Combustor drain valve

Details Combustor drain valve Combustor drain valve

2007-01-02

2007-01-02

Rodriguez, William H. (Department: 3746)

Power plants

Combustion products used as motive fluid

With safety device

C060S734000, C251S063600, C251S062000

Reexamination Certificate

active

10891266

ABSTRACT:
A system for draining fuel from the combustion chamber of a gas turbine engine in the event of a false start includes associated passageways and a straight through flow pilot air actuated poppet valve. The valve is normally open and actuated by the pilot air to close off the combustion chamber from the drain. A return spring biases the valve to open upon release of pilot air pressure acting on the valve. The valve housing has a piston section with a pilot air chamber and a section defining the passageways for the drain. The drain passageway extends along a straight path at an oblique angle to a piston axis along which a piston actuator moves in response to the return spring and/or the pilot air pressure. The valve also includes a position feedback system for detecting the state of the valve.

REFERENCES:
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patent: 6050081 (2000-04-01), Jansen et al.
patent: 6679472 (2004-01-01), Baugh

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