US 11,905,994 B2
Magnetic bearing, compressor and air conditioner
Mingzhu Dong, Guangdong (CN); Yusheng Hu, Guangdong (CN); Bin Chen, Guangdong (CN); Xiaobo Zhang, Guangdong (CN); Fang Zhang, Guangdong (CN); Gao Gong, Guangdong (CN); Chao Zhang, Guangdong (CN); and Mingxing Deng, Guangdong (CN)
Assigned to Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
Appl. No. 17/765,329
Filed by Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
PCT Filed Aug. 24, 2020, PCT No. PCT/CN2020/110800
§ 371(c)(1), (2) Date Mar. 30, 2022,
PCT Pub. No. WO2021/135276, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 201911411355.9 (CN), filed on Dec. 31, 2019.
Prior Publication US 2022/0333644 A1, Oct. 20, 2022
Int. Cl. F16C 32/04 (2006.01); F25B 31/02 (2006.01)
CPC F16C 32/0474 (2013.01) [F16C 2360/00 (2013.01); F25B 31/026 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A magnetic bearing, comprising:
a radial stator having a plurality of stator teeth extending inwardly in a radial direction of the radial stator;
two axial stators arranged on two axial sides of the stator teeth, respectively; and
radial control coils wound on the stator teeth, each of the radial control coils being located outside an area of the stator teeth covered oppositely by the two axial stators;
wherein each axial stator is configured with a first annular groove on a side facing the stator teeth, and the magnetic bearing further comprises axial control coils arranged in the first annular grooves;
wherein the first annular grooves have a first groove circumferential wall close to an axis of the axial stator and a second groove circumferential wall far away the axis of the axial stator, the first groove circumferential wall having a diameter D1 and the second groove circumferential wall having a diameter D2, and the magnetic bearing is provided to be assembled with a rotating shaft with a rotor having an outer diameter d, where D2>d>D1.