跨式油茶果收获机履带底盘行走液压系统设计与试验  

Design and Experiment of Hydraulic System for Crawler Chassis of Straddle Type Camellia oleifera Fruit Harvester

作　　者：杜小强[1,2] 宁晨 杨振华 马锃宏 贺磊盈 韩鑫涛[1] DU Xiaoqiang;NING Chen;YANG Zhenhua;MA Zenghong;HE Leiying;HAN Xintao(School of Mechanical Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;Key Laboratory of Transplanting Equipment and Technology of Zhejiang Province,Hangzhou 310018,China;Longquan Guyuan Automation Equipment Co.,Ltd.,Longquan 323700,China)

机构地区：[1]浙江理工大学机械工程学院,杭州310018 [2]浙江省种植装备技术重点实验室,杭州310018 [3]龙泉市菇源自动化设备有限公司,龙泉323700

出　　处：《农业机械学报》2023年第3期139-147,共9页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点研发计划项目(2022YFD2202103);国家自然科学基金项目(31971798);浙江省“领雁”研发攻关计划项目(2022C02057);浙江省重点研发计划项目(2019C02065);浙江省151人才培养计划项目;浙江省高校中青年学科带头人培养项目。

摘　　要：跨式油茶果收获机在丘陵山地作业时需要较大的牵引力,且要求行走平稳。本文基于机液联合仿真技术对跨式油茶果收获机底盘行走液压系统进行设计,以达到动力匹配及行走性能较优的目的。在RecurDyn软件中建立了跨式收获机履带底盘虚拟样机模型,采用谐波叠加法构建了B级路面谱,仿真分析了跨式履带底盘直线行驶和差速转向的动力学特性。通过AMESim与RecurDyn软件对收获机行走系统进行机液联合仿真,研究底盘在直线行驶与差速转向工况时行走马达液压特性。研制了全液压驱动的跨式油茶果收获机,进行了地面直线行驶与差速转向测试,结果表明:底盘直线行驶偏移率为1.7%;直线行驶时,行走马达流量稳定在23 L/min,压力稳定在1.5 MPa;差速转向时,行走马达流量稳定在22 L/min,压力在2~12 MPa范围内波动,验证了跨式履带底盘行走液压系统的稳定性。Aiming at the problem of walking power and stability of the straddle Camellia oleifera fruit harvester,a set of chassis walking hydraulic system of the straddle Camellia oleifera fruit harvester with better power matching and walking performance was designed based on the mechanical-hydraulic co-simulation technology.The virtual prototype model of the straddle type crawler chassis was established in RecurDyn software,and the B-level road spectrum was constructed by using the harmonic superposition method.The dynamic characteristics of the crawler chassis in straight-line driving and differential steering were simulated and analyzed.The mechanical and hydraulic co-simulation of the traveling system of the crawler chassis was carried out to study the hydraulic characteristics of the traveling motor under straight-line driving and differential steering conditions by AMESim and RecurDyn software.A straddle type Camellia oleifera fruit harvester driven by four-wheel triangular crawler was manufactured,and the straight-line driving and differential steering tests on road were carried out.The deviation rate of the chassis straight-line driving was 1.7%.The flow rate of the traveling motor was stable at 23 L/min and the pressure was stable at 1.5 MPa when traveling along a straight line.The flow rate of the traveling motor was stable at 22 L/min,and the pressure was fluctuated within the range of 2~12 MPa during differential steering test.The results verified the stability of the traveling hydraulic system of the straddle type crawler chassis.

关 键 词：油茶果收获机 跨式履带底盘 液压系统 联合仿真 

分 类 号：S225.93[农业科学—农业机械化工程]