基于冲击模型的含间隙高速凸轮机构动力学分析

发布时间：2018-05-10 12:13

本文选题：含间隙高速凸轮机构 + 动力学模型　；参考：《食品与机械》2017年09期

【摘要】：为了提高含间隙高速凸轮机构动态性能。采用二状态冲击副模型模拟凸轮和从动件间的间隙,构建考虑阻尼的含间隙凸轮机构动力学模型。以摆线凸轮曲线为激振函数,采用有限差分法求解动力学方程。对含间隙动力学模型进行时域和频域分析,绘制相应的加速度时域和频域响应图谱,得出了阻尼比、周期比对动态响应的影响,并对常用的几种高速凸轮曲线进行动力学分析。得出:间隙存在会导致系统响应精度变差;间隙对从动件升程加速段的影响较小;对减速段和休止期影响较大;传统理论在间隙动力学中的应用存在局限性。
[Abstract]:In order to improve the dynamic performance of high speed cam mechanism with clearance. The clearance between cam and follower is simulated by two-state impulse pair model, and the dynamic model of cam mechanism with clearance considering damping is constructed. Using cycloidal cam curve as exciting function, the finite difference method is used to solve the dynamic equation. The time-domain and frequency-domain analysis of the dynamic model with clearance is carried out, and the corresponding time-domain and frequency-domain response charts of acceleration are plotted. The effects of damping ratio and period ratio on the dynamic response are obtained, and the dynamic analysis of several commonly used high-speed cam curves is carried out. It is concluded that the existence of clearance will lead to the deterioration of the system response accuracy; the clearance has less influence on the acceleration section of the follower lift; the greater influence on the deceleration phase and the rest period; and the limitation of the traditional theory in the application of clearance dynamics.
【作者单位】：江南大学江苏省食品先进制造装备技术重点实验室;
【分类号】：TH112.2

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