潤滑油の流動性に関する実験的研究 : 低温流動性の検討

概要

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In this study, the viscoelastic properties of lubricating oils have been examined quantitatively using a torsional oscillating viscometer and qualitatively by means of torsional braid analysis (TBA) in a range of temperatures from -50 to +20℃. Using the results obtained by means of the viscometer, dynamic viscosities, dynamic rigidities and flow activation energies were calculated. The effects of the concentration of pour point depressant and viscosity index improver into a mineral oil on the viscosity-temperature characteristics were also examined. Mechanical losses and relative rigidities were obtained by means of TBA. The experimental results obtained by the two methods adopted in these experiments show good agreement. It is clarified that both the viscometer and TBA are effective for the examination of fluidity of lubricating oils in the low-temperature range.
社団法人日本機械学会の論文
1993-12-25