基于间隙铰的锤片式粉碎机锤销接触力研究
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摘要
为了探究在锤片式粉碎机锤销间隙及转子转速对锤销间接触力的关系,以锤片和销轴为研究对象,在考虑锤销铰间间隙摩擦的条件下,结合等效弹簧阻尼模型来构建锤销间隙铰模型。运用ADAMS对锤片式粉碎机锤销间隙铰模型进行仿真分析,仿真结果表明:在转子启动加速过程中,锤销间接触力出现冲击波动现象,锤销间碰撞程度随锤销间隙及转子转速的增大而增大;转子转速稳定后,在重力场及离心惯性力场耦合作用下,随锤销间隙及转子转速的增大,锤销间接触力波动与转速同频且幅值减小。仿真研究结果对研究锤片动力学及锤片运动稳定性有重要参考价值。
In order to study the effect of the clearance between hammer and pin and rotor speed on the contact force between hammer and pin in hammer mill, hammer and pin are studied in consideration of friction of the clearance between hammer and pin. The model of clearance joints is built combining the model of equivalent spring damping, and then ADAMS is adopted to conduct simulation analysis on this model. The simulation results show that during the process of rotor start-up, the contact force fluctuates, and the collision degree between hammer and pin increases with the increase of the clearance between hammer and pin and the rotor speed. After the rotor speed is stable, under the coupling of the gravity field and the centrifugal inertial force field, the contact force fluctuation and the rotational speed of the hammer pin decrease with the increase of the hammer pin and the rotor speed. The simulation results have important reference value for studying hammer dynamics and hammer motion stability.
In order to study the effect of the clearance between hammer and pin and rotor speed on the contact force between hammer and pin in hammer mill, hammer and pin are studied in consideration of friction of the clearance between hammer and pin. The model of clearance joints is built combining the model of equivalent spring damping, and then ADAMS is adopted to conduct simulation analysis on this model. The simulation results show that during the process of rotor start-up, the contact force fluctuates, and the collision degree between hammer and pin increases with the increase of the clearance between hammer and pin and the rotor speed. After the rotor speed is stable, under the coupling of the gravity field and the centrifugal inertial force field, the contact force fluctuation and the rotational speed of the hammer pin decrease with the increase of the hammer pin and the rotor speed. The simulation results have important reference value for studying hammer dynamics and hammer motion stability.
引文
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[14]时兵,金烨.面向虚拟样机的机构间隙旋转铰建模与动力学仿真[J].机械工程学报,2009,45(4):299-303.
[15]赵武云,史增录,戴飞,等.ADAMS2013基础与应用实例教程[M].北京:清华大学出版社,2015.
[16]刘宝,宗力,张东兴.锤片式粉碎机空载运行中锤片的受力及运动状态[J].农业工程学报,2011,27(7):123-128.(编辑黄荻)
[2]TIAN Q,LIU C,MACHADO M,et al.A new model for dry and lubricated joints with clearance in spatial flexible multibody systems[J].Nonlinear Dynamics,2011,64(2):25-47.
[3]刘宝.锤销摩擦对锤片式粉碎机转子振动影响的研究[D].武汉:华中农业大学,2006.
[4]李运初,王魁.基于ADAMS的含运动副间隙破碎机动力学仿真分析[J].机械传动,2011(10):1-3.
[5]杨义勇,金德闻.机械系统动力学[M].北京:清华大学出版社,2009.
[6]MUKRAS S,KIM N H,MAUNTLER N A,et al.Comparison Between Elastic Foundation and Contact Force Models in Wear Analysis of Planar Multibody System[J].Journal of Tribology,2010,132(3):1-11.
[7]白争锋.考虑铰间间隙的机构动力学特性研究[D].哈尔滨:哈尔滨工业大学,2011.
[8]黄平,郭丹,温诗铸,等.界面力学[M].北京:清华大学出版社,2013:19-21.
[9]朱巨才.含间隙机构的动力学建模与求解方法研究[D].湘潭:湘潭大学,2004.
[10]司振九.含多运动副间隙破碎机工作机构动力学研究[D].包头:内蒙古科技大学,2015.
[11]谢瑞清.锤片式粉碎机动态特性研究[D].南京:南京理工大学,2008.
[12]白争锋,赵阳,田浩.含铰间间隙太阳帆板展开动力学仿真[J].哈尔滨工业大学学报,2009(3):11-14.
[13]阎绍泽,陈鹿民,季林红,等.含间隙铰的机械多体系统动力学模型[J].振动工程学报,2003(3):36-40.
[14]时兵,金烨.面向虚拟样机的机构间隙旋转铰建模与动力学仿真[J].机械工程学报,2009,45(4):299-303.
[15]赵武云,史增录,戴飞,等.ADAMS2013基础与应用实例教程[M].北京:清华大学出版社,2015.
[16]刘宝,宗力,张东兴.锤片式粉碎机空载运行中锤片的受力及运动状态[J].农业工程学报,2011,27(7):123-128.(编辑黄荻)