Exhaust-gas turbine

US6669441B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Karl-Heinz Bertnik · Bopfingen, DE
• Volker Doring · Stuttgart, DE
• Hans-Dieter Hensel · Leinfelden, DE
• Peter Schick · Eßlingen, DE

Key dates

• Filing date: Jun 8, 2001
• Grant date: Dec 30, 2003
• Expiry date: Jun 8, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An exhaust-gas turbine for a turbocharger includes a rotor mounted rotatably in a turbine casing having a spiral inlet duct which is followed by an annular space surrounding the rotor. A guide-blade cascade is capable of being pushed axially into the annular space near the outer circumference of the rotor. The guide-blade cascade includes guide blades, is guided in an annular gap between an inner part and the turbine casing and is axially displaceable via an axial slide by a sliding sleeve. The guide-blade cascade with the axial slide, the inner part and/or the sliding sleeve are produced from an austenitic cast steel material having the following components:C≦0.2%;Si 1.5-2.5%;Mn≦2.00%;P≦0.045%;S≦0.03%;Cr 24.0-26.0%;Ni 19-22%; andW≦5%.