213 メンブランパッチの色によるタービン油の酸化劣化診断法の開発(セッション7 設備診断技術)

Abstract

Lubricating oil is used in various machines and devices. However, lubricating oil is degraded with operating time or usage environment. Degradation causes of the lubricating oil are roughly classified into two types, one is caused by solid particle and other is caused by oil oxidation products. Diagnosis methods for solid particles in lubricating oils have many standards and researches. However, there are few diagnosis methods for oil oxidation products. Furthermore, oxidation degradation of the turbine basis oil becomes a serious problem in power generation plants recently. Therefore, on-site degradation diagnosis method which can detect the early stage of oxidation degradation of lubricating oil is desired for the proactive maintenance. In this study, we have developed degradation diagnosis method of lubrication oil which paid to the attention to coloration of the membrane patch with contamination. We prepared sample oils which were degraded by oxidation in the laboratory. We measured color parameters of membrane patches produced from sample oils using the colorimetric patch analyzer. As a result, we found that this method could detect the early stage of oxidation degradation of lubricating oil by measuring color parameters of membrane patch using the colorimetric patch analyzer.