Passive bypass valve assembly
This patent describes a bypass valve assembly for controlling fluid flow in a gas turbine engine. It comprises an annular frame including an outer casing, an inner casing spaced from the outer casing to define a channel for channeling fluid flow and the outer casing including an annular opening therein; a plurality of circumferentially juxtaposed bypass valve doors disposed in the annular opening, each of the valve doors having an inner surface for facing the fluid flowable in the channel, an outer surface, a first end pivotally connected to the frame, and a second end, the doors being positionable in a first position generally parallel to the outer casing, and in a second position inclined relative to the outer casing, the fluid flow flowable against the door inner surface being effective for generating a fluid force on the door; and means for automatically positioning the doors in first and second positions in response to differential pressure across the door, the positioning means providing a torque on the doors for moving the door from the first to the second positions and including torque adjustment means for reducing the torque for at least a portion of travel of the doors from the second to the first positions.
- Assignee:
- General Electric Co., Cincinnati, OH (United States)
- Patent Number(s):
- US 5113649; A
- Application Number:
- PPN: US 7-522346
- OSTI ID:
- 5052592
- Resource Relation:
- Patent File Date: 11 May 1990
- Country of Publication:
- United States
- Language:
- English
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