Research On The Effect Of Lubrication Performance Due To Transmutation Of Thrust Bearing Pads

Lubricant of large and middle thrust bearing is oil or water,and also the major equipment of transferring axial thrust.Unit pressure,force and thermal deformation increased when the load increased and contact area hardly changed,then local temperature of bearing pad are too high to fracture the oil film,formed to dry friction,eventually the bearing surface is collapsed.When thrust bearing are working under the conditions of high velocities and heavy loads,the effect of bearing pads deformation should be considered in the lubrication performance of bearing.In order to further study on lubrication performance of pads,this article beginning with the influence of deformation and improve the lubrication performance calculation.The TEHD model of sector tilting thrust bearing pad consisted of generalized equation with Reynolds,energy,viscosity-temperature and oil film thickness of the pads is established,the field of pressure,temperature and oil film thickness is obtained.Bearing deformation(deformation of force and thermal)based on pressure distribution,temperature distribution,using commercial finite element software ANSYS calculations and repeated iterations,ultimately determine force and thermal deformation coupling in the steady-stated under different structures and operating conditions.The analytical results show that the bearing deformation has some impacts on the lubrication properties of tilting pad thrust bearing when under the conditions of high velocities and heavy loads.Minimum oil film thickness of sliding bearing increased obviously when include deformation than that not and maximum oil film temperature reduced significantly.This suggests that suitable deformation is good for improving the lubrication performance of thrust bearing.In addition,the main parameters carve of thrust bearing lubrication performance are obtained according to the different structure size and conditions,then analysis iscarried on sector pad thrust bearing,at the same time,it provides theoretical basic for engineering calculation.