Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Pump outlet or casing portion expands in downstream direction
Patent
1989-11-29
1992-06-23
Look, Edward K.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Pump outlet or casing portion expands in downstream direction
4152112, 4151701, F01D 100, F01D 900
Patent
active
051238110
ABSTRACT:
A supersonic centrifugal compressor comprising an impeller (2), a plurality of vanes (13) radially extending in the impeller to form a plurality of radially extending flow channels therebetween, and a diffuser (3) circumferentially surrounding the impeller and having a circumferential flow channel communicating with the flow channels of the impeller. In the impeller (2), at least one nozzle (18) is provided at the outlet of the flow channel and a contraction (20) is provided at the inlet of the flow channel, so that the flow channel is a low speed flow channel (21). Thus the speed of the fluid is low in the low speed flow channel (21) and high at the outlet of the nozzle (18). Also, in the diffuser (3), backflow preventing and friction reducing projections (33) are provided concentrically in the inner surface of the casing (11). Also, leakage preventing and pressure reducing vanes (37) are provided between the side disk (14, 15) of the impeller (2) and the casing (11), rotatably with the rotatable drive shaft (6). Also, the diffuser (3) comprises a concentric annular contraction (41) and an annular divergent channel (42) on the downstream side thereof. A cross-sectional area of the flow channel at the outlet of the annular divergent channel (42) is greater than that of the flow channel at the largest cross-sectional region (44) on the upstream side of the annular contraction (41), to allow control of the shock wave.
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Patent Abstracts of Japan, vol. 9, No. 297 (M-432) (2020) 25 Nov. 1985.
Patent Abstracts of Japan, vol. 7, No. 193 (M-238) (1338) 24 Aug. 1983.
Look Edward K.
Nguyen Hoang
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