Induction motor ventilated heat shield for bearings
US8736122B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2009 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Dec 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dynamoelectric machine, such as a totally enclosed fan cooled (TEFC) induction motor has a double-wall bearing housing heat shield that envelops and thermally isolates the bearing housing from the rest of the motor housing interior. The shield defines an air channel between the shield outer and inner walls. Optionally the air channel may be constructed to enable circulating air flow through a shield intake in communication with an air flow source, such as air ducted from the TEFC motor axial cooling fan. The air channel also defines an exhaust. Air flow within the air channel transfers heat out of the motor housing, lowering bearing housing operating temperature. Air flow rate may be varied in response to motor operational parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.