摘
要
随着车辆动力技术的提高和车辆向高速、重载、自动化方向的发展， 车辆的安全性能受到了人们的普遍重视，从而对车辆制动系统的可靠性、 稳定性和操纵性提出了更高的要求，车辆制动装置的性能优劣直接关系到 车 辆 的机动性和行车安全。本论文针对一种新型 ZL80 装载机液力变矩器 进行了系统、深入地研究。 本文基于束流理论，建立了 ZL80 装载机液力变矩器在牵引工况和制 动工况的数学模型，对液力变矩器的原始特性和净外特性进行了理论计算 和分析，为研究该液力元件和发动机共同工作特性提供了理论依据。 本文基于 MATLAB 设计了 ZL80 装载机液力变矩器， 研究了该液力元件 在车辆下长坡连续制动工况和紧急制动工况的制动性能，从而使得液力制 动力得到充分利用，改善和提高了车辆的制动性能，实现了车辆的恒扭矩 制动。 基于以上分析，对新型 ZL80 装载机液力变矩器进行台架试验，可得 到该液力元件的原始特性、闭锁离合器闭锁过程充油动态特性和在此过程 中液力变矩器的动态性能、闭锁离合器结合充油动态特性。
关键词 ：ZL80 装载机液力变矩器；闭锁；液力减速器；束流理论；特性
ABSTRACT
Along with the improvement of vehicle dynamical technology and the development of vehicle to high speed, great burden and automatization. People attach importance to security of vehicle widely. Higher requests are put forward to reliability, stability and manipulability of vehicle brake systems. The excellent or coarseness of vehicle brake systems influences the flexibility and security of vehicle directly. This thesis aims to a new ZL80 loaders hydraulic torque converter system and in-depth research. Based on the beam theory, a ZL80 loaders hydraulic torque converter in traction condition and braking modes of the mathematical model,Of the converter's original characteristics and net external characteristics, theoretical calculation and analysis for the study of the hydraulic components and engine joint work characteristics provides theory basis. This paper was designed based on MATLAB ZL80 loaders hydraulic torque converter, studied the hydraulic components in vehicle for braking condition and long slope of the emergency brake conditions braking performance, thus make the hydraulic braking force can be fully used,To improve and enhance the vehicle braking performance and to realize the vehicle's constant torque braking. Based on the above analysis, the new ZL80 loaders hydraulic torque converter bench test, can get the hydraulic components of original characteristics, atresia clutch atresia process dynamic characteristic and oil filled in this process hydraulic torque converter dynamic performance, atresia clutch oil filled with dynamic characteristics.
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Key words : ZL80 loaders hydraulic torque converter; Atresia; Hydraulic reducer; Beam theory; charact.........................................................................................................