Document Type and Number:
Japanese Patent JPS5126603
Kind Code:
B1
Abstract:
The assembly includes a watertight enclosure which protects critical motor parts, such as the bearings and windings, from the water. The rotatable drive shaft of the motor extends out of the enclosure through an opening for connection with a device to be driven, and means is provided to control leakage of water into the enclosure through the opening around the shaft. The leakage control means comprises a rotating shaft seal between the margin of the opening and the shaft. Above the seal is a sump, and a pump is located within the sump, the pump being driven by rotation of the motor shaft. A liquid, either lubricant or accumulated leakage, contained in the sump is forced by the pump in the direction of the seal, and the pressure in the sump developed by the pump prevents additional leakage through the seal. Further, the pump pressure may force some of the leakage accumulated in the sump out of the enclosure through the seal.
Application Number:
JP7098271A
Publication Date:
August 07, 1976
Filing Date:
September 14, 1971
Export Citation:
International Classes:
F04D3/02; F04D13/06; F04D29/06; F16J15/40; H02K5/132; (IPC1-7): H02K5/12; F16J15/54
Domestic Patent References:
| JP45041176A |