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US 5,307,624 AGranted
Variable area bypass valve assembly
AssigneeGeneral Electric Company
InventorsMichael Even-Nur, Carl J. Hoffmann, Jr., Robert H. Kraimer
Life of this patent
Estimating the term…
Abstract
A bypass valve assembly includes an outer casing and a spaced outer liner defining an annular bypass channel for channeling bypass air. The outer liner includes a plurality of circumferentially spaced slots around which are positioned an annular valve body. The valve body is positionable from a closed position substantially blocking bypass airflow into the slots to an open position uncovering the slots. Positioning means rotates and translates the valve body over the outer liner for covering and uncovering the slots.
Claims20
A bypass valve assembly for a gas turbine engine comprising:
- an annular outer casing;
- an annular outer liner spaced radially inwardly from said outer casing to define a bypass channel for channeling bypass air, said outer liner including a plurality of circumferentially spaced slots for channeling said bypass air from said bypass channel to inside said outer liner;
- an annular valve body slidably disposed around said outer liner and positionable from a closed position, substantially blocking flow of said bypass air from said bypass channel into said slots, to an open position uncovering said slots for allowing unobstructed flow of said bypass air into said slots;
- and
- means for positioning said valve body between said closed and open positions by rotating and translating said valve body over said outer liner, wherein said positioning means comprises:
- three fixed length swing links and three adjustable length swing links circumferentially spaced from each other around said outer liner, each swing link having a first end pivotally connected to said valve body, and a second end pivotally connected to at least one of said outer casing and said outer liner, said swing links being sized and positioned for uniformly translating said valve body without tilting, said adjustable length swing links being adjusted in length to extend to a plane of said valve body defined by said three fixed length swing links;
- and
- means for rotating said valve body so that said swing links translate said valve body for positioning said valve body between said closed and open positions.
5 more elements
A bypass valve assembly for a gas turbine engine comprising:
- an annular outer casing:
- an annular outer liner spaced radially inwardly from said outer casing to define a bypass channel for channeling bypass air, said outer liner including a plurality of circumferentially spaced slots for channeling said bypass air from said bypass channel to inside said outer liner:
- an annular valve body slidably disposed around said outer liner and positionable from a closed position, substantially blocking flow of said bypass air from said bypass channel into said slots, to an open position uncovering said slots for allowing unobstructed flow of said bypass air into said slots;
- and
- means for positioning said valve body between said closed and open positions by rotating and translating said valve body over said outer liner, wherein said positioning means comprises:
- at least three swing links circumferentially spaced from each other around said outer liner, each swing link having a first end pivotally connected to said valve body, and a second end pivotally connected solely to said outer liner, said swing links being sized and positioned for uniformly translating said valve body;
- and
- means for rotating said valve body so that said swing links translate said valve body for positioning said valve body between said closed and open positions.
5 more elements
A bypass valve assembly for a gas turbine engine comprising:
- an annular outer casing;
- an annular outer liner spaced radially inwardly from said outer casing to define a bypass channel for channeling bypass air, said outer liner including a plurality of circumferentially spaced slots for channeling said bypass air from said bypass channel to inside said outer liner:
- an annular valve body slidably disposed around said outer linear and positionable from a closed position, substantially blocking flow of said bypass air from said bypass channel into said slots, to an open position uncovering said slots for allowing unobstructed flow of said bypass air into said slots, wherein said valve body is generally U-shaped and includes:
- an annular base;
- first and second legs extending from said base, each of said legs being U-shaped and having first and second sidewalls, said legs being spaced apart so that said valve body fully covers said slots when in said closed position;
- and
- a seal member disposed in each of said legs between said sidewalls and having a contact edge extending outwardly from between said sidewalls to contact said outer liner for providing a seal therewith;
- and
- means for positioning said valve body between said closed and open positions by rotating and translating said valve body over said outer line.
6 more elements
Dependencies are inferred from the claim text.