Patent ID: 8636467
Filing Date: 2014-01-28
Classification: F01D,F02B,F05D

Abstract:
1. A variable geometry turbine comprising a turbine wheel mounted within a housing for rotation about a turbine axis, a gas flow inlet passage upstream of said turbine wheel, and a gas flow control mechanism located upstream of said turbine wheel and operable to control gas flow through said gas flow inlet passage, and an actuator assembly for operating the control mechanism, the control mechanism comprising a movable member for varying the size of the gas flow inlet passage, the movable member being mounted on at least one guide member that is translatable in a direction substantially parallel to the turbine axis, the actuator assembly comprising a rotary drive member and a drive shaft, the rotary drive member being configured to drive the drive shaft in rotation about a drive axis, the drive shaft being transverse to the at least one guide member and arranged to drive the at least one guide member in translation, the drive shaft having at least one first drive formation arranged around its drive axis for engagement with at least one second drive formation on the at least one guide member.