Aerostatic bearings design and analysis with the application to precision engineering: State-of-the-art and future perspectives

Effects of manufacturing errors on the static characteristics of aerostatic journal bearings with porous restrictor

High-speed aerostatic spindles are essential for ultra-precision micro-milling machine tools. The distinguishing functional characteristics of the spindle system are achieved through innovative des...

Multiphysics-based design and analysis of the high-speed aerostatic spindle with application to micro-milling

Numerical analysis and experimental investigation into the effects of manufacturing errors on the running accuracy of the aerostatic porous spindle

Aerostatic bearings are the critical parts of ultra-high speed spindles applied to precision milling, grinding, and other precision engineering applications. In this paper, the computational design...

https://journals.sagepub.com/doi/pdf/10.1177/0954406216639344

Computational design and analysis of aerostatic journal bearings with application to ultra-high speed spindles:

CFD based investigation on influence of orifice chamber shapes for the design of aerostatic thrust bearings at ultra-high speed spindles

A FEM based modeling method for analyzing the static performance of aerostatic thrust bearings considering the fluid-structure interaction

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

https://www.mdpi.com/2076-3417/11/3/959/pdf

Siyu Gao

Papers

CFD based investigation on influence of orifice chamber shapes for the design of aerostatic thrust bearings at ultra-high speed spindles

Multiphysics-based design and analysis of the high-speed aerostatic spindle with application to micro-milling

Computational design and analysis of aerostatic journal bearings with application to ultra-high speed spindles:

A FEM based modeling method for analyzing the static performance of aerostatic thrust bearings considering the fluid-structure interaction

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