变量齿轮同步分流器的设计及特性仿真

发布时间：2018-06-18 16:05

本文选题：齿轮 + 同步机械　；参考：《农业工程学报》2017年14期

【摘要】：针对智能农业机械多执行机构同步动作、调速及变载荷恒速运动问题,提出一种变量齿轮同步分流器。分析了中心轮齿数和行星轮均布个数对同步状态的影响,得到各分流单元瞬时状态全部相同的工作条件是中心轮齿数能被行星轮均布个数整除,各分流单元瞬时同步。利用Fluent软件的动网格技术,对分流器流量特性进行非定常模拟,分析出不同中心轮齿数对平均流速和分流器体积的影响。研究了负载压力不变齿轮转速变化、负载压力变化齿轮转速不变、负载压力和齿轮转速均变化的工况下,瞬时流速和平均流速的变化规律。结果表明:行星轮和中心轮回转中心的连线与中心轮参与拟合轮齿的对称中心线重合误差为0.05?和0.1?时,6个出口瞬时流量误差分别为?0.56%和?1.12%;负载压力不变时,根据平均流速与齿轮转速的线性关系,通过伺服电机调节中心轮转速实现变量控制;负载压力变化时,伺服电机调节中心轮转速实现恒流控制,理论上实现了执行机构瞬时同步、调速或恒速动作,试验验证了恒流控制的可行性。
[Abstract]:A variable gear synchronous shunt is proposed to solve the problems of synchronous action, speed regulation and variable load constant speed movement of intelligent agricultural machinery. The effects of the number of center gear teeth and the number of planetary gear distribution on the synchronous state are analyzed. It is obtained that all the instantaneous states of each shunt unit are all the same working conditions: the number of teeth of the center wheel can be completely divided by the number of planetary gear distribution, and the instantaneous synchronization of each shunt unit is obtained. Using the moving grid technology of fluent software, the flow characteristics of the shunt are unsteady simulated, and the influence of the number of teeth on the average velocity and the volume of the shunt is analyzed. The variation of instantaneous velocity and average velocity is studied under the condition of constant load pressure change of gear speed, load pressure and gear speed change. The results show that the coincidence error of the symmetry center line between the planetary gear and the center rotation center and the center wheel participating in the fitting of the gear teeth is 0. 05? And 0.1? When the load pressure is constant, according to the linear relation between the average velocity and the gear speed, the variable control is realized by the servo motor adjusting the rotational speed of the center wheel, and when the load pressure changes, the instantaneous flow error is 0.56% and 1.12% respectively. The servo motor adjusts the speed of the center wheel to realize the constant current control, and theoretically realizes the instantaneous synchronization, speed regulation or constant speed action of the actuator. The feasibility of the constant current control is verified by the experiment.
【作者单位】：中国农业大学工学院;北京颐和中威精密机器有限公司;
【基金】：国家自然科学基金资助项目(51405494)
【分类号】：TH132.41

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