Performance of inherently compensated flat pad aerostatic bearings subject to dynamic perturbation forces

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

“…However, uniform pressure in the pocket was used as the boundary condition, which could not match the actual pressure distribution. Bhat et al [19] modeled the static and dynamic perturbation performance characteristics of the inherently compensated rectangular flat pad bearings using the FEM, the numerical model was also validated by experimental tests. Chen et al [20] compared static and dynamic characteristics of a rigid spindle supported by aerostatic bearings which were compensated by orifices and inherences.…”

Dynamic characteristics of ultra-precision aerostatic bearings

“…Numerical techniques, such as finite difference method (FDM) [4] and finite element method (FEM) [6], have been adopted in the study of dynamic characteristics of aerostatic bearings. In this paper, a dynamic mesh modeling technique using commercial CFD software is proposed to investigate dynamic characteristics of multirestrictor aerostatic bearings with shallow recesses.…”

Improving the pneumatic hammer stability of aerostatic thrust bearing with recess using damping orifices

“…H.G Elrod describes the dynamic stiffness and damping of the bearing by the coefficients of the Lagrange polynomial [11]. The dynamic stiffness and damping characteristics of the annular throttle [12] and Orifice [13] bearing and aerostatic bearings with stabilizing restrictors [14,15] are studied. The improvement in stability was obtained by decreasing bearing stiffness.…”