荔枝去核机刀轴的优化设计与仿真  

Optimization Design and Simulation of Cutter Shaft of Pitting Machine for Litchi Fruit

作　　者：王旭东[1] 

机构地区：[1]仲恺农业工程学院机电工程学院,广州市510225

出　　处：《中国农机化》2011年第5期124-129,共6页Chinese Agricul Tural Mechanization

基　　金：广东省农业厅资助项目--灯笼状荔枝果肉获取设备的研制(粤财农[2007]368)

摘　　要：刀轴是荔枝去核机的核心部件。刀轴的往复运动对机构造成冲击,滑槽的单边受力使刀轴过度偏磨。针对这一问题对刀轴进行了运动学和动力学分析,建立了刀轴优化设计的数学模型,并利用MATLAB软件进行优化设计,确定出刀轴的最小质量为0.6421kg(比原质量减轻10.07%)、最佳滑槽升角为38.38°。用Pro/ENGINEER软件建立了结构参数优化后的刀轴模型,并进行了静态载荷仿真。试验表明,滑槽的支反力随刀轴转速和滑槽升角的增大而增大,与理论结果吻合。优化后的结构参数和仿真结果对荔枝去核机的改进设计提供了依据。In order to obtain lantern shape litchi flesh, a pitting machine was devised and made. Cutter shaft is one of the most important part of the machine and its reciprocating motion cause impact load on the machine. Unilateral load on the surface of the groove result in excessive wear of the cutter shaft. In view of the above problem, dynamic characteristics and the optimum design model of the cutter shaft are established. Used nonlinear of MATLAB optimization toolbox, the best structure parameters of the cutter shaft were calculated. The results are： （1） minimum mass of the shaft is 0.6421 kg, which is lighter 10.07% than before; （2） the best spiral angle of the groove is 38.38°. 3D models of the cutter shaft of optimization structure were built and their kinematics simulation were made by using Pro/ENGINEER software. Tests results consistent with the theoretical results, they show that the more rotate speed and spiral angle of the groove are, the higher press on the surface of the groove bears. The above results provide basis for improved design of the pitting machine for litchi fruit.

关 键 词：刀轴 优化设计 计算机仿真 

分 类 号：S226[农业科学—农业机械化工程] TH122[农业科学—农业工程]