基于离散元法的螺旋喂料器流量计算修正

针对螺旋喂料器实际流量检测值与传统计算式计算值相差较大的问题,采用响应面试验对螺旋喂料器的流量计算式进行修正。考虑到实际试验的复杂性,采用离散元仿真流量值与计算式计算值的比值作为响应,以对流量比值影响显著的螺距、转速、管径为试验因素设计响应面试验,得到3个因素与响应值之间的二阶回归方程,由此进一步得到螺旋喂料器的流量计算式。为进一步验证修正后流量计算式的可行性,根据设计要求,用SolidWorks软件建立三维模型并进行仿真分析,发现仿真所得流量值为1.258t/h,与修正式计算所得流量值1.210t/h的误差为3.97%,表明了流量修正计算式的合理性。

Research on modification of flow calculation of screw feeder

For the problem that the actual flow detection value of the screw feeder differs greatly from the calculation value of the traditional calculation formula, an RSM eperimental design is used to modify the flow calculation formula of the screw feeder. Considering the complexity of the actual test, the ratio of the flow value measured by the discrete element simulation and the value calculated by the calculation formula is used as the response, and the RSM experimental design is designed by taking the screw pitch, speed, and pipe diameter that significantly affect the flow difference as the factors. The second-order regression equation between the factors and the response value, from which the flow calculation formula of the screw feeder is further obtained. In order to verify the feasibility of the flow calculation formula, the SolidWorks software was used to establish a three-dimensional model according to the design requirements, and the EDEM software was imported for discrete element simulation. The flow value obtained from the simulation was found to be 1.258 t/h. The error of the calculated flow value of 1.210 t/h with the correction formula is 3.97%, indicating the rationality of the flow correction calculation formula and providing a reference for the design calculation of the screw feeder.