STEAM MACHINE ROTATIONAL SPEED CONTROL SYSTEM Russian patent published in 1999 - IPC

FIELD: steam machine rotational speed control systems. SUBSTANCE: system has two control loops; steam-and-hydraulic control loop and correcting electronic loop. Hydraulic signal of rotational speed is formed under action of pressure from oil pump connected with shaft of steam screw machine. This signal is furnished to sensitive element made in form of diaphragm which controls valve adjusting the pressure in cavity of steam servo cylinder. Servo-cylinder acts on two-seat valve cutting off flow of steam to steam screw machine. Electric signal of rotational speed is furnished to electronic regulator which generates signal for electrohydraulic converter which corrects pressure at sensitive element. EFFECT: reduction of losses of steam pressure of control member; increased power of machine. 2 cl, 1 dwg