Method for stopping a multi-stage hydraulic machine

Details Method for stopping a multi-stage hydraulic machine Method for stopping a multi-stage hydraulic machine

1984-04-13

1986-03-25

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Method of operation

415 29, 415500, F01D 2114, F03B 1310

Patent

active

045780170

ABSTRACT:
A method for stopping a multi-stage hydraulic machine with an inlet valve, guide vanes including highest and lowest stage guide vanes, and a return passage connected between flow passages of respective stages, wherein the machine is in turbine operation, including the steps of initiating the closing of the highest stage movable guide vanes firstly and the lowest stage movable guide vanes secondly and judging whether a closing relation between the highest and lowest stage vanes is normal or not in accordance with predetermined criteria after initiation of closing the lowest stage movable guide vanes. The method includes the steps of controlling the closing of the lowest stage movable guide vanes based on the judgement result, and the step of closing the inlet valve.

REFERENCES:
patent: 3275293 (1966-09-01), Hosogai et al.
patent: 4073594 (1978-02-01), Takagi et al.
patent: 4346304 (1982-08-01), Tsunoda et al.
patent: 4472104 (1984-09-01), Kuwabara
patent: 4474528 (1984-10-01), Yokoyama et al.
patent: 4475865 (1984-10-01), Sugishita et al.

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