Stator assembly of a magnetic suspension bearing and manufacturing method

Patent metadata

Field	Value
Publication number	US-10851835-B2
Application number	US-201615774118-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Dec 14, 2015
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

The present disclosure relates to a stator assembly of a magnetic suspension bearing and a manufacturing method, wherein the stator assembly includes stator cores, coils and two stator core frames, two of the stator core frames being respectively engaged at both ends of the stator core along an axial direction thereof, wherein a concave portion is provided at an engaged end of one of the stator core frames, and a convex portion is provided at an engaged end of the other of the stator core frames, the concave portion and the convex portion are engaged with each other, and each of the coils is wound correspondingly to teeth of the stator cores.

First claim

The invention claimed is:

1. A magnetic suspension bearing comprising a stator assembly, wherein the stator assembly of the magnetic suspension bearing comprises:
a stator core;
a plurality of coils, each of the coils is wound correspondingly on each of a plurality of teeth of the stator core;
two stator core frames, respectively engaged at both ends of the stator core along an axial direction thereof, wherein a concave portion is provided at an engaged end of one of the stator core frames, a convex portion is provided at an engaged end of the other of the stator core frames, the concave portion and the convex portion are engaged with each other, and a conductive sheet insertion hole is provided at one end of the stator core frame opposite to the engaged end;
a circuit board, provided at an outer end of one of the stator core frames to connect an end of each of the plurality of coils and abutting against the stator core frame; and
a conductive sheet, located in the conductive sheet insertion hole, and with one end connected to the end of the coil and the other end connected to the circuit board;
wherein, a first mounting hole is provided at one end of the stator core frame opposite to the engaged end, and a second mounting hole is provided on the circuit board, for fixing the circuit board on the stator core frame by fasteners passing through the first mounting hole and the second mounting hole.

2. The magnetic suspension bearing according to claim 1 , wherein the concave portion and the convex portion are provided at the engaged end of each of the stator core frames, and an arrangement form of the concave portion and the convex portion on the engaged ends of two stator core frames is the same.

3. The magnetic suspension bearing according to claim 1 , wherein the stator core frame comprises an annular substrate and a plurality of tooth insulations provided spacedly on an inner circumference of the annular substrate, wherein each tooth insulation corresponding to one of the teeth on the stator core, for surrounding a circumferential surface of the teeth, and adjacent tooth insulations are connected with each other to form a trough insulation to surround a surface of a trough between adjacent teeth.

4. The magnetic suspension bearing according to claim 3 , wherein each of the tooth insulations comprises:
a cladding portion being a folded sheet structure and having an inner surface configured to be adapted to a circumferential surface of the teeth, a first end of the folded sheet structure along a radial direction of the stator core frame is provided on the inner circumference of the annular substrate; and
a blocking portion provided on a second end of the folded sheet structure along a radial direction of the stator core frame to block the coils that are wound on an outer surface of the folded sheet structure.

5. The magnetic suspension bearing according to claim 4 , wherein the blocking portion is adapted to the folded sheet structure in shape and higher than the outer surface of the folded sheet structure, and a circle is enclosed by an inner side of each of the blocking portions.

6. The magnetic suspension bearing according to claim 4 , wherein a length of the folded sheet structure along the radial direction of the stator core frame is the same as a height of the teeth.

7. The magnetic suspension bearing according to claim 3 , wherein adjacent tooth insulations are connected by an attachment portion, the attachment portion being a sheet structure adapted to the trough in shape, the trough insulation is formed by the sheet structure and lateral sides of two adjacent tooth insulations.

8. The magnetic suspension bearing according to claim 3 , wherein the stator core frame further comprises an installation positioning pin, the installation positioning pin being provided on the annular substrate for mating with a positioning hole on the stator core.

9. The magnetic suspension bearing according to claim 3 , wherein each of the coils is wound on outer surfaces of two of the tooth insulations which are engaged with each other.

10. The magnetic suspension bearing according to claim 1 , further comprising a lead-out hub, which is provided on the circuit board for providing an interface for supplying power to the coils by means of the circuit board.

11. The magnetic suspension bearing according to claim 1 , wherein a circuit board positioning pin is provided at one end of the stator core frame opposite to the engaged end, to position the circuit board.

12. A method of manufacturing the magnetic suspension bearing according to claim 1 , comprising steps as follows:
engaging the two stator core frames respectively at both ends of the stator core along the axial direction thereof;
winding the coils on each of a plurality of teeth of the stator core sequentially;
providing the circuit board, and inserting conductive sheets into each conductive sheet insertion hole in one of the stator core frames, and connecting one end of each conductive sheet with the coil and another end of each conductive sheet with the circuit board, so as to connect ends of each of the coils to the circuit board; and
passing a fastener through the first mounting hole and the second mounting hole, so as to fix the circuit board on an outer end of one of the stator core frames and make the circuit board abut against the stator core frame.

Assignees

• Gree Green Refrigeration Tech Ct Co Ltd Zhuhai

Inventors

• Zhang Fang
• Liu Jianning
• Jia Jinxin
• Zhang Xiaobo
• Zhong Chengbao
• Tian Siyuan
• Gong Gao
• Li Guanghai
• Guo Changguang

Classifications

• F16C33/00 Primary

  Parts of bearings; Special methods for making bearings or parts thereof · CPC title

• F16C32/0476

  with active support of one degree of freedom, e.g. axial magnetic bearings · CPC title

• F16C32/044

  Active magnetic bearings · CPC title

• F16C43/00

  Assembling bearings · CPC title

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title