Leakage is a common natural phenomenon in the process of mechanical sealing. The so-called "leakage" is the material from the inside of the limited space to the outside, or other substances from the outside of the space into the inside. The material referred to here may be gas, liquid, solid or other physical.
Mechanical seal technology to solve is to prevent or reduce leakage. The main causes of leakage are the following two factors: one is the gap on the sealing surface; Two is the sealing surface on both sides of the pressure difference or concentration difference. Leakage of materials can be prevented or reduced by eliminating or mitigating either factor. The method of reducing leakage, that is, the sealing method is mainly the following: (1) reduce the number of sealing parts; ② Increase fluid flow resistance; (3) add the work element to reverse the flow of the fluid; (4) Suction or injection of sealing medium.