保育猪饲喂器设计与排料性能试验

为促进我国生猪养殖业的规模化发展,改善保育猪饲喂器排料均匀性及单位时间内排料量,在保证饲料以整体流方式排料的情况下,设计了一种保育猪饲喂器。阐述了总体结构组成和工作原理,对出料口盘和排料拨片进行了动力学与运动学分析。以影响饲喂器排料性能的主要因素为试验因素,以饲喂器排料均匀性指标变异系数和排料能力指标流量为评价指标,应用EDEM软件进行虚拟正交试验,并基于Design-Expert 8.0.10软件对模型进行多目标优化获得最优参数组合,结果表明:当主轴转速、出料口直径、斗壁倾角和充满系数分别为45 r/min、110 mm、65°和65%时,变异系数和流量分别为3.96%和165.93 g/s。依据以上优化参数研制饲喂器,并经试验表明:颗粒饲料流动方式为整体流;变异系数为3.62%,流量为149.13 g/s,饲槽内颗粒饲料分布均匀且排料效率较高。

Design and Experiment of Discharging Performance of Feeder for Nursery

As we all know, China is one of the famous country for swine. with the development of pig breeding industry, it is important to improve feed-discharging uniformity and sufficient flow in unit time of feeders. A new type of feeder for nursery was designed based on characteristics of mass flow. The principal factors which affected the discharging performance of the feeder were determined through comprehensive analysis. In order to optimize the structural and operating parameters of the designed nursery pig feeder, virtual orthogonal test was carried out by discrete element method software with rotational speed, discharge opening diameter, angle of conical wall of the hopper and filling coefficient as experimental factors and coefficient of variation and flow as evaluation indexes. Based on experimental data, a mathematical model was built by using the Design-Expert 8.0.10 software, and the optimum parameters were obtained. The simulation experiment results showed when rotational speed was 45r/min, discharge opening diameter was 110mm, angle of conical wall of the hopper was 65°, and filling coefficient was 65%, coefficient of variation was 3.96% and flow was 165.93g/s. Then the feeder was designed according to above optimized parameters, and the experiment was done. The results showed that the flow pattern of pelleted feed was mass flow;the relative error of coefficient of variation and the flow was 4.14% and 3.92%, respectively. The results were basically consistent with the simulation optimization, and the designed feeder can meet the feeding needs of nursery pig, which can ensure the quality and efficiency of the operation and provide support for the research and development of pig feeders.