Patent ID: 8721293
Filing Date: 2014-05-13
Classification: F01D

Abstract:
1. A turbine wheel comprising: a plurality of blades; a rotor including a disk having opposite upstream and downstream side end faces at a periphery of the disk and including the blades mounted at the periphery of the disk, each blade including an airfoil with a foot secured to a platform carrying an attachment member having opposite upstream and downstream side end faces and engaged in a housing opening out into the periphery of the disk, the housings extending axially over an entire distance between the opposite upstream and downstream side end faces of the periphery of the disk and being separated from one another by portions of the disk that form teeth; and axial retaining devices for retaining the blades on the disk, the blades being retained axially at a first one of the upstream and downstream side end faces of the disk by a retaining plate and being retained axially at a second other of the upstream and downstream side end faces of the disk by portions in relief formed under the platforms of the blades pressing axially against portions in relief formed on the teeth of the disk, wherein an axial pressure is set back relative to the side faces of the attachment members situated on the second side end face of the disk, wherein the upstream and downstream side end faces of the attachment members of the blades and of the disk at the periphery thereof are situated substantially in a same plane on each of the upstream and downstream side of the periphery of the disk, respectively, and wherein the retaining plate comprises teeth exerting the axial pressure against the side end face of the attachment member without contacting the first side end face of the disk.