Pump with seal cooling means
US5088891A · kind A · utility
4Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Apr 25, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D7/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump for high temperature liquid includes a duct interconnecting the suction inlet space, and the annular clearance space between the shaft and the pressure housing at a point immediately adjacent to the seal around the shaft. During hot stand-by uniform thermosyphon circulation of liquid occurs from the suction inlet space through the annular clearance space and back to the suction inlet via the duct, which helps prevent thermal stresses being set up in the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.