free of secondary machining are arranged on the two sides of the motor barrel. Through the arrangement, the machining precision of the magnetic suspension bearing assembly is higher. The magnetic suspension motor reduces processing procedures and is higher in assembly efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic suspension motors, in particular to a magnetic suspension bearing component and a magnetic suspension motor free of secondary processing. Background Art

[0002] Magnetic levitation motors are widely used in magnetic levitation blowers, magnetic levitation vacuum pumps, magnetic levitation compressors, magnetic levitation refrigeration compressors and other fields due to their zero friction, oil-free lubrication and high performance. A magnetic levitation bearing assembly is arranged at both ends of the magnetic levitation motor, and the magnetic levitation bearing is installed in the magnetic levitation bearing housing. Since the control accuracy of the magnetic levitation bearing is at the micron level, the concentricity requirements for the magnetic bearings after the magnetic bearing assemblies at both ends are installed on both sides of the motor are also relatively high.

[0003] In order to arrange the lead wires of the existing magnetic bearing housing, a wire hole is generally opened on the side of the housing. However, the wire hole greatly reduces the local strength of the housing, resulting in uneven deformation of the housing in the circumferential direction when the magnetic bearing is shrink-fitted to the magnetic bearing housing, resulting in the concentricity of the matching size of the inner hole and the outer diameter of the magnetic bearing failing to meet the assembly requirements. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the purpose of the utility model is to provide a magnetic suspension bearing assembly with higher processing accuracy and free of secondary processing, and a magnetic suspension motor using the magnetic suspension bearing assembly.

[0005] Based on the above purpose, the utility model adopts the following technical solutions:

[0006] A secondary processing-free magnetic suspension bearing assembly comprises: a shell, a magnetic suspension bearing and a lead wire; the shell is provided with a mounting groove at the top along its own axial direction; the magnetic suspension bearing is at least partially arranged in the mounting groove; a groove is provided at the bottom of the magnetic suspension bearing, and a lead wire hole is provided at the bottom of the shell, and the groove and the lead wire hole are arranged side by side along the axial direction of the shell; the lead wire can pass through the lead wire hole and the groove from the outside of the shell to be connected to the magnetic suspension bearing.

[0007] Furthermore, the center of the housing and the magnetic bearing are both provided with a rotor through hole along the axial direction of the housing.

[0008] A magnetic levitation motor comprises: a motor barrel, a motor stator and a motor rotor; the motor stator is arranged around the inner wall of the motor barrel and connected to the motor barrel; the motor rotor is rotatably arranged in the motor barrel along the axial direction of the motor barrel, and the motor rotor is adapted to the motor stator; along the axial direction of the motor barrel, the above-mentioned magnetic levitation bearing assembly that does not require secondary processing is installed on both sides of the motor barrel, and the motor rotor is at least partially arranged in the rotor through hole.

[0009] The utility model provides a magnetic suspension bearing assembly that does not require secondary processing, and sets the outlet hole at the bottom of the shell, so that when the magnetic suspension bearing is shrink-fitted to the shell, the shell is uniformly deformed in the circumferential direction and has high wall strength, so that the magnetic suspension bearing has high concentricity after being installed on the motor, and the processing accuracy of the magnetic suspension bearing assembly is improved. The magnetic suspension motor provided by the utility model can avoid secondary processing of the magnetic suspension bearing assembly and the motor barrel before assembly by using the above-mentioned magnetic suspension bearing assembly, reduce processing procedures, and improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a cross-sectional view of a magnetic bearing assembly provided by the utility model;

[0011] Figure 2 It is a structural schematic diagram of the magnetic suspension bearing provided by the utility model;

[0012] Figure 3 It is a structural schematic diagram of a housing provided according to the utility model;

[0013] Figure 4 It is a cross-sectional view of the magnetic levitation motor provided according to the utility model. DETAILED DESCRIPTION

[0014] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0015] like Figure 1 As shown, this embodiment discloses a magnetic bearing assembly that does not require secondary processing. The magnetic bearing assembly includes a housing 11 and a magnetic bearing 12. The housing 11 is provided with a mounting groove 111 at the top along its own axial direction, and the magnetic bearing 12 is at least partially disposed in the mounting groove 111, and the axis of the magnetic bearing 12 is substantially coincident with the axis of the housing 11. Specifically, the magnetic bearing 12 is shrink-fitted to the housing 11. Figure 1 , Figure 2 and Figure 3As shown, the magnetic bearing assembly also includes a lead-out wire 13. A groove 121 is provided at the bottom of the magnetic bearing 12, and a wire outlet hole 112 is provided at the bottom of the shell 11. The groove 121 and the wire outlet hole 112 both extend along the axial direction of the shell 11, and the groove 121 and the wire outlet hole 112 are arranged side by side along the axial direction of the shell 11. Specifically, the groove 121 is arranged along the edge of the bottom of the magnetic bearing 121, and the wire outlet hole 112 is arranged along the edge of the bottom of the shell 11, so as not to affect the layout of other components of the magnetic bearing motor or the magnetic bearing assembly. Furthermore, the lead-out wire 13 can pass through the wire outlet hole 112 and the groove 121 from the outside of the shell 11 to be connected to the magnetic bearing 12. In order to clearly illustrate the technical solution of the present utility model, it is also defined as follows Figure 1 It can be understood that the top of the housing 11 mentioned in this embodiment is the right side of the housing 11 , the bottom of the housing 11 is the left side of the housing 11 , and the bottom of the magnetic bearing 12 is the left side of the magnetic bearing 12 .

