Electric motor with cooling device
US5589720A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Apr 28, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/197
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an electric motor the shaft projects beyond the bearing on the closed-end and has a central bore running from this side to close to the drive-end bearing. Centrally in the bore is secured a tube which either extends to close to the end of the bore or is secured in a blind hole in the end of the bore. The tube has a lateral bore in the region of the base of the bore. At the end of the shaft near the closed-end bearing outside the motor housing, a device is secured to the end-plate via which water, used as a coolant, passes into the tube and flows back via the space between the tube and the bore. The tube is held centrally in the bore by two discs, having axial holes, slid over the tube. This construction makes it possible to conduct the heat dissipated in the rotor winding and the rotor, which is transmitted to the shaft, away in the best possible way.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.