考虑刷丝时变磨损的刷式密封摩擦磨损特性求解模型

兰可心; 赵欢; 孙丹; 杨泽敏; 徐文峰; 孙基生

doi:10.13224/j.cnki.jasp.20230399

考虑刷丝时变磨损的刷式密封摩擦磨损特性求解模型

doi: 10.13224/j.cnki.jasp.20230399

兰可心^{1, 2},
赵欢^{1, 2},
孙丹^{1, 2,*, ,},
杨泽敏^{1, 2},
徐文峰^{1, 2},
孙基生^{1, 2}

1.
沈阳航空航天大学航空发动机学院辽宁省航空推进系统先进测试技术重点实验室，沈阳 110136
2.
沈阳航空航天大学沈阳市透平机械先进密封技术重点实验室，沈阳 110136

基金项目: 国家自然科学基金（52075346）；辽宁省“兴辽英才计划”资助项目（XLYC2007077）；中国航空发动机集团产学研合作项目（HFZL2021CXY012）；辽宁省自然科学基金（面上项目）（2022-MS-301）

详细信息

作者简介:
兰可心（1998-），男，硕士，主要从事刷式密封摩擦磨损特性研究

通讯作者:
孙丹（1981-），男，教授、博士生导师，博士，主要从事航空发动机先进密封技术研究。E-mail：phd_sundan@163.com

中图分类号: V233.2
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出版历程
- 收稿日期: 2023-06-20
- 网络出版日期: 2024-12-19

Solving model of friction and wear characteristics of brush seal considering time-varying wear of brush wire

LAN Kexin^{1, 2},
ZHAO Huan^{1, 2},
SUN Dan^{1, 2,*
, ,},
YANG Zemin^{1, 2},
XU Wenfeng^{1, 2},
SUN Jisheng^{1, 2}

1.
Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System，School of Aero-engine，Shenyang Aerospace University，Shenyang 110136，China
2.
Key Laboratory of Turbomachinery Advanced Seal Technology，Shenyang Aerospace University，Shenyang 110136，China

摘要

摘要:
提出基于Euler-Bernoulli梁理论和Archard磨损理论耦合方法考虑刷丝时变磨损的刷式密封摩擦磨损特性求解模型，分析刷式密封刷丝自由端与转子表面法向接触力、磨损率与磨损量，设计搭建基于柱面圆周摩擦方式的刷式密封摩擦磨损特性实验装置，在实验验证求解模型准确性的基础上，研究刷式密封工况参数与结构参数对刷式密封摩擦磨损特性的影响规律。研究结果表明：刷丝自由端与转子表面法向接触力与磨损率随摩擦时长的增加均呈对数型减小，最终趋近于0；磨损量随摩擦时长的增加先呈对数型增加，最终趋于稳定，在转速为2000 r/min和干涉量为0.4 mm时，刷丝磨损主要发生在前20 h，在第50 h时刷丝的磨损量趋于稳定；刷丝法向接触力、磨损率与磨损量均随着干涉量与刷丝束厚度的增加而增大，且磨损量与其呈线性增长关系；而随着转速、刷丝径向长度与刷丝直径的增大以及刷丝倾角的减小，刷丝法向接触力与磨损率变化曲线的下降速率越快，刷丝达到最大磨损量的时间越短。
- 刷式密封 /
- Euler-Bernoulli梁理论 /
- Archard磨损理论 /
- 刷丝时变磨损 /
- 摩擦磨损特性
Abstract:
Based on Euler-Bernoulli beam theory and Archard wear theory coupling method, a solution model of brush seal friction and wear characteristics considering time-varying wear of brush wire was proposed. The normal contact force, wear rate and wear loss between the free end of brush wire and the rotor surface were analyzed. The experimental device of brush seal friction and wear characteristics based on cylindrical circumferential friction was designed and built. On the basis of experimental verification of the accuracy of the solution model, the influences of working condition parameters and structural parameters of brush seal on the friction and wear characteristics of brush seal were studied. The results showed that the normal contact force and wear rate between the free end of the brush wire and the rotor surface decreased logarithmically with the increase of the friction time, and finally approached 0. The wear loss increased logarithmically with the increase of friction time, and finally became stable. When the rotation speed was 2000 r/min and the interference amount was 0.4 mm, the wear of the brush wire mainly occurred in the first 20 h, and the wear of the brush wire became stable at the 50 h. The normal contact force, wear rate and wear amount of the brush wire increased with the increase of the interference amount and the thickness of the brush wire, and the wear amount also increased linearly. With the increase of rotational speed, radial length and diameter of the brush wire and the decrease of the inclination angle of the brush wire, the decrease rate of the normal contact force and wear rate curve of the brush wire was faster, and the time for the brush wire to reach the maximum wear amount was shorter.
- brush seal /
- Euler-Bernoulli beam theory /
- Archard wear theory /
- time-varying wear of brush wire /
- friction and wear characteristics

