Title:
【発明の名称】遠心圧縮機
Document Type and Number:
Japanese Patent JP2873581
Kind Code:
B2
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 disc (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.
Inventors:
KUROIWA KAZUO
Application Number:
JP30614688A
Publication Date:
March 24, 1999
Filing Date:
December 05, 1988
Export Citation:
Assignee:
KUROIWA KAZUO
International Classes:
F04D29/16; F04D17/10; F04D21/00; F04D29/08; F04D29/44; F04D29/46; (IPC1-7): F04D21/00; F04D17/10; F04D29/16; F04D29/44; F04D29/46
Domestic Patent References:
| JP51124809A | ||||
| JP628395U | ||||
| JP5038501U | ||||
| JP2613668Y1 |