Numerical Analysis of a Spiral-groove Dry-gas Seal Considering Micro-scale Effects

作     者：WANG Bing ZHANG Huiqiang 

作者机构：School of Aerospace Tsinghua University Beijing 100064 China Beijing 3E Enemy Key Laboratory Tsinghua University Beijing 100084 China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2011年第24卷第1期

页      面：146-153页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：supported by Scientific Research Foundation for Returned Scholars of Ministry of Education of China 

主　　题：micro-scale effect spiral-groove dry-gas seal numerical analysis Reynolds equation 

摘      要：A dry-gas seal system is a non-contact seal technology that is widely used in different industrial ***-groove dry-gas seal utilizes fluid dynamic pressure effects to realize the seal and lubrication processes,while forming a high pressure gas film between two sealing faces due to the deceleration of the gas pumped in or *** is little research into the effects and the influence on seal performance,if the grooves and the gas film are at the *** paper investigates the micro-scale effects on spiral-groove dry-gas seal performance in a numerical solution of a corrected Reynolds *** Reynolds equation is discretized by means of the finite difference method with the second order scheme and solved by the successive-over-relaxation（SOR） iterative *** Knudsen number of the flow in the sealing gas film is changed from 0.005 to 0.120 with a variation of film depth and sealing *** numerical results show that the average pressure in the gas film and the sealed gas leakage increase due to micro-scale *** open force is enlarged,while the gas film stiffness is significantly decreased due to micro-scale *** friction torque and power consumption remain constant,even in low sealing pressure and spin speed *** this paper,the seal performance at different rotor face spin speeds is also *** proposed research clarifies the micro-scale effects in a spiral-groove dry-gas seal and their influence on seal performance,which is expected to be useful for the improvement of the design of dry-gas seal systems operating in the slip flow regime.