Magnetic suspension bearing assembly for main shaft installation

Abstract

The utility model discloses a magnetic suspension bearing assembly for mounting a main shaft. The magnetic suspension bearing assembly comprises a bearing seat, a rotor bearing and a transition flange, bearing grooves are formed in the front ends of the bearing seats; the rotor bearing is at least partially arranged in the bearing groove, and a first rotor through hole through which the main shaft can penetrate is formed in the middle; the transition flange is arranged at the front end of the bearing groove and connected with the bearing seat, and a second rotor through hole allowing the main shaft to penetrate through is formed in the middle; the difference value D1 between the inner diameter of the first rotor through hole and the diameter of the main shaft is set to be greater than or equal to 0.48 mm and less than or equal to 0.72 mm; the difference D2 between the inner diameter of the second rotor through hole and the diameter of the main shaft is set to be larger than or equal to 0.24 mm and smaller than or equal to 0.36 mm. Through the arrangement, when the main shaft penetrates through the bearing seat, the strong magnetic area part is not easily adsorbed to the rotor bearing, so that the mounting efficiency of the main shaft is improved; meanwhile, the main shaft is prevented from colliding with other parts of the magnetic suspension motor, and abrasion to the main shaft is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic suspension motors, in particular to a magnetic suspension bearing assembly for main shaft installation. Background Art

[0002] With the advancement of production technology, magnetic levitation motors are widely used in products such as wind turbines, high-precision machine tools and magnetic levitation trains due to their high energy-saving efficiency, high operating speed, long service life and low noise.

[0003] When installing the main shaft of existing magnetic levitation motors, a lifting tool is typically used to pass the main shaft through the radial magnetic bearing seat at the end and install it on the motor to improve installation efficiency. However, the main shaft generally has a strong magnetic area, and the magnetic bearing is mainly made of iron. When the main shaft passes through the magnetic bearing, the strong magnetic area is easily attracted to the magnetic bearing, causing the main shaft to deviate from the original installation direction and affecting the installation efficiency. It also makes the main shaft more likely to contact other motor components, causing wear. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a magnetic bearing assembly for main shaft installation, which can prevent the main shaft from being adsorbed to the magnetic bearing during installation.

[0005] Based on the above purpose, the present invention adopts the following technical solutions:

[0006] A magnetic levitation bearing assembly for main shaft installation includes a bearing seat, a rotor bearing, and a transition flange; a bearing slot is provided at the front end of the bearing seat; the rotor bearing is at least partially disposed in the bearing slot, with a first rotor through hole provided in the middle for the main shaft to pass through; the transition flange is disposed at the front end of the bearing slot, connected to the bearing seat, with a second rotor through hole provided in the middle for the main shaft to pass through; the difference D1 between the diameter of the first rotor through hole and the diameter of the main shaft is greater than or equal to 0.48 mm and less than or equal to 0.72 mm; the difference D2 between the diameter of the second rotor through hole and the diameter of the main shaft is greater than or equal to 0.24 mm and less than or equal to 0.36 mm.

[0007] Furthermore, the transition flange is made of aluminum alloy.

[0008] Furthermore, the magnetic suspension bearing assembly also includes a thrust magnetic bearing; the thrust magnetic bearing is arranged at the rear end of the bearing seat and is fixedly connected to the bearing seat.

[0009] Furthermore, a thrust spacer is provided between the thrust magnetic bearing and the bearing seat.

[0010] Furthermore, the thrust magnetic bearing includes a first bearing and a second bearing; the first bearing is installed to the rear end of the thrust spacer; and a spacer is provided between the first bearing and the second bearing.

[0011] The utility model provides a magnetic bearing assembly for spindle installation, which includes a transition flange on the front side of the bearing slot. The difference between the diameter of the second rotor through-hole in the center of the transition flange and the spindle diameter is smaller than the difference between the diameter of the first rotor through-hole in the center of the rotor bearing and the spindle diameter. This limits radial displacement of the spindle, prevents the spindle from adsorbing onto the rotor bearing, and improves spindle installation efficiency. Furthermore, limiting the diameters of the first and second rotor through-holes prevents the spindle from vibrating excessively during installation, potentially contacting other motor components and causing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a cross-sectional view of a magnetic bearing assembly provided according to the utility model;

[0013] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0015] Figure 4 It is a structural schematic diagram of the transition flange provided by the utility model. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] like Figures 1 to 3 As shown, this embodiment provides a magnetic bearing assembly for main shaft installation. The magnetic bearing assembly includes a bearing seat 11, a rotor bearing 12 and a transition flange 13. Specifically, a bearing groove 111 is provided at the front end of the bearing seat 11. The rotor bearing 12 is at least partially arranged in the bearing groove 111, and a first rotor through hole 121 is provided in the middle for the main shaft 200 to pass through. The transition flange 13 is arranged at the front end of the bearing groove 111, connected to the bearing seat 11, and a second rotor through hole 131 is provided in the middle for the main shaft 200 to pass through. In order to clearly illustrate the technical solution of the present application, the following is also defined. Figure 1 Front and rear sides shown.

