Abstract:The twodimensional axissymmetric finite element model of double Y shape seal ring was established.The effects of initial compression,lubricating oil pressures as well as the pressure difference between lubricating oil and slurry on its maximum contact pressure were analyzed.The results show that the maximum contact pressure of sealing face of double Y shape seal ring is increased with the increasing of lubricating oil pressure,and it is always greater than the lubricating oil pressure under different lubricating oil pressure conditions,as a result,a good seal can be formed.With the increasing of the initial compression,the maximum contact pressure is decreased gradually,so the sealing performance can be improved by reducing the initial compression properly on the premise of ensuring a good seal.With the increasing of the pressure difference,the maximum contact pressure is increased first,then decreased,and finally tended to be stable.With the maximum contact pressure of sealing surface as the optimization target,the optimal parameters combination scheme of the double Y shape seal ring was obtained based on the response surface method.