ADJUSTABLE-BLADE TURBINE
First Claim
1. An axial flow gas turbine comprising, a turbine rotor having radially projecting, cambered airfoil blades, a plurality of angularly spaced, radially projecting, nozzle vanes defining throat sections from which a hot gas stream is discharged toward said blades to drive said rotor, a plurality of angularly spaced, radially projecting, uncambered outlet guide vanes for turning the gas stream discharge from the rotor blades toward an axial direction, fixed, uncambered, vanes downstream of said outlet guide vanes for further turning the gas stream to an axial direction, said fixed vanes being generally aligned with sElected outlet guide vanes, and means for pivoting said nozzle vanes and said outlet guide vanes about their respective axes as a function of gas temperature for maintaining an essentially constant flow function through the nozzle vanes, and to maintain a proper angle of attack by the hot gas stream toward said outlet guide vanes, said pivoting means pivoting the nozzle vanes and the outlet guide vanes in the same direction (either clockwise or counterclockwise) with a fixed ratio of angular movement of the nozzle vanes relative to the outlet guide vanes with the latter moving to a greater angular extent, said outlet guide vanes further having extreme positions of pivotal movement which are equiangular from an axial direction.
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Accused Products
Abstract
A gas turbine engine is shown in which the turbine nozzle vanes and turbine outlet guide vanes are simultaneously pivotal to obtain greater efficiencies over a broad range of gas stream energy levels.
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Citations
1 Claim
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1. An axial flow gas turbine comprising, a turbine rotor having radially projecting, cambered airfoil blades, a plurality of angularly spaced, radially projecting, nozzle vanes defining throat sections from which a hot gas stream is discharged toward said blades to drive said rotor, a plurality of angularly spaced, radially projecting, uncambered outlet guide vanes for turning the gas stream discharge from the rotor blades toward an axial direction, fixed, uncambered, vanes downstream of said outlet guide vanes for further turning the gas stream to an axial direction, said fixed vanes being generally aligned with sElected outlet guide vanes, and means for pivoting said nozzle vanes and said outlet guide vanes about their respective axes as a function of gas temperature for maintaining an essentially constant flow function through the nozzle vanes, and to maintain a proper angle of attack by the hot gas stream toward said outlet guide vanes, said pivoting means pivoting the nozzle vanes and the outlet guide vanes in the same direction (either clockwise or counterclockwise) with a fixed ratio of angular movement of the nozzle vanes relative to the outlet guide vanes with the latter moving to a greater angular extent, said outlet guide vanes further having extreme positions of pivotal movement which are equiangular from an axial direction.
Specification
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- Resources
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Current AssigneeJack D. Wright, Werner E. Howald
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Original AssigneeJack D. Wright, Werner E. Howald
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InventorsWright, Jack D., Howald, Werner E.
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Primary Examiner(s)Raduazo, Henry F.
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Application NumberUS05/015,353Time in Patent Office673 DaysField of Search60/39.25,39.16 415/17,148,149,150,162,47US Class Current415/149.4CPC Class CodesF01D 17/162 for axial flow, i.e. the va...
