STEAM TURBINE PROTECTION DEVICE Russian patent published in 2001 - IPC

FIELD: mechanical engineering; protection of steam turbine with direct contact condenser. SUBSTANCE: device has stop valve and turbine parameters maximum deviation protective elements. Drive 15 of stop valve 14 is connected in series with high-pressure oil source along oil line 60 through interpiston spaces 42 and 13. Device has vacuum break spring-loaded normally open valve 6 connected through seat 54 with plate 53 to steam space of condenser and to ambient atmosphere. Device also has float-type condensate level relay 11 in condenser 1 with control spool 18 and pulse spool 19. Interpiston space 23 of control spool 18 is first connected in direction of oil flow from high-pressure oil source to drive 15 of stop valve 14. Interpiston space 23 is also connected to drive of vacuum break valve. Interpiston space 23 is connected to oil tank of turbine through interpiston space 29 of pulse spool 19. End face chamber 24 and interpiston space 23 are connected by oil line 65 and connected through interpiston space 30 to high-pressure oil source and to turbine oil tank. By electric signal electromagnet 31 disconnects drive 14 from turbine oil tank and bypasses oil supply from high-pressure oil source to it. EFFECT: enhanced reliability of protection of steam turbine. 1 dwg