MOTOR-DRIVEN HEADSTOCK FOR RIGHT TURBINE CONTROL VALVE Russian patent published in 2012 - IPC F01D17/00 

FIELD: power enegeneering.

SUBSTANCE: invention involves a motor-driven headstock for right turbine control valve, which includes casing with fulcrum bracket and bearing datum flange locating a slave cylinder with contralateral windows in front of a bracket, with a frame inside a slave cylinder, carried out in a form of two buckets, combined by two tension strips, arranged in such a manner, that the aperture between the strips has the same form as windows in the slave cylinder; such windows and a frame aperture is pierced by a lever, revolution axis of which goes through one out of two ends of a lever and is located on the bracket and the second end of the lever is resting upon the graded cam, connected to the operating mechanism. A plunger, resting upon the upper ramming piping of the frame, loaded with a recoil spring, the upper part of which is resting upon a tray, located on a stand, is situated in the centre of lever. The lower bucket is connected to the valve shaft, at that the friction surface of the casing is accomplished in a form of plugs, inner surface of which are characterized by the wear proof quality, while the surface of the frame buckets is accomplished in a form of plugs with the tear proof outer surface; bucket group gap width between the frame and the casing is greater, than the gap width between the piston and grand, besides, the slave cylinder, frame with buckets and tension strips are produced out of carbon construction steel, and the bearing datum flange - out of heat-resistant alloyed steel.

EFFECT: increased turbine valve operation management and reduced probability of emergency conditions occurrence within the power plants, alongside with repair costs reduction.

1 cl, 3 dwg