High efficiency and low weight axial flow fan
US6368061B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | May 4, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/05
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fan includes a hub rotatable about an axis; an annular band concentric with the hub and spaced radially outward from the hub; seven fan blades distributed circumferentially around the hub and extending radially from the hub to the annular band. Each blade has specific parameters defined by:r, the non-dimensional radius from the rotational axis (r=R/Rtip with R being the radius from the rotational axis and Rtip being the radius from the rotational axis at the blade tip),&xgr;, the stagger angle of the blade at the radial distance r,&thgr;, the camber angle of the blade at the radial distance r,&sgr;, the solidity C/S, with C being chord length and S being the circumferential blade spacing at the radial distance r,c, the non-dimensional chord length (C/Rtip) of the blade at the radial distance r,t, the non-dimensional thickness (T/C where T is the actual thickness at R) of the blade at radius r,&Lgr;, the skew angle of the blade at the radial distance r calculated at 30% chord where the skew at the hub radius is defined as zero skew, anddH/dR, the slope of the dihedral measured at r.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.