Research On Dynamic Performance Of Supporting System Of High-speed Winding Spindle

High-speed winding machine is an important unit machine on the chemical fiber filament production line.The spindle support system of the winding machine is mainly composed of a slewing bearing and a frame,which provides support for the stable operation of the two sets of winding spindles.During the wire winding process,the slewing bearing is used to realize the time-varying of the winding position of the spindle and the switching between the spindles after the winding is completed,so as to achieve the purpose of continuous winding.In order to improve production efficiency and meet the development of new functional fibers,as well as green production,higher winding speed and more environmentally friendly production equipment are required,which puts forward higher requirements for the comprehensive performance of the high-speed winding spindle support system.The static and dynamic performance of the spindle support system is the key to the normal operation of the winder.According to the school-enterprise cooperation project "High-speed winder technology and comprehensive performance improvement" task,based on Hertz contact theory and finite element simulation analysis method,the static and dynamic characteristics of the spindle support system are analyzed,and the spindle support system is analyzed.Lightweight design of the system.The main research contents are as follows:Firstly,the structural composition and working principle of the winder are analyzed,and the structural characteristics of each component of the spindle support system and the contact characteristics of the contact interface are preliminarily mastered.According to the working conditions of the winder,the CAD model of the spindle support system is established.Secondly,the mechanical model of the slewing bearing is established based on the Hertzian contact theory,and the contact load distribution is solved.Because the deformation of the slewing bearing under external load is approximately in the linear range,the finite element model of the slewing bearing is established by using the linear spring equivalent instead of the cylindrical roller.Comparing the calculation results of the mechanical model with the finite element simulation results,the correctness and effectiveness of the finite element model of the slewing bearing established in this paper are verified.Since the slewing bearing is fixed on the frame by bolts,this paper comprehensively uses the theoretical formula and finite element analysis method to obtain the equivalent stiffness of the bolted connection.Then,the finite element model of the spindle bearing system is established,and the static and dynamic studies are carried out to analyze its deformation,natural frequency and mode shape characteristics,and transient response.Finally,the lightweight design scheme of the spindle support system is proposed,the optimization target is set in the ANSYS platform,and the boundary conditions for the deformation and natural frequency of the spindle support system are set.The relevant parameters are optimized to achieve the lightweight goal.The analysis work in this paper can provide reference theory and certain technical support for the research and development of high-speed winder...