ACTUATOR ROD SEALING SYSTEM

摘要

Turbochargers use actuators to control wastegate valve or VTG vane position to control turbine wheel power. Components of such actuators are susceptible to damage when exposed to foreign liquids, solids and debris. To prevent such ingress, boot seals at the actuator shaft can provide a tortuous path for air aspiration and expulsion from the volume inside the actuator boot is provided at one or more interfaces in the actuator system. Such a path can also prevent ingress of undesired liquids, solid and debris, which can affect actuator performance material. In one arrangement, a tortuous pathway is provided between a boot seal holder and another actuator component. In another arrangement, a tortuous pathway is provided between the actuator shaft and an end portion of a boot seal.

主权项

1. A sealing system for an interface (50) for a turbocharger actuator system comprising:
an actuator boot seal (44); an actuator seal holder (52) operatively connected to an end of the actuator boot seal (44), the seal holder (52) having a center bore (58) and a flange portion (54), the flange portion (54) including an actuator facing surface (56); a component (30) substantially adjacent to the actuator facing surface (56) of the seal holder (52); and a tortuous passageway defined between the actuator facing surface (56) of the flange portion (54) and the component (30).