Vertical axis hermetic rotary helical screw compressor with improved rotary bearings and oil management
US4181474A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1978 |
| Grant date | Jan 1, 1980 |
| Priority date | — |
| Expiry date | Mar 2, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S417/902
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a vertical hermetic compressor, an inner cylindrical housing coaxially mounted within a sealed outer enclosure, sealably carries at its lower end, paired helical screw rotors defining with the inner housing a screw compressor compression chamber and supports coaxially with one of the screw rotors and constituting an axial extension thereof the compressor electrical drive motor by longitudinally spaced tapered roller bearings. Oil is bled from the sump and fed to the suction inlet tube to the compressor upstream of the working gas filter. Compressed working fluid is discharged axially downwardly with the lower tapered roller bearing assembly providing a minimal high pressure gap between the screw rotor ends and the stationary end plates. Entrained oil from the discharge passage which extends through the electric motor rotor seeks the suction side of the compressor through the upper of the two tapered roller bearing pack assemblies for controlled continuous lubrication of the upper bearing assembly. The compressed working fluid discharges axially through the center of the sealed outer enclosure at its upper end free of oil which is separated by impact with a curved plate deflector…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.