Starting of pumps or turbopumps
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 20, 1981
Grant Date -
N/A
app pub date -
Oct 19, 1979
filing date -
Oct 20, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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