Rotary machine
US8928195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2011 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Oct 12, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/227
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
On an inner circumference side of a stator fixed in an inner housing, a rotor is arranged. The rotor rotates through a bearing with respect to a center shaft that is a stationary shaft fixed to outer housings. Oil introduced into a rotor oil inlet path in the center shaft flows through a communication path and a clearance on an outer circumference of the center shaft into an oil path in the rotor. The oil flowing through the oil path cools a permanent magnet, lubricates the bearing, and is discharged from a rotor oil discharge port to the outside of the inner housing. The oil in the clearance is sealed with a thread seal, i.e., an inner thread formed in an inner face of an end ring and is prevented from flowing toward the bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.