Gear pump with a valve arranged between a suction side and a pressure side of the gear pump
US8038422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2007 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Jun 30, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C14/26
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Gearwheel pump, having a housing with at least two intermeshing gears with shafts supported by slide bearings lubricated with pumping medium (M) fed from a suction side to a pressure side, a return duct which leads pumping medium which flows outward through the plain bearing back to the suction side, and a valve (5) having a stationary part and a moveable part (20, 21). The valve (5) has a setting characteristic which runs, as a first approximation, linearly at least in one region, wherein the setting characteristic is defined by a differential pressure (Δp) across the valve as a function of a setting path (x) in the valve (5) thereby significantly improving capability for setting the pressure in the transition region between the plain bearing and a dynamic seal of a driveshaft which is guided outward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.