Turbine housing made of sheet metal

摘要

In the neighborhood area X of the tongue part 27 forming the winding end part of the scroll part 3, the wall part members 31 are provided on both the sides of the welding part (the facing part) ‘a’ of the first scroll part 5 and the second scroll part 7, wherein: the wall part members 31 encloses the welding part (the facing part) ‘a’ and forms the gas-tight space 33; and, the outer circumference wall which enclose the facing part and forms a gas-tight space configure a double-wall structure.

主权项

1. A turbine housing made of sheet metal comprising:
a scroll part forming a spiral exhaust gas passage, the scroll part including
a first scroll member anda second scroll member which faces and is bounded to the first scroll member,the first scroll member and the second scroll member being made of sheet metal; a first wall part member which is arranged on one side of a facing part of the first scroll member and the second scroll member, in a neighborhood area of a tongue part configuring a winding end part of the scroll part, so that the first wall part member connects an outer wall surface of the scroll part to an outer wall surface of a flow inlet part of exhaust gas, the first wall part member is a separate part from the first scroll member and the second scroll member; and a second wall part member which is arranged on another side of the facing part of the first scroll member and the second scroll member, in neighborhood area of the tongue part configuring the winding end part of the scroll part, so that the second wall part member connects the outer wall surface of the winding end part of the scroll part to the outer wall surface of the flow inlet part of the exhaust gas of the scroll part, the second wall part member is a separate part from the first scroll member and the second scroll member, wherein upper ends of the first wall part member and the second wall part member connect to the outer wall surfaces of the winding end part of the scroll part; lower ends of the first wall part member and the second wall part member connect to the outer wall surfaces of the flow inlet part of the scroll part; and front ends between the upper ends and the lower ends of both the first wall part member and the second wall part member are closed so as to enclose the facing part and form a gas-tight space closed to gas flow through the gas-tight space.