A kind of self-pumping hydrodynamic mechanical seal

that the liquid inlet groove was arranged on the stationary ring and the dynamic pressure groove was distributed on the rotating ring

was put forward based on the principle of centrifugal pump. The experimental scheme of the self-pumping mechanical seals was designed by orthogonal test. The numerical simulation experiments were carried out based on Fluent

including discussing the significant effects of every parameter on the face opening force and the leakage rate. The numerical results showed that the groove number Ng

the ratio of groove length and dam length γ

the ratio of groove width and ridge width d

and the pressure p were the significant factors affecting the opening force FO and the leakage rate Q within the experimental ranges. Besides

the rotate speed n also affected Q significantly. Specifically

FO was increased with increasing g

d and p

while decreased with increasing Ng. The influence of g

d

p and Ng on Q was similar to that on FO. But Q was also increased with increasing n. The preliminary optimization of sealing structure was brought forward by analyzing the results of orthogonal test.