制造误差对气体静压轴颈-止推轴承静特性影响

为了分析制造误差对轴颈－止推相连型结构气体静压轴承的影响，提出了相容性变换条件，将轴颈和止推轴承进行统一分析；在离散化过程中，利用加权余量法将二阶偏微分方程降低一阶，主松了对插值函数连续度的要求，便于借助有限元技术分析狭缝节流气体静压轴承的流场参数。研究了平行度、圆度和商面垂直度等制造误差对静态特性的影响；重点分析了轴颈轴承和止推轴承之间的相互影响，发现了轴颈的锥度误差会影响轴向承载能力，止推端面垂直度误差会影响径向承载能力。

Effect of manufacturing errors on static characteristics of externally pressurized gas journal-thrust bearings

The effect of manufacturing errors on the static characteristics of the externally pressurized gas journalK thrust bearings is studied by finite element method. The consistent transform principle is proposed to program the computation for journal and thrust bearing. The second order partial differential equation, Reynolds equation, is reduced by one order with the weighted residual method in the discretization procedure, which releases the requirement of continuity degree of the interpolation function while finite element method is adopted. The analyses of this paper centers on the influence of the parallelism and roundness of the shaft surface, head face verticality on the load capacities. The mutual influences between journal and thrust bearing is stressed. The shaft taper error produces an impact on the axial load capacities, while the head face verticality error exerts an influence on the radial load capacities.