Lubrication Characteristics Of Water Lubricated Rubber Bearings Based On ANSYS Fluid Solid Coupling

Due to the high viscosity of the lubricating oil,the traditional oil lubricated sliding bearing friction can produce a large amount of heat when it is running at high speed.Water lubricated bearing is a kind of bearing with natural water as lubricating medium,it has no oil lubrication bearing environmental burden,clean without pollution,and save energy.The water lubricated bearing has a small amount of heat at high speed,and the water can take away part of the heat.In addition,the water lubricated bearings bearing clearance is small,strong anti vibration ability,can provide a higher machining accuracy.At present,water lubricated bearing technology has been widely used in various ships.According to the installation space,speed and geometric structure of the bearing,to determine the flow state of turbulent flow,combined with the hydrodynamic lubrication theory and fluid solid coupling theory,with the help of Ansys fluid analysis module and Ansys-cfx analysis module of Transient Structural solid solid coupling analysis model is established for water lubricated bearing flow,the internal flow field of the bearing in the operation process of the detailed analysis,discusses the fluid domain and solid domain pressure and deformation characteristics,analyzed the influence of eccentricity and speed of change of rubber layer pressure.And the influence of the groove structure on the hydrodynamic pressure effect.The forming process and principle of hydrodynamic lubrication are introduced.The cause of fluid solid coupling and the interaction between fluid field and solid domain are analyzed..The fluid pressure nephogram of different eccentricity,water supply,transition arc radius,groove angle and groove number is analyzed.The results show that with the increase of eccentricity,the turbulent state of fluid is stronger,the peak value of fluid pressure is bigger,the deformation of rubber is strong,and the friction and wear performance of bearing is worse.With the increase of water supply,the radial velocity and axial velocity of fluid will increase,but the increase of radial velocity is small.The larger the radius of the transition arc,the weaker the wedge effect of the fluid at the groove,the more stable the fluid flow,the weaker the dynamic pressure and the lower the bearing capacity of the bearing.The existence of the groove reduces the flow pressure of the lubricating fluid,so the bearing capacity of the bearing is reduced.Therefore,the speed and large eccentric rate is helpful to the formation of fluid dynamic pressure;decreasing groove radius can not only improve the bearing capacity and reduce the friction coefficient,but also can improve the rubber lining layer and metal bonding surface equivalent stress distribution;the smaller transition arc radius can increase the effective length of the convergence wedge thus,to improve the lubrication performance.