Abstract:This study builds two different forms of spiral groove seal structures by applying UG threedimensional modeling software, and makes a network division of them with Gambit software, and besides, it also makes a simulation to the sealed microgap threedimensional flow field of the two different forms of spiral grooves by making use of Fluent, namely the solving tool of hydrodynamics. The study shows that both of the two forms of spiral grooves can produce obvious hydrodynamic effect; within a certain range of speed, the total pressure of end faces increases along with the rise of rotating speed; compared with the spiral groove of the same kind opened at the external diameter, the hydrodynamic pressure effect of the conveying groove opened between seal faces is more obvious, forming more stable hydrodynamic lubricating film.