Actuator for a valve, in particular a turbine valve

Details Actuator for a valve, in particular a turbine valve Actuator for a valve, in particular a turbine valve

2005-07-12

2005-07-12

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

C251S067000

Reexamination Certificate

active

06915632

ABSTRACT:
An actuator includes a valve spindle, for adjustment of an opening position for a valve and a drive piece for the valve spindle. The drive piece is connected to the valve spindle, by a storage device, which may be pre-tensioned to a particular pre-tensioned value during a pre-tension process, in such a manner that, with a pre-tensioned storage device the opening position can be set without altering the value of the pre-tensioning. The actuator is particularly suitable for a valve on a steam turbine or a gas turbine. As an example, the actuator may be a hydraulic damping unit, integrated in a damping piston. The damping unit permits a reliable end-travel damping for the valve, in particular in the case of rapid closure.

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patent: WO 9531661 (1995-11-01), None
patent: WO 98/13633 (1998-04-01), None

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