Gas turbine engine compressor blade restoration

B - Operations – Transporting – 23 – P

Patent

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Details

B23P 6/00 (2006.01) B23K 10/02 (2006.01) B23K 31/02 (2006.01) F01D 5/00 (2006.01) F01D 5/14 (2006.01)

Patent

CA 2405335

A method of repairing a gas turbine engine compressor blade airfoils includes machining away airfoil material (50) along leading and trailing edges and a radially outer tip of the airfoil to form leading edge, trailing edge, and tip cut- backs (66, 68, 69). Then beads of welding material (72) are welded onto the leading edge, trailing edge, and tip cut-backs (62, 62, 64). Then some of the weld material is machined away from the weld bead (70) to obtain desired finished dimensions of the leading and trailing edges and radially outer tip (66, 68, 69). Blade material along only radially outermost portions (80) of the leading and trailing edges (LE, TE) extending from the tip towards a base of the airfoil (32) is machined away. A rounded corner (30) is formed between the leading edge and trailing edge cut-backs (62, 63) and unmachined portions (74) of the airfoil (34) between the outermost portions (80) of the leading and trailing edges (LE, TE) and the base of the airfoil (32).

Cette invention concerne une méthode de réparation des profils d'aubes de compresseur de turbine à gaz. Elle comprend le retrait du matériau par usinage (50) des profils le long des bords d'attaque et de fuite et une pointe radiale extérieure pour former le découpage du bord d'attaque, du bord de fuite et de la pointe (66, 68, 69). Puis les cordons de soudure (72) sont soudés sur les découpages du bord d'attaque, du bord de fuite et de la pointe (62, 62, 64). Puis une partie du matériau de soudure est enlevé du cordon par usinage (70) pour obtenir les dimensions finales souhaitées des bords d'attaque et de fuite et de la pointe radiale extérieure (66, 68, 69). Le matériau de l'aube le long des parties radiales les plus externes (80) des bords d'attaque et de fuite (BA, BF) dépassant de la pointe vers la base du profil (32) est enlevé par usinage. Un coin rond (30) est formé entre les découpages des bords d'attaque et de fuite (62, 63) et les parties non usinées (74) du profil (34) entre les parties les plus externes (80) des bords d'attaque et de fuite (BA, BF) et la base du profil (32).

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