VARIABLE GEOMETRY TURBINE ACTUATOR ASSEMBLY

摘要

An actuator assembly for a variable geometry turbine in which an inlet passageway to the turbine is defined between a movable annular wall member and a facing wall, the position of the movable annular wall member being adjustable to control the width of the inlet passageway. The annular wall member is supported on a pair of pins which extend parallel to and are slidable parallel to the axis of the rotation of the turbine wheels. Each pin is engaged by a respective arm of a pivotally mounted stirrup the angular position of which is controlled by a single actuator. The engagement between the pins and the stirrup is such that pivotal movement of the stirrup causes axial movement of the pin.