Turbomachine rotor blade
View Patent ↗A turbomachine rotor blade, said blade having, at the distal end thereof, a heel comprising: a platform ( 2 ) having a first edge ( 201 ) on the lower side and a second edge ( 202 ) on the upper side, at least one sealing member having a first end portion ( 301 ) on the lower side and a second end portion ( 302 ) on the upper side, said sealing member having a sealing top that extends radially outwards from said platform ( 2 ) between said first and second end portions ( 301, 302 ), characterized in that, for at least one sealing member, the heel ( 105 ) comprises, on at least at one of the edges ( 201, 202 ), a portion forming a bowl ( 5 ) extending along the end portion ( 301, 302 ) of the sealing member which corresponds to the edge ( 201, 202 ), the portion forming the bowl ( 5 ) being suitable for receiving a deposit of anti-wear material.
1. A rotor blade for a turbomachine, said blade having at its distal end ( 103 ) a heel ( 105 ) including:
a platform ( 2 ) having a first edge ( 201 ) on the lower side and a second edge ( 202 ) on the upper side,
at least one seal lip ( 3 ) having a first end portion ( 301 ) on the lower side and a second end portion ( 302 ) on the upper side, said seal lip ( 3 ) having a seal lip top extending radially outward from said platform ( 2 ) between said first and second end portions ( 301 , 302 ),
wherein, for at least one seal lip ( 3 ) the heel ( 105 ) includes at one of the edges ( 201 , 202 ) at least one portion forming a cup ( 5 ) extending along the end portion ( 301 , 302 ) of the seal lip ( 3 ) which corresponds to the edge ( 201 , 202 ), the portion forming a cup ( 5 ) designed to receive a deposit of an anti-wear material ( 7 ), and in that the at least one portion includes a layer of antiwear material ( 7 ) deposited by loading a melted alloy into each cup ( 5 ) thus formed,
wherein each portion forming a cup ( 5 ) includes two lateral walls ( 501 , 502 ) extending on either side of the end portion ( 301 , 302 ) of the corresponding seal lip ( 3 ), which lateral walls extending on either side of the seal lip form lateral walls of the cup and the end portion ( 301 , 302 ) of the seal lip ( 3 ) forms the bottom of the cup ( 5 ).
2. The rotor blade according to claim 1 , wherein the heel ( 105 ) includes, for at least one seal lip ( 3 ), at the first ( 201 ) respectively second ( 202 ) edge, a first, respectively second portion forming a cup ( 5 ) extending along the first, respectively second, end portion ( 301 , 302 ) of the seal lip ( 3 ), the first, respectively second portion forming a cup ( 5 ) being designed to receive a deposit of anti-wear material ( 7 ).
3. The rotor blade according to claim 1 , including an upstream seal lip ( 3 ) and a downstream seal lip ( 4 ).
4. The rotor blade according to claim 1 , wherein the anti-wear material is a cobalt-based metal alloy.
5. The rotor blade of a turbomachine according to claim 1 , wherein the blade is a rough blade part prior to machining.
6. The rotor blade of a turbomachine according to claim 1 , wherein the blade is a machined blade.
7. The rotor blade according to claim 1 , wherein the anti-wear material extends on the whole height of the seal lip.
8. A method for depositing anti-wear material on a rotor blade of a turbomachine, comprising:
supplying a rough part of a rotor blade of a turbomachine prior to machining, said part having at its distal end ( 103 ) a heel ( 105 ) including:
a platform ( 2 ) having a first edge ( 201 ) on the lower side and a second edge ( 202 ) on the upper side,
at least one seal lip ( 3 ) having a first end portion ( 301 ) on the lower side and a second end portion ( 302 ) on the upper side, said seal lip ( 3 ) having a seal lip top extending radially outward from said platform ( 2 ) between said first and second end portions ( 301 , 302 ), such that, for at least one seal lip ( 3 ), the heel ( 105 ) includes at one of the edges ( 201 , 202 ) at least one portion forming a cup ( 5 ) extending along the end portion ( 301 , 302 ) of the seal lip ( 3 ) which corresponds to the edge ( 201 , 202 ), the portion forming a cup ( 5 ) being designed to receive a deposit of anti-wear material ( 7 ), wherein each portion forming a cup ( 5 ) includes two lateral walls ( 501 , 502 ) extending on either side of the end portion ( 301 , 302 ) of the corresponding seal lip ( 3 ), which lateral walls extending on either side of the seal lip form lateral walls of the cup and the end portion ( 301 , 302 ) of the seal lip ( 3 ) forms the bottom of the cup ( 5 ),
depositing a layer of anti-wear material ( 7 ) by loading with a melted alloy into each cup ( 5 ) formed, and
machining lateral walls ( 501 , 502 ) of the cup ( 5 ) extending past the layer of anti-wear material ( 7 ) deposited.
9. The method according to claim 8 , further comprising after said machining, sanding the surface of the layer of anti-wear material ( 7 ) and the lateral walls.