Patent ID: 9121300
Filing Date: 2015-09-01
Classification: F01D,F02B,F02C,F02M,F05D,Y02T

Abstract:
1. A variable geometry turbocharger comprising: a bearing housing rotatably supporting a turbine impeller; and an exhaust nozzle that can change the flow rate of an exhaust gas supplied to the turbine impeller, wherein the exhaust nozzle has an exhaust inlet wall disposed at the bearing housing side of the exhaust nozzle, the turbocharger has a seal member exhibiting a ring shape and sealing a gap formed between the bearing housing and the exhaust inlet wall, an inner circumferential edge of the seal member firmly contacts the bearing housing and an outer circumferential edge of the seal member firmly contacts the exhaust inlet wall, the seal member is a disc spring, a shield plate that is a ring-shaped plate is disposed at the turbine impeller side of the bearing housing, and the disc spring is disposed between the shield plate and the bearing housing, the outer circumferential edge of the seal member has a curved section that curves in a direction away from the exhaust inlet wall, and a projecting section projecting from a surface of the bearing housing facing the turbine impeller to the turbine impeller is fitted to an inner circumferential edge of the shield plate, and the shield plate and the bearing housing pinch the inner circumferential edge of the seal member.