Rotary pump for conveying a fluid
US11933321B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2021 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Dec 30, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/406
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotary pump includes a balance drum connected to a pump shaft between a hydraulic unit and the pump shaft, an axial relief passage between a balance drum and a stationary part stationary relative to a pump housing, and a balancing device arranged between the balance drum and the hydraulic unit, the balancing device including a ring-shaped rotary part connected to the pump shaft, and a ring-shaped non-rotary part movable only in the axial direction, the rotary part having an axial face facing the hydraulic unit, the rotary part and the non-rotary part overlap in a radial direction, which is perpendicular to the axial direction, and the non-rotary part movable in the axial direction such that a radial relief passage is open during operation of the pump, with the radial relief passage extending in the radial direction between the rotary part and the non-rotary part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.