Turbine housing for a turbocharger
AssigneeCummins Turbo Technologies Limited
InventorsJohn Martin Allport, Georgina Chiu, Clive Robert Martin
Life of this patent
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Abstract
A turbine housing (13) for a radial flow turbine, particularly a turbine used in an exhaust gas turbocharger. The housing has a general volute shape with a substantially annular part extending around the turbine axis and an inlet duct (20) extending therefrom. The inlet duct (20) has a first wall facing part of the outer surface of the annular part of the housing, a pair of spaced webs (44) extending from the outer surface of the circular part of the housing to the first wall, the webs defining a valley (45) therebetween. The arrangement renders the housing stiffer and less prone to fatigue cracking.
Claims24
A turbine housing for a radial flow turbine having an axis of rotation, the housing comprising a casting have a generally volute shape with a substantially annular part extending around the axis and an inlet duct extending therefrom, the inlet duct having a first wall facing part of an outer surface of the annular part of the housing, at least two spaced apart webs, each web extending from a portion of the outer surface of the substantially annular part of the housing to the first wall, the webs defining a valley therebetween.
A method for casting a turbine housing comprising the steps of providing a casting die defining an aperture into which molten material is poured, the die being shaped to form a turbine housing having a generally volute shape with a substantially annular portion and an inlet duct extending approximately tangentially therefrom, the die having a first surface for defining a first wall of the inlet duct and a second surface for defining an adjacent arcuate surface of the substantially annular portion of the housing that faces the first wall of the inlet duct, including configuring the die so as to have at least two spaced apart channels extending between the first and second surfaces that provide spaced apart flow paths, introducing molten material into the die through the die aperture and allowing a portion of the material to flow along the channels, allowing the material to solidify and then ejecting the solidified material from the die.
Dependencies are inferred from the claim text.