设计简介
摘 要
随着工程机械的迅速发展，挖掘机的销量越来越大。多路阀作为挖掘机液压系统重要元件，其性能对挖掘机整机的质量和技术水平有很大影响。由于一旦装机后多路阀液压系统出现故障就很难检测到故障源，因此在其装机前对其进行全面的性能检验显得很有必要。但是目前国内现有的多路阀测试试验系统功能不齐全，且系统操作复杂，测试效率低。因此本文以多路阀测试试验相关标准和相关设计技术要求为依据，结合现代挖掘机多路阀中常见的功能特性，利用电液比例技术设计了一套高效率，操作方便的全电液控制式液压挖掘机多路阀综合测试系统。结合多路阀测试系统中阀芯位移难于测量且其对测量结果的影响，依据测试
结果对阀芯位移进行了补偿研究。
关键词：挖掘机多路阀；综合测试系统；电液比例控制；挖掘机
Abstract
With the rapid development of engineering machinery, the sales of excavator are growing up day by day. Multi-way valve as one of the important elements of excavator hydraulic system, its performance directly determines the quality and technical level of excavator. As the loader hydraulic system fault is very difficult to be detected, the comprehensive and accurate performance test of the multi-way valve is important in the front of the assembly of the machine. But The function of the existing testing systems for multi-way valves are not very versatial，and their process is complexed to handle and the efficiency is very low. In this thesis, a set of efficient and convenient operation integrated test system for multi-way valve of hydraulic excavator will be
designed by using electro-hydraulic proportional control technology based on the related standards of multi-way valve technology and related technical requirements, and combined with the common features of the modern excavator multi-way valve. As the testing system is hard to detect the displacement of the spool valve and it will give effect to the measurement, according to the test results the research of displacement compensationon of the spool will be given.
Keywords: Excavator multi-way valve; test system; electro-hydraulic proportional control; excavator.
目 录
摘 要.......................................................................................................1
第1章 绪论 ............................................................................................3
1.1 多路阀简介....................................................................................................3
1.2 多路阀的发展趋势与挖掘机多路阀特点 ..................................................4
1.3 多路阀测试研究现状 ..................................................................................5
1.4 课题研究意义 ..............................................................................................6
1.5 课题主要研究内容........................................................................................7
第2章 挖掘机多路阀综合测试系统整体技术方案设计......................8
2.1 挖掘机多路阀综合测试系统技术要求........................................................8
2.1.1 试验系统基本要求 ...........................................................................9
2.1.2 综合测试系统试验项目和要求 .....................................................10
2.2 全电液控制综合测试系统设计任务 ........................................................12
2.3 测试系统整体技术方案 ............................................................................13
2.4 测试系统各功能单元方案..........................................................................14
2.4.1 系统动力输入与运行控制方案 .....................................................14
2.4.2 全电液控制方案 .............................................................................16
2.4.3 负载模拟加载方案 .........................................................................16
2.4.4 系统油路切换控制方案 .................................................................17
2.4.5 测试系统油温控制方案 .................................................................18
2.5 测试系统主要特点 ....................................................................................20
2.6 本章小结 ....................................................................................................21
第3章 液压及测控系统设计................................................................22
3.1 测试系统的液压系统概述..........................................................................22
3.2 数据采集与控制系统设计..........................................................................22
3.2.1 数据采集与控制系统简介 .............................................................22
3.2.2 数据采集系统硬件设计 .................................................................23
3.2.3 数据采集传感器选型以及抗干扰设计...........................................24
3.2.4 数据采集及控制软件设计 .............................................................25
3.3 测试试验系统整体设计布局......................................................................27
3.4 多路阀一般测试流程规划..........................................................................27
3.5 本章小结 ....................................................................................................29
总结与展望..............................................................................................30
致谢.........................................................................................................32
参考文献..................................................................................................33
随着工程机械的迅速发展，挖掘机的销量越来越大。多路阀作为挖掘机液压系统重要元件，其性能对挖掘机整机的质量和技术水平有很大影响。由于一旦装机后多路阀液压系统出现故障就很难检测到故障源，因此在其装机前对其进行全面的性能检验显得很有必要。但是目前国内现有的多路阀测试试验系统功能不齐全，且系统操作复杂，测试效率低。因此本文以多路阀测试试验相关标准和相关设计技术要求为依据，结合现代挖掘机多路阀中常见的功能特性，利用电液比例技术设计了一套高效率，操作方便的全电液控制式液压挖掘机多路阀综合测试系统。结合多路阀测试系统中阀芯位移难于测量且其对测量结果的影响，依据测试
结果对阀芯位移进行了补偿研究。
关键词：挖掘机多路阀；综合测试系统；电液比例控制；挖掘机
Abstract
With the rapid development of engineering machinery, the sales of excavator are growing up day by day. Multi-way valve as one of the important elements of excavator hydraulic system, its performance directly determines the quality and technical level of excavator. As the loader hydraulic system fault is very difficult to be detected, the comprehensive and accurate performance test of the multi-way valve is important in the front of the assembly of the machine. But The function of the existing testing systems for multi-way valves are not very versatial，and their process is complexed to handle and the efficiency is very low. In this thesis, a set of efficient and convenient operation integrated test system for multi-way valve of hydraulic excavator will be
designed by using electro-hydraulic proportional control technology based on the related standards of multi-way valve technology and related technical requirements, and combined with the common features of the modern excavator multi-way valve. As the testing system is hard to detect the displacement of the spool valve and it will give effect to the measurement, according to the test results the research of displacement compensationon of the spool will be given.
Keywords: Excavator multi-way valve; test system; electro-hydraulic proportional control; excavator.
目 录
摘 要.......................................................................................................1
第1章 绪论 ............................................................................................3
1.1 多路阀简介....................................................................................................3
1.2 多路阀的发展趋势与挖掘机多路阀特点 ..................................................4
1.3 多路阀测试研究现状 ..................................................................................5
1.4 课题研究意义 ..............................................................................................6
1.5 课题主要研究内容........................................................................................7
第2章 挖掘机多路阀综合测试系统整体技术方案设计......................8
2.1 挖掘机多路阀综合测试系统技术要求........................................................8
2.1.1 试验系统基本要求 ...........................................................................9
2.1.2 综合测试系统试验项目和要求 .....................................................10
2.2 全电液控制综合测试系统设计任务 ........................................................12
2.3 测试系统整体技术方案 ............................................................................13
2.4 测试系统各功能单元方案..........................................................................14
2.4.1 系统动力输入与运行控制方案 .....................................................14
2.4.2 全电液控制方案 .............................................................................16
2.4.3 负载模拟加载方案 .........................................................................16
2.4.4 系统油路切换控制方案 .................................................................17
2.4.5 测试系统油温控制方案 .................................................................18
2.5 测试系统主要特点 ....................................................................................20
2.6 本章小结 ....................................................................................................21
第3章 液压及测控系统设计................................................................22
3.1 测试系统的液压系统概述..........................................................................22
3.2 数据采集与控制系统设计..........................................................................22
3.2.1 数据采集与控制系统简介 .............................................................22
3.2.2 数据采集系统硬件设计 .................................................................23
3.2.3 数据采集传感器选型以及抗干扰设计...........................................24
3.2.4 数据采集及控制软件设计 .............................................................25
3.3 测试试验系统整体设计布局......................................................................27
3.4 多路阀一般测试流程规划..........................................................................27
3.5 本章小结 ....................................................................................................29
总结与展望..............................................................................................30
致谢.........................................................................................................32
参考文献..................................................................................................33
