四轴水平振动输送机的物料速度仿真分析与实验

Simulation analysis and experiment of material velocity of four shafts horizontally vibrated conveyor

针对当前四轴水平振动输送机的物料速度随输送机偏心轴相位角变化规律不明确的问题,以某钢厂水平振动输送机的参数为基础,对机体与物料速度进行了理论推导和仿真分析。首先,推导了机体激振力与机体速度的通用公式,并对3种初始相位角对应的机体速度进行了仿真,分析了初始相位角对机体速度的影响规律;然后,对机体速度和物料速度进行了对比仿真,并研究了物料起始运动时间、初始相位角以及角频率对物料速度的影响规律;最后,采用仿真软件分析了固定高速轴(或低速轴)的初始相位角时,物料稳态平均速度随低速轴(或高速轴)相位角变化的规律,并对相关内容进行了实验验证。研究结果表明:输送机4个偏心轴以及齿轮等相关部件组装完成后,物料的稳态平均速度不随任一个偏心轴质心相位角的变化而变化;在输送机稳定运行时,物料的稳态平均速度与其加入料槽内的先后顺序无关;此外,针对某一机型的最佳物料速度,在高速轴(或低速轴)的初始相位角不同时,两种轴的相位角差也可能不同,单纯指定相位角差3π/4、π/2或3π/2等特定角度以利于物料输送的方案是不合理的,应该同时规定高低速偏心轴的相位角。

Aiming at the problem of the unclear law of the material velocity of the four shafts horizontally vibrated conveyor variation with the phase angle of the eccentric shafts of the conveyor,based on the parameters of a horizontally vibrated conveyor in a steel mill,the velocity of the body and material was theoretically derived and simulated.Firstly,the general formula of body exciting force and body velocity was derived,the body velocity corresponding to three initial phase angles was simulated,and the effect of initial phase angle on the body velocity was analyzed.Then,the effects of initial motion time,initial phase angle and angular frequency on body velocity and material velocity were studied.Finally,simulation software was used to analyze the changes of the steady-state mean velocity of the material with the phase angle of the low-speed shaft(or high-speed shaft)when the initial phase angle of high-speed shaft(or low-speed shaft)was fixed,and the relevant contents were verified by experiment.The research results indicate that after the four eccentric shafts and gear and other related parts of the conveyor are assembled,the steady-state average velocity of the material does not change with the change of the phase angle of the centroid of either eccentric shaft.When the conveyor runs stably,the steady-state average velocity of the material does not vary with the sequence of its addition into the tank.In addition,considering the optimal material velocity for a particular model,when the initial phase angle of high-speed shaft(or low-speed shaft)is different,the phase angle difference of the two shafts may also be different,it is not reasonable to simply specify a specific phase angle difference such as 3π/4,π/2 or 3π/2 that is beneficial to material transportation,but the phase angle of high and low speed eccentric shaft should be specified at the same time.