| 摘要 |
An air cooled gas turbine engine includes a coolant flow control valve for regulating flow of compressor discharge air to a turbine rotor in accordance with compressor discharge pressure and the operating temperature of an air cooled turbine component of the engine and wherein the coolant flow control valve is associated with a seal having a fixed stator member connected to a compressor frame and a movable labyrinth seal rotor driven in response to gas turbine engine operation to seal between high and low pressure regions; the coolant flow control valve including a pressurizable chamber formed by the stator member and an annular member secured between the stator member and a movable leaf spring valve element that is subjected to compressor discharge pressure to close the valve element at engine cruise conditions and wherein means are provided responsive to temperature of the turbine component to bleed the pressurizable chamber to cause the bellows to bias the valve element into an open position thereby to modulate coolant flow.
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