Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Runner – shaft – or separate motor operated
Patent
1989-11-22
1991-09-03
Kwon, John T.
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Runner, shaft, or separate motor operated
415162, F01D 1700
Patent
active
050448790
ABSTRACT:
A variable stator vane arrangement for an axial flow compressor comprises a plurality of stages of variable pitch stator vanes each of which is operated by a respective control ring. The vanes in each stage are connected to the control rings by operating levers. An axially extending member is connected to each control ring by operating links. The axially extending member is arranged in a plane substantially tangential to each control ring and is movable in the plane substantially tangential to the control rings to change the pitch of the variable pitch stator vanes. Hydraulic rams are provided to move the axially extending member. The hydraulic rams may be operated to give either proportional or non-proportional movement of the variable pitch stator vanes. A controller may use signals from position detectors positioned on the control rings or position detectors positioned on the hydraulic rams together with compressor parameters to control the pitch of the vanes.
REFERENCES:
patent: 2613029 (1952-10-01), Wilde
patent: 2929546 (1960-03-01), Wilkes, Jr.
patent: 3377799 (1968-04-01), Geyer
patent: 3502260 (1970-03-01), Koff
patent: 3685920 (1972-08-01), Burge
patent: 4874287 (1989-10-01), Grieb
Kwon John T.
Rolls-Royce plc
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