丘陵山区履带式作业机全向调平系统设计与性能试验  

Design and performance test of the omnidirectional leveling system for crawler work machine in hilly areas

作　　者：蒋俞 孙泽宇[2] 汪若尘[1] 夏长高[1] 叶青[3] 郭逸凡 JIANG Yu;SUN Zeyu;WANG Ruochen;XIA Changgao;YE Qing;GUO Yifan(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,China;School of Agricultural Engineering,Jiangsu University,Zhenjiang 212013,China;Automotive Engineering Research Institute,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013 [2]江苏大学农业工程学院,镇江212013 [3]江苏大学汽车工程研究院,镇江212013

出　　处：《农业工程学报》2023年第18期64-73,共10页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金青年项目(52102459);江苏省青年基金项目(BK20200909);江苏大学农业装备学部项目(NZXB20210101)。

摘　　要：针对丘陵山区农业机械作业时机身倾角变化大,工作品质和安全性较差的问题,该研究设计了一种履带式作业机全向调平系统。首先,提出了基于“三层车架”的铰接式全向调平系统结构方案,给出了调平系统液压回路与工作原理。其次,进行了全向调平性能关于关键结构参数的敏感度分析。并在此基础上,以调平系统关键结构参数为优化变量,液压油缸平均推力和调平时间为优化目标,设计了多目标遗传算法优化关键结构参数。然后,建立了全向调平整机倾翻模型,通过分析履带式作业机静态极限横向倾翻角、静态纵向极限倾翻角以及动态极限行驶速度验证整机倾翻稳定性。与未调平履带式作业机相比,调平后的作业机静态横/纵向极限倾翻角分别提高了7.1%和13.5%,动态极限行驶速度提高了3.4%。最后,进行了履带式作业机全向调平性能试验。结果表明,静态试验下,履带式作业机横向和纵向调平时间为分别3.4和3.6 s;动态试验下,全向调平履带式作业机能够明显减小最大机身倾角,并迅速调平,在平地路面以及完成调平后的机身倾角能够保持在±1.5°以内,满足丘陵山区性能需求,验证了全向调平系统的工作有效性。Stability of body inclination,work quality and safety can be required during agricultural machinery operation in hilly and mountainous areas.In this study,an omnidirectional leveling system was designed for the crawler work machine.A structural scheme was also proposed with an articulated omnidirectional leveling system using a“three-layer frame”.The leveling hydraulic circuit was provided for the working principle of the omnidirectional leveling system.Secondly,a sensitivity analysis was conducted on the omnidirectional leveling performance,including the key structural parameters L_(AE),L_(BC),L_(CD),L_(HO),L_(IJ),and L_(IJ).The results showed that the displacement of the lateral leveling cylinder increased with the increase of L_(AE) and L_(CD),whereas,decreased with the increase of L_(BC).The displacement of the longitudinal leveling cylinder increased with the increase of L_(JK) and L_(IJ),while decreasing with the increase of L_(HO).The average thrust of the lateral leveling hydraulic cylinder decreased with the increase of L_(AE) and L_(CD),but the leveling time increased.By contrast,the average thrust of the longitudinal leveling hydraulic cylinder increased with the increase of L_(JK),but the leveling time decreased.A multi-objective genetic algorithm(GA)was designed to optimize the key structural parameters,taking the key structural parameters of the omnidirectional leveling system as the optimization variables,and the average thrust of the hydraulic cylinder and leveling time as the optimization objectives.Then,the overturning model was established for the omnidirectional leveling crawler work machine.The overturning stability of the whole machine was verified to analyze the static lateral limit overturning angle,static longitudinal limit overturning angle,and dynamic limit driving speed of the crawler work machine.The lateral and longitudinal limit overturning angles of the unleveled crawler work machine were 43.6°,and 60.7°,respectively,whereas,they were 46.7°,and 68.9°,respectively,after leve

关 键 词：设计 试验 丘陵山区 履带式作业机 全向调平 

分 类 号：S232.3[农业科学—农业机械化工程]