Analysis of Static Characteristics of Silicone Oil-based Magnetic Fluid Lubrication Bearing Film
The use of magnetic fluid as a lubrication medium can optimize the performance of sliding bearings and real-ize controllable dynamic pressure lubrication.To improve the oil film characteristics of magnetic fluids,a study was conduc-ted on the static characteristics of the oil film of silicone oil-based magnetic fluids with better performance.The static char-acteristics of the lubricating film under different working conditions were investigated by numerical analysis considering the cavitation effect for a silicone oil-based magnetic fluid lubricated sliding bearing.The results show that the rotational speed has insignificant improvement on the oil film bearing capacity,the friction increases as the speed increases.The eccentricity has significant effect on the improvement of oil film pressure and oil film bearing capacity,and the highest pressure region gradually moves toward the minimum oil film thickness direction with the increase of eccentricity,the friction decreases slightly with the increase of eccentricity.The increase of magnetic field strength can improve the oil film load carrying ca-pacity,but the increase magnitude depends on the rotational speed and eccentricity,and the maximum amplitude increases with the increase of eccentricity as well as decreases with the increase of speed.The results can provide some reference for the design of bearings lubricated by magnetic fluid.
silicone oil-based magnetic fluidsliding bearingoil filmstatic propertiescavitation effect
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