Abstract：For the problem of small gas film stiffness, poor opening performance and stability of a spiral-grooved face dry gas seal at a low speed, a new type of dry gas seals with bionic twin-path grooves was introduced based on the outline characteristics of a bird wings. It means that there is a piece of land in a spiral groove. The typical geometrical parameters defining the dry gas seal with twin-path spiral grooves were given. Reynolds equation was resolved by using finite difference method for gas film pressure distributions. The seal performances of such a new type of dry gas seal were studied by va-rying geometrical parameters of a twin-path spiral groove under hydrostatic conditions. The twin-path spiral groove geometrical parameters were optimized. In order to ensure the stiffness, sealing ability and opening characteristic of such a dry gas seal, perfect values of parameters are 0.4≤λ≤0.6, 0.6≤γ≤0.8, 2≤δ≤3,5 μm≤hg≤8 μm, 15°≤α≤20°, 0.7≤η≤1.3.
彭旭东, 张风云, 白少先, 李纪云. 仿鸟翼型双流通槽干气密封静压特性模拟[J]. 排灌机械工程学报, 2013, 31(10): 888-893.
Peng Xudong, Zhang Fengyun, Bai Shaoxian, Li Jiyun. Hydrostatic performance of a dry gas seal with bionic twin-path spiral grooves. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(10): 888-893.
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