Structural Design And Numerical Simulation Of Load-bearing Characteristics Of Thrust Sliding Bearing Of Vertical High-speed Pump

Vertical high-speed pumps are widely used in petroleum,chemical,energy,aerospace and other industries.Thrust sliding bearings are one of the important parts of vertical high-speed pumps.Due to the high working speed of high-speed shafts of high-speed pumps,thrust sliding bearings the low load-bearing performance and high temperature rise often lead to poor lubrication conditions and wear failures.Therefore,the research on the lubrication load-bearing characteristics of thrust sliding bearings for high-speed pumps is becoming more and more important.This paper focuses on the study of the relationship between the improved structural design and load-bearing characteristics of thrust sliding bearings for high-speed shafts of vertical high-speed pumps: on the basis of the inclined plane bush thrust sliding bearing structure,two structural thrusts are designed,inclined plane eccentric structure bush and annular groove inclined plane bush sliding bearings,based on the theory of hydrodynamic lubrication,and considering the viscosity-temperature characteristics of the lubricating oil,a one-way heat-fluid-solid coupling numerical simulation analysis method is used to analyze the load-bearing characteristics of the two thrust sliding bearings under different structural parameters.The conclusion is as follows,for eccentric inclined plane bush thrust sliding bearings,the increase in eccentricity makes the bearing performance first increase and then decrease.When the eccentricity is 6mm,the load performance is better.Increasing the inclination angle of the inclined surface also makes the bearing capacity first increase and then decrease.When the shaft speed is 13000r/min,the load capacity is better when the inclination angle is 0.27°;for the annular groove inclined plane thrust sliding bearing,the increase in the length ratio of the planar annular groove makes the bearing capacity first increase and then decrease,and the bearing capacity when the ratio is 0.5 better,the increase in the width of the annular groove improves the load-bearing performance,and the increase in the depth of the annular groove improves the load-bearing performance of the bearing,but as the groove depth continues to increase,the load-bearing performance will decrease.The load-bearing capacity is better when the groove depth is 50μm.Different radial positions of annular groove have different effects on the bearing capacity,and the bearing capacity will increase with the increase of groove number.Finally,a friction and wear comparison experiment was carried out on the thrust sliding bearing.By comparing the experimental results of friction torque curve,friction coefficient curve,and surface wear,it is concluded that the thrust sliding bearing with improved structural design has good tribological performance.