Patent ID: 6726447
Filing Date: 2004-04-27
Classification: F01D

Abstract:
A variable geometry turbine comprising a housing, a rotor supported in a rotary manner in the housing, the housing defining an inlet channel for an operating fluid in the form of a spiral surrounding the rotor, and an annular vaned nozzle of variable geometry interposed radially between the channel and the rotor in order to control the flow of the operating fluid from the channel to the rotor, characterised in that a first annular vaned ring and a second vaned ring face one another each of the vaned rings comprising an annular member and a plurality of vanes rigidly connected to the annular member and extending towards the annular member of the other vaned ring these vanes being axially tapered to substantially form wedges such that the two pluralities of vanes penetrate one another, at least one of the vaned rings being axially mobile with respect to the other vaned ring so as to define a variable throat section between the vaned rings.