In order to solve the difficult separate problem of a type of plug seal structure, the finite element analysis
was used to calculate the interaction pressure of seal zone of “Y”, “L”, “T” and “O” seal ring, The sealing experiment
and separating experiment has been conducted to prove the finite element results. The results show that the
sealing of shaped structure is finer and the structure can lower the friction of plug , which will lead to the separation
flexible.