螺旋槽结构参数对干气密封开启力和气膜刚度的影响

The influence of spiral groove's structure parameter on opening force and stiffness of the dry gas seals

采用ANSYS软件的参数化设计,在对螺旋槽干气密封端面流场进行数值计算的基础上,研究了螺旋槽结构参数对开启力和气膜刚度的影响.综合考虑较大的开启力和气膜刚度,计算结果表明,较适宜的动环结构参数为：螺旋槽数Ng=15—17个,螺旋角α=14°~20,°槽深Hg=5μm,槽长坝长比γ=0.625~0.705,槽台宽比δ=1.2~1.5.

Utilizing the ANSYS software parametric design,flow field analysis of gas film between the spiral groove dry gas seal was analyzed by numerical simulation.The influence of the structure parameters of spiral groove,on opening force and gas film stiffness was studied with comprehensive consideration of the larger open gas membrane stiffness,strength calculation results showed that acting-ring structure parameters is suitable：spiral slot number Ng=15-17,spiral angle α=14°~20°,groove depth employed by Hg=5 μm,groove long dam longer than the γ=0.625~0.705,wide than machine slot δ=1.2~1.5.