Method and apparatus for expanding operating range of centrifugal compressor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 10, 2002
Grant Date -
Oct 11, 2001
app pub date -
Mar 12, 2001
filing date -
Apr 7, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a centrifugal compressor, a housing is provided which has an annular treatment cavity in a shroud wall. The shroud wall has a first opening providing communication between an installed zone of an impeller and the treatment cavity, and a second opening providing communication between the treatment cavity and a zone upstream of the first opening so as to circulate air a during a low-flow-rate operation. Louvers are arranged in the second opening in circumferentially equidistantly spaced apart relationship with each other and inclined reversely to a rotative direction of the impeller so that the air a sucked to the treatment cavity is, when discharged through the second opening, subjected to directional flow guide action with a whirling direction reverse to the rotative direction of the impeller.
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