| 引用本文: | 徐乙人,祁志浩,李永健,赵炬颖,马婷.刷式密封高温摩擦磨损行为*[J].中国表面工程,2022,35(3):114~121 |
| XU Yiren,QI Zhihao,LI Yongjian,ZHAO Juying,MA Ting.Friction and Wear Behaviors of Brush Seal under High Temperature[J].China Surface Engineering,2022,35(3):114~121 |
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| 摘要: |
| 刷式密封能够提升各类透平机械的性能，近年来航空发动机对刷式密封提出了更高的工作温度要求。为研究高温条件下跑道对刷丝尖端的磨损作用，针对性地研制基于电磁加热原理的刷式密封高温磨损试验设备，并成功完成 GH5605 材料的刷封试样与转子跑道之间的高温高速磨损试验，试验温度达到 700 ℃，试验线速度达到 100 m / s。为研究刷丝柱面的高温摩擦磨损行为，基于 SRV 摩擦磨损试验机开展刷丝柱面模拟磨损试验。研究结果表明：刷丝尖端与跑道耐磨涂层之间的磨损机理以磨粒磨损为主，随着跑道温度升高，刷丝尖端附着的氧化物增加，并可使刷丝柱面产生粗糙氧化层；温度对刷丝柱面的磨损行为有显著影响，常温条件下刷丝柱面呈现出显著的黏着磨损特征，在 300 ℃和 700 ℃的试验温度条件下，氧化现象削弱了刷丝柱面的黏着磨损作用，并使其摩擦因数和磨损速率降低。研究结果揭示了刷式密封的磨损机理及高温条件对其磨损行为的影响，可为提升刷式密封的磨损性能提供理论指导。 |
| 关键词: 航空发动机 刷式密封 高温 磨粒磨损 黏着磨损 |
| DOI：10.11933/j.issn.1007-9289.20211102002 |
| 分类号:TH117 |
| 基金项目:国家科技重大专项(2017-VII-0013-0110)；中国航空发动机集团产学研合作(HFZL2018CXY003-2)；摩擦学国家重点实验室自主研究课题(SKLT2019B07)资助项目 |
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| Friction and Wear Behaviors of Brush Seal under High Temperature |
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XU Yiren1, QI Zhihao1, LI Yongjian1, ZHAO Juying1, MA Ting2
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1.State Key Laboratory of Tribology, Tsinghua University, Beijing 100084 , China;2.Key Laboratory of Power Transmission Technology on Aero-engine,AECC Shenyang Engine Research Institute, Shenyang 110015 , China
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| Abstract: |
| The performance of turbomachinery can be improved by using brush seals. In recent years, brush seals are required to work at higher temperature by advanced aero-engines. In order to study the wear behaviors between brush bristle tips and rotor, a high temperature wear test rig based on electromagnetic heating is developed, and a wear test for GH5605 superalloy brush bristles is completed with a temperature up to 700 ℃ and a line speed up to 100m/s. In order to study the friction and wear behaviors at brush bristle cylindrical surfaces, an other wear test is completed based on SRV friction and wear testing machine. The test results show that the wear mechanism between the bristle tips and the wear-resistant coating on rotor surface is mainly abrasive wear. As the temperature rising, the oxide at bristle tips increases and rough oxide layers may appear on the brush bristle cylindrical surfaces. The temperature has a significant effect on the wear behaviors of brush bristle cylindrical surfaces. The cylindrical surfaces show adhesive wear characteristics under room temperature. However, when the test temperature reaches to 300 ℃ and 700 ℃, the oxidation of brush bristle cylindrical surfaces weakens the adhesive wear effect, and reduces the friction factor and wear rate. The research reveals the wear mechanism of brush seal and the influence of high temperature conditions, which provides theoretical guidance for improving the wear performance of brush seal. |
| Key words: aero-engine brush seal high temperature abrasive wear adhesive wear |
