Applicability Analysis of Steady-state Models for Spiral Groove Gas Face Seals

doi:10.3901/JME.2017.23.007

Abstract

Abstract: The models of gas face seals for stead-state response analyses could be categorized into two basic models:equilibrium of axial forces static model (EAFSM), and axial-angular dynamic model (AADM). A parameter investigation including angular element and damping of secondary seals is carried out to gauge the difference between computing results of aforementioned models and to give themselves respective scope of application. The study shows that damping of secondary seals has much more remarkable influence on steady-state performance of face seals than angular tilt angles for its enormous effect on phase difference in angular modes. Even though the influence of rotor tilt angle and static stator tilt angle is feeble compared with damping, it cannot be ignored for the existence of damping. Therefore, when damping of secondary seals is enough small to neglect its effect on phase difference, EAFSM could be adopted to take place of AADM for time saving in practical project.

Key words: damping, gas seal, spiral groove, steady-state performance

CLC Number:

TH136

HU Songtao, HUANG Weifeng, LIU Xiangfeng, WANG Yuming. Applicability Analysis of Steady-state Models for Spiral Groove Gas Face Seals[J]. Journal of Mechanical Engineering, 2017, 53(23): 7-13.

References

[1] HU S, BRUNETIERE N, HUANG W, et al. Continuous separating method for characterizing and reconstructing bi-Gaussian stratified surfaces[J]. Tribology International, 2016, 102:454-462.
[2] HU S, BRUNETIERE N, HUANG W, et al. Stratified effect of continuous bi-Gaussian rough surface on lubrication and asperity contact[J]. Tribology International, 2016, 104:328-341.
[3] HU S, HUANG W, LIU X, et al. Probe model of wear degree under sliding wear by Rk parameter set[J]. Tribology International, 2017, 109:578-585.
[4] HU S, BRUNETIERE N, HUANG W, et al. Stratified revised asperity contact model for worn surfaces[J]. Journal of Tribology, 2017, 139:021403.
[5] ETSION I. A review of mechanical face seal dynamic[J]. Shock and Vibration, 1982, 14(3):9-14.
[6] ETSION I. Mechanical face seal dynamics update[J]. Shock and Vibration, 198517(4):11-16.
[7] ETSION I. Mechanical face seal dynamics 1985-1989[J]. Shock and Vibration, 1991, 23(4):3-7.
[8] SHAPIRO W, COLSHER R. Steady-state and dynamic analysis of a jet engine, gas lubricated shaft seal[J]. ASLE Transactions, 1974, 17(3):190-200.
[9] MILLER B A, GREEN I. Numerical formulation for the dynamic analysis of spiral-grooved gas face seal[J]. Journal of Tribology, 2001, 123(2):395-403.
[10] GREEN I, BARNSBY R M. A simultaneous numerical solution for the lubrication and dynamic stability of noncontacting gas face seals[J]. Journal of Tribology, 2001, 123(2):388-394.
[11] GREEN I, BARNSBY R M. A parametric analysis of the transient forced response of noncontacting coned-face gas seals[J]. Journal of Tribology, 2002, 124(1):151-157.
[12] RUAN B. Numerical modeling of dynamic sealing behaviors of spiral groove gas face seals[J]. Journal of Tribology, 2002, 124(1):186-195.
[13] 徐万孚,刘雨川,李广宇,等. 螺旋槽干运行非接触气体密封的理论分析与试验[J]. 机械工程学报, 2003, 39(4):124-127. XU Wanfu, LIU Yuchuan, LI Guangyu, et al. Theoretical analysis and experimental investigation of spiral groove dry running noncontacting gas seals[J]. Journal of Mechanical Engineering, 2003, 39(4):124-127.
[14] 彭旭东,江锦波,白少先,等. 干式气体密封端面型槽仿生设计的相关性[J]. 机械工程学报, 2014, 50(3):151-157. PENG Xudong, JIANG Jinbo, BAI Shaoxian, et al. Correlational research of bionics design of dry gas face seal groove[J]. Journal of Mechanical Engineering, 2014, 50(3):151-157.
[15] HU S, HUANG W, LIU X, et al. Influence analysis of secondary O-ring seals in dynamic behavior of spiral groove gas face seals[J]. Chinese Journal of Mechanical Engineering, 2016, 29(3):507-514.
[16] CHEN Y, JIANG J, PENG X. Gas film disturbance characteristics analysis of high-speed and high-pressure dry gas seal[J]. Chinese Journal of Mechanical Engineering, 2016, 29(6):1226-1233.
[17] GREEN I, ETSION I. Stability threshold and steady-state response of noncontacting coned-face seals[J]. ASLE Transactions, 1985, 28(4):449-460.
[18] GROSS W A. Fluid film lubrication[M]. New York:John Wiley & Sons, 1980.
[19] MILLER B A, GREEN I. Semi-analytical dynamic analysis of spiral-grooved mechanical gas face seals[J]. Journal of Tribology, 2003, 125(3):403-413.