摘要
针对高秆禾草收获机在南方山坡地带作业易发生倾翻的问题,设计了防倾翻预警系统。该系统主要由上位机、控制器和传感器组成,通过倾角传感器和压力传感器共同监测,实现防倾翻预警功能。对整机质心进行了测量,测得整机质心与驱动轮轴之间的水平距离为944.5 mm、质心高度为1080.4 mm、质心与纵向中心平面的距离为27.9 mm,确定了质心位置;利用软件RecurDyn对整机在7.2 km/h车速下进行了典型工况的动力学仿真分析,横向直行、转向和纵向上下坡的临界倾翻角分别为24°、11°、33°和31°,其中在转向工况下,临界倾翻横向载荷转移率为0.49;对整机进行了静态倾翻试验,横向直行和纵向上下坡的临界倾翻角分别为24.7°、34.2°和31.8°;基于整机尺寸和质心位置搭建了比例模型,在固定转向路径下进行了动态倾翻试验,试验结果表明:转向临界倾翻角为14°,临界倾翻横向载荷转移率为0.54,为高秆禾草收获机应用于复杂工况的行驶作业提供了理论支持。
Aiming to solve the problem of that the high-stalk grass harvester was prone to tipping when operating on the southern mountain slopes,an anti-tip warning system was designed.The system was mainly composed of a host computer,a controller and sensors.Through the joint monitoring of the inclination sensor and the pressure sensor,the anti-tip warning function was realized.The center of mass of the whole machine was tested.The horizontal distance between the center of mass of the whole machine and the drive wheel shaft was 944.5 mm.The height of the center of mass was 1080.4 mm.The distance between the center of mass and the longitudinal center plane was 27.9 mm.The position of the center of mass was determined.The software RecurDyn was used to perform the dynamic simulation analysis of the whole machine under typical working conditions at a speed of 7.2 km/h.The critical tipping angles for horizontal straight,turning and longitudinal up and down slopes were 24°,11°,33°and 31°.Under the turning conditions,the critical tipping lateral load transfer ratio was 0.49.A static tipping test was performed on the whole machine.The critical tipping angles for horizontal straight and longitudinal up and down slopes were 24.7°,34.2°and 31.8°.Based on the size of the whole machine and the position of the center of mass,a scale model was built.A dynamic tipping test was performed under a fixed steering path.The test results showed that the critical tipping angle of steering was 14°and the critical tipping lateral load transfer ratio was 0.54.The research can provide theoretical support for high-stalk grass harvesters applied to operations under complex working conditions.
作者
黄韶炯
刘文
班超
王中豪
尤泳
赵建柱
HUANG Shaojiong;LIU Wen;BAN Chao;WANG Zhonghao;YOU Yong;ZHAO Jianzhu(College of Engineering,China Agricultural University,Beijing 100083,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2022年第1期133-139,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家重点研发计划项目(2016YFD0701705)。
关键词
牧草履带收获机
山坡地
动力学仿真
倾翻预警
forage grass crawler harvester
hillside
dynamic simulation
tipping warning
