Rotary kinetic fluid motors or pumps – Method of operation
Patent
1983-02-04
1984-09-18
Marcus, Stephen
Rotary kinetic fluid motors or pumps
Method of operation
415 14, 415500, F03B 1504
Patent
active
044721048
ABSTRACT:
An operation control method for a multistage regulated hydraulic machine wherein channels of the stages from the lower pressure side to the higher pressure side are successively communicated with each other through return guides and at least two said stages are provided with respective guide vanes capable of having their degrees of opening controlled in synchronism with each other. The method includes the steps of: sensing that guide vanes of one of the stages becomes uncontrollable when the operation of opening and closing the guide vanes capable of having their degrees of opening controlled is performed while the degrees of opening of the guide vanes capable of having the degrees of opening thereof are controlled, and effecting control of the degrees of opening of the guide vanes of the other stages based on a signal issued in accordance with the result of sensing so as to keep the degree of opening of the guide vanes that have become uncontrollable and the degrees of opening of the guide vanes of the other stages in a predetermined relation of allowable opening degrees.
REFERENCES:
patent: 3275293 (1966-09-01), Hosogai et al.
patent: 4073594 (1978-02-01), Takagi
patent: 4346304 (1982-08-01), Tsunoda et al.
Beall, Jr. Thomas E.
Bowman Brian J.
Hitachi , Ltd.
Marcus Stephen
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