US 11,754,088 B2
Fan impeller with thin blades
Craig M. Beers, Wethersfield, CT (US); and John Perella, Monson, MA (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Dec. 3, 2021, as Appl. No. 17/541,369.
Prior Publication US 2023/0175521 A1, Jun. 8, 2023
Int. Cl. F04D 29/28 (2006.01); F04D 29/30 (2006.01); F04D 29/54 (2006.01); F04D 29/24 (2006.01); B64D 13/00 (2006.01); F04D 3/02 (2006.01); B64D 13/06 (2006.01)
CPC F04D 29/281 (2013.01) [B64D 13/00 (2013.01); F04D 3/02 (2013.01); F04D 29/24 (2013.01); F04D 29/242 (2013.01); F04D 29/245 (2013.01); F04D 29/28 (2013.01); F04D 29/30 (2013.01); F04D 29/544 (2013.01); B64D 2013/0688 (2013.01); F05D 2240/304 (2013.01); F05D 2250/74 (2013.01); F05D 2300/173 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An impeller for use in a fan system comprising:
a hub extending along an X axis of rotation and having a hub outer surface;
a dimension X measured along the X axis of rotation defining a centerline, a radial dimension Z defining a Z axis in the radial dimension Z, and a Y axis defined laterally and perpendicular to the Z axis, and spaced by 90 degrees from the Z axis,
further comprising nine blades extending radially outwardly of the hub outer surface, and having a first cross-sectional contour and height at the hub outer surface as defined below, having a dimension Xs measured in the X direction and perpendicular to the Y axis and to a suction side and a dimension Xp measured in the X direction and perpendicular to the Y axis and to a pressure side and a dimension Yp measured in the Y direction perpendicular to the X axis and to a pressure side and a dimension Ys measured in the Y direction and perpendicular to the X axis to the suction side and a dimension Zp in the Z dimension in the radial dimension from the centerline to the pressure side and a dimension Zs measured in the Z direction and to the suction side, with there being an origin for each of the nine blades, and all said origins being at a common location along the X axis, and at nine equally circumferentially spaced locations, with a point A defined at a leading edge, a point B being the closest point to the Y axis, and spaced from the leading edge, a point C being the closest point to the X axis, and spaced from the leading edge, and a point D being at a trailing edge, and having the following dimensions:
 
 
 
 Point No. XP YP ZP
 
 
 
 A 0.3365 −0.0643 0.9889
 
 B 0.3568 −0.5000 0.9945
 
 C 0.3732 −0.0489 1.0013
 
 D 2.5986 −2.2174 1.2400
 
 
 
 
 
 Point No. XS YS ZS
 
 
 
 A 0.3365 −0.0643 0.9889
 
 B 0.3274 −0.0878 0.9903
 
 C 0.3298 −0.1047 0.9951
 
 D 2.5986 −2.2174 1.2400
 
 
further, there being a second cross-sectional contour spaced from the hub outer surface in a radially outer direction having the following dimensions:
 
 
 
 Point No. XP YP ZP
 
 
 
 A 0.2792 −0.0541 1.3143
 
 B 0.2960 −0.0415 1.3262
 
 C 0.3098 −0.0399 1.3358
 
 D 2.3186 −2.1718 1.6250
 
 
 
 
 
 Point No. XS YS ZS
 
 
 
 A 0.2792 −0.0541 1.3143
 
 B 0.2713 −0.0756 1.3078
 
 C 0.2733 −0.0921 1.3081
 
 D 2.3186 −2.1718 1.6250
 
 
all of the dimensions measured above having a tolerance in the range of +/−0.020 inch (+/0.0508 cm).