重型卡车液力机械传动特性分析与动力学建模  

Characteristic Analysis and Dynamic Modeling of Hydraulic Mechanical Transmission for Heavy Truck

作　　者：李志国 LI Zhi-guo(Auto Repair Workshop of Harwusu Equipment Maintenance Center of Guoneng Zhuneng Group Co.,Ltd.,Erdos 010300,China)

机构地区：[1]国能准能集团有限责任公司哈尔乌素设备维修中心,内蒙古鄂尔多斯010300

出　　处：《液压气动与密封》2023年第2期55-60,共6页Hydraulics Pneumatics & Seals

基　　金：内蒙古自治区自然科学基金(2021MS05045)。

摘　　要：重型卡车作为工程机械车辆最常用的一个种类,其液力机械无级变速器影响着整车的使用性能和作业效率。准确分析重型卡车液力机械传动特性与动力学特性,能够提高其燃油经济性和传动效率。国内在车辆液力机械传动方面已经开展了大量的研究,但是对重型车辆的相关特性研究较少。该文对重型卡车液力机械传动特性展开分析,并对其进行动力学建模。通过变量泵和定量马达构建重型卡车的液压单元,在这种液压单元下,将液力机械无级变速器分为HM1、HM2、HM3以及HM4四段无级变速段,分别分析每段的传动特性,得出对应段的传动比;动力学建模从空气动力学以及悬架多体动力学两方面入手,计算每种动力学车身和车架受到的作用力,获取重型卡车的动力学模型。测试实验可知:液力机械的无级变速器传动具有提高卡车效率的特性,且构建的动力学模型精度高,具有广泛的适用性。Heavy truck is one of the most commonly used types of construction machinery vehicles,and its hydro mechanical continuously variable transmission affects the use performance and operation efficiency of the whole vehicle.Accurate analysis of hydraulic mechanical transmission characteristics and dynamic characteristics of heavy trucks can improve their fuel economy and transmission efficiency.A lot of research has been carried out on vehicle hydromechanical transmission in China,but there is little research on the relevant characteristics of heavy vehicles.In this paper,the hydraulic mechanical transmission characteristics of heavy trucks are analyzed,and its dynamic modeling is carried out.The hydraulic unit of heavy truck is constructed by variable displacement pump and constant displacement motor.Under this hydraulic unit,the hydraulic mechanical stepless transmission is divided into four stepless speed change sections:HM1,HM2,HM3 and HM4.The transmission characteristics of each section are analyzed respectively,and the transmission ratio of the corresponding section is obtained;Dynamic modeling starts with aerodynamics and suspension multi-body dynamics,calculates the force on each dynamic body and frame,and obtains the dynamic model of heavy trucks.The test experiment shows that the hydro mechanical CVT transmission has the characteristics of improving the efficiency of trucks,and the dynamic model built has high accuracy,which has a wide range of applicability.

关 键 词：重型卡车 液力机械 传动特性分析 动力学建模 无级变速器 

分 类 号：TH137[机械工程—机械制造及自动化] TP242[自动化与计算机技术—检测技术与自动化装置]