Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1981-05-20
1984-10-09
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
60413, 91 5, 91450, 91461, 251 636, F16K 31122
Patent
active
044757107
ABSTRACT:
In an electro-hydraulic control assembly for turbine valves, including a shaft for the turbine valve, a valve housing, electrical control means, an electro-hydraulic converter connected to the electrical control means, a hydraulic control cylinder being connected to the electro-hydraulic converter, a control piston being movable in the cylinder in a valve opening and a valve closing direction and being connected to the valve shaft, a force storing spring loading the piston in the valve closing direction, and a hydraulic system including a hydraulic fluid reservoir, a fluid pump being fed from the 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, the improvement including a support structure disposed in the housing including two mutually parallel support plates, the spring being disposed between the support plates, the electro-hydraulic converter, the cylinder and the supply system being fastened to the support structure and being at least partially connected to each other by channels formed in the support plates.
REFERENCES:
patent: 2938346 (1960-05-01), Gratzmuller
patent: 3635020 (1972-01-01), Mahlmann
patent: 3724333 (1973-04-01), Fonden et al.
patent: 3913883 (1975-10-01), Irwin
patent: 4070831 (1978-01-01), Rutz
patent: 4085587 (1978-04-01), Garlinghouse
patent: 4135547 (1979-01-01), Akkerman et al.
patent: 4152970 (1979-05-01), Hall et al.
Greenberg Laurence A.
Kraftwerk Union Aktiengesellschaft
Lerner Herbert L.
Walton George L.
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