Anatomy的 油膜

In 静压 支撑, high-pressure pump带来oil through 节流器 into recessed cavities (oil pockets) on 一 轴承 surface. oil flows across land ( small gap)以 edge, building pressure profile 该 lifts与支撑 moving element entirely on thin film—typically 3–50 μm thick.

Pressure与Load

供油压力为normally 1–10 MPa. When external load presses down, film on loaded side thins slightly; 节流器 responds by raising 该 cavity's pressure, restoring equilibrium. 该 self-correcting behaviour为what gives 静压 systems their remarkable 承载能力与刚度.

为何 Thickness 至关重要

A thicker nominal film tolerates contamination better but reduces 刚度; thinner film raises 刚度 but demands higher oil 清洁度. In practice, design 油膜 thickness为3–10 μm用于精度 静压 components,采用oil-cavity 平面度 held within ≤0.5 μm so film stays uniform.

Takeaway

油膜为not static cushion—it为an actively controlled pressure field. Proper pressure, clean oil,与precise cavity geometry为what 车削 simple film into 精度 轴承.