Centrifugal compressor impeller with nonlinear backwall
US11408434B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 2019 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Jan 17, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2250/71
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A centrifugal compressor impeller includes a plurality of blades on a front side that extend from a first axial side to an outer radial end of the impeller. The centrifugal impeller includes a back side having a nonlinear backwall. The backwall can include a flat area hear a bore of impeller, a flat area near a tip of the impeller, and a convex surface between the flat areas of the bore and the tip. In some forms the impeller further includes a concave surface between the convex surface and the tip to form an s-shape. A transition or inflection point can denote the change from convex to concave. The convex and/or concave surfaces can take any variety of forms such as constant radius sections and/or compound curves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.