为研究和开发高效振动式破碎机,针对所研究的冲击振动破碎系统建立单边动力学模型,利用牛顿定律建立振动微分方程,进行动力学分析.通过作出幅频曲线、滞回冲击力曲线、能量吸收曲线,分析其对系统响应的影响.利用所得结论用数值分析法解出此系统受迫主共振,求得位移、速度及加速度的时间历程,说明质量块的运动并非简单的简谐运动,非线性冲击力是振动系统中影响较大的一个因素;得到间隙、激振频率对幅频曲线、冲击力和能量吸收的影响规律.研究表明,物料与破碎头之间的间隙值应尽量小,以用更小的激振力达到更好的破碎效果,且系统工作在主共振区时可获得大的冲击力.研究结果为深入分析振动系统的规律及机制提供了参考.%To research and develop efficient vibrating type crusher,a single-sided dynamic model is established for the impact and vibration crushing system,and the differential equation of vibration is set up with Newton's law for dynamic analysis.By making amplitude frequency curve,hysteretic impact force curve and energy absorption curve,the influence of which on the system response is analyzed.Based on the conclusion and using numerical method,the primary forced resonance of the system is calculated,and the time history of displacement,velocity and acceleration is obtained,showing that the motion mass movement is not a simple harmonic motion,the nonlinear impact force is one of the factors that influences the vibration system,and the influence rules of clearance,vibration frequency on the amplitude frequency curve,impact force and energy absorption are also obtained.The gap between the material and the broken head should be kept as small as possible so as to achieve a better crushing effect with a smaller excitation force,and the system is best to work in the main resonant area to get a big impact.The research result provides reference for further study of rules and mechanism of the vibration systems.
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