turbine housing for a radial flow turbine, turbocharger turbine, and method for shaping a turbine housing

摘要

TURBINE ACCOMMODATION FOR A RADIAL FLOW TURBINE, TURBINE, TURBOCARGER, AND METHOD FOR MOLDING A TURBINE ACCOMMODATION. A turbine housing (13) is described for a radial flow turbine, particularly a turbine used in an exhaust gas turbocharger. The housing has a general shape of a volute with a substantially annular portion extending around the geometrical axis. of the turbine and an inlet duct (20) extending therefrom. The inlet duct (20) has a first wall facing the outer surface part of the annular part of the housing, a pair of spaced membranes (44) extending from the outer surface of the circular part of the housing to the first wall, the membranes defining a valley (45) between them. The arrangement makes the housing more rigid and less prone to fatigue cracking.