Study On Multiphase Flow Field And Bearing Capacity Of Tapered Hydrostatic Sliding Bearing

Taper hydrostatic sliding bearings can withstand both axial and radial load,with a small footprint,simple structure,long life,good reliability,good technology,easy to adjust the bearing clearance and so on,it is a key part of a rotating machine that is heavy and accurate.Gradually,Scholars have found through practice and experiment the serviceability,life expectancy and reliability of the hydrostatic sliding bearing are largely affected by the bearing of the bearing and the lubricating performance,therefore,analysis of the bearing capacity of tapered hydrostatic bearings is particularly important,In recent years,in the production of lubricating oil,various solid suspending additives are often added to improve the lubricating performance of base oil.In practical work,particulate deposits and debris generated by friction and abrasion may be mixed into the lubricating oil.The quality of the lubricating oil Determines the bearing capacity of the sliding bearing size,so the solid particles on the impact of the sliding bearing is particularly important,So in this paper,the multiphase flow field of solid particles in the parameters and the speed of bearing bearing performance were studied.In order to simulate the taper gap fluent,firstly,solidworks was used to establish the three-dimensional model of the flow field between conical hydrostatic bearings,The mesh is then imported into ICEM in ANSYS,then through the CFD principle to select the turbulence model in FLUENT,incompressible fluid,iterative calculation using a split solver,finally,the post-processor analysis of the results.In practical work,the distribution of solid particles in the oil film has a significant impact on the fluid pressure.The more the particles are distributed,the greater the fluid pressure is.If the solid particles are too concentrated,they may cause siltation,clogging,therefore,the paper analyzes the distribution of solid particles in multi-phase flow field by changing the density,diameter,volume fraction and bearing speed of solid particles in the flow field.The following main conclusions,in terms of particle distribution: 1.The greater the rotational speed,the more dense the distribution of solid particles,and the more particle distribution under the double inlet conditions than the single inlet conditions.2.The greater the density,the more dense the solid particles in the multiphase flow field are at the edge of the oil chamber,and the solid particles under the double inlet port are more densely distributed than the single inlet port.3.The larger the volume fraction of solid particles,the more dense the distribution.4.The smaller the solid particle diameter,the more uniform the particle distribution in the multiphase flow field.In the aspect of bearing capacity,the influence on bearing capacity of single-inlet and double-inlet by changing the parameters of solid particle diameter,volume fraction,density and bearing rotation speed is analyzed.The conclusions are as follows: 1.Bearing axial and radial load capacity increases with increasing solid particle density.2.The radial bearing capacity under single inlet condition and the axial and radial bearing capacity under double inlet condition increase with the increase of rotational speed,while the axial load capacity under single inlet condition is slightly.3.The axial and radial bearing capacity of the bearings increases with increasing solid particle volume fraction.4.As the particle diameter is reduced,the bearing capacity of single-inlet and double-inlet are increased,and the axial load capacity of double inlet is obviously better than the axial load capacity of single inlet.