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支架用阀类元件性能测试系统设计与仿真研究

发布时间:2019-02-16 01:39
【摘要】:液压支架是煤矿综采工作面支护系统中的核心设备,用于支护巷道煤层顶板,防止矸石回落采煤区,最大限度的保障人员和设备的安全。阀是液压支架中的主要控制元件,支架中阀类元件主要包括安全阀、换向阀、液控单向阀、截止阀四类。阀类元件性能的好坏直接影响液压支架的工作状态,研究支架阀类元件性能测试方法与系统对保障煤矿安全生产有重要的现实意义。本文依据国家标准GB25794.3-2010《煤矿用液压支架第3部分:液压控制系统及阀》中关于液压支架用阀类元件性能测试要求,研究确定了阀类元件性能测试系统需要完成的测试项目和主要检测参数。按照模块化的思想设计了阀类元件性能测试液压回路,并对液压试验台关键元件进行参数计算和元件选型。利用AME Sim建模仿真系统搭建了液压回路,以BD20K7-10B315Y型先导溢流阀、FHS400/125/31.5型电液换向阀、FDT-400/40型液控单向阀、FJZ400/31.5型截止阀为研究对象,在仿真模式下得到各阀特性试验性能参数变化曲线,以及阀芯阀体配合间隙、系统压力、温度等参数对电液换向阀内泄漏量的影响。经过分析研究,该液压回路满足阀类元件性能测试需求。基于虚拟仪器技术构建了测试系统硬件平台,完成了传感器、采集卡的选型以及调理电路的设计。以LABVIEW2011为软件开发平台,开发了支架阀类元件性能测试软件,集数据采集、数据处理、图形显示、数据查询、报表生成为一体,实现了对支架中不同类型阀类元件的性能检测。通过实验对测试系统静态特性进行分析,结果表明各通道静态特性良好。最后以实验室现有设备—FCYCS-F液压控制阀组综合实验台为基础,搭建硬件测试平台进行功能验证,实验证明,本文研发的支架用阀类元件性能测试系统所具有的功能能够满足国家标准要求。
[Abstract]:Hydraulic support is the core equipment in the support system of fully mechanized coal mining face in coal mine. It is used to support the roof of roadway coal seam, prevent gangue from falling back into coal mining area, and ensure the safety of personnel and equipment to the maximum extent. The valve is the main control element in the hydraulic support. The valve type in the support mainly includes the safety valve, the reversing valve, the hydraulic control one way valve, and the stop valve. The performance of valve components has a direct impact on the working state of hydraulic support. It is of great practical significance to study the testing methods and systems of valve components in support for ensuring the safe production of coal mines. According to the national standard GB25794.3-2010 < coal mine hydraulic support part 3: hydraulic control system and valve >, the performance test requirements of valve components used in hydraulic support are described in this paper. The test items and main testing parameters of valve component performance test system are determined. According to the idea of modularization, the hydraulic circuit for testing the performance of valve components is designed, and the parameters of the key components of the hydraulic test-bed are calculated and the components are selected. The hydraulic circuit is built by using AME Sim modeling and simulation system. The research object is BD20K7-10B315Y pilot relief valve, FHS400/125/31.5 electro-hydraulic reversing valve, FDT-400/40 hydraulic control one-way valve and FJZ400/31.5 type globe valve. In the simulation mode, the change curves of the performance parameters of each valve characteristic test, and the influence of valve core valve body fit clearance, system pressure and temperature on the leakage volume in the electro-hydraulic directional valve were obtained. Through analysis and research, the hydraulic circuit meets the requirement of valve component performance test. Based on the virtual instrument technology, the hardware platform of the test system is constructed, and the sensor, the selection of the acquisition card and the design of the conditioning circuit are completed. Based on the software development platform of LABVIEW2011, a software for testing the performance of valve components is developed, which integrates data acquisition, data processing, graphic display, data query and report generation, and realizes the performance testing of different types of valve components in the bracket. The static characteristics of the test system are analyzed through experiments, and the results show that the static characteristics of each channel are good. Finally, based on the existing laboratory equipment-FCYCS-F hydraulic control valve group comprehensive experimental platform, build hardware test platform for functional verification, experimental results show that, The function of valve component performance test system developed in this paper can meet the requirements of national standards.
【学位授予单位】:西安科技大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:TD355.4

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