共查询到19条相似文献,搜索用时 484 毫秒
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基于滤膜淤积法的油液污染在线监测系统 总被引:3,自引:0,他引:3
针对油液污染是导致液压系统故障的主要原因以及目前国内外油液污染大多不能实现在线监测的现状,提出基于滤膜淤积法的恒功率测量法,在保证功率恒定的情况下测量通过某一固定体积时的压差来间接测量油液的污染度。采用阀用直流电磁铁作为主推动力元件来推动特制液压缸内活塞杆来获得压降,自制金属滤膜作为传感元件,并设计了监控软件操作平台,完成了油液污染在线监测系统的设计、调试和试验工作。试验结果表明,该系统能给出相应的ISO、NAS及SAE油液污染等级,并有良好的人机交互能力。与离线测试装置相比,具有可信的精确度和实时性,可满足生产现场的使用要求,具有一定的推广应用价值。 相似文献
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光纤传感器在线油液监测系统的研究 总被引:2,自引:1,他引:2
在分析了油液污染产生的原因及其对机械设备的危害的基础上,利用油液中悬浮颗粒对光线的吸收,结合光纤传感系统的优点设计了油液光纤监测传感器。实验结果表明,该系统可以在一定程度上检测油液的污染度,在机械设备的实时在线监测中具有一定的应用价值。 相似文献
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针对已有油液在线监测产品(单一参数或集成多个单一参数的油液监测)的缺陷与不足,提出了一种齿轮箱润滑油多参数在线监测PHM(Prognostics and health management,故障预测与健康管理)系统,运用了多参数多维度的监测方法,初步采用通用的经验数据模型,通过实验验证模型的可行性及可靠性。给出多参数多维度的综合评判标准,降低误报率,为机械动力设备故障监测与寿命预测提供理论支撑,为油液在线监测技术的研究、应用和推广提供更可靠的方法。 相似文献
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油液监测技术的研究现状与发展方向 总被引:18,自引:2,他引:18
综述了国内外油液监测技术的研究现状,讨论了油液监测方法的最新进展,认为油液监测技术的研究热点是在线油液监测方法、磨粒自动识别技术和基于油液监测的智能诊断系统的研制与开发。在论述当前油液监测技术存在问题的基础上,提出了油液监测技术的基础研究和应用研究的未来方向。 相似文献
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H.S. Ahn E.S. Yoon D.G. Sohn O.K. Kwon K.S. Shin C.H. Nam 《Tribology International》1996,29(2):161-168
In order to identify the level of contamination of lubricating oil in a turbine-generator at a local power plant, contaminant analysis was conducted. The contaminant analysis was also used to assess the condition of tribo-components such as bearings, gears and bearing deflectors. Oil samples were taken and the debris in the used lubricating oil were analysed off-line to provide information for the construction of an on-line monitoring system. Statistical analysis of debris was also carried out to determine the quantitative trend of oil contamination. The on-line contaminant monitoring system was then developed with the capabilities to provide an early warning of excessive oil contamination and to detect any impending failures of tribo-components. Guidelines necessary for maintenance engineers such as preset warning level and a trip level (automatic shutdown) of contamination were established. In the system, a device utilizing a filter blockage principle was employed to measure the contamination level. The on-line system developed was installed and field tested in a turbine-generator at a local power plant. During the two year period of investigation, the lubricating system and related tribo-components were revealed to be in normal condition. 相似文献
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开发一种在线油液污染检测系统,该系统以滤膜作为传感元件,通过专门设计的配重系统实现恒压测试,可实现在线自动清洗、自动取样、自动检测,避免了二次污染和人工干涉对检测结果的影响,为故障诊断提供了可靠的数据. 相似文献
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光纤油液污染监测传感器设计 总被引:2,自引:0,他引:2
基于Beer-Lambert定律,悬浮在油液中的污染颗粒对入射光有吸收和散射作用,因此可根据发光强度的变化来反映油液污染度的变化情况。设计了光纤传感器探头,分析了其关键技术。为了实现在线实时检测。提出了正交光路的检测方法,初步的实验数据表明该传感器可反映油液的污染度水平,尽管目前仍旧存在一些问题,但光纤检测技术以其具有的优点将会成为最具生命力和应用前景的新的检测方法。 相似文献
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随着液压助力系统在新装备中的应用,液压油的污染问题逐步成为装备油液监测与分析的重要内容。通过液压油的污染监测可以反映液压系统的磨损状态和污染情况,论文采集了7辆使用了不同摩托小时的某型坦克液压助力系统的油液,应用光谱仪和便携式油质分析仪(portable oil diagnostic system,PODS)进行了颗粒浓度的分析与比较。结果发现Fe元素(来自油缸-活塞摩擦副)的含量基本随着使用时间的增加而逐渐增加,外来污染如硅元素的含量则与装备本身的日常维护好坏关系密切。总体看来光谱分析和污染度分析可以反映该系统的磨损程度和污染程度,可为装备在用油的使用维护与更换提供数据和技术支持。 相似文献
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In rolling bearings, contamination of lubricant oil by solid particles is one of the main reasons for early bearing failure. In order to deal with this problem, it is fundamental not only the use of reliable techniques concerning detection of solid contamination but also the investigation of the effects of certain contaminant characteristics on bearing performance. Nowadays, non-invasive techniques, such as vibration measurements, are being increasingly used for on-time monitoring of machinery performance. In this context, the present work investigates the effect of lubricant contamination by solid particles on the dynamical behavior of rolling bearings, in order to determine the trends in the amounts of vibration affected by contamination in the oil and by the bearing wear itself. Experimental tests were performed with radial ball bearings lubricated by oil bath. Quartz powder in three concentration levels and different particle sizes was used to contaminate the oil. Vibration signals were analyzed in terms of the root mean square (rms) values. The results show that changes in the rms values of vibration in the high-frequency band, from 600 to 10,000 Hz, were associated to the changes in oil lubrication in the bearing contacts, caused by oil contamination and wear damage on the bearing surfaces. 相似文献