Starting of pumps or turbopumps

Details Starting of pumps or turbopumps Starting of pumps or turbopumps

1979-10-19

1981-10-20

Casaregola, Louis J.

Rotary kinetic fluid motors or pumps

Method of operation

415500, F03B 310

Patent

active

042957826

ABSTRACT:
Method of starting pumps, in particular a method of starting turbopumps functioning as pumps, the said pumps or turbopumps being of the type with a fixed distributor-diffuser, and in which the curve of variation of the power at working speed as a function of the flow of fluid passes through a minimum which is between the zero-flow point and the nominal-flow point.
In conformance with the invention, the method is characterized by a sequence consisting of putting in rotation, at a lower speed than the nominal speed, the pump-motor, the guard valve or valves being closed; when the pressures either side of the guard valve or valves have reached a differential value which is either zero or sufficiently low for its/their opening to be effectible without risk of damage, of opening these or this to such an extent that it/they allow, when the unit approaches its nominal speed, the flow corresponding to the said minimum and finally of progressively opening the guard valve or valves until it/they allow the nominal flow to pass.

REFERENCES:
patent: 3309057 (1967-03-01), Tonooka
patent: 3682563 (1972-08-01), Takashima
patent: 4014624 (1977-03-01), Takase et al.
patent: 4073594 (1978-02-01), Takagi et al.
patent: 4158525 (1979-06-01), Kawase et al.

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