Inertial speed control coupling for a gas turbine engine
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United States of America Patent
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-
Jun 23, 1987
Issued Date -
N/A
app pub date -
Jul 11, 1986
filing date -
Sep 5, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An inertial coupling is provided for substantially preventing rotational speed variations of a free power turbine in a multiple shaft gas turbine engine in response to a transient load condition. The inertial coupling comprises a gear assembly having first and second rotatable components driven respectively by the free power turbine and by the gas generator section of the gas turbine engine to cooperatively drive a free-wheeling inertial mass. The inertial mass is rotated at a constant speed during steady-state engine operation and provides sufficient rotational inertia during a transient load condition to couple the free power turbine temporarily to the gas generator section to maintain free power turbine speed substantially constant during adjustment of an engine fuel control to accommodate the changed engine load.
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