| 摘要 |
1, 060, 395. Hydraulic turbines and pumps. HITACHI Ltd. Sept. 27, 1963 [Oct. 2, 1962], No.38114/63. Headings F1C and F1T. When the circuit breaker 1 of a generator is actuated to open the circuit, water hammer in the suction pipe 5 of the turbine driving the generator, induced by the sudden change in load, is reduced by admitting compressed air into the suction pipe to prevent the occurrence of negative pressure downstream of the runner 4. For this purpose, a valve 2 arranged to open in response to actuation of the circuit breaker 1 admits compressed air from a reservoir 3 through pipes 6, 7 to the turbine. The invention is applicable also to pump-turbines and pumps. |
