Slotted rotor lubrication system
US5007808A · kind A · utility
10Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Dec 15, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C29/023
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hermetic vertical shaft compressor for refrigeration or air conditioning uses a single-stage centrifugal pump formed in the rotor assembly to lubricate bearing surfaces. Oil is picked up from a sump at the base of the rotor, and is thrown into an annulus in the rotor. From here the oil proceeds up axial slots formed in the rotor laminations to an upper annulus, where it feeds lubrication channels in the upper bearing. The shaft has a reduced diameter thereby reducing material costs and reducing hystersis and eddy current losses, while achieving increased pumping capacity and pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.