Fig2(b) is oil film profile along the center line in the direction of motion. Fig2(c) is contours of oil film thickness at a contact point. In Fig.2(a), X axis indicates a coordinate along the direction of motion. In Fig.2(b), X axis indicates a coordinate across the direction of motion.
Fig3(a),(b),(c),(d) show results of oil film thicknessin in cases of 5℃, 10℃, 15℃, 20℃ in the oil sink about Santotrac 50. In the figures, the mark ○ and △ indicate respectively experimental results of minimum and central film thickness, and solid line and dot line indicate Pascal's numerical results of minimum and cetral film thickness. Oil film thickness and increment of oil film thickness with increase of rolling speed decrease as oil temperature increases. In these comparison between numerical result and experimental result, pressure viscosity coefficients of test oil, which are shown in Table 4, were obtained. Pressure viscosity coefficient indicates characteristics of lubricants. Larger values of oil film thickness are obtained with larger pressure viscosity coefficients. From Fig.3, it was found that pressure viscosity coefficient decreses slightly with increase of oil temperature.
Fig. 4(a) Oil Film Thickness in Case of Load = 20N
Fig. 4(b) Oil Film Thickness in Case of Load = 25N
Fig. 4(c) Oil Film Thickness in Case of Load = 30N
Fig. 4(d) Oil Film Thickness in Case of Load = 35N
