摘要
【目的】针对高地隙喷雾机重心高、稳定性差的问题,研究分析高地隙喷雾机的翻倾稳定性,探究提高机具翻倾稳定性的方法.【方法】以3WPZ-500型水旱两用高地隙喷雾机为研究对象,利用空间力系平衡原理建立力学模型,得到纵向、横向、合成坡道上极限翻倾角的计算公式;进行了重心位置测量试验和整机翻倾试验,明确重心位置变化对极限翻倾角的作用,同时验证力学模型的正确性.【结果】高地隙喷雾机翻倾稳定性的影响因素为重心坐标(a,e,H)、轴距L、轮距B以及视机型而定的最小单侧支反力F_t,评价指标为纵向极限翻倾角α_1和横向极限翻倾角β_1.纵向、横向极限翻倾角理论值分别为36.5°～41.5°和25.6°～26.8°,测量值分别为32.0°～36.1°和24.6°～25.2°,且变化趋势相同.分别针对重心坐标e、H和轮距B给出提高横向稳定性的措施.【结论】本研究结果可为高地隙机具的设计和改良提供理论依据.
【Objective】The overturning stability of the high-clearance sprayer was studied and analyzed in order to solve the problem of the high center of gravity caused poor stability.Combining with the exploration process,the approaches for improving the overturning stability were provided.【Method】The 3WPZ-500 type high-clearance sprayer for paddy and dry land was used and the mechanical model was established by using the balance principle of space force system.The formulas for calculating the extreme overturning angle on longitudinal direction,lateral direction and synthetic ramp were obtained.The centerof-gravity position measurement test and the overturning test of the whole machine were performed to clarify the effect of the position change of the gravity center on the extreme overturning angle,and at the same time to verify the correctness of the mechanical model.【Result】The factors affecting the overturning stability of the high-clearance sprayer were the center of gravity coordinates(a,e,H),the wheelbase L,thetrack width B,and the minimum unilateral support reaction Ft.The evaluation index was the longitudinal extreme overturning angle α1 and lateral extreme overturning angle β1.The theoretical values of the longitudinal and lateral extreme overturning angle were 36.5° to 41.5°and 25.6° to 26.8° respectively,and the measured values were 32° to 36.1°and 24.6° to 25.2°respectively,and the change trends were the same.The approaches for improving the lateral stability were provided for the center of gravity coordinates e,H and the track width Brespectively.【Conclusion】The research results could provide a basis for the design and improvement of high-clearance equipment.
作者
洒西静
吴梦阳
冯超
肖茂华
邱威
SA Xi-jing;WU Meng-yang;FENG Chao;XIAO Mao-hua;QIU Wei(Engineering College of Nanjing Agricultural University,Key Laboratory of Intelligent Agriculture Equipment in Jiangsu Province,Nanjing 210031,China;Guanyun Institute of Modern Agricultural Equipment of Nanjing Agricultural University,Lianyungang 222200,China)
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2018年第6期221-230,共10页
Journal of Gansu Agricultural University
基金
江苏省“六大人才高峰”项目(2015-ZBZZ-011)
江苏省农业科技自主创新资金(CX(17)1002)
南京农业大学SRT计划基金(1730B33).
关键词
高地隙喷雾机
翻倾稳定性
力学模型
翻倾试验
high-clearance sprayer
overturning stability
mechanical model
overturning test
作者简介
第一作者:洒西静,本科生.E-mail:saxijing@163.com;通信作者:邱威,副教授,硕士生导师,研究方向为农业机械装备.E-mail:qiuwei@njau.edu.cn
