Patent ID: 8347500
Filing Date: 2013-01-08
Classification: F01D,F05B,F05D,Y10T

Abstract:
1. A method for assembly of a gas turbine engine mid turbine frame (MTF), the method comprising the steps of: a) inserting an annular inner case within an annular interturbine duct (ITD), the ITD having at least three hollow struts radially extending between outer and inner duct walls, the struts cooperating with corresponding openings in the walls to provide radial passages through the ITD, the duct walls providing at least a portion of an engine gas path between turbine stages of the engine; b) inserting a load transfer spoke radially into each of the ITD hollow struts until one end of the spoke extends radially inwardly of the ITD inner duct wall and the other end extends radially outwardly of the ITD outer duct wall; c) connecting the inner end of the load transfer spokes each to the inner case; d) inserting the inner case, ITD and spokes within an outer case so that the outer case surrounds the outer ends of the spokes, the outer case configured for mounting to the engine to provide a portion of an outer casing of the engine; and e) connecting the outer end of the load transfer spokes to the outer case.