Interaction effect of optimized value of geometric parameters of spiral groove of dry gas seal

doi:10.11949/j.issn.0438-1157.20170857

Abstract

Abstract:

The interaction effects of other geometric parameters on the optimized value of a certain geometric parameters of spiral groove dry gas seal (DGS) in low pressure are analyzed for the purpose of solving the problem of the interaction effect of geometric parameters of hydrodynamic groove on objective function that have been ignored in optimization design of hydrodynamic groove of DGS which leads to the inaccuracy of optimized value of geometric parameters. Geometrical and mathematical model of spiral groove DGS are set up according to the theory of gas lubrication. The pressure distribution and steady performance are obtained by solving the Reynolds equations by using finite difference method, and several characterized parameters of spiral groove are defined. The change rules of optimized values for the maximum film stiffness of a certain geometric parameter of spiral groove with other geometric parameters in different operation velocity are presented. The results show that complicated interaction effect relationship existed between the geometric parameters of spiral groove DGS, of which suit for the three comprehensive design criteria, including decrease the amplitude changes of real flow area of groove, groove length-width ratio and groove length-depth ratio. The maximum film stiffness obtained by the optimization method of considering the interaction effect of geometric parameters is about 11.4% which is larger than that obtained by the single factor optimization method in the given example.

Key words: dry gas seal, optimization, numerical analysis, stability, interaction effect

摘要：

为解决干气密封（DGS）端面型槽优化中未考虑型槽几何参数之间对目标函数交互影响而导致几何参数优化结果不准确的问题，研究了不同速度条件下DGS螺旋槽中其他几何参数对某一几何参数优选值的交互影响。基于气体润滑理论，建立了螺旋槽DGS的几何模型和数学模型，数值求解获得端面膜压分布和稳态性能参数，定义了综合表征螺旋槽几何结构的特征参数。以气膜刚度最大为优选目标，获得了不同速度条件下DGS螺旋槽中某一几何参数优选值随其他几何参数的变化规律。结果表明：DGS螺旋槽各几何参数两两之间呈现出复杂的交互影响关系，不过总体符合趋向于降低槽内实际通流面积、槽长宽比和槽长深比3个综合参数变化幅值的原则；与单因素优化方法相比，在给定算例参数条件下所提出的考虑几何参数交互影响的优化方法所获得气膜刚度最优值提高11.4%。

关键词: 干气密封, 优化, 数值分析, 稳定性, 交互影响

CLC Number:

TH117.2

JIANG Jinbo, CHEN Yuan, ZHAO Wenjing, LI Jiyun, PENG Xudong. Interaction effect of optimized value of geometric parameters of spiral groove of dry gas seal[J]. CIESC Journal, 2018, 69(4): 1518-1527.

江锦波, 陈源, 赵文静, 李纪云, 彭旭东. 干气密封螺旋槽几何参数优选交互影响[J]. 化工学报, 2018, 69(4): 1518-1527.

