Turbine wheel for a turbine engine
A turbine wheel for a turbine engine, comprising a disk carrying blades each having a platform, carrying an impeller connected by a stilt to a root. Each blade comprises an upstream radial wall and a downstream radial wall extending inwards from the platform of the blade. The roots of the blades are engaged into slots on the periphery of the disk, so that the radial walls of the blades and the platforms of the blades are circumferentially arranged end-to-end, and define inter-blade cavities radially inside the platforms, each accommodating an inter-blade sealing and vibration damping member. At least one member comprises an elastically deformable element configured so as to be elastically prestressed against the walls of a cavity in the member mounting position.
1. A turbine wheel for a turbine engine, the turbine wheel comprising a disk carrying blades each having a platform, carrying an impeller connected by a stilt to a root, with each blade comprising an upstream radial wall and a downstream radial wall extending inwards from the platform of the blade, with the roots of the blades being engaged into slots on the periphery of the disk, so that the radial walls of the blades and the platforms of the blades are circumferentially arranged end-to-end, and define inter-blade cavities radially inside the platforms each accommodating an inter-blade sealing and vibration damping member, wherein at least one member comprises a flanged edge extending inwards from a bottom wall applied to radially inner faces of the platforms, with the flanged edge comprising at least two opposite flanks, two end portions which join the flanks, and two elastically deformable upstream and downstream lugs facing each other, each formed in between two notches on each end portion, each lug being elastically prestressed against the upstream and downstream radial walls of a cavity in said member mounting position, a first lug protrudes radially inwards from the upstream end portion of the flanged edge and a second lug protrudes radially inwards from the downstream end portion of the flanged edge.
2. The turbine wheel according to claim 1 , wherein the first lug and the second lug respectively cover a junction between the adjacent upstream radial walls and a junction between two adjacent downstream radial walls.
3. The turbine wheel according to claim 1 , wherein the upstream portion and the downstream portion of the flanged edge of the member each comprise two slots radially opening inwards and respectively formed on opposite sides of each of the first and second lugs.
4. A turbine engine comprising a turbine, the turbine comprising at least one turbine wheel according to claim 1 .
5. A sealing and vibration damping member comprising a bottom wall and extending inwards from the bottom wall, the flanged edge a flanged edge having two opposite flanks and two end portions which join the flanks and which each carries an elastically deformable lug extending opposite the bottom wall from the flanged edge, said end portions each comprising two notches formed adjacent to and on opposite sides of the lugs, wherein the first lug protrudes from the upstream end portion of the flanged edge opposite of the bottom wall and the second lug protrudes from the downstream end portion of the flanged edge opposite of the bottom wall.