基于动态特性分析的SG-90200大型粉碎机刀架轴设计与研究

刀架轴强度、刀片间隙、动态特性等参数对塑料粉碎机粉碎效果有较大影响。为确保SG-90200大型粉碎机工作的可靠性,避免刀架轴断裂,降低粉碎机振动,提高粉碎效率,对刀架轴危险截面进行校核,所得结果满足设计要求;采用正交试验与样机验证相结合的方法,得出刀架轴最佳刀片间隙、动刀厚度及刃高参数;运用ANSYS Workbench对其进行动力学、静力学分析,采用动平衡机HQ-500及动态信号分析仪COCO-80对最优刀架轴结构进行动态特性实验,将有限元分析结果与动态信号分析仪测得的动态特性实验结果进行对比,研究结果显示:两者频率误差控制在5%以内,HQ-500动平衡机测试其动平衡度在95%以上;同时,SG-90200大型粉碎机刀架轴与批量生产的SG-4390型粉碎机刀架轴静力学分析结果相当,其粉碎效率及能耗最优;ADAMS动力学分析显示,随着刀架轴所受粉碎载荷的增加,刀架轴所受冲击也增大。

Design and Research of Carrier Shaft for SG-90200 Large Crusher Based on Dynamic Characteristics Analysis

The strength of carrier shaft,the clearance of blade and the dynamic characteristics have great influence on the crushing effect of the plastic crusher.In order to ensure the reliability of SG-90200 large crusher,avoid the fracture of the carrier shaft,reduce the vibration of the crusher and improve the crushing efficiency,the dangerous section of the carrier shaft was checked and the results met the design requirements.The optimum parameters of blade clearance,moving tool thickness and blade height of the carrier shaft were obtained by combining the orthogonal test and prototype verification.ANSYS Workbench was used to analyze the dynamics and statics of the carrier shaft.The dynamic characteristics of the optimal carrier shaft structure were analyzed by the dynamic balancing machine HQ-500 and the dynamic signal analyzer COCO-80,and the results were compared with the finite element analysis results.The results show that the frequency error is within 5%.The dynamic equilibrium degree of the SG-90200 large crusher carrier shaft measured by HQ-500 dynamic balancing machine is over 95%.The static analysis results of SG-90200 and SG-4390 large crusher are consistent.However,the SG-90200 large crusher carrier shaft has the best crushing efficiency and energy consumption.Dynamic analysis of ADAMS shows that with the increase of crushing load,the impact on carrier shaft is increased.