Diffuser for a centrifugal compressor

Details Diffuser for a centrifugal compressor Diffuser for a centrifugal compressor

1983-12-02

1986-03-18

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Vane or deflector

F04D 2944

Patent

active

045765502

ABSTRACT:
The diffuser of the present invention comprises a plurality of passages which intersect at radially inner ends thereof to define a quasi-vaneless annular inlet for receiving accelerated gases from an impeller of a centrifugal compressor. Each of the passages includes a throat portion having a quadrilateral cross section, including two subtantially parallel linear sidewalls and two substantially arcuate opposing sidewalls, effective for reducing the length of and thereby pressure losses from the annular inlet. The linearity and regularity of the diffuser passages enables the diffuser to be manufactured to close tolerances by electric discharge milling an annular plate utilizing a single tool. This assures uniformity and consistency between diffusers.

REFERENCES:
patent: 3333762 (1967-08-01), Vrana
patent: 3719430 (1973-03-01), Blair et al.
patent: 3743436 (1973-07-01), O'Connor
patent: 3860360 (1975-01-01), Yu
patent: 3905721 (1975-09-01), Fitzpatrick
patent: 3917434 (1975-11-01), Bandukwalla
patent: 3930746 (1976-01-01), Kronogard
patent: 4027997 (1977-06-01), Bryans

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