Patent ID: 8608434
Filing Date: 2013-12-17
Classification: F01D,F02C,F05D

Abstract:
1. A variable geometry turbine comprising: a turbine wheel mounted on a turbine shaft within a housing assembly for rotation about a turbine axis, said housing assembly defining a radial gas flow inlet passage upstream of said turbine wheel; an annular wall member defining one wall of said inlet passage and which is displaceable in a direction substantially parallel to said turbine axis to control gas flow through the inlet passage; and a linkage mechanism comprising at least one actuating member operably connected to said annular wall member to control displacement of said wall member, said actuating member extending in a direction substantially parallel to said turbine axis through an aperture defined by a retaining member such that a bearing surface defined by the actuating member extending transverse to said turbine axis is contacted by a surface of the retaining member so as to connect the actuating member to the annular wall member, said aperture being dimensioned to define a clearance between a wall of said aperture and a portion of the actuating member located within said aperture, wherein the aperture defined by the retaining member is at least partially bounded by the surface of the retaining member which contacts the first bearing surface of the actuating member and further wherein said aperture is partially bounded by said surface of the retaining member such that the aperture forms part of a slot.