Spherical sleeve and bushing bearing for centrifugal pump stage
US9845808B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2014 |
| Grant date | Dec 19, 2017 |
| Priority date | — |
| Expiry date | Jan 30, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D1/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A centrifugal pump has a number of stages, each of the stages having an impeller and a diffuser. The impellers are mounted to the pump drive shaft for rotation. A bearing in at least one of the stages includes a sleeve coupled to the drive shaft for rotation. The sleeve has upper and lower ends and an outer side wall facing radially outward that is convex and spherical. A bushing is mounted in the diffuser and has a bore with an inner side wall facing radially inward that is concave and spherical. A pair of slots is formed in the inner side wall of the bushing 180 degrees apart from each other and extending axially. The slots enable the sleeve to be inserted into the bore with the sleeve axis and bore axis perpendicular to each other, then tilted 90 degrees to coincide the sleeve axis with the bore axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.