Hydraulic oil

Abstract

Abstract PURPOSE:To enable easy detection of slight oil leakage from an apparatus, etc. using hydraulic oil from the fluorescence generated when UV rays or the like are irradiated thereto without decrease in the characteristic of the hydraulic oil by adding preliminarily a slight amt. of a fluorescent material of hydrocarbon to the hydraulic oil. CONSTITUTION:Fluorescent materials of diphenyl ethane, naphthalene, anthracene, naphthacene, etc. which may have a hydrocarbon substitutent in an arom. ring and fluorescent materials of hydrocarbon contg. N, O, S, etc. such as 1',2',7', 8'-dinaphthazine, 1,2,4-hydroxyanthraquinone, etc. are added in a range of 0.01- 1.0wt% to a hydraulic oil. Very slight oil leakage is thus detected by the fluorescence to be emitted when various electromagnetic rays having a wavelength of an IR ray or below are irradiated to the leaking point, without deteriorating the oxidation life of the hydraulic oil and the characteristic such as wear resistance or the like with a hydraulic pump. The sure detection of the oil leakage from the point where a manual operation was previously impossible is made possible.

Inventors

• 👤 Tahei Okada
• 👤 太平 岡田
• 👤 Kenzo Iwamoto
• 👤 岩本　賢三

Bibliographic Details