STEAM TURBINE OIL SYSTEM Russian patent published in 2004 - IPC

FIELD: mechanical engineering; steam turbines.

SUBSTANCE: proposed oil system contains oil tank, starting oil pump, pump-governor and injector. Injector nozzle is connected to pressure chambers of pump-governor and starting oil pump by common oil lines with non-return valves. Injector diffuser is connected by oil line to suction chamber of pump-governor. Novelty is that oil system is furnished with additional oil line with non-return valve by means of which nozzle is connected to chamber of pump-governor. Moreover, throttle diaphragm is installed on oil line delivering oil to nozzle. Throttle diaphragm is adjusted to provide oil pressure before nozzle under shut-down (starting conditions be lower than delivery pressure of starting oil pump. Oil pressure in oil line is lower than oil pressure in line when turbine operates.

EFFECT: increased oil pressure differential between oil lines under shut-down (starting) conditions across control and protection system elements of turbine.

2 dwg