Starting of pumps or turbopumps
US4295782A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1979 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Oct 19, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S415/91
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.