Vane-type rotary machine
US4515514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1982 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Aug 3, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2250/301
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A vane-type rotary machine for use as a compressor, pump or the like. The rotary machine has a cam ring with an inner peripheral contour expressed by an epitrochoid-like curve having at least one lobe, a cylindrical rotor having a plurality of vane grooves and contacting the inner peripheral surface of the cam ring, and vanes slidably received by the vane grooves and adapted to slide on the inner peripheral surface of the cam ring as the rotor rotates. The inner peripheral contour of the cam ring is corrected or modified in accordance with the amount of offset of the vanes in such a manner as to suppress the lateral reactional force applied to the vanes thereby to reduce the friction loss during sliding of the vanes in respective vane grooves, while making the sliding movement of the vanes approach a movement in accordance with a sine wave curve, thereby to diminish noise, thermal loss and mechanical damage which are attributable to irregularity of movement of the vanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.