Cooling of a magnetic bearing

Details Cooling of a magnetic bearing Cooling of a magnetic bearing

2009-04-07

2011-12-06

Leung, Quyen (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

Reexamination Certificate

active

08072104

ABSTRACT:
A rotary machine, which can be a turbine or a rotary compressor, is provided. The rotary machine includes a stationary housing and a rotating shaft supported in the housing by a magnetic bearing, whereby the magnetic bearing includes a laminated bearing journal with a shaft-mounted rotating lamination and a corresponding housing-mounted stationary lamination surrounding the rotating lamination, whereby both laminations extend axially to the shaft within a bearing portion, limited on one side by the end of the shaft. In addition, an axial duct extends axially through the shaft from the end to at least one substantially radial duct connecting the axial duct with an orifice in the shaft surface adjacent the other side of the bearing portion, and whereby a stationary tube is inserted in the axial duct supplying it with fluid. This arrangement provides sufficient cooling for a laminated bearing journal of the rotary machine.

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