公开(公告)号：WO1991003624A1

公开(公告)日：1991-03-21

申请号：PCT/US1990002522

申请日：1990-05-07

Applicant: ALLIED-SIGNAL INC.

Inventor： ALLIED-SIGNAL INC. ,  GUTKNECHT, Daniel, Allen ,  HO, I-Chung

IPC: F01D25/12

CPC classification number: F01D25/125 ,  F01D25/145 ,  F05D2220/40

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).