US 12,104,491 B2
Method for manufacturing an abradable sealing element, and abradable sealing element
Hubert Jean-Yves Illand, Moissy-Cramayel (FR); Serge Georges Vladimir Selezneff, Moissy-Cramayel (FR); Guillaume Fradet, Moissy-Cramayel (FR); and Laurent Paul Dudon, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/629,273
Filed by Safran Aircraft Engines, Paris (FR)
PCT Filed Jul. 23, 2020, PCT No. PCT/EP2020/070776
§ 371(c)(1), (2) Date Jan. 21, 2022,
PCT Pub. No. WO2021/013920, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 1908330 (FR), filed on Jul. 23, 2019.
Prior Publication US 2022/0243604 A1, Aug. 4, 2022
Int. Cl. F01D 11/12 (2006.01); C23C 4/12 (2016.01); F16J 15/44 (2006.01)
CPC F01D 11/122 (2013.01) [C23C 4/12 (2013.01); F16J 15/445 (2013.01); F05D 2240/55 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for continuously manufacturing an abradable sealing element for a turbomachine,
wherein this sealing element comprises a support substrate covered by a coating comprising at least three successive stacked layers, each of these at least three successive layers comprising a sublayer of abradable material and a sublayer of anti-erosion material and the various layers being placed in a direction of stacking of layers, so that a sublayer of abradable material is alternated with a sublayer of anti-erosion material, and wherein the various sublayers of abradable material of this coating have a mechanical resistance to wear which decreases from the sublayer of abradable material closest to the support substrate to that farthest from this support substrate in the direction of stacking of these layers,
wherein this method comprises the steps of:
a) placing at least one support substrate on a rotary carousel around which are placed at least two thermal spray torches, one of the two torches enabling the sublayer of abradable material to be deposited and the other of the two torches enabling the sublayer of anti-erosion material to be deposited,
b) rotating the carousel so as to bring said support substrate successively opposite one then the other of the two thermal spray torches and to carry out the deposition of the sublayer of anti-erosion material and the deposition of the sublayer of abradable material and to repeat this operation of rotating the carousel and depositing the sublayers so as to obtain said abradable sealing element.