THE ELASTOHYDRODYNAMIC PROPERTIES OF LUBRICANTS IN REFRIGERANT ENVIRONMENTS

The elastohydrodynamic (EHD) film-forming properties of several refrig eration oils placed in pressurized refrigerant environments were inves tigated by an interferometric EHD tester equipped with a pressurized v essel. It has been shown that the oils with dissolved refrigerants for med EHD films at the point of contact in the same manner as lubricant base fluids. It was also found that greater amounts of dissolved refri gerant in the oil decreased not only the viscosity but also the viscos ity-pressure coefficient of the oil. In this paper, the authors descri be a method to predict the viscosity-pressure coefficient of oils with dissolved refrigerants.