ANNOTATION
Serhii Ulanov. Improving the quality of manufacturing of the axial compressor rotor parts of the gas turbine engine by technologies methods. - Qualifying scientific work on the rights of the manuscript.
Dissertation for the degree of PhD in specialty 134 «Aviation and rocket and space technology». – National University «Zaporizhzhia Polytechnic», Zaporizhzhia 2021; National Aerospace University – «Kharkiv Aviation Institute», Kharkiv, 2021.
The types and features of construct of the axial compressor’s rotors of aircraft gas turbine engines are considered. The analysis of technological methods influence of manufacturing on quality parameters of a surface layer and operational characteristics of shafts of GTE is carried out.
The analysis of technological methods influence of manufacturing on quality parameters of a surface layer and operational characteristics of compressors rotors disks of GTE is carried out.
The analysis of technological methods influence of manufacturing on quality parameters of a surface layer and operational characteristics of compressors working blades of GTE is carried out.
Technological heredity and its influence on operational properties of details are considered.
Based on the results of the analytical review of literature sources, conclusions are formulated, as well as the purpose and objectives of the study are substantiated.
Methodical support of researches for achievement of the set tasks which includes a technique, the equipment and the tool for processing of disks and welded drums of compressors rotors in a fluidized abrasive layer, and also a technique and the equipment for research of ultrasonic strengthening of details of compressor rotors.
Research methods of influence of technological heredity on parameters of quality of details and relaxation of residual stress in a surface layer under the influence of thermal exposure, and also research methods of characteristics of a surface layer and mathematical processing of experiments results are presented.
The classification of the axial compressor’s rotor parts according to structural and technological features is performed.
The developed technology of disks processing and welded drums of compressors rotors in a fluidized bed of abrasive is presented. The basic regularities of the process of disk processing in the fluidized bed of abrasive are established.
The results of researches of natural disks processing of the compressor in a fluidized bed of abrasive and quality of their surface layer are resulted.
It is established that the treatment of rotors of GTE compressors from titanium alloys in the fluidized bed of abrasive increases their durability by 2,5…3,0 times, and the treatment of welded drums in the fluidized bed of abrasive with air nozzles increases their durability by 2,2 times.
Analytical regularities of parameters of the surface layer of thin - walled parts from intensive residual deformation after hardening processing are established and the comparative characteristic of accuracy depth definition of the strengthened layer at processing of details by surface plastic deformation is given.
The regularities of formation of residual stresses in the surface layer of the blade pen by technological methods considering the technological heredity, as well as the regularities of residual stress relaxation in the surface layer of thin-walled parts depending on their thermal exposure are presented.
The influence of cold deformation and heat treatment of heat-resistant alloy on the operational properties of the compressor blades and the technological heredity of the variants of manufacturing technology compressor blades on the increase of the endurance limit is shown.
It is established that the increase in the endurance limit of the compressor blades made of titanium alloy after ultrasonic hardening reaches 1,41, and for heat-resistant alloy – 1,26 times.
The developed and implemented technological equipment and technological recommendations of details of rotors of compressors of GTE in a fluidized bed of abrasive are resulted.
Technological recommendations of ultrasonic hardening of compressor blades are developed.
The main results and recommendations of the work were implemented at «MOTOR SICH» and in the educational process of the National University «Zaporizhzhia Polytechnic».
Keywords: disks, welded drums, compressor blades, fluidized abrasive, vibroabrasive treatment, ultrasonic hardening treatment, technological equipment, technological recommendations, durability, endurance limit.
