集中润滑故障检测与诊断系统开发

发布时间：2018-04-18 22:06

本文选题：集中润滑 + 故障诊断　；参考：《华北水利水电大学》2017年硕士论文

【摘要】：集中润滑是减少摩擦、降低磨损、节约能耗的重要方法,已成为车辆、机械设备和生产线的主要辅助装置。在节能降耗、高可靠性、高自动化方向发展的背景下,这些设备对润滑也提出了更高的要求。但现有集中润滑系统工作状态无法实时检测,出现故障不能及时被发现和快速定位,设备的润滑可靠性得不到保障。因此迫切需要开展集中润滑系统在线检测与故障诊断技术研究。本文在郑州奥特科技有限公司研制的AR60系列和ALP100系列集中润滑系统产品的基础上开展研究,利用虚拟仪器技术,基于LabVIEW软件开发平台进行集中润滑检测与故障诊断系统的开发研究。其主要工作及成果如下:(1)结合工程实际及大量国内外文献,系统并深入地研究了集中润滑系统的各种形式,分析了系统主要部件的结构组成、工作原理和控制方法,总结了各种集中润滑系统的优缺点。(2)以模块化、闭环控制的思想设计了单点电控式油脂分配器及使用该分配器的集中润滑系统,该系统布线简单灵活,可扩展性强,响应迅速,工作可靠,具有单点控制、状态反馈、故障定位等功能优势。(3)基于虚拟仪器技术,对现有集中润滑系统进行了结构改造,添加了相应的传感器及其信号调理电路,采用NI公司的USB-6351数据采集器以及图形化应用开发平台LabVIEW设计开发了集中润滑装置性能检测平台,实现了油路压力、泵驱动电机电流、油脂分配器运行状态等主要性能参数的在线检测与数据记录。(4)以上述检测平台为硬件基础,分析了该润滑系统的故障机理,建立了故障树诊断模型,并构建出知识库,提出了故障树分析法与专家系统相结合的润滑系统故障诊断方法,用LabVIEW开发了上位机故障诊断系统界面。(5)通过实验研究了4种常见故障工况下压力和电流特性曲线的波形规律,结合分配器到位信号对比分析并提取了特征参数,结果表明:本文提出的方法可以实现润滑系统运行状态的检测与故障诊断。以上研究成果为集中润滑及其故障检测与诊断新产品的研发及优化设计提供了理论和实践的依据,对于指导集中润滑新产品的开发具有一定的工程实用价值。
[Abstract]:Centralized lubrication is an important method to reduce friction, reduce wear and save energy consumption. It has become the main auxiliary device of vehicle, mechanical equipment and production line.In the background of energy saving, high reliability and high automation, these equipments also put forward higher requirements for lubrication.However, the existing centralized lubrication system can not be detected in real time, fault can not be detected and quickly located in time, and the lubrication reliability of the equipment can not be guaranteed.Therefore, there is an urgent need to develop centralized lubrication system online detection and fault diagnosis technology.On the basis of AR60 series and ALP100 series centralized lubricating system products developed by Zhengzhou Ott Technology Co., Ltd., this paper makes use of virtual instrument technology.Based on LabVIEW software development platform for centralized lubrication detection and fault diagnosis system development and research.The main work and results are as follows: (1) combined with engineering practice and a large number of domestic and foreign documents, the various forms of centralized lubrication system are systematically and deeply studied, and the structure, working principle and control method of the main components of the system are analyzed.The advantages and disadvantages of various centralized lubrication systems are summarized. (2) the single point electrically controlled grease distributor and the centralized lubrication system using this distributor are designed with the idea of modularization and closed-loop control. The system has simple and flexible wiring, strong expansibility and rapid response.It has the advantages of single point control, state feedback, fault location and so on. Based on the virtual instrument technology, the existing centralized lubrication system has been reconstructed, and the corresponding sensor and its signal conditioning circuit have been added.Using NI company's USB-6351 data collector and graphic application development platform LabVIEW, the performance test platform of centralized lubrication device is designed and developed, which realizes oil path pressure and pump driving motor current.On-line detection and data recording of main performance parameters such as the running state of grease distributor. (4) based on the above testing platform, the fault mechanism of the lubrication system is analyzed, the fault tree diagnosis model is established, and the knowledge base is constructed.This paper presents a fault diagnosis method of lubrication system combined with fault tree analysis and expert system. The interface of upper computer fault diagnosis system is developed with LabVIEW. The waveform law of pressure and current characteristic curves under four common fault conditions is studied by experiments.The characteristic parameters are extracted and compared with the signal in place of the distributor. The results show that the method presented in this paper can be used to detect and diagnose the running state of lubricating system.The above research results provide a theoretical and practical basis for the research and development and optimization design of new products for centralized lubrication, fault detection and diagnosis, and have a certain engineering practical value for guiding the development of new centralized lubrication products.
【学位授予单位】：华北水利水电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH117.2

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