摘要
为保护果品和提高运输的效率,研究设计一种适用于山地果园轮式运输机的L型拉臂式自装卸装置并进行仿真分析。采用传统图解法对L型拉臂进行受力分析,得出在两个运动过程中主要部位的受力通用公式,结合运输机参数得出拉臂在两个运动过程的临界角为38°。通过ADAMS得到拉臂主要部位所受的力与旋转角度之间的关系,得出在4种情况下:坡度为-20°及拉臂旋转0°、坡度为20°及拉臂旋转38°、坡度为-20°及拉臂旋转134°、坡度为-20°及拉臂旋转38°,拉臂受力较大。通过ANSYS得出拉臂的应力范围为0.070~307.144MPa,小于钢材Q345的抗拉强度470 MPa。满足在坡度为15°和载荷为150kg的工况下完成自装卸的设计要求。
In mountainous orchard of southern China,currently the self-loading devices with the L-type pull arm were mostly put into use in leveling roads with large volume which is not suitable for the mountainous region.In order to protect the fruits and improve the transport efficiency,a self-loading device with the L-type pull arm in mountainous orchard transporter was designed,and simulations were conducted.The stress of the L-type pull arm was analyzed with the traditional graphical method to calculate the formula of main mechanical stress in the course of two campaigns,and the critical angle was38°.Getting the relation between the main part of power and the rotation angle by ADAMS.Results indicated that there were four cases regarded as dangerous conditions:slope of-20°and rotation angle of pull arm of 0°,slope of 20°and rotation angle of pull arm of 38°,slope of-20°and rotation angle of pull arm of 134°,slope of-20°and rotation angle of pull arm of 38°.Results of ANSYS finite element analysis declared that most of stress of the pull arm was in the range of 0.07-68.316 MPa.The maximum stress was 307.144 MPa,less than 470 MPa of the steel Q345's minimum tensile strength.This design has met the demand to complete the requirements of loading and unloading on the working conditions that the slope of 15°and the load of 150 kg.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2016年第4期113-120,共8页
Journal of Huazhong Agricultural University
基金
公益性行业(农业)科研专项(201203016
201403036)
广东省科技计划项目(2014A070713032)
惠州市产学研结合项目(2013B050013015)
