STEAM TURBINE PLANT OIL SUPPLY SYSTEM Russian patent published in 1997 - IPC

FIELD: power engineering; steam turbine installations. SUBSTANCE: oil supply system has oil tank three main oil pumps for delivering oil to consumers, non-return valves, header uniting pressure oil lines of pumps behind non-return valves, oil coolers and oil distributor with spool, bushing with ports, spring, plates and covers. Part of oil consumers is connected to outlet of oil coolers before oil distributor. Spool has coaxial trunnions at both ends, one of which is made stepped, and the other is provided with thrust flange. Bushing and cover have stepped holes accommodating spool trunnions. Spring-loaded plate is installed on second trunnion of spool. Part of ports in bushing is made with displacement along axis. End face and circular chambers are placed in communication in pairs with pressure oil lines of pumps before non-return valves and also with header. Plate can be furnished with guide bushing for fitting on spool trunnion. First trunnion can be installed for sliding on spool in radial direction and is connected with spool by mechanical tie. EFFECT: improved reliability of oil supply. 3 cl, 1 dwg