阀座-阀瓣接触力学
SEAT-DISC CONTACT MECHANICS

• 在放大的角度观察，即使是地面、丛叠的表面也显示出既不规则又很粗糙。
  When magnified, even a ground, lapped surface appears irregular and rough.
• 泄漏率与表面平滑度和光洁度有关。
  The rate of leakage is a function of the smoothness and finish of the surfaces.
• 阀座-阀瓣（楔瓣）触点位于顶点之间。
  The seat-disc (wedge) contacts are between the peaks.
• 为了完全气密连接，在接触表面的大部分处于精微接触之前，顶点在压力下肯定会有所变形。
  For absolutely leak-tight joints, the peaks must be deformed with torque until a large portion of mating surfaces is in microscopic contact.
• 压缩应力大约是屈服应力的3倍（70,000 psi - 210,000 psi）。
  The compression stress is approximately 3 times the yield (for 70,000 psi–210,000 psi).
• 通过扭矩产生充足的接触压力是重要的。接触压力的稍微增加，可以迅速减少泄漏。
  Sufficient contact pressure generated by the torque is essential. A small increase in contact pressure produces a rapid decrease in leakage.
• 阀门阀座可以很窄，也可以很宽，主要取决于阀门的类型。
  The valve seat should be either very narrow or very wide, depending on the valve type.