TURBINE HOUSING

摘要

Provided is a sheet-metal turbine housing (1) formed by joining opposing scroll members in which a scroll part forming a spiral-shaped exhaust gas passage is made of sheet metal, wherein a plurality of support columns (21, 40) are provided at intervals in the circumferential direction at the outer circumference side of a turbine rotor vane; the support columns (21, 40) link in the turbine axial direction a member near a bearing housing (1), in which a bearing that supports the rotation shaft of the turbine rotor vane (50) is provided, to a member near a flow passage outlet which forms the outside of the turbine rotor vane (50). Preferably, a bearing housing part (15), in which the bearing that supports the rotation shaft of the turbine rotor vane (50) is provided, is linked to a flow passage outlet part (17), which forms the outside of the turbine rotor vane (50), by the plurality of support columns (21) provided in the circumferential direction at the outer circumference side of the turbine rotor vane (50), the angles of an upstream-side angled part and a downstream-side angled part in a cross section of each of the support columns (21) viewed in the turbine axial direction are formed to respectively be acute angles ?1 and ?2, and an upstream-side surface (32) and a downstream-side surface (34) are inclined in accordance with the flow of gas.