Patent ID: 9194292
Filing Date: 2015-11-24
Classification: F01D,F02C,F05D

Abstract:
1. A sheet-metal turbine housing in which a scroll part is formed by joining opposing scroll members made of sheet metal to form a spiral-shaped exhaust gas passage therein, the sheet-metal turbine housing comprising: a center core part which has approximately a cylindrical shape and which includes: wherein the center core part is formed from the bearing housing portion, the passage outlet portion, and the plurality of support columns as a single integral structure by cutting work, wherein each of the support columns has a cross-sectional shape of substantially quadrilateral formed by an inner arc, an outer arc, an upstream surface, and a downstream surface, wherein an upstream corner which is at a crossing of the outer arc and the upstream surface has an acute angle, wherein a downstream corner which is at a crossing of the inner arc and the downstream surface has an acute angle, and wherein each of the upstream surface and the downstream surface of the support column is configured flat and inclines from an outer periphery side of the scroll part toward an inner periphery side of the scroll part along a downstream direction of a gas flow.