A DEVICE FOR REMOTE ENGAGEMENT AND DISENGAGEMENT OF BARRING GEAR FOR TURNING THE TURBINE ROTOR SLOWLY DURING SHUTDOWN PRIOR TO STARTING THE TURBINE TO ENSURE EVENLY HEATING OR COOLING OF ROTOR

摘要

A device for remote engagement and disengagement of barring gear of steam turbine in which a manifold called as intermediate piece (2) connects the ports of servomotor with the solenoid valve (13). An intermediate piece is fixed in the location using 6 nos. M10 (3) screws with the servomotor. A gasket (1) is installed between the intermediate piece (2) and servomotor to avoid any oil leakage from the connection. Pipe union (4) is welded with intermediate piece at the supply port. Another pipe union (4) fastened with intermediate piece (2) at the threaded location. A solenoid valve (13) is installed with the servomotor using support plate (10). The support plate is fixed in its location at the servomotor top cover using plurality of M10 stud (7) and nut (8). A plurality of cylindrical pins (9) are used to locate the support plate with the servomotor cover when the solenoid valve (13) is fixed with the support plate using plurality of M6 screws (11) and nuts (12). The solenoid valve (13) is disposed to control the supply of oil to servomotor (14).