Patent ID: 11933183
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 2:
3. A steam turbine valve drive device driving a steam turbine valve, the steam turbine valve drive device comprising:
a cylinder housing a piston disposed on an operating rod operating the steam turbine valve and having a load side oil chamber and an unload side oil chamber partitioned by the piston;
a bidirectional pump that selectively supplies hydraulic oil to the load side oil chamber and the unload side oil chamber;
a servomotor that drives the bidirectional pump;
a control unit that controls the servomotor;
an oil storage unit supplied with the hydraulic oil leaked from the bidirectional pump; and
a steam turbine valve abnormality monitoring system according to claim 1.