Wide flow compressor with diffuser bypass

Details Wide flow compressor with diffuser bypass Wide flow compressor with diffuser bypass

2006-11-16

2010-06-15

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid bypass

C415S056400

Reexamination Certificate

active

07736126

ABSTRACT:
A centrifugal compressor is modified by forming a bypass between the leading edge of the compressor diffuser and a point downstream from the throat of the diffuser. The bypass may be unidirectional or bi-directional. In a bi-directional embodiment, an operable flow range of the compressor can be widened in both directions of a compressor map, i.e., extending both the surge and choke margins of a compressor at the expense of normal operating efficiencies. In a unidirectional bypass embodiment the flow range may be increased only in one direction, but there is no diminishment of efficiency of the compressor at normal operating conditions. The modification provides a simple expedient for increasing flow range without a need to redesign a compressor.

REFERENCES:
patent: 4164845 (1979-08-01), Exley et al.
patent: 4487548 (1984-12-01), Leachman et al.
patent: 4658586 (1987-04-01), Iwasa
patent: 6470864 (2002-10-01), Kim et al.
patent: 6546736 (2003-04-01), Rakhmailov
patent: 2006/0005526 (2006-01-01), Tanaka et al.
patent: 59-47159 (1984-11-01), None
patent: 09119396 (1997-05-01), None
Machine Translation of JP 09119396 A from JPO website.

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