Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Upstream of runner
Patent
1988-08-17
1989-09-19
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Upstream of runner
415162, F01D 1716
Patent
active
048676357
ABSTRACT:
The invention relates to variable guide vane arrangements for axial flow compressors of aircraft gas turbine engines. The variable guide vane arrangement comprises a plurality of stator vanes rotatably mounted in a stator structure of the compressor. A control ring surrounds and is normally coaxially with the compressor axis, and a plurality of operating levers extend from the control ring to their respective stator vane. The control ring is movable laterally with respect to the axis of the compressor so that the stator vanes in a first half of the compressor are rotated in one direction so that the first half of the compressor operates at a higher pressure ratio and the stator vanes in a second half of the compressor are rotated in the opposite direction so that the second half of the compressor operates at a lower pressure ratio. The half of the compressor operating at a higher pressure ratio is arranged to coincide with a zone of the compressor which has a low intake pressure caused by the inlet flow distortions.
REFERENCES:
patent: 3056541 (1962-10-01), Foweraker
patent: 3702121 (1972-11-01), Millman
patent: 3736070 (1973-05-01), Moskowitz et al.
patent: 3861822 (1975-01-01), Wanger
patent: 4049360 (1977-09-01), Snell
patent: 4373859 (1983-02-01), Thebert
patent: 4400135 (1983-08-01), Thebert
Garrett Robert E.
Pitko Joseph M.
Rolls-Royce plc
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