Estimation of the Oxidative Deterioration of Turbine Oil Using Membrane Patch Color

IF 1.5 Q3 ENGINEERING, MECHANICAL
Tomohiko Kon, T. Honda, A. Sasaki
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引用次数: 4

Abstract

Lubricating oils degrade into two main products: oxidation products and solid particles. Oxidation products, called varnish, of turbine oils for power generation have become a particularly serious problem in recent years. The first step in determining the potential to produce varnish is to determine the remaining life of the antioxidant in the oil, but even though turbine oil may have antioxidants of sufficient longevity, varnish problems still occur frequently. Accordingly, to prevent varnish, it is necessary to diagnose oil oxidation products. Thus, the authors have developed a diagnostic method using membrane patch color, but the relationship between membrane patch color and the remaining life of turbine oils has yet to be clarified. This paper investigates a new method for estimating the oxidative degradation of turbine oils that uses membrane patch color and the dry turbine oxidation stability test (dry TOST) based on oxidation products and the remaining life of the turbine oils. Sample oils were prepared and degraded by oxidation in the laboratory using a dry TOST apparatus, and the membrane patch color was measured using a colorimetric patch analyzer (CPA). The relationship between membrane patch color and the rotating pressure vessel oxidation test (RPVOT) residual rate was then investigated. The results show that the new estimation method using the CPA and dry TOST is able to monitor the decrease of the RPVOT residual rate from the early stages of oxidative deterioration.
利用膜斑色评价汽轮机油的氧化劣化
润滑油降解为两种主要产物:氧化产物和固体颗粒。近年来,发电用汽轮油的氧化产物,称为清漆,已成为一个特别严重的问题。确定产生清漆的潜力的第一步是确定油中抗氧化剂的剩余寿命,但即使涡轮油可能具有足够寿命的抗氧化剂,清漆问题仍然经常发生。因此,为防止清漆,有必要对油的氧化产物进行诊断。因此,作者开发了一种利用膜斑颜色的诊断方法,但膜斑颜色与汽轮机油剩余寿命之间的关系尚未明确。本文研究了一种基于氧化产物和涡轮油剩余寿命的干式涡轮氧化稳定性试验(dry TOST)和膜斑色法估计涡轮油氧化降解的新方法。在实验室中使用干燥的TOST设备制备和氧化降解样品油,并使用比色膜片分析仪(CPA)测量膜斑块颜色。研究了膜斑颜色与旋转压力容器氧化试验(RPVOT)残留率的关系。结果表明,基于CPA和干TOST的估算方法能够监测氧化变质早期RPVOT残留率的下降情况。
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来源期刊
Advances in Tribology
Advances in Tribology ENGINEERING, MECHANICAL-
CiteScore
5.00
自引率
0.00%
发文量
1
审稿时长
13 weeks
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