This paper investigates the heat transfer characteristics of hydrostatic bearing in a 5m vertical lathe based on fluid-solid-heat coupling analysis. The relationship among convective heat transfer coefficient of hydrostatic bearing friction pairs, rotational speed and load is deduced. The influence of rotational speed, heavy load and convection mode on heat dissipation performance of friction pairs in a hydrostatic bearing is investigated by numerical simulation and experimental test. It is found that the temperature of the upper and side surfaces of rotational workbench decreases slightly with the increase of rotational speed and heavy load, and the temperature of the upper and side surfaces are 26.6 • C and 22.4 • C respectively when its rotational speed is 60r/min and load is 25t, compared with 10r/min and 25t load, and the temperature decreases by 6.3% and 4.7% respectively, then the temperature remains basically constant, the heat transfer mode of rotational workbench is mainly forced convection. Rotational speed is the main factor that affects the heat transfer characteristics of the rotational workbench, the effect is greater when the rotational speed is less than 60r/min, and there is little effect when it is higher than 60r/min, the load has less effect on heat transfer characteristics. However, the heat transfer mode of the base is mainly heat conduction and natural convection. INDEX TERMS High speed and heavy load, hydrostatic thrust bearing, friction pairs, heat transfer characteristic, simulation and experiment study.
When the hydrostatic workbench is running under high-speed overload conditions, the friction by-product is partially placed, causing the micro-gap oil film to be smaller, and the tribology is exposed. The oil film morphology of hydrostatic workbench directly affects its lubrication performance, and the oil film morphology is determined by deformation of bearing friction pairs and the oil film morphology is extremely difficult to obtain. This study will provide an acquisition method for the oil film morphology through the deformation of the bearing friction pair, and the deformation prediction of hydrostatic workbench having double rectangular cavities in heavy type vertical lathe has studied based on ANSYS WORKBENCH, and these are helpful to further investigate oil film shape under the working conditions of high-speed and heavyload. The oil film clearance test rig was established, and the simulation results were verified, which verified the effectiveness of the proposed numerical simulation method. It can be concluded that the rotational speed has a greater impact on the oil film thickness than that of load, and the oil film thickness of downstream side is smaller than that of upstream side, and oil film thickness changes more quickly inside of oil sealing edge than that of outside, and the friction behavior and failure mechanism of this kind of bearing are proved.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.