The work aims to design a dry gas seal end face structure with bi-directional rotation characteristics and favorable opening performance,and derive a new groove structure through optimization of the T-groove.The flow field characteristics and steady-state performance parameters of the classical T-groove and the derived groove were compared using finite element soft-ware.The influence of different parameters on the steady-state performance of the dry gas seals was also investigated to reveal the sealing mechanism of the derivative groove.Above all,the derived groove type had a higher opening force compared with the classical T-groove,resulting in increased leakage rate.The steady-state performance parameters of both groove types in-creased linearly with the working condition parameters,and the difference between the two types gradually widened,with a minimum difference of 6.6%.However,as the groove depth increased,the difference in leakage rate decreased.To improve the leakage control function of the derivative groove,the groove depth should be greater than 5 μm.The derived groove with a flow-inducing slot structure demonstrated better steady-state performance in the order of: divergent > straight > convergent. But the difference in values was small, which was up to 1.2％, under selected conditions. The derived groove exhibits a more pro-nounced dynamic pressure effect and significantly improved opening performance compared with the classical T-groove. Addi-tionally, opening different forms of derivative groove can change the flow characteristics and sealing performance of the gas film.
关键词
T形槽干气密封/微槽流动/衍生结构/仿真计算/增压效应
Key words
T-groove dry gas seal/micro-channel flow/derived structure/simulation calculation/pressurization effect
维普
万方数据