可倾瓦滑动轴承的失效研究

发布时间：2018-04-12 10:24

本文选题：可倾瓦滑动轴承 + 失效形式　；参考：《山东大学》2015年硕士论文

【摘要】：石油化工行业的生产具有连续性,其生产装置需要长期稳定的运行。离心式压缩机是石化行业提供压力气体的关键设备,如果故障停机会造成极大损失。可倾瓦滑动轴承作为关键零部件,其运转稳定性对提高压缩机稳定性、安全性及经济性运行、延长使用寿命都具有非常重要的意义。但石油化工行业一般属于重工业地区,空气质量差,环境污染严重,可倾瓦滑动轴承的失效损坏事故较为频繁。本课题以可倾瓦滑动轴承为研究对象,查找轴承的部分失效原因。对现场压缩机事故进行分析,从失效原因入手,主要做了三部分的研究：第一部分,研究轴瓦磨损情况,并确定磨损失效和润滑环境的关系,采用电子显微镜(SEM)观察磨损微观组织,确定磨损形式,分析破坏位置和发展过程。第二部分,通过油液分析的各项实验,观察失效轴瓦在用油的性能参数,所含颗粒物及污染程度,发现轴瓦润滑方面存在的失效原因,并提出了需更换润滑油时的检测数据。第三部分,认真研究流场分析理论和应用软件,采用数值模拟技术,借助ProE、FLUENT等计算机辅助软件,获得轴瓦内流场湍流状态,分析轴瓦运行状态下油膜的形成情况。通过对可倾瓦滑动轴承磨损、润滑、油膜的实验和分析,提出改善轴承运行的几条建议：第一,在本次检修记录中可观察到瓦块的出口侧有明显的磨损,建议优化可倾瓦轴承的瓦块支点位置。第二,油液分析中对颗粒物和油液污染的结论,指导现场油液监测的报警数值。如果需要更换油液,应该全部更换,不要部分补充新油。第三,在保留轴承形状尺寸的前提下,将轴承初启动时的油液升温的工序做好做到位,能大大改善初启动时压力大造成的干摩擦现象。
[Abstract]:The production of petrochemical industry has continuity, and its production unit needs long-term stable operation.Centrifugal compressor is the key equipment to supply pressure gas in petrochemical industry.As a key component, tilting pad sliding bearing is of great significance in improving compressor stability, safety and economy, and prolonging service life.But the petrochemical industry belongs to the heavy industry area, the air quality is poor, the environment pollution is serious, the failure damage accident of the tilting pad sliding bearing is more frequent.In this paper, the tilting pad sliding bearing is taken as the research object to find out the partial failure reason of the bearing.Based on the analysis of the accident of the field compressor, three parts of research have been done: the first part is to study the wear of the bearing bush, and to determine the relationship between the wear failure and the lubricating environment.The wear microstructure was observed by means of electron microscope (SEM), the wear form was determined, and the failure position and development process were analyzed.In the second part, through the experiments of oil analysis, the performance parameters, particulates contained and pollution degree of the failed bearing are observed, and the causes of failure in lubrication of the bearing are found, and the testing data when the lubricating oil needs to be replaced are put forward.In the third part, the theory and application software of flow field analysis are studied in detail. By using numerical simulation technology and computer aided software such as ProEtor fluent, the turbulent state of flow field in bearing is obtained, and the formation of oil film is analyzed.Through the experiment and analysis of wear, lubrication and oil film of tilting pad sliding bearing, several suggestions to improve the operation of bearing are put forward: first, obvious wear on the outlet side of tile block can be observed in this inspection and repair record.It is suggested to optimize the bearing position of tipping pad.Secondly, the conclusions of oil analysis on particulate matter and oil pollution can guide the alarm value of oil monitoring.If oil needs to be replaced, it should be replaced completely and not partially replenished with new oil.Thirdly, on the premise of retaining the bearing shape and size, the dry friction phenomenon caused by the high pressure during the initial start can be greatly improved by putting the oil heating process into place during the initial start of the bearing.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.21

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