Performance envelope extension method for a gas turbine engine

Details Performance envelope extension method for a gas turbine engine Performance envelope extension method for a gas turbine engine

1987-12-14

1989-08-08

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 39091, F02C 700, F01D 2536

Patent

active

048541206

ABSTRACT:
The present invention relates to a device for extending the performance life of a gas turbine engine by rotating the turbine after shutdown to achieve uniform cooling. The apparatus includes a motor, a high ratio gearset engaged with the motor, an overridable coupling means engaging the gearset with an accessory shaft of the turbine, and a logic circuit. The circuit determines when the engine has been shut down and continues to rotate the turbine for a predetermined period of time. If an external force interferes with the post-shutdown turning, the circuit will sense that force and compensate for it.

REFERENCES:
patent: 2129529 (1938-09-01), Howard
patent: 3617253 (1952-11-01), Fusner et al.
patent: 3919894 (1975-11-01), Keeter et al.
patent: 4069424 (1978-11-01), Burkett
patent: 4211070 (1980-07-01), Portmann
patent: 4507926 (1985-04-01), Teckentrup et al.
patent: 4643637 (1987-02-01), Strickler

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