08-32捣固车静液压传动行走系统的研究

【作者】 王弦；

【导师】 胡军科；

【作者基本信息】 中南大学 ， 车辆工程， 2008， 硕士

【摘要】 08-32捣固车采用封闭线路作业模式,为保证铁路的畅通,严格限定了作业时间。故为保证生产任务的按时完成,捣固车不但应具有良好的区间行驶性能,以减少车辆到达施工现场的非作业时间,还应具备稳定的作业行驶性能,以保证作业质量和效率。液力机械传动在车辆领域应用广泛,它能使车辆具备较好的高速区间行驶性能,但由于缺乏固定速比,不能满足捣固车作业时车速稳定的要求。静液压传动能准确调速,可保证作业时车速的稳定,但传统观念认为静液压传动不适合应用于车辆高速行驶领域。故现有08-32捣固车采用液力机械和静液压两套传动系统来分别实现车辆的区间运行和作业运行,其系统结构复杂,效率也不高,且在传动系统设计中存在缺陷,致使车辆车轴齿轮箱经常损坏。本文为08-32捣固车设计了一套新型静液压传动系统,能同时满足捣固车的区间运行和作业运行两种工况,突破了静液压传动不适用于车辆高速行驶领域的瓶颈。本文主要完成的工作如下:1.详细分析了现有08-32捣固车行走传动系统的工作原理,并通过试验分析证实了该车作业行走传动系统的设计缺陷。同时论述了静液压传动应用于08-32捣固车行走系统的合理性;2.设计了08-32捣固车静液压传动行走系统。对元件的型号、性能参数、控制方式进行了合理的配置,设计了行车制动单元,避免车辆制动、下长大坡道时可能引起的发动机飞车;3.对08-32捣固车的加速性能进行了重点研究。文章从车辆动力学和液压传动两方面分析了静液压传动行走系统的加速过程,并在此基础上制定了由电动比例控制液压泵和HA高压自动变量液压马达及电动比例控制液压泵和电动比例控制液压马达两种传动方案,实现车辆恒功率加速的排量控制模式;4.通过AMESim软件建立了车辆静液压传动行走系统的模型,同时对上述HA控制模式下,车辆的加速过程进行了仿真研究。最后,进行了静液压传动行走系统的加速实验。更多还原

【Abstract】 Tamper 08-32 works in area of closed corridor, so operation time is strictly limited to guarantee the railway unblocked. In order to fulfill tasks on time, tamper 08-32 should have two kinds of drive performance: Firstly, high speed driving performance is need, in order to reduce the non-operating time of driving to construction site; Secondly, operating speed must be stable to ensure operation quality and efficiency. Hydro-mechanical transmission is used widely in vehicles, which enable high-speed vehicle with better performance on interval. But it can not satisfy the requirement of steady operating speed because lack of a fixed ratio. Hydrostatic transmission is accurate speed regulation, but it is not suitable to the field of high speed driving in traditional concept. Therefore, existing tamper 08-32 has two transmission systems, hydro-mechanical transmission is for high speed and hydrostatic transmission is for operating speed. Structure of existing tamper 08-32 is complicated, efficiency is low, and axle gear box is damaged frequently. In this paper a hydrostatic transmission system is designed to implement both high/low speed driving, breaking the bottleneck which hydrostatic transmission is not applicable to the field of high speed driving. The main research works are as follow:1. The operational principle of drive system of tamper 08-32 has been analyzed. Defect of drive system is verified by test results. Rationally of that hydrostatic transmission is applicable to tamper 08-32 is discussed.2. New type hydrostatic transmission system is designed. Types, performance parameters, control modes of components are allocated rationally. Braking unit is set to prevent over running in engine when vehicle is braking or driving from ramp.3. Accelerating performance of tamper 08-32 is emphatically studied. Accelerating process of hydrostatic drive system is analyzed in paper by both vehicle dynamic and hydraulic transmission theory. Accelerating strategy is made based on this. In order to realized control model of constant-power acceleration, two accelerating control scheme, electric proportional adjusting hydraulic pump/HA high pressure auto vitiate displacement hydraulic motor and electric proportional adjusting hydraulic pump/electric proportional adjusting hydraulic motor, are made.4. The model of hydrostatic transmission system is built by AMESim, and accelerating process of vehicle is simulated by the same time. Finally, accelerating test of hydrostatic transmission system has been done.更多还原