Electro-hydraulic control actuator for turbine valves

Details Electro-hydraulic control actuator for turbine valves Electro-hydraulic control actuator for turbine valves

1984-02-15

1985-02-19

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 30, 60404, F16K 31122

Patent

active

045000662

ABSTRACT:
Electro-hydraulic control assembly for turbine valves, including electric control means, a shaft connected to a turbine valve, a valve housing and an integrated compact actuator unit disposed in the housing, the actuator unit including an electro-hydraulic converter connected to the electric control means, a hydraulic control cylinder being connected to the electro-hydraulic converter and having a control piston connected to the shaft, and a hydraulic supply system, the supply system including a fluid reservoir, a fluid pump being fed from the fluid reservoir and having a pressure side, an electric motor for driving the pump, and a hydraulic pressure accumulator connected to the pressure side of the pump.

REFERENCES:
patent: 3536431 (1970-10-01), Lindquist
patent: 3682436 (1972-08-01), Legille
patent: 4054155 (1977-10-01), Hill
patent: 4190130 (1980-02-01), Beck
Pp. 37 and 39 of the "Siemens Zeitschrift 52".

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