EFFECTS OF SURFACE ROUGHNESS AND SLIP FLOW ON THE PERFORMANCE OF A SPIRAL GROOVE GAS FACE SEAL
Considering the effects of surface roughness and slip flow, the extended Reynolds equation presented by Makino et al 1 is used to set up the finite element model for a non-contact spiral groove dry gas face seal (S-DGS). The analyses for a typical S-DGS at low speed (≤500 rpm) and low pressure (≤ 0.606 Mpa) showed that the effect of slip flow on the sealing performance is significant for 0.05 ≤Kn <1.0, where Kn refers to the Knudsen number, but the effect of surface roughness on the sealing performance varies with the different areas of both thetwo faces. When the standard deviation of composite roughness is less than 1.0 micron and in the range of 0.5 ≤Kn ≤1.0, the effects of surface roughness and slip flow diminished on gas film stiffness and frictional work but are still significant on the leakage rate. The effect of surface roughness of the spiral groove bottom is significant and should be considered, but the effects of the other surface roughness, I.e. the soft ring surface roughness and the un-grooved hard ring surface roughness, are negligible only when the value of the standard deviation ofcomposite roughness meets with API standards.
Spiral-groove dry gas seal (S-DGS) slip flow surface roughness finite element method
Peng Xu-dong Sheng Song-en Yin Xiao-ni Li Ji-yun
The Key Laboratory of Mechanical Manufacture and Automation of Ministry of Education, Zhejiang Unive Institute of Chemical Process Machinery, Zhejiang University of Technology, Hangzhou 310032, China
国际会议
海南三亚
英文
2007-01-10（万方平台首次上网日期，不代表论文的发表时间）