Patent ID: 8939738
Filing Date: 2015-01-27
Classification: F04D,Y10T

Abstract:
1. A thrust shaft for a fan comprising: a shaft body having an enlarged disk adjacent one axial end to provide a rotating surface for a pair of thrust bearings; a first cylindrical portion extending from said disk in a first direction, and a second cylindrical portion extending from said disk in a second opposed direction, said second cylindrical portion having a hollow bore, and there being a plurality of holes extending through said second cylindrical portion to communicate an outer periphery of said second cylindrical portion with said hollow bore, with a ratio of a diameter of said hollow bore of said second cylindrical portion to a diameter of said plurality of holes being between 6.60 and 7.00; a ratio of an overall length of said second cylindrical portion, and a distance from a face of said enlarged disk to a center of said holes being between 14.4 and 15.2; said enlarged disk extending for an axial thickness, and a spacing distance being defined from said face to a center of said holes, with a ratio of said thickness to said spacing distance being between 0.82 and 0.92; and said diameter of said hollow bore being taken at an axial location aligned with said holes.