Centrifugal compressor and magnetic bearing backup system for centrifugal compressor
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United States of America Patent
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Apr 28, 2020
Grant Date -
Jan 25, 2018
app pub date -
Jul 25, 2016
filing date -
Jul 25, 2016
priority date (Note) -
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Abstract
A centrifugal compressor includes a casing, an impeller, a motor, a diffuser, a magnetic bearing, and a magnetic bearing backup system including at least one dynamic gas bearing and at least one hydrostatic gas bearing. The impeller is attached to a shaft rotatable about a rotation axis. The motor is configured and arranged to rotate the shaft in order to rotate the impeller. The magnetic bearing rotatably supports the shaft. The magnetic bearing backup system is configured and arranged to support the shaft when the magnetic bearing stops operating. The at least one dynamic gas bearing and the at least one hydrostatic gas bearing of the magnetic bearing backup system are disposed radially inwardly relative to the magnetic bearing.
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