Patent ID: 6358001
Filing Date: 2002-03-19
Classification: F01D

Abstract:
An annular turbine frame comprising:a first ring disposed coaxially about an axial centerline axis and having a plurality of circumferentially spaced apart first ports; a plurality of circumferentially spaced apart struts joined radially to said first ring by a corresponding plurality of collars, each strut having radially opposite first and second ends, and a through channel extending therebetween; each of said collars being disposed between a respective one of said strut first ends and said first ring in alignment with a respective one of said first ports for removably joining said struts to said first ring; and each of said collars comprising: a base disposed against said first ring and having a plurality of collar mounting holes for receiving mounting bolts therethrough to removably join each said base to said first ring, each said base having a central aperture aligned with a respective one of said first ports; each collar mounting hole has a hole counterbore through a radially outer portion of said collar mounting hole; a radially inner portion of each said collar mounting hole is threaded to receive and hold a threaded insert; the threaded hollow insert includes inner and outer threaded surfaces; a washer is disposed in each said respective hole counterbore; and the mounting bolts are respectively disposed through first ring holes disposed through said first ring and said washers, and screwed into said threaded inner threaded surfaces of said respective inserts.