Blade and axial flow impeller using same
US11572890B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 24, 2019 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Sep 24, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/304
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present application discloses a blade, comprising a blade tip, a blade root, a leading edge, and a trailing edge, wherein the leading edge and the trailing edge each extend from the blade tip to the blade root; the blade may rotate around a rotation axis, and the rotation axis and a normal plane of the rotation axis perpendicularly intersect at the foot of the perpendicular; a projection of the leading edge on the normal plane along the rotation axis is a first curve, and the first curve has an even number of inflection points. The blade of the present application can reduce noise and improve aerodynamic performance when the blade rotates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.