Patent ID: 6428277
Filing Date: 2002-08-06
Classification: F04D

Abstract:
An axial flow fan characterized by operating at high speed and low torque for producing airflow through an engine compartment of a vehicle comprising:a hub rotatable about an axis; an annular band concentric with the hub and spaced radially outward from the hub; a plurality of fan blades distributed circumferentially around the hub and extending radially from the hub to the annular band, wherein each blade has substantially the parameters defined by Blade SectionStaggerRadius/Tip Radius&xgr;Solidityr = R/RtipDegrees&sgr;38.5%76.00.52246.6%72.00.49052.7%71.50.47057.8%70.70.45263.0%71.10.43268.1%72.00.41073.3%72.90.38578.4%73.90.35983.6%74.40.33288.7%75.10.30293.9%76.70.267100.0%78.60.225whereinr is 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; is the stagger angle of the blade at the radial distance R, and &sgr; is the solidity C/S, with C being chord length and S being the circumferential blade spacing at the radial distance R.