| 摘要 |
<p>Provided is a sheet-metal turbine housing 1 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 1 includes a member on a side of a bearing housing in which a bearing supporting a rotation shaft of a turbine rotor blade 50 is arranged; a member on a flow exhaust side which forms an outer side of the turbine rotor blade 50 in a direction of the turbine; and support columns 21, 40 which connect the member on the side of the bearing housing with the member on the flow exhaust side in an axial direction of the turbine and which are arranged at intervals on an outer circumferential side of the turbine rotor in a circumferential direction of the turbine rotor blade 50. Each of the support columns 21, 40 may have a cross-sectional shape in the axial direction of the turbine which includes an upstream corner and a downstream corner in a direction of a gas flow each of which has an acute angle, ¸1, ¸2 so that an upstream surface 32 and a downstream surface 34 incline along the gas flow.</p> |
