Compressor shaft collar through port for pressure equalization between fluid pockets
US4877381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | May 12, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/42
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A scroll-type hermetic compressor is disclosed including within a hermetically sealed housing a fixed scroll member, an orbiting scroll member, a main bearing frame member, and a crankshaft. The frame member and fixed scroll member define a suction pressure chamber in which the orbiting scroll member is disposed. The crankshaft includes a plate portion disposed between the orbiting scroll member and a thrust surface of the frame. Oil chambers are disposed within respective interfaces between the orbiting scroll member bottom surface and the plate portion top surface, and the plate portion bottom surface and the frame thrust surface. Oil at discharge pressure from an oil sump is supplied to the oil chambers. The oil chambers communicate with one another via a pressure equalization port extending through the plate portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.