STEAM-ADMISSION CONTROL VALVE CHEST FOR STEAM TURBINE CYLINDER

摘要

FIELD: nozzle-type steam distribution for steam turbines. SUBSTANCE: valve chest has two separators 5, 6, each controlling two valves due to direct coupling between rod 9 of each separator and rod 7 of one valve 1 of pair and couping through transmission system (leverage 11), between the former and rod 10 of other valve 3 of pair. End play is provided in transmission line between each servomotor and second valve, for example, in the form of clearance "e" between rod 9 of servomotor and plunger joined with leverage 11. Clearance "e" equals sum of stroke of valve 1 for effective opening and its additional stroke for time within which second (next operating) valve 2 of chest opens through distance of its effective stroke, whereupon rod 9 of servomotor 5 is stopped on its top end by plunger 14 which starts actuating second valve 3 coupled with this servomotor through leverage 11. EFFECT: improved design. 2 cl, 1 dwg