Influence of Design Parameters and Environmental Factors on the Lubrication Performance of Stern Bearings
In order to improve the lubrication performance of the stern bearings of marine equipment under low-speed and heavy-loading conditions,the stern bearing of marine propulsion shaft system was chosen as the research object.The lubrication performance parameters of water-lubricated bearings under two-phase flow state was solved by the mixture model of Fluent.The influence of design parameters and environmental factors on bearing lubrication performance was ana-lyzed.Result show that the bearing capacity is positively linearly correlated with the aspect ratio,and as the aspect ratio in-creases,the growth rate of the maximum water film pressure gradually slows down.The bearing capacity first increases and then decreases with the increase of the number of grooves,with a peak value appearing at 2 grooves.The maximum pressure and bearing capacity of the water film gradually decrease with the increase of groove angle or groove depth,while the fric-tion coefficient increases.The hydrodynamic performance of V-groove bearings is better,with a 7.2％increase in bearing capacity compared to U-groove bearings.The maximum pressure of the water film gradually increases with the increase of the inclination angle γy of the axis around the x axis,and its growth rate gradually increases.When the inclination angle yy is 0.020°,the maximum pressure of the water film is 7.2 times that without axis inclination.The increase in seawater con-centration will improve the lubrication performance of bearings,and when the seawater concentration increases from 0 to 100‰,the bearing capacity increases by 15.8％.This study can provide theoretical reference for the design optimization and testing of stern bearings.
万方数据
维普
