CFD-Based Investigation on Effects of Orifice Length–Diameter Ratio for the Design of Hydrostatic Thrust Bearings

Orifice-restricted hydrostatic thrust bearings are broadly employed in ultra-precision machine tools, aerospace industries, and so forth. The orifice length–diameter ratio (OLDR) is one of the significant geometrical parameters orifice-restricted bearing, which directly affects performance bearing. To accurately guide design effect OLDR on bearing needs to be thoroughly scientifically investigated, especially for tools. In this paper, influences various OLDRs comprehensively studied using computational fluid dynamics (CFD) approach pressure pattern, velocity, turbulent intensity, vortices, as well load capacity, stiffness, volume flow rate, resistance under identical operating conditions. obtained results show that there differences behaviors caused by different OLDRs. Some new findings obtained, particularly second-order small vortices appear annular recesses with all except 2, does not always increase increasing Finally, proposed CFD experimentally validated.