Method of controlling the operation of a pump in a pumping insta

Details Method of controlling the operation of a pump in a pumping insta Method of controlling the operation of a pump in a pumping insta

1989-11-27

1992-02-25

Bertsch, Richard A.

Pumps

Processes

417 22, 417 45, F04B 4900

Patent

active

050908723

ABSTRACT:
A method of detecting a counterflow in a pump comprises providing with detecting means for detecting variations in the discharge pressure of the pump and signal analyzing means for analyzing oscillation components contained in an output signal from the pressure detecting means, and detecting the pump's operating point to have entered a counterflow characteristic operation region when a waveform of the detection signal generated in association with the variations in the discharge pressure of the pump exhibits a predetermined spectrum distribution. Further, when it is detected that the operating point enters a counterflow characteristic operation region, the escape from that region is performed by temporally throttling the guide vane and temporally increasing the rotating speed.

REFERENCES:
patent: 4253794 (1981-03-01), Kuwabara
patent: 4708594 (1987-11-01), Shinmei et al.

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