Patent ID: 8240043
Filing Date: 2012-08-14
Classification: F01D,Y02T,Y10T

Abstract:
1. A method of forming a windage cover for a rotary machine. the rotary machine having a cavity and at least one damping surface adjacent the cavity, the windage cover for covering at least one side of the cavity in the rotary machine, the windage cover having the form of a ring with at least two circumferentially extending segments that extend about an axis Am and engage a damping surface, each segment having a cross-sectional shape which includes a circumferentially extending base, the base having a first side which extends circumferentially about the base and at least one arm extending from the first side which is substantially perpendicular to the base, including the steps comprising: forming a continuous ring precursor that extends about an axis Am from a continuous sheet of annular material, the sheet of annular material extending about and in a direction perpendicular to the axis Am, the sheet having an inner diameter edge and an outer diameter edge, cutting the continuous ring precursor to form at least two arcuate segments of the windage cover; wherein stresses induced in the ring precursor by the process of forming the ring precursor cause each segment of the windage cover to have an inner flange having a greater radius of curvature with respect to the axis Am than the inner flange of the ring precursor and causes the flange of the segment of the windage cover to be angled more with respect to the axis Am than the flange of the ring precursor.