Hydraulic machine shaft seal with centrifugal removal of sand and soil particles
US4529209A · kind A · utility
8Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1983 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Jun 6, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/93
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotary shaft of a hydraulic machine has a collar projecting radially outwardly therefrom. The rotary shaft and the collar are encased by a casing which carries a seal ring to be pressed against an axial end surface of the collar to form a fluid-tight seal therebetween. The axial end surface of the collar slidingly contacting with the seal ring is provided with a plurality of radial grooves extending from the central portion of the collar to the outer peripheral edge thereof. As the rotary shaft rotates at a high speed, a centrifugal force is generated to separate sand and soil particles from the water within the radial grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.