Dynamic Analysis And Dynamic Balance Study Of High Speed Winding

The vibration caused by the imbalance in the working state of the high speed winding machine is the main cause of the noise and failure of the winding machine,which restricts the winding efficiency and the quality.At present,there are few researches on winding maneuvering balance,the main reason is that winding machine has complex structure,high performance requirements and difficult dynamic balancing.Based on the analysis of winding dynamics,the research of improving the accuracy and efficiency of winding maneuvering balance is made in this paper.The key component determining the performance of the winding machine is the high speed rotor chuck axis.In this paper,the theoretical modal analysis and experimental modal analysis are carried out on the disc shaft of the winding machine based on the theory of rotor dynamics,mechanical vibration and mechanical balance.Comparing the simulation and experimental modal results,the maximum error is less than 10%.Through the simulation analysis of the disc shaft,the first 7 natural frequencies of the disc shaft are 11.39 Hz,20.49 Hz,20.52 Hz,107.23 Hz,235.98 Hz,236.00 Hz and 250.81 Hz respectively.The first frequency of the shaft coupling,the support sleeve joint and the sleeve combination are 19.40 Hz,249.07 Hz,250.93 Hz respectively.Based on the analysis of winding mechanical characteristics,the action balance experiment of sleeve and chuck shaft is carried out,then the field balancing test of the winder is carried out.The experimental results show that the unbalance of the fixed ends of the chuck shaft is greater than that of the cantilever end,and the vibration amplitude is also the same.After dynamic balancing test,the dynamic imbalance and vibration amplitude of the whole machine were improved obviously.Combined with the dynamic characteristics and dynamic balance test results,measures to improve the mechanical performance of winding and the accuracy and efficiency of winding maneuvering balance are put forward.First,the driving shaft is the main reason for the resonance of the disc shaft.The structure of the transmission shaft is modified within a reasonable allowable range,and the natural frequency is adjusted so that its natural frequency is far away from the natural frequency of the chuck axis to avoid resonance.At the same time,the stiffness of supporting sleeve is increased and the assembly error is reduced.Second,because the dynamic balance of the sleeve is not good,and it seriously affects the efficiency of dynamic balance,it is proposed to cancel the dynamic balance process of the sleeve and to improve the machining precision and process requirements of the sleeve.Third,the high frequency dynamic balance of the chuck shaft is carried out.Fourth,when the disc shaft is balanced,the number of the original dynamic balance holes will be kept and the quality of each hole is increased.The vibration of the protection ring is maximum and the quality is changed to 1g.The vibration of the end cover is relatively small and the mass is changed to 0.6g;and the dynamic balance of the whole machine is increased,the loss of dynamic balance efficiency is not large,the dynamic imbalance and the amplitude of vibration are large.Lower.In this paper,the dynamic analysis of winding machine is carried out by experiment and simulation,and the field dynamic balance test is carried out on the whole winding machine,and the measures to improve the precision and efficiency of the winding machine's performance and dynamic balance are put forward.The research results have important reference value for improving the efficiency and accuracy of winding maneuverability,and guiding significance for improving winding machine performance.