Invention Grant
- Patent Title: Centrifugal compressor
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Application No.: US17955256Application Date: 2022-09-28
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Publication No.: US11808279B1Publication Date: 2023-11-07
- Inventor: Kuuma Okada , Hideki Fujiwara
- Applicant: DAIKIN INDUSTRIES, LTD.
- Applicant Address: JP Osaka
- Assignee: Daikin Industries, Ltd.
- Current Assignee: Daikin Industries, Ltd.
- Current Assignee Address: JP Osaka
- Agency: Global IP Counselors, LLP
- Priority: JP 20062132 2020.03.31
- Main IPC: F04D29/058
- IPC: F04D29/058 ; F04D29/62 ; F04D29/051 ; F16C32/04

Abstract:
A centrifugal compressor includes a tubular shape casing extending in an axial direction, a motor stator fixed to an inside of the casing in a radial direction, a shaft disposed inside of the motor stator in the radial direction and extending in the axial direction, a motor rotor fixed to the shaft and facing the motor stator with a gap in the radial direction, a compression unit fixed to an end portion of the shaft on one side in the axial direction, a first thrust magnetic bearing disposed between the motor rotor and the impeller in the axial direction, and a second thrust magnetic bearing disposed on an other side in the axial direction relative to the motor rotor. A magnetic attraction force of the second thrust magnetic bearing toward the other side is larger than a magnetic attraction force of the first thrust magnetic bearing toward the one side.
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