一种新型蜂窝密封的封严特性

doi:10.16085/j.issn.1000-6613.2017-1319

化工进展 ›› 2018, Vol. 37 ›› Issue (05): 1655-1663.DOI: 10.16085/j.issn.1000-6613.2017-1319

一种新型蜂窝密封的封严特性

李盼¹, 李勇¹, 曹丽华¹, 付亚辉², 王佳欣¹

1 东北电力大学能源与动力工程学院, 吉林吉林 132012;
2 国电民权发电有限公司, 河南商丘 476000

收稿日期:2017-06-30 修回日期:2017-09-07 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 李盼(1986-),男,博士研究生,从事汽轮机的经济运行与优化研究。
作者简介:李盼(1986-),男,博士研究生,从事汽轮机的经济运行与优化研究。E-mail:283395346@qq.com。
基金资助:
国家自然科学基金项目（51576036）。

Sealing characteristics of a new honeycomb seal

LI Pan¹, LI Yong¹, CAO Lihua¹, FU Yahui², WANG Jiaxin¹

1 School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China;
2 Guodian Minquan Generation Company, Shangqiu 476000, Henan, China

Received:2017-06-30 Revised:2017-09-07 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 为提高蜂窝密封的封严特性，改善转动机械的工作效率，本文在传统蜂窝密封基础上通过改变蜂窝的排列方式得到了一种新型蜂窝密封。采用ANSYS CFX软件对新型蜂窝密封和传统蜂窝密封内的三维流动情况进行了数值模拟，并引入泄漏系数，对这两种蜂窝密封在密封间隙、芯格直径、芯格深度、蜂窝壁厚、压比和转速变化时的封严特性进行了对比分析。结果表明：新型蜂窝密封在大压比、薄壁厚和小间隙下比传统蜂窝密封更具封严优势；当蜂窝密封的芯格直径为3.2mm时，新型蜂窝密封比传统蜂窝密封的泄漏系数减少了7.1%；改变蜂窝芯格深度，新型蜂窝密封的封严特性优于传统蜂窝密封。特别是当转速增加时，新型蜂窝密封内的周向漩涡更稳定，能量耗散更强，泄漏系数更小，密封效果更好。

关键词: 蜂窝密封, 数值模拟, 封严特性, 流动, 计算流体力学

Abstract: In order to improve the sealing characteristics of honeycomb seal and to increase the working efficiency of rotating machine,a new honeycomb seal was obtained by changing the arrangement of honeycomb on the basis of traditional honeycomb seal. The three-dimensional flow fields in the new and the traditional honeycomb seal were simulated, respectively, by using ANSYS CFX software. The sealing characteristics of the two different honeycomb seals were comparatively analyzed with the change in seal clearance,honeycomb cell diameter,cell depth,honeycomb wall thickness,pressure ratio and rotation speed by adopting the leakage coefficient. The results showed that the new honeycomb seal has better sealing characteristics than the traditional honeycomb seal in large pressure ratio,thin wall thickness and small seal clearance. When the core of honeycomb seal diameter is 3.2mm,the leakage coefficient of the new honeycomb seal is reduced by 7.1% compared with the traditional honeycomb seal and the sealing characteristics of new honeycomb seal have been superior to traditional honeycomb seal with the cell depth changing. Moreover,the circumferential vortex is more stable,the energy dissipation is stronger,the leakage coefficient is smaller and the sealing effect is better in the new honeycomb seal than in the traditional honeycomb seal with the rotation speed increasing.

Key words: honeycomb seal, numerical simulation, sealing characteristics, flow, CFD

中图分类号:

TH136

李盼, 李勇, 曹丽华, 付亚辉, 王佳欣. 一种新型蜂窝密封的封严特性[J]. 化工进展, 2018, 37(05): 1655-1663.

LI Pan, LI Yong, CAO Lihua, FU Yahui, WANG Jiaxin. Sealing characteristics of a new honeycomb seal[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1655-1663.

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一种新型蜂窝密封的封严特性

Sealing characteristics of a new honeycomb seal

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