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1. (WO2017137709) METHOD FOR FORMING DUST-REMOVAL HOLES FOR A TURBINE BLADE AND ASSOCIATED CERAMIC CORE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/137709 International Application No.: PCT/FR2017/050310
Publication Date: 17.08.2017 International Filing Date: 10.02.2017
IPC:
B22C 9/10 (2006.01) ,F01D 5/18 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
C
FOUNDRY MOULDING
9
Moulds or cores; Moulding processes
10
Cores; Manufacture or installation of cores
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
D
NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
5
Blades; Blade-carrying members; Heating, heat-insulating, cooling, or antivibration means on the blades or the members
12
Blades
14
Form or construction
18
Hollow blades; Heating, heat-insulating, or cooling means on blades
Applicants:
SAFRAN [FR/FR]; 2, Boulevard du Général Martial Valin 75015 PARIS, FR
Inventors:
ROLLINGER, Adrien Bernard Vincent; FR
BECHELANY, Mirna; FR
Agent:
DAVID, Alain; FR
DESORMIERE, Pierre-Louis; FR
HEALY, Erwan; FR
LAIK, Eric; FR
Priority Data:
165113412.02.2016FR
Title (EN) METHOD FOR FORMING DUST-REMOVAL HOLES FOR A TURBINE BLADE AND ASSOCIATED CERAMIC CORE
(FR) PROCÉDÉ DE FORMATION DE TROUS DE DÉPOUSSIÉRAGE POUR AUBE DE TURBINE ET NOYAU CÉRAMIQUE ASSOCIÉ
Abstract:
(EN) The invention relates to a ceramic core (10) used for the production of a hollow turbine blade for a turbomachine, using the lost-wax foundry technique, said blade comprising calibrated dust-removal holes extending from an apex of at least one cavity (22) and opening into a channel of the blade, each of said calibrated dust-removal holes being formed in a part of the core with a sufficient pre-determined height to ensure mechanical strength, said part of the core comprising a through-opening having an axis perpendicular to a longitudinal axis of the calibrated dust-removal hole and defining, on each side of the through-opening, a core cylinder having a pre-determined diameter corresponding to the dust-removal hole to be formed and a remaining core volume that is intended to be refilled after casting, such that the calibrated dust-removal hole is obtained without being pierced and without the use of connecting rods.
(FR) Noyau céramique (10) utilisé pour la fabrication d'une aube de turbine creuse de turbomachine selon la technique de la fonderie à la cire perdue, l'aube comportant des trous calibrés de dépoussiérage émanant d'un sommet d'au moins une cavité (22) et débouchant dans une baignoire de cette aube, chacun des trous calibrés de dépoussiérage étant formé dans une partie de noyau d'une hauteur déterminée suffisante pour en garantir la tenue mécanique, la partie de noyau comportant un orifice traversant d'axe perpendiculaire à un axe longitudinal du trou calibré de dépoussiérage et délimitant de part et d'autre de cet orifice traversant d'une part un cylindre de noyau d'un diamètre déterminé correspondant au trou de dépoussiérage à former et d'autre part un volume de noyau restant destiné à être rebouché après coulée, de sorte que le trou calibré de dépoussiérage est obtenu sans perçage et sans utilisation de tiges de liaison.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
FR3047767CA3014022CN108698117EP3414031BR112018016416US20190022743