摘要
为研究拖拉机旋耕作业载荷对动力输出传动系振动特性的影响,采用系统动力学建模、台架试验验证、田间试验与仿真分析相结合的方法加以分析。首先,在分析动力输出传动系结构的基础上,建立了描述其载荷传递机理的扭振耦合空间动力学模型,此模型详细考虑了横向和垂向的齿轮啮合传递效应。其次,利用拖拉机PTO加载试验台对模型的仿真结果进行试验验证,验证结果表明:横向和垂向的啮合频率误差最大分别为4.24%和5.12%,满足建模要求。然后,搭建了由无线扭矩传感器、北斗定位系统等组成的作业数据采集系统,分别采集了拖拉机在L1(2.07 km/h)、L2(3.10 km/h)、L3(5.29 km/h)常用挡位下的田间旋耕作业数据,田间试验结果表明:旋耕作业的载荷水平和波动范围均随着作业挡位、行驶速度的升高而增大。最后,利用所建立的动力学模型仿真分析了不同作业挡位PTO负荷对齿轮传递特性的影响,结果表明:拖拉机旋耕作业挡位越高,由PTO载荷波动所引起的传动系振动位移越大,而且主要体现在横向振动。
In order to study the influence of tractor rotation tillage load on power take-off driveline,the system dynamics modeling,bench experiment verification,field test and simulation analysis were used.Firstly,based on the structure analysis of the power output driveline,a torsional vibration coupled spatial dynamics model was established to describe the load transfer mechanism.In this model,transverse and vertical transmission effects of gear meshing were considered in detail.Secondly,the tractor power take-off(PTO)loading experiment bench was used to verify the simulation results of the model.The verification results showed that the maximum lateral and vertical mesh frequency errors were 4.24%and 5.12%,respectively,which met the modeling requirements.Then,the data acquisition system composed of wireless torque sensor and BeiDou positioning system was built,and the data of rotary tillage operation in the field under L1(2.07 km/h),L2(3.10 km/h)and L3(5.29 km/h)were collected respectively.The results of the field test showed that the load level and fluctuation range of rotary tillage were increased with the increase of gear and driving speed.Finally,the influence of PTO load on gear transfer characteristics was simulated by using the established dynamic model.The results showed that the higher the tractor gear for rotary tillage operation,the greater the vibration displacement of power take-off driveline caused by the fluctuation of PTO load,which was mainly reflected in the lateral vibration.The above research provided theoretical model and data reference for durability design and load spectrum loading experiment of tractor power take-off driveline.
作者
邵雪冬
杨子涵
宋正河
刘江辉
苑伟
SHAO Xuedong;YANG Zihan;SONG Zhenghe;LIU Jianghui;YUAN Wei(College of Engineering,China Agricultural University,Beijing 100083,China;Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment,China Agricultural University,Beijing 100083,China;Luoyang Xiyuan Vehicle and Power Inspection Institute Co.,Ltd.,Luoyang 471000,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2022年第S01期332-339,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家重点研发计划项目(2017YFD0700301)
关键词
拖拉机
动力输出传动系
扭振耦合
齿轮传递效应
旋耕作业
载荷特性
tractor
power take-off driveline
torsional vibration coupling
gear transfer effect
rotary tillage operation
load characteristics
