TECHNOLOGY FOR RESTORATION AND REPAIR OF AIRCRAFT ENGINE PARTS

• Published in: Aviation (Vilnius, Lithuania) Vol. 25; no. 4; pp. 262 - 267
• Main Authors: Nyzhnyk, Serhii, Zorik, Ihor, Danko, Kostiantyn, Nugaras, Justas
• Format: Journal Article
• Language: English
• Published: Vilnius Vilnius Gediminas Technical University 01-12-2021
• Subjects: adhesive strength; Aircraft; Aircraft engines; Aluminum oxide; blade; coating; Coatings; cohesive strength; Compressor blades; deformation; Deposition; Detonation; end face; energy; Engine components; Gas turbine engines; Guide vanes; Modernization; Process parameters; Service life; Spraying; Substrates; technologies; Titanium alloys; Titanium base alloys
• ISSN: 1648-7788; 1822-4180
• DOI: 10.3846/aviation.2021.15924

Problems of increasing the service life of compressor blades of aircraft gas turbine engines using detonation spraying technology are considered. The simulation of the parameters of the velocity and temperature of the particles of the sprayed material in the barrel of the detonation unit and in the flooded space to the substrate was carried out, followed by the choice of the optimal technological parameters of the spraying process. The control system of the detonation unit has been modernized. An experiment was carried out on the deposition of the Al2O3 coatings on the samples of a substrate made of titanium alloy VT3-1. Based on the results of the experiment, technological recommendations were developed concerning both the parameters of the spraying process and the parameters of the preparation of the substrate surface before spraying. The equipment for brazing the blades of the guide vanes is described and a device for spraying coatings on the end surfaces of the compressor blades is proposed. Thus, a complex technology has been developed for restoring the end surfaces of titanium alloy compressor blades by deposition of Al2O3 coatings.