Analysis Of Dynamic Performance Of High-speed Spindle Rotor System Under The Coupling Temperature Field

With the rapid development of aviation industry,the performance requirements of aero-engine become higher and higher,and the performance of blade seal coating has a direct influence on the performance of aero-engine.Scraping test machine for aeroengine blade sealing coating is the key experimental equipment for testing and evaluating the properties of sealing coating materials.Due to the lack of theoretical analysis of the main shaft rotor system under high temperature and high-speed environment,the maximum speed and the maximum line speed of the test machine are low,which can not simulate the actual working conditions of the engine.In this paper,the core components of the test machine--high-speed rotor system consisting of spindle and disc were taken as the object of study.In view of the high temperature and high-speed requirements of the test machine,the dynamic performance of the high-speed spindle rotor system coupled with temperature field was analyzed by means of numerical analysis based on transfer matrix method and finite element analysis.The influence of various parameters on their dynamic characteristics was studied,and their structural parameters were optimized.Finally,the optimization scheme of high-speed spindle rotor system was determined.A simplified calculation model of high-speed rotor system was established based on transfer matrix method.An improved transfer matrix formula for calculating the critical speed and unbalance response of the rotor system was derived.The thickness of the disk was included to improve the accuracy of the calculation results.According to the deduced transfer matrix,the dynamic performance of the simplified model,such as critical speed and unbalanced response,was calculated and analyzed.Based on transfer matrix method,the influence factors of dynamic performance of high-speed rotor system were numerically analyzed.Analysised of the influence of rotor size and bearing structure parameters on the dynamic performance of the law and the effect magnitude calculation,including the thickness of the disk,the outer diameter of the rotor,bearing span,cantilever distance,bearing stiffness and other factors.The dynamic performance of the high-speed rotor system,including the modal analysis,critical speed analysis,stress analysis and unbalance response analysis were carried out.The temperature rise of the rotor system was studied,and the dynamic finite element analysis was carried out under the coupling of temperature field.The running test of the high speed spindle was carried out on the test machine.The accuracy of the analysis results was verified by testing the spindle speed and vibration in the test.The influence of the rotor structural parameters on the dynamic performance of the coupled temperature field was analyzed.The structural parameters of the rotor wereoptimized by combining the numerical results of the transfer matrix method and the results of the finite element analysis.