Theoretical-Simulation-Experimental Study on the Hybrid Lubrication Performance of Stepped Hydrostatic Thrust Bearing

Abstract

Based on static pressure support technology, hydrodynamic, statics theory and tribology theory, theoretical derivation, calculation, simulation, and experimental monitoring of the static pressure, dynamic pressure, total pressure, dynamic pressure ratio, and total temperature rise of the lubricating oil film were conducted. The characteristics of stepped hydrostatic thrust bearing clearance oil film hybrid lubrication were obtained for the first time using a combination of theory, simulation, and experiment. It is found that the static pressure and total pressure of the oil film meet the reduction modes of the Fourier yj function and Fourier yz function within the rotating speed of 0r/min-200r/min. Within the load range of 0t-30t, the static pressure and total pressure of the oil film conform to the growth pattern of the Fourier yj function and Fourier yz function with constant term slopes of 10200 and 12150, and intercepts of 127700 and 156700. The theoretical value of oil film dynamic pressure and rotational speed exhibit a linear growth relationship with a slope of 275.2. The simulation value and rotational speed follow the growth law of the Fourier y model and are basically not affected by the size of the load. As the rotational speed increases, the oil film temperature of the rectangle on the outer side of the oil pad presents a concave shape in the circumferential distribution, while the rectangle on the inner side presents a convex shape.