Screw Compressor
US10670015B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2015 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Sep 12, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2270/21
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A screw compressor includes a screw rotor, an electric motor for driving the screw rotor, bearings supporting the screw rotor and casings housing these members. The screw compressor also includes an oil feeding passage formed in the casing for feeding oil on a high pressure side to the bearings by a differential pressure between the high pressure side and a low pressure side and an oil feeding amount adjusting unit placed in a middle of the oil feeding passage, the oil feeding amount adjusting unit includes a cylinder, a valve element provided to reciprocate inside the cylinder, and plural flow paths provided in the valve element having different flow path areas, the plural flow paths are switched to adjust an oil feeding amount to be fed to the bearings by moving the valve element in accordance with the differential pressure between the high pressure side and the low pressure side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.