Spring biased sealing method for an actuating shaft

摘要

The propensity for gas and soot leakage around a shaft, which extends through a bore which connects volumes of differing pressures, e.g., a turbocharger turbine housing and the ambient air, is minimized with the addition of a pair of seal rings axially biased by a spring to provide a continuous gas and soot seal. The spring may bias the seal rings apart from each other or towards each other.

主权项

1. A turbocharger with an actuator (73) located outside the turbocharger for actuating a device within a turbine housing, including a shaft (63) which is rotatably mounted in a bore extending through the turbine housing tor transmitting an actuating movement from the actuating mechanism to the device, wherein at least one of said shaft and said bore is associated with an axially elongate circumferential space having first and second axial ends, wherein at least two generally annular seal members (80) are located in said space, and wherein a mechanical spring means (30) is disposed between said at least two generally annular seal members (80) to spring-bias both seal members axially.