采棉机液压机械无级变速器试验台设计与试验

Design and Test of the Hydraulic Mechanical Stepless Transmission Test Bench for Cotton Picker

设计了一种满足中大型采棉机行驶需求的液压机械无级变速器试验台,完成了各部分设计及搭建,并进行了相关试验。基于液压机械无级变速器工作原理和传动特性,针对自主研发的分矩汇速等差多段式液压机械无级变速器,提出试验台整体设计方案,确定试验台各装置组成,设计试验台动力负载部分、测控人机交互部分与传动固定部分,并进行相应试验。结果表明:液压机械无级变速器试验台运转平稳,能够实现液压机械无级变速器参数测试,转速和负载的变化与换段时速度下降幅度呈正相关。研究可为采棉机液压机械无级变速器试验台的设计与试验提供理论依据。

This article aims to design a hydraulic-mechanical CVT test bench that meets the driving needs of medium and large cotton pickers,complete the design and construction of each part,and conduct related tests.Based on the working principle and transmission characteristics of the hydraulic-mechanical continuously variable transmission,the self-developed multi-stage hydraulic-mechanical continuously variable transmission with split-differential speed is proposed,the overall design plan of the test bench is proposed,the composition of each device of the test bench is determined,and the power load part of the test bench is designed,Measure and control the human-computer interaction part and the fixed part of the transmission,and conduct corresponding tests.The results show that the hydraulic-mechanical continuously variable transmission test bench runs smoothly,and can test the parameters of the hydraulic-mechanical continuously variable transmission.The changes in speed and load are positively correlated with the speed drop during the shift.It provides a theoretical basis for the design and test of the hydraulic mechanical CVT test bench for cotton pickers.