Roller gerotor device and pressure balancing arrangement therefor
US5466137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1994 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Sep 15, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C15/0023
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A roller gerotor device is disclosed including an outer rotor (39) and an inner rotor (31), and a plurality of rollers (37) serving as teeth. The device includes a housing means (11,45,47) defining a first wear surface (67) disposed axially adjacent first axial end surfaces (55,63) of the rotors. The first wear surface cooperates with one of the rotors to define an annular fluid passage (83) and a plurality of fluid grooves communicating with the passage (83) and extending radially outward. At least a terminal portion of each of the grooves (87) is adjacent an axial end surface (59) of each roller member (37) as the rotors rotate. Each of the terminal portions (95) becomes progressively shallower in the direction of rotation of the rotors, thus building up fluid pressure in the fluid groove (87) to prevent gouging or galling of the roller end surface against the adjacent wear surface (67).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.