多功能农用作业机液压驱动系统的设计及研究

发布时间：2018-03-09 08:54

本文选题：多功能作业机　切入点：行走系统　出处：《江苏大学》2017年硕士论文　论文类型：学位论文

【摘要】：多功能作业机是一种新型的农业机械,行走系统的传动方式直接影响了整机工作性能和运转费用。目前国内多功能作业机行走系统大多采用传统的机械传动,其存在结构复杂、操作繁琐、系统故障多等缺点。随着液压驱动的技术飞速发展,越来越多的农用机械行走系统开始应用液压驱动,其结构简单、调速范围大、操作方便,工作平稳可靠,具有可靠的行驶性能、操作性能等优点。本文以某多功能作业机为研究对象,为提高其作业效率和操纵性能,对其行走系统进行设计与研究。论文在综合比较机械驱动、电力驱动、液力驱动和液压驱动四种驱动方式的基础之上,提出将多功能作业机的行走系统采用液压传动代替原有的机械传动,并就具体的液压回路、调速方案、马达驱动方式作具体分析,设计出一种新颖的多功能作业机液压驱动系统;确定多功能作业机液压驱动系统的整体结构与布置,对其工作过程进行分析;对多功能作业机动力学和运动学进行分析,为液压驱动系统具体参数进行匹配设计,确定了系统压力、发动机、液压泵和液压马达的具体性能参数,并进行相关校核;对多功能作业机液压泵、液压马达变量调节方式进行动态特性分析,建立变量泵、变量马达数学模型,液压驱动系统的等效负载;基于AMEsim软件,建立了多功能作业机液压驱动系统模型,仿真分析液压驱动系统分别在多功能作业机的起步工况、停车工况、前后动力同时工作等工况下的响应特性,验证所选的液压系统的性能能否满足田间作业要求。本文将液压传动应用于多功能作业机的行走系统上,对液压驱动系统进行了系统的设计与匹配,就所选液压泵与马达进行了具体的模型分析,基于AMEsim对多功能作业机液压驱动系统进行建模与仿真,分析液压系统的稳定性与合理性,为以后多功能作业机液压驱动的设计与研究提供了参考。
[Abstract]:Multifunctional working machine is a new type of agricultural machinery. The driving mode of walking system directly affects the working performance and running cost of the whole machine. At present, the traditional mechanical transmission is used in the walking system of the multifunctional machine in our country, and its structure is complex. With the rapid development of hydraulic drive technology, more and more agricultural machinery walking system began to use hydraulic drive, its structure is simple, speed regulation range is large, operation is convenient, work is stable and reliable, It has the advantages of reliable driving performance and operation performance. In this paper, a multifunctional operating machine is taken as the research object. In order to improve its working efficiency and maneuverability, the traveling system is designed and studied. On the basis of four driving modes of electric drive, hydraulic drive and hydraulic drive, the hydraulic transmission is used to replace the original mechanical drive in the walking system of the multifunctional working machine, and the specific hydraulic circuit and speed regulation scheme are discussed. A novel hydraulic drive system of multifunctional operating machine is designed, and the whole structure and arrangement of the hydraulic drive system of multifunctional working machine are determined, and the working process is analyzed. By analyzing the dynamics and kinematics of the multifunctional machine, the specific parameters of the hydraulic drive system are designed and matched, and the system pressure, the specific performance parameters of the engine, the hydraulic pump and the hydraulic motor are determined, and the relevant checking is carried out. The dynamic characteristics of hydraulic pump and hydraulic motor are analyzed, the mathematical model of variable pump, variable motor and the equivalent load of hydraulic drive system are established, based on AMEsim software, the dynamic characteristics of hydraulic pump and hydraulic motor are analyzed, and the mathematical model of variable pump and variable motor is established. The hydraulic driving system model of the multifunctional operating machine is established. The response characteristics of the hydraulic drive system under the conditions of the starting condition, the stopping condition, the front and rear power simultaneously working of the multifunctional operating machine are simulated and analyzed, respectively. The performance of the selected hydraulic system can meet the requirements of field operation. In this paper, the hydraulic transmission is applied to the walking system of the multifunctional working machine, and the hydraulic drive system is designed and matched. The specific model analysis of the selected hydraulic pump and motor is carried out, and the modeling and simulation of the hydraulic drive system of the multifunctional working machine based on AMEsim are carried out, and the stability and rationality of the hydraulic system are analyzed. It provides a reference for the design and research of hydraulic drive of multifunctional machine.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S22

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