叶片辊轧机传动系统动力学特性仿真与分析
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摘要
叶片辊轧机传动系统动力学特性是决定叶片加工质量的关键性能之一。基于虚拟样机技术,采用Pro/E建立辊轧机传动系统三维模型,再将其导入RecurDyn中进行动力学仿真,模型中设置各齿轮、齿轮与齿条间为赫兹接触模型,并以轧辊与叶片间的非线性辊轧力作为模型激励载荷,对传动系统的动态特性进行仿真分析。结果表明:传动系统中,轧辊齿轮-齿条、轧辊齿轮-齿轮以及油缸齿轮-齿条之间的接触力曲线均呈现周期性波动;旋转油缸运动过程中,瞬时速度变化周期与大齿轮及侧齿轮的啮合周期相关;上下轧辊齿轮转速平稳,但在轧辊旋转方向改变瞬间,速度存在冲击现象;运动过程中,上、下轧辊角速度变化趋势与旋转油缸角速度变化趋势基本相同。研究结果为优化叶片辊轧机传动系统结构提供了理论依据。
The dynamic characteristics of blade rolling mill transmission system is one of the key properties to confirm the process quality of blades. Based on the virtual prototyping technology,the three-dimensional model of rolling mill transmission system was established by Pro/E,and the dynamic simulation was conducted by inducting it into Recur Dyn. Then,the Hertzian contact model between two gears and gear and rack were set up in the model,and the dynamic characteristics of transmission system were simulated by regarding the nonlinear rolling force between roller and blade as the exciting load. The results show that the curves of contact force between the roller gearrack,the roller gear-gear and the oil cylinder gear-rack show a periodic fluctuation in the transmission system. During the motion process of rotating oil cylinder,the instantaneous speed change period is related to the meshing period of large gear and side gear,and the rotating speeds of up and down roller gears are stable. However,when the rotation direction of roller changes,the speed has an impact phenomenon. During the movement,the change trend of angular speed for up and down rollers is basically the same as that of the rotating oil cylinder. The research results provide theoretical basis for the optimization of transmission system structure of blade rolling mill.
The dynamic characteristics of blade rolling mill transmission system is one of the key properties to confirm the process quality of blades. Based on the virtual prototyping technology,the three-dimensional model of rolling mill transmission system was established by Pro/E,and the dynamic simulation was conducted by inducting it into Recur Dyn. Then,the Hertzian contact model between two gears and gear and rack were set up in the model,and the dynamic characteristics of transmission system were simulated by regarding the nonlinear rolling force between roller and blade as the exciting load. The results show that the curves of contact force between the roller gearrack,the roller gear-gear and the oil cylinder gear-rack show a periodic fluctuation in the transmission system. During the motion process of rotating oil cylinder,the instantaneous speed change period is related to the meshing period of large gear and side gear,and the rotating speeds of up and down roller gears are stable. However,when the rotation direction of roller changes,the speed has an impact phenomenon. During the movement,the change trend of angular speed for up and down rollers is basically the same as that of the rotating oil cylinder. The research results provide theoretical basis for the optimization of transmission system structure of blade rolling mill.
引文
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[12]毛君,马玉春,谢苗.四辊轧机垂直振动特性研究及测试分析[J].锻压技术,2018,43(4):105-110.Mao J,Ma Y C,Xie M.Research and test analysis on vertical vibration characteristics of four roller rolling mill[J].Forging&Stamping Technology,2018,43(4):105-110.
[2]姜忠立,赵燕,李云峰.钛合金叶片冷轧工艺注意的几个问题[A].第四届中国航空学会青年科技论坛文集[C].北京:航空工业出版社,2010.Jiang Z L,Zhao Y,Li Y F.Problems that should be paid attention to in cold-rolled process of titanium blade[A].Proceedings of the Fourth Young Scientist and Technologist Forum of Chinese Society of Aeronautics and Astronautics[C].Beijing:Aviation Industry Press,2010.
[3]陈洪月,孟辉,毛君,等.模具安装误差对叶片辊轧精度的影响[J].热加工工艺,2014,43(5):120-125.Chen H Y,Meng H,Mao J,et al.Influence of die installation error on blade rolling accuracy[J].Hot Working Technology,2014,43(5):120-125.
[4]毛君,孟辉,陈洪月,等.叶片辊轧机高精度调整机构运动精度分析[J].机械设计与研究,2015,31(4):20-23,26.Mao J,Meng H,Chen H Y,et al.Kinematic accuracy analysis of high precision adjusting mechanism of blade rolling mill[J].Machine Design&Research,2015,31(4):20-23,26.
[5]毛君,张瑜,孟辉,等.间隙误差条件下辊轧机传动系统动态特性分析[J].机械科学与技术,2015,34(7):1011-1015.Mao J,Zhang Y,Meng H,et al.Dynamic characteristic analysis of rolling mill transmission system with clearance error[J].Mechanical Science and Technology for Aerospace Engineering,2015,34(7):1011-1015.
[6]毛君,张瑜,孟辉,等.高频周期位移激励下的叶片辊轧机振动特性研究[J].机械设计,2016,33(3):92-96.Mao J,Zhang Y,Meng H,et al.Research on vibration characteristic of blade rolling mill roller under high-frequency periodic displacement excitation[J].Journal of Machine Design,2016,33(3):92-96.
[7]Dong H J,Shen Y M.Investigation of rattling threshold in gear system[J].Chinese Journal of Mechanical Engineering,2005,18(4):571-574.
[8]Gao Z Y,Shen Y M,Liu X M.Periodic windows of nonlinear gear system based on symbolic dynamics[J].Chinese Journal of Mechanical Engineering,2006,19(3):434-438.
[9]刘浩然,张莹,时培明,等.基于动态轧制力的四辊冷轧机七自由度振动特性研究[J].振动与冲击,2015,34(22):98-102,120.Liu H R,Zhang Y,Shi P M,et al.Vibration characteristics of a cold rolling mill with a model of seven degrees of freedom and their influence on dynamic rolling force[J].Journal of Vibration and Shock,2015,34(22):98-102,120.
[10]时培明,夏克伟,刘彬,等.含间隙多自由度轧机传动系统非线性扭转动力特性[J].机械工程学报,2012,48(17):57-64.Shi P M,Xia K W,Liu B,et al.Dynamics behaviors of rolling mill's nonlinear torsional vibration of multi-degree-of-freedom main drive system with clearance[J].Journal of Mechanical Engineering,2012,48(17):57-64.
[11]时培明,夏克伟,刘彬,等.多自由度轧机传动系统非线性非主共振扭振特性[J].振动与冲击,2015,34(12):35-41.Shi P M,Xia K W,Liu B,et al.Non-main resonance characteristics of nonlinear torsional vibration of rolling mill's multi-degree-offreedom main drive system[J].Journal of Vibration and Shock,2015,34(12):35-41.
[12]毛君,马玉春,谢苗.四辊轧机垂直振动特性研究及测试分析[J].锻压技术,2018,43(4):105-110.Mao J,Ma Y C,Xie M.Research and test analysis on vertical vibration characteristics of four roller rolling mill[J].Forging&Stamping Technology,2018,43(4):105-110.