Research On Lubrication Performance Of Hydrostatic Center Rest In Super-heavy Horizontal Boring Lathe

With the changing of modern processing industry development level, people’s requirements of machine machining precision and work efficiency gradually improve, especially hydrostatic center rest is one of the important parts in super-heavy machine processing. Hydrostatic center rest’s bearing performance is directly related to machining precision and machining efficiency of artifacts, since the machining of super-heavy horizontal boring lathe is large load and easier to cause friction failure than other machine, to predict clearance oil film’s bearing capacity of hydrostatic center rest in super-heavy horizontal boring lathe and research lubrication performance can avoid friction failure effectively, improve machining quality and machining precision.In this paper, the research object is hydrostatic center rest in super-heavy horizontal boring lathe, theory calculation is the first to get numerical of the rejection of oil, the temperature rise of the oil film and act under ideal situation circumstances, then mathematical model of clearance oil film, middle supporting tile and artifacts that has not yet been is set up by UG, using numerical simulation software ANSYS ICEM CFD mesh grid for oil film model, importing oil film model completed to ANSYS CFX can get relevant data such as temperature rise of the oil film, pressure field distribution and hydraulic oil flow field by different speed under two different working condition of variable viscosity ant constant viscosity after setting boundary conditions and iterative solution and come to the conclusion that the influence of speed on lubrication performance of hydrostatic center rest. At the same time coupled thermo-mechanical analysis by ANSYS Workbench can obtain the simulation of deformation of middle supporting tile and artifacts after applying temperature field and pressure field to the middle supporting tile and artifacts, artifacts is shaft for example. Comprehensive analysis is made by the simulation results, predicting oil film’s deformation under actual working condition and avoiding dry friction or friction failure can provide feasibility reference for later oil film lubrication mechanism research.In order to verify the accuracy of the theoretical calculation and numerical simulation, experiments of hydrostatic center rest’s lubrication performance is designed. Hydrostatic center rest’s tile is decorated with pressure sensors and temperature sensors, recording oil film temperature and pressure changes by transforming speed. Finally the experimental data collected is the same as the trend of simulation results, the accuracy of the numerical simulation is verified, laying the foundation for the further elastohydrodynamic lubrication research.