摘要
以同一轴线上双激振器驱动的振动磨机为典型研究对象,通过对其实际模型的合理简化,得到运动系统的力学模型。利用Lagrange方程建立了运动系统的动力学方程,通过对动力学方程的求解分析,得到了振动体的运动轨迹随两个激振器转角差的变化规律,振动体在运动过程中,随着两个激振器转角差的增大,振动体质心的运动幅值减小,而沿质心轴线两端的运动幅值增大,当两个激振器转角差达到180度时,质心运动幅值为零,沿质心轴线两端的运动幅值达到极大,此时振动系统产生锥形运动,使得振动设备无法正常工作。研究结果可为研究更复杂振动系统的同步运动和利用同步运动减少参振体质量提供理论基础。
A vibrating mill that is driven by double vibrators along the same axis is taken as a typical object.Its mechanical model is obtained reasonably simplifying the vibrating mill system.The dynamic equations governing its movement are established based on Lagrange equations.By solving the dynamic equations,the result reveals that the moving trajectory of the vibrating body is consistent with the difference between the two vibrators' angle.When the difference of the two vibrators' angle increases,the amplitude of the vibrating body's centroid declines whereas the amplitude of the two sides of the centroid axis increases.When the angle difference of two vibrators is 180 degrees,the amplitude of the mass center of the vibrating body is zero and the amplitude of the two sides of the centroid axis is the the largest.Under this extreme circumstance,a cone-shape movement emerges in the vibrating system disturbing its working.The result could provide a theoretical foundation for study on synchronous movement of more complex vibration systems and study on aiming to decrease the mass of vibration system by applying synchronous movement.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第6期7-10,共4页
Journal of Vibration and Shock
关键词
双激振器
振动体
同步运动
double vibrator
vibrating body
synchronous movement
