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以计算流体动力学(CFD)数值计算理论及方法为基础,利用Fluent软件采用标准k-ε湍流模型和标准壁面函数对处于高压、高转速等复杂工况的波纹管机械密封的摩擦副之间的液膜进行数值模拟。结果表明,进出口压力不变时,摩擦副间的液膜压力随着液膜半径的增加而增大;出口压力不变,进口压力变大时,相同半径点的压力逐渐变大。液膜承载力与液膜压力和面积相关,进口压力变大,液膜的整体压力变大,液膜承载力增加;液膜宽度变大,液膜与摩擦副的接触面积增长,液膜的承载力也会增加。
Based on the computational fluid dynamics (CFD) numerical calculation theory and method, the standard k-ε turbulence model and the standard wall function are used to analyze the friction between the pair of frictional joints of the bellows mechanical seal under high pressure and high speed. The liquid film was numerically simulated. The results show that the pressure of the liquid film between the friction pairs increases with the increase of the liquid film radius when the pressure of the inlet and outlet is constant, and the pressure of the same radius becomes larger as the pressure of the outlet increases. The bearing capacity of the liquid film is related to the pressure and the area of the liquid film. The inlet pressure becomes larger, the overall pressure of the liquid film becomes larger, and the bearing capacity of the liquid film increases. The width of the liquid film becomes larger and the contact area between the liquid film and the friction pair increases. Carrying capacity will also increase.