Multistage centrifugal pump with integral abrasion-resistant axial thrust bearings
US10280929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2013 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Jan 4, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/445
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A multistage centrifugal pump includes a housing, a rotatable shaft and first and second turbomachinery stages. The first turbomachinery stage includes a first diffuser connected to the housing, a first impeller connected to the rotatable shaft. The second turbomachinery stage includes a second diffuser connected to the housing and a second impeller connected to the rotatable shaft. The multistage centrifugal pump further includes an integral axial load and bearing system that includes at least one diffuser bushing and at least one impeller bearing. The integral axial load and bearing system permits the independent axial movement of the first and second impellers. The integral axial load and bearing system also provides an opposite force to up-thrust and down-thrust produced by the first and second turbomachinery stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.