HTML

图 1 刷丝受力分析图

Figure 1. Brush wire force analysis diagram

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图 2 刷丝Euler-Bernoulli模型图

Figure 2. Brush Euler-Bernoulli model diagram

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图 3 考虑刷丝时变磨损的刷式密封摩擦磨损特性模型求解流程图

Figure 3. Flow chart of friction and wear characteristics model of brush seal considering time-varying wear of brush wire

下载: 全尺寸图片幻灯片

图 4 刷丝束排列方式

Figure 4. Brush tow arrangement

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图 5 基于柱面圆周摩擦的刷式密封摩擦磨损特性实验装置实物图

Figure 5. Photos of experimental setup of friction and wear characteristics of brush seal based on cylindrical circumferential friction

下载: 全尺寸图片幻灯片

图 6 刷式密封摩擦磨损特性求解模型计算结果与实验测量结果验证

Figure 6. Calculation results of friction and wear characteristics of brush seal wire were verified by experimental measurement

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图 7 刷式密封摩擦磨损特性随摩擦时长变化曲线

Figure 7. Variation curve of friction and wear characteristics of brush seal wire with friction time

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图 8 不同干涉量下刷式密封摩擦磨损特性随摩擦时长变化曲线

Figure 8. Variation curve of friction and wear characteristics of brush seal wire with friction time under different interference amounts

下载: 全尺寸图片幻灯片

图 9 不同转速下刷式密封摩擦磨损特性随摩擦时长变化曲线

Figure 9. Variation curve of friction and wear characteristics of brush seal wire with friction time under different speeds

下载: 全尺寸图片幻灯片

图 10 不同刷丝径向长度下刷式密封摩擦磨损特性随摩擦时长变化曲线

Figure 10. Variation curve of friction and wear characteristics of brush seal wire with friction time under different radial lengths of brush wire

下载: 全尺寸图片幻灯片

图 11 不同刷丝倾角下刷式密封摩擦磨损特性随摩擦时长变化曲线

Figure 11. Variation curve of friction and wear characteristics of brush seal wire with friction time under different brush wire inclination angles

下载: 全尺寸图片幻灯片

图 12 不同刷丝束厚度下刷式密封摩擦磨损特性随摩擦时长变化曲线

Figure 12. Variation curve of friction and wear characteristics of brush seal wire with friction time under different thickness of brush tow

下载: 全尺寸图片幻灯片

图 13 不同刷丝直径下刷式密封摩擦磨损特性随摩擦时长变化曲线

Figure 13. Variation curve of friction and wear characteristics of brush seal wire with friction time under different brush wire diameters

下载: 全尺寸图片幻灯片

表 1 实验件主要结构参数

Table 1. Main structural parameters of experimental specimen

参数数值

刷丝径向长度H/mm 10.50
刷丝直径d/mm 0.10
刷丝倾角θ/（°） 45.00
刷丝束厚度B/mm 1.20
转子半径R_s/mm 180.00

下载: 导出CSV

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