Patent Number: 6,250,887

Title: Reversible pump-turbine system

Abstract: A reversible pump-turbine system having a discharge adjustment device such as guide vanes, which make it possible to safely stop a pump turbine at the time of emergency shutdown in a generating mode by performing a close operation using an inlet valve even if abnormality has occurred with the guide vanes, without causing abnormal water hammer. Also, at the time of pump mode emergency shutdown, reverse rotation can be prevented even if abnormality occurs in the guide vanes, and it is possible to achieve a safe stop while reducing the loads/stresses to the reversible pump-turbine.

Inventors: Kuwabara; Takao (Hitachi, JP), Harada; Masataka (Tokyo, JP)

Assignee: Hitachi, Ltd.

International Classification: F03B 15/18 (20060101); F03B 15/00 (20060101); F04B 049/00 ()

Expiration Date: 06/26/2018