Variable pipe diffuser for centrifugal compressor

Details Variable pipe diffuser for centrifugal compressor Variable pipe diffuser for centrifugal compressor

1996-06-07

1998-09-15

Verdier, Christopher

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Runner, shaft, or separate motor operated

415148, F04D 2946

Patent

active

058070710

ABSTRACT:
A variable pipe diffuser for use in a centrifugal compressor. The variable pipe diffuser includes an outer ring and an inner ring which is rotatable circumferentially within the outer ring between a first, open position and a second, closed position. In an open position, complementary air channel sections of the inner and outer rings are aligned with one another to allow a maximum flow of refrigerant through the diffuser. In a closed position, the flow channels of the ring sections are misaligned and the flow of refrigerant through the diffuser is restricted. By adjusting the diffuser rings toward a closed position, surge conditions can be avoided even in the case where a high compressor pressure ratio is required.

REFERENCES:
patent: Re6285 (1875-02-01), Ross
patent: 3784318 (1974-01-01), Davis
patent: 5372485 (1994-12-01), Sumser et al.

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