Ensuring Tightness of Sealing Joints at the Design Stage

摘要

The issues of ensuring the tightness of sealing joints are considered. It is indicated that to calculate the tightness at the design stage, it is necessary to know the regime of the outflow of the medium being sealed, which is determined by the Reynolds number. It is shown that the Reynolds number is determined by the ratio of the linear mass flow rate through the sealing joint to the dynamic viscosity of the sealed medium. Dependencies of the relative contact area, the density of gaps in the joint, and the probability of medium flow from the dimensionless force elastic-geometric parameter f_q should be determined taking into account the mutual influence of asperities of the rough surface. Said contact characteristics determine the functional of the permeability C_u which characterizes the sealing capacity of the sealing joint. Their role in various periods of loading of a sealing joint by a dimensionless load is shown.