Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1980-06-23
1983-06-14
Garrett, Robert E.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
415151, F02C 310
Patent
active
043875637
ABSTRACT:
A gas turbine engine has a compressor and power turbine driven by gas flow across a nozzle arrangement that includes a partial admission gate valve therein movable into and out of overlying relationship with a limited number of vanes of the nozzle in order to control power output therefrom during part load operation of the engine. Each gate has a flat downstream face. The gates are moved between stored and blocking positions. Each gate face is engageable with flat valve seat surfaces on nozzle vanes when in the blocking position whereby motive gas pressure will hold the gates sealed against the seats. The gates are operated by quick response pneumatic operators having a regulated source of pressure applied to the operators to move the gates to their blocking positions during a low power road load mode of engine operation; and wherein means are included to produce a quick opening of the gate valve from its partial blocking position to a full open position during a time period that prevents turbine compressor surge as the gas turbine engine responds to a higher power demand wherein greater gas flows through the nozzle for increasing power output from the power turbine of the engine.
REFERENCES:
patent: 2565178 (1951-08-01), Imbert
patent: 2889117 (1959-06-01), Wimpress
patent: 3025668 (1962-03-01), Mock
patent: 3124931 (1964-03-01), Mock
patent: 3779666 (1973-12-01), Snell
Evans J. C.
Garrett Robert E.
General Motors Corporation
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