基于液压加载的拖拉机PTO测试装置设计与试验  

Design and Experiment of Tractor PTO Testing Device Based on Hydraulic Loading

作　　者：胡豪 张盼港 潘华磊 赵亚燊 周豫鸽 HU Hao;ZHANG Pangang;PAN Hualei;ZHAO Yashen;ZHOU Yuge(Luoyang Xiyuan Vehicle and Power Test Institute Co.,Ltd.,China Official Tractor Test and Evaluation Center,Luoyang Henan 471039,China)

机构地区：[1]洛阳西苑车辆与动力检验所有限公司,国家拖拉机质量检验检测中心,河南洛阳471039

出　　处：《农业工程》2024年第5期83-88,共6页AGRICULTURAL ENGINEERING

基　　金：洛阳市科技研发计划项目(202301030B)。

摘　　要：针对当前多数负荷车仅适用于拖拉机牵引试验测试,模拟完整田间作业状态不全面的现状,设计了一种可挂接负荷车的液压加载式拖拉机动力输出轴(PTO)测试装置,在满足负荷车牵引试验国家标准要求的基础上可以进行拖拉机PTO测试试验。该测试装置采用的液压测功机与应用普遍的直流电力测功机经过试验对比,系统响应和稳定速度更快,综合加载性能更好。对该测试装置进行拖拉机PTO田间转矩载荷谱模拟动态加载试验,结果表明,实际加载转矩与转矩载荷谱试验数据相关性良好,拟合优度0.83。数据分析得出,计算实际液压加载系统响应时间约2.1 s,最大超调量7.52%,均在可控范围内,说明该测试设备可以通过输入转矩载荷谱的形式有效模拟田间作业拖拉机PTO工作状态,为后续拖拉机牵引及转矩全面加载田间模拟试验提供参考。A hydraulic loading tractor power take-off(PTO)output shaft testing device with attachable load trailer was designed to address current situation where most load trailers were only suitable for tractor traction testing,which did not fully simulate complete field operation status.This device enabled tractor PTO testing while meeting requirements of national standard for load trailer traction testing.Compared to commonly used DC power dynamometers,hydraulic dynamometer used in this device exhibited faster system response and more stable speed,resulting in better overall loading performance.Dynamic loading tests simulating torque load spectrum of tractor PTO field operation were conducted using this testing equipment.Results showed a good correlation between actual loading torque and test data from torque load spectrum,with a goodness of fit of 0.83.Through data analysis,actual response time of hydraulic loading system was calculated to be approximately 2.1 s,with a maximum overshoot of 7.52%,both within controllable ranges.By inputting torque load spectrum,this testing equipment could effectively simulate working status of tractor PTO in field operations,providing reference for subsequent comprehensive field simulation tests on tractor traction and torque loading.

关 键 词：拖拉机 液压加载 动力输出轴 负荷车 转矩载荷谱 

分 类 号：S219[农业科学—农业机械化工程]