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Predictive Maintenance with Oil Moisture Measurement

VaisalaPredictive Maintenance with Oil Moisture Measurement: Industrial Gears and Lubrication
贾斯汀·沃尔什(Justin Walsh)
Business Development Engineer
发布: 2020年7月28日
工业制造和流程
Industrial Measurements

水分在各种应用和过程中都是已知的污染物,但是工业用途中的水分存在可能尤其有害。影响油的质量和性能,已知水会增加粘度和空化。它还降低了添加剂和膜强度,并为生物污染和腐蚀带来了机会。

与古老的格言“油和水混合”,水可以用三种形式的油共存:溶解,乳化和自由水。溶解的水是一种自然的条件,在该条件下,单个水分子在油中扩散,就像我们如何将水分子识别为空气中的湿度一样。乳化和游离水是油饱和的条件,导致水悬浮并在油中分离。后一种形式对液压,润滑和其他工业系统面临最有害的条件和维护挑战。

工业油在许多方面有所不同,其中可接受的绝对水分水平也是如此。每种油都以基本库存开头,然后根据用于提供不同物理和化学特性的添加剂而变化。使用,油年龄它们的病情降解,引入污染物,并可以开始氧化。这使油可以在溶解状态下储存更多的水,从而改变其饱和点。这种变化很重要,因为它影响了哪些测量参数与预防性维护最相关。随着石油的年龄,每百万零件(PPM)措施的相关性较小,因此Vaisala已对其进行标准化水活动(AW)and percent of relative saturation (%RS) parameters to indicate relevant dissolved moisture levels. The aw and %RS parameters are independent of oil type and account for fluctuating temperatures and saturation points, thus providing a more useful measurement for preventative maintenance.

Knowing the concentration of dissolved water relative to the oil’s saturation point is the best indicator to predict when the oil and water will begin to separate. This information can be used to detect water ingress problems, trigger maintenance events and oil replacement intervals.

检测油在油中的危险积累始于可靠,准确的测量,并且有不同的方法来测量油中溶解的水。传统方法涉及采样和分析,但仅使用电容性聚合物传感器直接进行内联测量提供实时信息。这些内联测量提供了可以迅速作用以防止有害条件的连续数据。访问此信息可提供可衡量的投资回报,并节省能源,预防性维护计划和故障指示。

Vaisala使用我们自己的腐殖质®传感器技术for measuring moisture in oil, and the HUMICAP®sensors were the very first that could measure moisture in oil online. The sensor materials are specifically developed to measure very low moisture levels in hydrocarbons, and the measurement also considers the temperature of the oil. With almost 50 years of experience developing and manufacturing电容性水分传感器for air and oil, Vaisala has become the market leader for this application across multiple industries including lubrication systems, maritime and the paper industry. Built in our own cleanrooms,这些传感器可提供长期稳定和精确的测量,无论应用多么强大。

去除水分是油维持油的另一个关键组成部分,高质量油的常见方法包括真空脱水和吸水培养基的不同形式的过滤。在线干燥可快速改善石油质量,但这种改进可能不是永久性的。随后的监测是审慎的,通常会导致另一个干燥周期。有效的在线干燥需要持续的努力和一致的水分测量,以进行质量控制,采样无法匹配。

Vaisalaoffers its HUMICAP®technology in a number of flexible installation and integration options. From portable meters and smart probes, to advanced transmitters and OEM solutions, Vaisala Moisture in Oil instruments are designed to protect your capital equipment investment.

评论

莎拉德

2020年8月3日
How can water increase the viscosity of Oil? Please elaborate

安东尼·科特

2020年8月3日
谢谢您的问题Sharad!我们感谢对我们的博客的兴趣!

当水污染变得饱和和乳化时,污染物可能会导致较高的粘度。油乳化中的这些水显示在某些水含量范围内的粘度增加,这些水含量根据温度和压力而变化。

If you haven't already, we would love to have to join our webinar "Oil Moisture Measurement for Industrial Quality Control" August 27th at 2pm. We will discuss moisture in industrial use oil in greater detail and welcome any follow-up questions you may have. Please find the registration link in the "Webinars" section of our website under the "Upcoming" section.

Please let us know how we can help further.

Shayur

Mar 4, 2021
出色的作品很好地展示了对设备和机械进行预防性维护的好处。

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