Nozzle and flapper with squeeze film damping
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United States of America Patent
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Jan 8, 1985
Grant Date -
N/A
app pub date -
Sep 18, 1982
filing date -
Sep 18, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electro-hydraulic control structure having a control input positioning a flapper relative to a nozzle to generate a control output pressure is provided with a squeeze film damper which utilizes the flapper, or an extension thereof, as the movable element of the squeeze film damper. Preferably the flapper is pivoted and forms with the nozzle exhaust passageway a tapered gap receiving a small portion of the nozzle flow which acts as the damping fluid. The majority of the nozzle flow passes through a hollow portion of the flapper located downstream of the nozzle.
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