Unified model and geometrical optimization of bi-directional groove of dry gas seal based on genetic algorithm

Qichao XU; Jinbo JIANG; Xudong PENG; Jiyun LI; Yuming WANG

doi:10.11949/j.issn.0438-1157.20181075

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Unified model and geometrical optimization of bi-directional groove of dry gas seal based on genetic algorithm

Surface and interface engineering | 更新时间：2026-07-24

- Unified model and geometrical optimization of bi-directional groove of dry gas seal based on genetic algorithm
- CIESC Journal Vol. 70, Issue 3, Pages: 995-1005(2019)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181075
  CLC： TH 117.2
- Received：26 September 2018，
  
  Revised：2018-12-20，
  
  Online First：24 July 2026，
  
  Published：05 March 2019
- 稿件说明：
移动端阅览
徐奇超, 江锦波, 彭旭东, 李纪云, 王玉明. 基于遗传算法的干气密封双向槽统一模型与参数优化[J]. 化工学报, 2019, 70(3): 995-1005

XU Qichao, JIANG Jinbo, PENG Xudong, LI Jiyun, WANG Yuming. Unified model and geometrical optimization of bi-directional groove of dry gas seal based on genetic algorithm[J]. CIESC Journal, 2019, 70(3): 995-1005
徐奇超, 江锦波, 彭旭东, 李纪云, 王玉明. 基于遗传算法的干气密封双向槽统一模型与参数优化[J]. 化工学报, 2019, 70(3): 995-1005 DOI： 10.11949/j.issn.0438-1157.20181075.

XU Qichao, JIANG Jinbo, PENG Xudong, LI Jiyun, WANG Yuming. Unified model and geometrical optimization of bi-directional groove of dry gas seal based on genetic algorithm[J]. CIESC Journal, 2019, 70(3): 995-1005 DOI： 10.11949/j.issn.0438-1157.20181075.

摘要

通过提出表征能力更强的新型结构模型和引入全局寻优能力更强的智能优化算法以提高双向旋转槽干气密封的稳态密封性能。在综合分析国内外干气密封典型双向旋转槽结构特点的基础上，提出一种动压槽倾角可变的双向旋转槽统一模型。建立双向旋转槽干气密封的几何模型和数学模型，采用有限差分法求解端面膜压控制方程，获得开启力和气膜刚度等稳态性能参数。分析了动压槽倾斜角对干气密封稳态性能的影响规律，对比分析了不同速度条件下单因素优化、迭代优化和遗传算法优化等三种优化方法对提高双向旋转槽干气密封稳态性能的作用。结果表明：相较于以往双向树形槽干气密封单因素优化的结果，基于遗传算法的统一模型槽干气密封获得的开启力和气膜刚度显著提高，最大增幅分别达到6%和55%；在高速条件下，上游动压槽螺旋角为锐角，下游动压槽螺旋角为钝角的似机翼形双向旋转槽干气密封具有最大的开启力和气膜刚度。

Abstract

The steady-state performance of bi-directional groove dry gas seal can be enhanced by new proposed geometrical model with strong representational capability and new introduced optimization method with strong global search ability. On the basis of analyzing the structural characteristics of typical bi-directional grooves of dry gas seals

a new type of unified model of bi-directional groove with variable spiral angle of hydrodynamic groove was proposed. The geometrical model and mathematical model of dry gas seal with unified model groove were established. The gas film pressure control equations were resolved by use of finite difference method

and the steady-state performance

such as opening force and film stiffness

were obtained. The effect of spiral angle of upstream and downstream hydrodynamic groove on steady-state performance was analyzed

and effect of three typical optimization methods

including single factor optimization

iterative optimization and genetic algorithm optimization

on the enhancement of steady-state performance of bi-directional groove under different working conditions were compared numerically. The results show that compared with the single-factor optimization of the two-way tree-shaped groove dry gas seal

the opening force and film stiffness obtained by the unified model groove dry gas seal based on genetic algorithm are significantly improved

and the maximum increase is 6% and 55% respectively. The bi-directional groove shaped like an aircraft wing with upstream spiral angle equals to 0°—90° and downstream spiral angle equals to 90°—180° possesses the maximum opening force and film stiffness under high-speed condition.

关键词

Keywords

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