摘要
针对现有甘蔗割铺机存在转弯半径大、道路适应能力差、难适应丘陵地区地形等问题,采用麦弗逊悬架和前置液压助力转向相结合的方式,设计了一种具有高机动性的甘蔗割铺机转向系统。为了适应丘陵山地甘蔗收割作业条件,对传统麦弗逊悬架进行改造。在此基础上,建立了转向系统数学模型,通过遗传算法优化转向油缸在机架上的安装位置,使其满足阿克曼转向。然后,根据Bekker理论以及Hegedus的推土阻力估算理论分析了轮胎受力情况,并计算了转向力矩,为转向油缸选型提供依据。试验结果表明:甘蔗割铺机满足转向设计要求,最小转弯半径为2.84m;并且左前轮转向角与右前轮转向角的跟随误差均小于3.00°,试验最大转向跟随误差为2.77°,验证了麦弗逊悬架在甘蔗割铺机上的适用性及其设计的液压助力转向系统的实用性。
There exist the problems for the sugarcane harvester,such as large turning radius,poor adaptability to the hilly road and terrain.To improve the efficiency of the sugarcane harvester,a steering system of sugarcane harvester was proposed by combining MacPherson suspension with front hydraulic power steering.The traditional MacPherson suspension was modified to adapt to the working conditions of sugarcane harvesting in hilly areas.On this basis,the mathematical model of steering system was established,and the installation position of steering cylinder on the suspension was optimized with genetic algorithm to meet the Ackerman steering.Then,according to Bekker theory and Hegedus bulldozing resistance estimation theory,the tire stress was analyzed and the steering torque was calculated,which provided a basis for the selection of steering cylinder.The test results showed that the sugarcane harvester met the design requirements of the steering,with the minimum turning radius 2.84 m,the following errors of steering angles of both the left front wheel and the right front wheel less than 3.00°,and the maximum steering following error 2.77°.The research verifies the applicability of the MacPherson suspension to the sugarcane harvester and the practicability of the proposed hydraulic power steering system.
作者
吕攀
高巧明
糜泽荣
李宗鹏
罗悦洋
LYU Pan;GAO Qiaoming;MI Zerong;LI Zongpeng;LUO Yueyang(Innovation Research Center for Hilly and Mountainous Farming Mechanization and Intelligent Equipment(Guangxi University of Science and Technology),Liuzhou 545616,China)
出处
《广西科技大学学报》
CAS
2024年第3期91-98,106,共9页
Journal of Guangxi University of Science and Technology
基金
中央引导地方科技发展资金项目(桂科ZY22096023)资助。