[0016] Through the above arrangement, when the magnetic bearing 12 is shrink-fitted to the shell 11, the wall strength of the shell 11 is not affected by the wire outlet hole 112, and the radial force of the shell 11 is uniform, so that the concentricity changes of the two magnetic bearing assemblies installed on the magnetic levitation motor are kept consistent, thereby improving the processing accuracy of the magnetic bearing assembly.

[0017] like Figure 4 As shown, this embodiment also provides a magnetic levitation motor. The magnetic levitation motor includes a motor barrel 21, a motor stator 22 and a motor rotor 23. The motor stator 22 is arranged around the inner wall of the motor barrel 21 and is connected to the motor barrel 21. The motor rotor 23 is rotatably arranged in the motor barrel 21 along the axial direction of the motor barrel 21, and the motor rotor 23 is adapted to the motor stator 22. Specifically, along the axial direction of the motor barrel 21, the above-mentioned magnetic levitation bearing assembly that does not require secondary processing is installed on both sides of the motor barrel 21. As shown in FIG. Figure 1 and Figure 4 As shown, the center of the shell 11 and the magnetic bearing 12 are both provided with a rotor through hole 14 along the axial direction of the shell 11, and the rotor through hole 14 is adapted to the motor rotor 23. The motor rotor 23 is at least partially disposed in the rotor through hole 14. Furthermore, a connecting portion 113 is provided around the outer wall of the shell 11, and a boss 211 is provided on the inner wall of the motor barrel 21. The connecting portion 113 is fixedly connected to the boss 211 to fix the magnetic bearing assembly to the motor barrel 21. Among them, the connection method between the connecting portion 113 and the boss 211 can be set to a threaded connection, a shrink sleeve or other connection methods.

[0018] Through the above arrangement, while ensuring the concentricity of the magnetic suspension bearings 12 on both sides of the magnetic suspension motor, the magnetic suspension bearing assembly can be assembled with the motor barrel 21 without secondary processing, reducing the processing steps and improving the assembly efficiency. In addition, when the magnetic suspension bearing 12 needs to be disassembled due to abnormality, the magnetic suspension bearing 12 can be disassembled and replaced without affecting the secondary use of the housing 11, making the maintenance of the magnetic suspension motor more convenient and reducing the maintenance cost.

[0019] The above is a description of the embodiments of the utility model. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed in this article.

Claims

1. A magnetic bearing assembly free of secondary processing, comprising: A housing (11), wherein the housing (11) is provided with a mounting groove (111) at the top along its axial direction; A magnetic suspension bearing (12), wherein the magnetic suspension bearing (12) is at least partially disposed in the mounting groove (111); The invention is characterized in that: the magnetic bearing assembly further comprises a lead wire (13); a groove (121) is provided at the bottom of the magnetic bearing (12); a lead wire hole (112) is provided at the bottom of the housing (11); the groove (121) and the lead wire hole (112) are arranged side by side along the axial direction of the housing (11); and the lead wire (13) can pass through the lead wire hole (112) and the groove (121) from the outside of the housing (11) to be connected to the magnetic bearing (12).

2. The magnetic bearing assembly free of secondary processing as claimed in claim 1, characterized in that: The centers of the housing (11) and the magnetic suspension bearing (12) are both provided with a rotor through hole (14) along the axial direction of the housing (11).

3. A magnetic levitation motor, comprising: Motor barrel (21); a motor stator (22), the motor stator (22) being arranged around the inner wall of the motor barrel (21) and connected to the motor barrel (21); a motor rotor (23), the motor rotor (23) being rotatably disposed in the motor barrel (21) along the axial direction of the motor barrel (21), the motor rotor (23) being adapted to the motor stator (22); It is characterized in that, along the axial direction of the motor barrel (21), the two sides of the motor barrel (21) are provided with a magnetic bearing assembly free of secondary processing as claimed in claim 2, and the motor rotor (23) is at least partially arranged in the rotor through hole (14).

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