Patent ID: 9163520
Filing Date: 2015-10-20
Classification: F01D,F05D

Abstract:
1. A turbine wheel having an axis of rotation and comprising: a disk having a periphery and a side face; a plurality of blades assembled on the disk, each blade including a root of the blade and a first hook projecting axially therefrom, the first hook being oriented radially and defining a first groove that opens radially towards the axis of rotation of the turbine wheel; the disk including a series of second hooks projecting axially from its side face on a same side as the first hooks, each second hook being oriented radially and defining a second groove that opens radially towards the axis of rotation of the turbine wheel; and an axial retaining ring including at least one tab and configured to be arranged in the first groove and in the second groove to retain the blades axially relative to the disk, the ring presenting an outer annular portion from which the tab does not extend, and the tab occupying an inner annular portion of the ring, wherein the tab is configured to be arranged between two roots of adjacent blades so as to limit movements of the ring in azimuth, wherein a depth of the second groove is less than a distance between the outer peripheral edge of the of the ring and the tab such that the outer peripheral edge of the ring cooperates with a bottom of the second groove and the tab is radially spaced apart from a free edge of the second hook with a first minimum clearance, the first minimum clearance being greater than a radial deformation of the ring at the tab when the turbine wheel is in operation, and wherein a bottom of the first groove is radially further from the axis of rotation than the bottom of the second groove such that the outer peripheral edge of the ring is spaced apart from the bottom of the first groove by a second minimum clearance while the outer peripheral edge of the ring cooperates with the bottom of the second groove, the second minimum clearance being greater than the radial deformation of the ring between the first and second hooks.