References 30

[1]	GARDNER J F. Rotary mechanical seal of the gap type:US3499653[P]. 1968-06-05.
[2]	ZOBENS A. Noncontacting face seal application for sealing gas at 105psig, 7000rpm[J]. Lubrication Engineering, 1975, 31(1):16-19.
[3]	GABRIEL R P. Fundamental of spiral groove noncontacting face seals[J]. Lubrication Engineering, 1994, 50:215-224.
[4]	FARIA M T C. An efficient finite element procedure for analysis of high speed spiral groove face seals[J]. ASME Journal of Tribology, 2001, 123(1):205-210.
[5]	SAXENA M N. Dry gas seals and support systems:benefits and options[J]. Hydrocarbon Processing, 2003, 82(11):37-41.
[6]	LIU Z, LIU Y, LIU X F. Optimization design of main parameters for double spiral grooves face seal[J]. Science in China Series E:Technological Sciences, 2007, 37(7):898-903.
[7]	蒋小文, 顾伯勤. 螺旋槽干气密封端面气膜特性[J]. 化工学报, 2005, 56(8):1419-1425. JIANG X W, GU B Q. Characteristics of gas film between spiral groove dry gas seal faces[J]. Journal of Chemical Industry and Engineering(China), 2005, 56(8):1419-1425.
[8]	JIANG J B, PENG X D, LI J Y, et al. A comparative study on the performance of typical types of bionic groove dry gas seal based on bird wing[J]. Journal of Bionic Engineering, 2016, 13(2):234-244.
[9]	江锦波, 彭旭东, 白少先, 等. 仿生集束螺旋槽干式气体密封特性的数值分析[J]. 机械工程学报, 2015, 51(15):20-26. JIANG J B, PENG X D, BAI S X, et al. Numerical analysis of characteristics of a bionic cluster spiral groove dry gas seal[J]. Journal of Mechanical Engineering, 2015, 51(15):20-26.
[10]	江锦波, 彭旭东, 白少先, 等. 仿鸟翼微列螺旋槽干气密封性能分析与选型[J]. 摩擦学学报, 2015, 35(3):274-281. JIANG J B, PENG X D, BAI S X, et al. Performance analysis and selection of a bionic bird wing multi-array spiral groove dry gas seal[J]. Tribology, 2015, 35(3):274-281.
[11]	ZIRKELBACK N. Parametric study of spiral groove gas face seals[J]. Tribology Transactions, 2000, 43(2):337-343.
[12]	LIU Y C, SHEN X M, XU W F, et al. Performance comparison and parametric study on spiral groove gas film face seals[J]. Science in China Series E:Technological Sciences, 2004, 47:29-36.
[13]	BONNEAU D, HUITRIC J, TOURNERIE B. Finite element analysis of grooved gas thrust bearings and grooved gas face seals[J]. ASME Journal of Tribology, 1993, 115(3):348-354.
[14]	GRIGOREV B S, SMIRNOV D B. Calculation of static characteristics of spiral-grooved thrust bearings over a wide compressibility range[J]. Journal of Machinery Manufacture and Reliability, 2013, 42(3):236-239.
[15]	SATOMI T, LIN G. Design optimization of spiral grooved thrust air bearing for polygon mirror laser scanners[J]. JSME International Journal Series C:Dynamic Control Robotics Design and Manufacturing, 1993, 36(3):393-399.
[16]	HASHIMOTO H, OCHIAI M. Optimization of groove geometric for thrust air bearing to maximize bearing stiffness[J]. ASME Journal of Tribology, 2008, 130(3):1-11.
[17]	SHELLEF R A, JOHNSON R P. A bi-directional gas face seal[J]. Tribology Transactions, 1992, 35(1):53-58.
[18]	LIPSCHIZE A, BASU P, JOHNSON R P. A bi-directional gas thrust bearing[J]. Tribology Transactions, 1991, 34(1):9-16.
[19]	刘向锋, 徐辰, 黄伟峰. 基于半解析法的极端工况干气密封动态特性研究与参数设计[J]. 清华大学学报(自然科学版), 2014, 54(2):223-228. LIU X F, XU C, HUANG W F. Analysis and parametric design of the dynamics of a dry gas seal for extreme operating conditions using a semi-analytical method[J]. Journal of Tsinghua University (Science and Technology), 2014, 54(2):223-228.
[20]	陈源, 彭旭东, 李纪云, 等. 螺旋槽结构参数对干气密封动态特性的影响研究[J]. 摩擦学学报, 2016, 36(4):397-404. CHEN Y, PENG X D, LI J Y, et al. The influence of structure parameters of spiral groove on dynamic characteristics of dry gas seal[J]. Tribology, 2016, 36(4):397-404.
[21]	ZIRKELBACK N, ANDRES L S. Effect of frequency excitation on force coefficients of spiral groove gas seals[J]. ASME Journal of Tribology, 1999, 121:853-861.
[22]	ZIRKELBACK N. Parametric study of spiral groove gas face seals[J]. Tribology Transactions, 2000, 43(2):337-343.
[23]	彭旭东, 张岳林, 白少先, 等. 转速压力对T型槽干气密封槽型几何结构参数优选值的影响[J]. 化工学报, 2012, 63(2):551-559. PENG X D, ZHANG Y L, BAI S X, et al. Effect of rotational speed and sealing medium pressure on optimization of groove geometric parameters of a T-groove dry gas face seal[J]. CIESC Journal, 2012, 63(2):551-559.
[24]	冯向忠, 彭旭东. 螺旋槽干式气体端面密封的刚度和泄漏量研究[J]. 石油大学学报(自然科学版), 2005, 29(2):83-85. FENG X Z, PENG X D. Study of stiffness and leakage rate of spiral groove dry gas face seals[J]. Journal of the University of Petroleum (Science and Technology), 2005, 29(2):83-85.
[25]	彭旭东, 江锦波, 白少先, 等. 中低压干气密封螺旋槽结构参数优化[J]. 化工学报, 2014, 65(11):4536-4542. PENG X D, JIANG J B, BAI S X, et al. Structural parameter optimization of spiral groove dry gas seal under low of medium pressure[J]. CIESC Journal, 2014, 65(11):4536-4542.
[26]	ZHAO Y C, YANG F. Steady-state optimization of a groove texture with different oil film thickness[J]. International Journal of Surface Science and Engineering, 2015, 9(5):385-394.
[27]	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 X D, JIANG J B, BAI S X, et al. Correlational research of bionics design of dry gas face seal groove[J]. Journal of Mechanical Engineering, 2014, 50(3):151-157.
[28]	彭旭东, 谭丽丽, 盛颂恩, 等. 带内环槽的螺旋槽干式气体端面密封的静压性能[J]. 摩擦学学报, 2008, 28(6):507-511. PENG X D, TAN L L, SHENG S E, et al. Static analysis of a spiral-groove dry gas seal with an inner annular groove[J]. Tribology, 2008, 28(6):507-511.
[29]	彭旭东, 黄莉, 白少先, 等. 雁型槽干式气体端面密封性能的数值分析[J]. 化工学报, 2010, 61(12):3193-3199. PENG X D, HUANG L, BAI S X, et al. Numerical analysis of sealing performance of dry gas seal with goose-grooves[J]. CIESC Journal, 2010, 61(12):3193-3199.
[30]	彭旭东, 呼延晨龙, 白少先, 等. 基于鸟翼轮廓的干式气体密封仿生型槽设计[J]. 摩擦学学报, 2012, 32(6):563-569. PENG X D, HUYAN C L, BAI S X, et al. Design of a biomorphic groove dry gas seal based on bird wing outlines[J]. Tribology, 2012, 32(6):563-569.