Turbomachine rotor wheel having composite material blades
View Patent ↗A turbomachine rotor wheel having composite material blades is disclosed. The wheel includes a slideway disk having a circumferential groove at its outer periphery, the groove having an opening that is narrower than its bottom, with a plurality of composite material blades each having a blade root engaged in the groove of the slideway disk and presenting a longitudinal section adapted to the longitudinal section of the slideway disk in order to be held radially therein by co-operating shapes, and an orientation disk fastened coaxially around the slideway disk and including, in its outer periphery, a plurality of axial slots each of which is open at one end. Each slot presents a cross-section that is adapted to the cross-section of a corresponding blade root so as to hold it angularly by co-operating shapes.
1. A turbomachine rotor wheel having composite material blades, comprising:
a slideway disk having at its outer periphery a circumferential groove presenting an opening that is narrower than its bottom;
a plurality of blades of composite material, each blade having a blade root engaged in the groove of the slideway disk and presenting a longitudinal section that is adapted to a longitudinal section of the groove of the slideway disk so as to be held radially therein by co-operating shapes, and a platform for defining a portion of an inner wall of a flow passage for a gas stream passing through the rotor wheel; and
an orientation disk having at its outer periphery a substantially longitudinal portion with a plurality of axial slots, each open at one end and each presenting a cross-section matching a cross-section of a blade root so as to hold the root angularly by co-operating shapes, the orientation disk being mounted on the slideway disk so that its longitudinal portion is received radially between the blade platforms and the opening of the groove of the slideway disk.
2. The wheel according to claim 1 , wherein the groove of the slideway disk includes, at an axial end, a side wall connecting its bottom to its opening.
3. The wheel according to claim 2 , wherein each blade root includes an axial notch co-operating with a rim of the side wall of the groove of the slideway disk.
4. The wheel according to claim 2 , further including a positioning ring connecting the bottom of the groove of the slideway disk to its opening at another axial end of the groove.
5. The wheel according to claim 4 , wherein each blade root includes another an axial notch co-operating with a rim of the positioning ring.
6. The wheel according to claim 1 , wherein the groove of the slideway disk includes, at each axial end, a respective side wall connecting its bottom to its opening.
7. The wheel according to claim 6 , wherein each blade root has two axial notches, each co-operating with a rim of a respective side wall of the groove of the slideway disk.
8. The wheel according to claim 1 , further including means for holding the orientation disk radially around the slideway disk.
9. A turbomachine including at least one rotor wheel according to claim 1 .