干气密封螺旋槽几何参数优选交互影响

doi:10.11949/j.issn.0438-1157.20170857

化工学报 ›› 2018, Vol. 69 ›› Issue (4): 1518-1527.DOI: 10.11949/j.issn.0438-1157.20170857

干气密封螺旋槽几何参数优选交互影响

江锦波, 陈源, 赵文静, 李纪云, 彭旭东

浙江工业大学过程装备及其再制造教育部工程研究中心, 浙江杭州 310014

收稿日期:2017-07-05 修回日期:2017-09-06 出版日期:2018-04-05 发布日期:2018-04-05
通讯作者: 彭旭东
基金资助:
国家自然科学基金项目（51575490，51705458）；浙江省自然科学基金重点项目（LZ15E050002）；浙江省自然科学基金青年基金项目（LQ17E050008，LQ16E050009）。

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

JIANG Jinbo, CHEN Yuan, ZHAO Wenjing, LI Jiyun, PENG Xudong

Engineering Research Center of Process Equipment and Its Remanufacturing of Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China

Received:2017-07-05 Revised:2017-09-06 Online:2018-04-05 Published:2018-04-05
Supported by:
supported by the National Natural Science Foundation of China (51575490, 51705458), the Key Program of Zhejiang Provincial Natural Science Foundation (LZ15E050002) and the Zhejiang Provincial Natural Science Foundation (LQ17E050008, LQ16E050009).

摘要/Abstract

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

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

中图分类号:

TH117.2

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.

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.

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干气密封螺旋槽几何参数优选交互影响

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

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