Nozzle and flapper with squeeze film damping

Details Nozzle and flapper with squeeze film damping Nozzle and flapper with squeeze film damping

1982-09-18

1985-01-08

Schwadron, Martin P.

Fluid handling

Pressure modulating relays or followers

13762562, F15B 500, F16F 934

Patent

active

044922450

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.

REFERENCES:
patent: 3221760 (1965-12-01), Buchanan
patent: 3323090 (1967-05-01), O'Brien
patent: 3882976 (1975-05-01), Nash

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