摘要
鉴于破碎齿辊弯曲振动模型和破碎机系统扭转振动模型的局限性,为探究冲击-破碎复合负载激励对齿辊和破碎机系统振动特性的影响规律,利用冲击动力学方法和能量法通过Lagrange方程推导出齿辊承受复合负载激励条件下破碎机系统的弯扭耦合动力学方程,并基于Runge-Kutta方法进行数值仿真,分析五种负载激励下破碎齿辊的弯曲振动响应和破碎机系统的扭转振动响应。仿真结果表明:相较于恒定负载激励,扰动冲击负载使齿辊沿负载方向的弯曲振幅增加了87.79%;扰动破碎负载使齿辊在x向和y向的弯曲振幅分别增加了29.36%和29.61%,其扭振角也出现了0.0037 rad的增幅;复合负载激励导致齿辊产生0.006 m的弯曲振动响应和0.023 rad的扭振响应,将加速齿辊和传动设备的疲劳损坏,影响破碎机系统的高效作业和可靠运行。研究结果为揭示高能频繁冲击等复合负载激励下齿辊和传动设备的结构动态特性及损伤机理提供了一定的参考。
In view of limitations of the bending vibration model of a crushing-toothed roller and the torsional vibration model of a crusher system,in order to explore the influence of impact-crushing composite load excitation on the vibration characteristics of the toothed roller and crusher system,a bending-torsion coupling dynamic equation of the crusher system under composite load excitation of the toothed roller was derived by using the impact dynamics method and the energy method through the Lagrange equation.Based on the Runge-Kutta method,a numerical simulation was carried out to analyze the bending vibration response of the toothed roller and the torsional vibration response of the crusher system under five types of load excitations.The simulation results show that,compared with constant load excitation,disturbance impact load can increase the bending amplitude of the toothed roller along load direction by 87.79%.Disturbance crushing load can increase the bending amplitude of the toothed roller by 29.36% and 29.61%in x direction and y direction respectively,and the torsional vibration angle also can be increased by 0.0037 rad.The bending amplitude and torsional amplitude of the toothed roller generated by composite load excitation are 0.006 m and 0.023 rad respectively so as to accelerate the fatigue damage of the toothed roller and transmission equipment and affect the efficient and reliable operation of the crusher system.The study results provide a certain reference for revealing the structural dynamic characteristics and damage mechanism of the toothed roller and transmission equipment under composite load excitation that include high energy frequent impact and so forth.
作者
李建刚
高仲杰
陈璇
关晓伟
陈善靖
王鑫
卢万杰
付雄
LI Jiangang;GAO Zhongjie;CHEN Xuan;GUAN Xiaowei;CHEN Shanjing;WANG Xin;LU Wanjie;FU Xiong(Research Institute of Technology and Equipment for the Exploitation and Utilization of Mineral Resources,Liaoning Technical University,Fuxin 123000,China;College of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,China;Liaoning Provincial Key Laboratory of Large-Scale Industrial and Mining Equipment,Fuxin 123000,China)
出处
《振动与冲击》
北大核心
2025年第18期226-240,共15页
Journal of Vibration and Shock
基金
国家自然科学基金(52474173)
辽宁省高校基本科研项目(LJKZ0342,LJ242510147003)。
关键词
齿辊破碎机
复合负载激励
弯扭耦合
振动特性
力学模型
toothed-roller crusher
composite load excitation
bending-torsion coupling
vibration characteristics
mechanical model
