Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Upstream of runner
Patent
1991-10-30
1993-05-04
Look, Edward K.
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Upstream of runner
415 12, 415148, 415160, 415155, 416 39, 416132R, 416211, 416223R, F03B 318
Patent
active
052075583
ABSTRACT:
Thermally actuated flow diverters for gas turbine engines are provided which include an arrangement of vanes in spaced overlapping array, which direct, e.g. coolant air flow to rotating engine components, each vane having 3 foil components joined at 3 hinge points. That is, a leading foil positioned on the suction side of the vane, a trailing foil pivotably mounted to a rearward portion of such leading foil at a first pivot axis and a third foil positioned on the pressure side of the vane connecting a forward portion of such leading foil and such trailing foil at second and third pivot axes respectively. Either the third foil or the leading foil is fixedly mounted to engine walls of the same material, the other of these two foils defining an actuation link that is expandable and contractable relative to such walls; the third foil having a coefficient of thermal expansion greater than that of the leading foil. The vanes are positioned so that upon temperature change, the third foil contracts or expands relative to the leading foil and pivots the trailing foil toward or away from the leading foil of a downstream vane so as to control the flow of engine coolant therebetween.
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Hagle Michael P.
Wilson Paul S.
Look Edward K.
Sgantzos Mark
The United States of America as represented by the Secretary of
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