锻压技术

液压缸驱动下叶片辊轧机传动系统动力学特性

英文标题：Dynamic characteristics of blade rolling mill transmission system driven by hydraulic cylinder

作者：张瑜1 2 侯绿原1 赵飞1

单位：1.安阳工学院机械工程学院 2. 安阳工学院安阳市先进航空材料与加工技术重点实验室

分类号：TG339

出版年,卷(期):页码：2023,48(9):156-167

摘要：

为了分析液压缸非线性动力学特性对叶片辊轧机传动系统振动的影响，建立了液压缸与叶片辊轧机传动系统耦合振动模型，考虑载荷作用下齿条基体产生弹性变形，推导出上轧辊二级齿轮-齿条时变啮合刚度，采用Runge-Kutta法求得了系统动力学特性，研究了无杆腔的初始有效长度、齿轮-齿条啮合刚度等参数对辊轧机传动系统的动力学特性的影响。分析表明，无杆腔的初始有效长度的增加，使系统逐步由周期运动进入倍周期运动，最终转为混沌运动；此外，齿轮-齿条啮合刚度引起上轧辊一级齿轮以及上轧辊二级齿轮-齿条的振动位移在初始时刻产生一定的波动，而对下轧辊一级齿轮的运动状态影响较小。

In order to analyze the influence of nonlinear dynamic characteristics for hydraulic cylinders on the vibration of transmission system for blade rolling mill, the coupled vibration model of hydraulic cylinder and transmission system for blade rolling mill was established. Considering the elastic deformation of rack matrix under load effect, the time-varying meshing stiffness of secondary gear-rack for upper roll was derived. The Runge-Kutta method was used to obtain the dynamic characteristics of system. The effect of parameters such as initial effective length of rodless cavity and meshing stiffness of gear-rack on the dynamic characteristics of transmission system for rolling mill were studied. The results show that the increasing of the initial effective length of rodless cavity causes the system to gradually move from periodic motion to multiplier motion, and eventually to chaotic motion. Besides, the meshing stiffness of gear-rack causes the fluctuation for vibration displacement of primary gear and secondary gear-rack of upper roll at the initial moment, and has less effect on the movement state of primary gear of lower roll.

基金项目：

河南省高等学校重点科研项目（22A460007）；2022年河南省重点研发与推广专项（222102220020）；2022安阳市科技特派员

张瑜（1987-），男，博士，讲师 E-mail：z13464238735@sina.com

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图24有无考虑齿条基体变形的上轧辊二级齿条振动信号图

（a）振动加速度（b）频谱图

Fig.24Vibration signal diagrams of secondary rack for upper roll with and without considering rack matrix deformation

(a)Vibration acceleration(b)Spectral diagram

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