T Groove Dry Gas Seal Of Fluid-solid Coupling Analysis

Mechanical seal is a key device of leakproof and energy conservation in mechanical equipment. Modern machinery and equipment works in high demand situations, such as high temperature, high pressure and high speed. The more the demand is higher,the requirement of the sealing performance is higher. Nowadays, long service life, less leakage, low energy consumption, high efficiency and high stability and reliability have became the basic requirement of mechanical seal. Dry gas seal(DGS), a new technology of non-contact mechanical seal, compared with the conventional contacting mechanical seal, which is low cost, no seal oil, low maintenance cost, low energy loss, low process gas leak, system safety and reliability, is widely used in end face sealing of axe sealing. Therefore, as a kind of superior performance new dry gas seal mechanical seal, it has a high research value.Compared with the dry gas seal technology abroad, domestic dry gas seal technology starts late, the technology of them have a larger gap. The main research of dry gas seal technology is focus on spiral groove dry gas seal(DGS), the study of other kinds is less, including T slot, V groove, straight groove etc.. However in engineering practice, different kind of groove dry gas seal has their own unique performance to suit their working condition. So it is necessary to study the performance of other kinds of slot gas seal.The T-shaped groove dry gas seal is studied in this paper. For the advantages of its structure, it has widely used in practical engineering. The performance simulation is propose in this paper. First, finite element analysis software ANSYS Workbench is presented to simulate the fluid field of T groove dry gas seal, and the calculated opening force and stress distribution are obtained. The simulation result shows that T groove dry gas seal can effectively block the leakage of sealing medium channel and achieve zero leakage of sealing medium or zero escape. Second, geometry model of T groove dry gas seal is built in ANSYS Workbench platform and a two-way fluid-structure coupling analysis method is proposed to simulate. The structure of the deformation, stress distribution and pressure distribution are obtained. The result also shows that deformation of end face of T groove dry gas seal has a great influence on gas film thickness. Finally, two kinds of improvement structure of T groove dry gas seal are proposed to analysis. Result indicates that performance of T groove dry gas seal is same as the former, but the structure is superior.