STEAM-TURBINE CONTROL GATE Russian patent published in 2006 - IPC F01D17/10 

FIELD: mechanical engineering; steam turbines.

SUBSTANCE: proposed gate has rotary disk installed in housing of shaft and bushings. Drive with servomotors connected to high and low pressure oil lines is secured on housing. Rods of servomotors are interconnected by lever. Novelty is that ends of bushings are made in form of truncated cones, and two mating conical bores are made diametrically opposite in disk. When assembling, ends of bushings get with clearance into disk bores. Optimum seat diameter of bushings is within 0.7-0.8 of diameter of gate housing. If sagging of shaft is not considerable, it is expedient to use graphite-based material reinforced by carbon fiber as gland packing. With spool moving upwards (downwards) from "middle" position (and subsequent return into initial position), servomotors rotate disk in clockwise (counter-clockwise) direction, respectively, thus increasing (decreasing) supply of steam to steam consumer.

EFFECT: improved reliability of steam gate.