[0018] like Figure 2 and Figure 3 As shown, the difference D1 between the diameter of the first rotor through hole 121 and the diameter of the main shaft 200 is greater than or equal to 0.48 mm and less than or equal to 0.72 mm. The difference D2 between the diameter of the second rotor through hole 131 and the diameter of the main shaft 200 is greater than or equal to 0.24 mm and less than 0.36 mm.

[0019] Through the above-described arrangement, the first rotor through-hole 121 and the second rotor through-hole 131 provide sufficient clearance for the main shaft to pass through. Furthermore, the radial displacement of the main shaft 200 is limited, preventing the main shaft 200 from contacting other motor components due to excessive vibration during installation or rotation, thereby causing wear. Furthermore, the difference D2 between the diameter of the second rotor through-hole 131 and the diameter of the main shaft 200 is smaller than the difference D1 between the diameter of the first rotor through-hole 121 and the diameter of the main shaft 200. This allows the second rotor through-hole 131 to limit the radial movement of the main shaft 200, preventing the strong magnetic region 21 from being partially attracted to the rotor bearing 12 when the main shaft 200 passes through it, causing the main shaft 200 to deviate from its original installation path and contact other components of the magnetic levitation motor, thereby affecting the installation efficiency of the main shaft 200.

[0020] like Figure 4 As shown, a plurality of bolt holes 132 are evenly provided around the edge of the transition flange 13 so as to fix the transition flange 13 and the bearing seat 11 by bolts.

[0021] More specifically, the transition flange 13 is made of aluminum alloy to prevent the strong magnetic region 21 of the main shaft 200 from being partially attracted to the transition flange 13 .

[0022] like Figure 1 As shown, the magnetic bearing assembly further includes a thrust magnetic bearing 14, which is disposed at the rear end of the bearing seat 11 and is fixedly connected to the bearing seat 11. The thrust magnetic bearing 14 is used to support the thrust plate 22 on the rear side of the main shaft 200, thereby limiting the axial displacement of the main shaft 200 and improving the structural stability of the main shaft 200 in the magnetic levitation motor.

[0023] Specifically, a thrust spacer 15 is provided between the thrust magnetic bearing 14 and the bearing seat 11 to maintain a specified axial distance between the thrust magnetic bearing 14 and the bearing seat 11 .

[0024] The thrust magnetic bearing 14 includes a first bearing 141 and a second bearing 142. The first bearing 141 is mounted to the thrust spacer 15. A spacer 143 is provided between the first bearing 141 and the second bearing 142 to prevent the first bearing 141 and the second bearing 142 from contacting and rubbing against each other.

[0025] In summary, the present application provides a magnetic bearing assembly. When the front end of the main shaft 200 passes through the transition flange 13, the first rotor through-hole 121 limits the radial movement of the main shaft 200, preventing the strong magnetic region 21 in the middle of the main shaft 200 from being partially attracted to the rotor bearing 12 and affecting the installation efficiency of the main shaft 200. Furthermore, the diameters of the first rotor through-hole 121 and the second rotor through-hole 131 are also restricted, preventing the main shaft 200 from vibrating excessively during installation, potentially contacting other motor components and causing wear.

[0026] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professional and technical personnel in the field can implement or use the present invention. Various modifications to these embodiments will be obvious to professional and technical personnel 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic bearing assembly for spindle installation, characterized in that: include: A bearing seat (11), wherein a bearing groove (111) is provided at a front end of the bearing seat (11); a rotor bearing (12), the rotor bearing (12) being at least partially disposed in the bearing groove (111), and having a first rotor through hole (121) in the middle thereof for the main shaft to pass through; a transition flange (13), the transition flange (13) being arranged at the front end of the bearing groove (111), being connected to the bearing seat (11), and having a second rotor through hole (131) in the middle for the main shaft to pass through; A difference D1 between the diameter of the first rotor through hole (121) and the diameter of the main shaft is greater than or equal to 0.48 mm and less than or equal to 0.72 mm; A difference D2 between the diameter of the second rotor through hole (131) and the diameter of the main shaft is greater than or equal to 0.24 mm and less than or equal to 0.36 mm.

2. The magnetic bearing assembly for main shaft installation according to claim 1, characterized in that: The transition flange (13) is made of aluminum alloy.

3. The magnetic bearing assembly for main shaft installation according to claim 1, characterized in that: The magnetic suspension bearing assembly further comprises a thrust magnetic bearing (14); the thrust magnetic bearing (14) is arranged at the rear end of the bearing seat (11) and is fixedly connected to the bearing seat (11).

4. The magnetic bearing assembly for main shaft installation according to claim 3, characterized in that: A thrust spacer ring (15) is provided between the thrust magnetic bearing (14) and the bearing seat (11).

5. The magnetic bearing assembly for main shaft installation according to claim 4, characterized in that: The thrust magnetic bearing (14) comprises a first bearing (141) and a second bearing (142); the first bearing (141) is mounted to the rear end of the thrust spacer (15); and a spacer ring (143) is provided between the first bearing (141) and the second bearing (142).

Images