Air cycle machine with seal shaft,申请号US201313755066-传众专利搜索

Air cycle machine with seal shaft

申请公布号：US9470104(B2)

申请号：US201313755066

申请日期：2013.01.31

申请公布日期：2016.10.18

申请人：

Hamilton Sundstrand Corporation

发明人：Vignali Mark;Pragluski Robert M.

分类号：F04D29/10;F01D11/02;F16J15/447

主分类号：F04D29/10

代理机构：

Carlson, Gaskey & Olds, PC

代理人：Carlson, Gaskey & Olds, PC

地址：Windsor Locks CT US

摘要：A seal shaft for use in an air cycle machine has two axial edges. An axial distance is measured between contact faces at the axial edges, with a tolerance to the dimension. A greatest variation between the axial distance at a plurality of spaced locations on the edge face is maintained with a ratio of the greatest variation to the tolerance being less than 0.2. A rotor assembly, an air cycle machine and a method are also disclosed.

主权项：1. A seal shaft for use in an air cycle machine comprising: a body centered on a central axis, said body defining an inner bore and an outer surface including radially outwardly extending ledges at each of two axial edges, and a radially inner surface at an outer peripheral surface, with radially outwardly extending feature axially spaced on an opposed side of said radially inner surface relative to said outwardly extending ledges and a plurality of air holes extending from said outer peripheral surface to said inner bore; an axial distance measured between contact faces on said axial edges, a tolerance to said axial distance, and a greatest variation maintained between said axial distance at a plurality of spaced locations on said contact faces, with a ratio of said greatest variation to said tolerance being less than 0.2; and wherein said axial distance is 0.770 in (1.95 cm), said tolerance is 0.002 in (0.005 cm) and said greatest variation is 0.0003 in (0.762 cm).