F - Mech Eng,Light,Heat,Weapons – 02 – K
Patent
F - Mech Eng,Light,Heat,Weapons
02
K
60/133
F02K 99/00 (2009.01) F01D 5/08 (2006.01) F01D 11/24 (2006.01)
Patent
CA 1180562
ABSTRACT OF THE DISCLOSURE A structure and method for providing cooling fluids from a compression section to a turbine section of an axially flow rotary machine is disclosed. Various construction details and steps of the method enable the machine to minimize the effect that un- scheduled variations in the temperature of the cooling fluids have on operating clearances in the turbine section. These unscheduled variations may result from changes in ambient temperature and component deterior- ation. An internal cooling fluid from the discharge region of the rearmost compressor is used to modulate the flow of a second fluid impinged on the exterior of the outer case for controlling the clearance between an array of rotor blades and a coolable stator shroud spaced radially outwardly of the rotor blades. In one embodiment, a valve for modulating the flow of the second fluid has at least one thermostatic bi- metallic spring for transducing a change in temperature into a displacement. The displacement changes the flow area Af between a valve head and a conical seat in the conduit for the second fluid through the valve.
383559
Griffin James G.
Schwarz Frederick M.
Swabey Ogilvy Renault
United Technologies Corporation
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