AUTOMATIC SPEED GOVERNING SYSTEM OF STEAM TURBINE Russian patent published in 1998 - IPC

FIELD: steam-turbine speed control by means of supervising speed control unit. SUBSTANCE: supervising speed control unit incorporates electronic speed governor and steam-mechanical speed governor. High-pressure source of this system is pump 19 coupled with shaft of turbine 1. Throttle 23 is installed in upstream channel. Intermediate assembly is made in the form of diaphragm 8 whose other space communicates with channel part upstream of throttle 23 and its first part communicates with pressure-reducing valve and with channel part downstream of throttle 23 through additional nozzle. First space accommodates two coaxially arranged springs 28 and 29. Valve gear is directly connected to inlet line. EFFECT: improved reliability and accuracy of speed governing, simplified design. 3 cl, 1 dwg