Filtering device for a canned motor
US5234316A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | May 7, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A canned motor has a housing and a motor shaft which extends through the housing. A rotor is fixed to the shaft and is located in a rotor compartment within the housing. The rotor compartment has a flow path for circulation of a cooling and lubricating fluid through the compartment. A sleeve surrounds the shaft upstream of the flow path and is surrounded by a second sleeve. The two sleeves cooperate to define a gap which serves as a filter for fluid entering the rotor compartment. The minimum height of the gap is smaller than the minimum height of the flow path to prevent suspended solid particles which can obstruct the flow path from entering the latter. The sleeves are composed of a hard material so that oversized particles can be ground down by causing the fluid to repeatedly bring the particles into contact with the sleeves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.