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1. (WO1991003624) TURBOCHARGER WITH TURBINE BACKPLATE AND CENTER HOUSING OIL SHIELD

Pub. No.:    WO/1991/003624    International Application No.:    PCT/US1990/002522
Publication Date: Mar 21, 1991 International Filing Date: May 7, 1990
IPC: F01D 25/12
F01D 25/14
Applicants: ALLIED-SIGNAL INC.
Inventors: GUTKNECHT, Daniel, Allen
HO, I-Chung
Title: TURBOCHARGER WITH TURBINE BACKPLATE AND CENTER HOUSING OIL SHIELD
Abstract:
A turbocharger includes a backplate (54) separate from both the center housing (12) and the turbine housing (22) which is clamped between the latter by tie bolts (74) extending across the center housing (12) so that the tensile/shear forces transmitted throughthe head of the tie bolt (74) are taken on the relatively cool compressor side of the center housing (12). The turbine backplate (54), since it is a separate member, may be made from a material having a relatively low thermal conductivity, thereby serving as a heat barrier between the turbine section and the center housing (12) of the turbocharger. The separate backplate (54) permits manufacture of the center housing (12) by an inexpensive die casting process. An oil splash shield (70) cooperates with the turbine backplate (54) to prevent oil from splashed against the warm parts of the assembly, and also cooperates with the turbine backplate (54) to define a chamber therebetween that also further increases thermal insulation of the center housing (12) from the relatively warm turbine housing (22).