| 结构变形对高速齿轮箱直通式迷宫密封性能的影响分析 |
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| 引用本文： | 张雨,张开林.结构变形对高速齿轮箱直通式迷宫密封性能的影响分析[J].液压与气动,2019,0(3):14-18. |
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| 作者姓名： | 张雨 张开林 |
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| 作者单位： | 西南交通大学牵引动力国家重点实验室， 四川成都610031 |
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| 基金项目： | 国家自然科学基金(51675443，51735012)；牵引动力国家重点实验室自主研究课题(2017TPL_T2，2018TPL_T05) |
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| 摘 要： | 为了分析高速列车齿轮箱转子旋转造成的离心变形和热膨胀变形对迷宫密封性能的影响，建立齿轮箱直通式迷宫密封计算模型，在研究离心变形和热膨胀变形造成密封系统转子结构变形的基础上，基于Euler-Euler两相流模型，给出结构变形与泄漏量的关系曲线。研究结果表明：转子旋转离心变形和热膨胀变形减小了迷宫密封间隙，热膨胀变形高于转子旋转离心变形一个量级；工程应用中，低转速小半径转子结构可以忽略离心变形，但需要考虑转子的热膨胀变形。
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| 关 键 词： | 高速齿轮箱 直通式迷宫密封 结构变形 两相流 |
| 收稿时间： | 2018-08-31 |
Influence of Structural Deformation on Sealing Performance of High-speed Gearbox with Straight-through Labyrinth Seal |
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| ZHANG Yu,ZHANG Kai-lin.Influence of Structural Deformation on Sealing Performance of High-speed Gearbox with Straight-through Labyrinth Seal[J].Chinese Hydraulics & Pneumatics,2019,0(3):14-18. |
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| Authors: | ZHANG Yu ZHANG Kai-lin |
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| Affiliation: | State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan610031 |
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| Abstract: | In order to explore the influence of rotating-effect-induced centrifugal deformation and thermal-effect-induced expansive deformation of a high-speed gearbox on the performance of labyrinth seal, a calculation model of straight-through labyrinth seal is established. On the basis of analysis of structural deformation induced by centrifugal deformation and thermal-effect-induced expansive deformation, a relationship curve between structural deformation and leakage loss is given based on the Euler-Euler model. The results show that both the rotating-effect-induced centrifugal deformation and the thermal-effect-induced expansive deformation can reduce the labyrinth seal gap, and that the thermal-effect-induced expansive deformation exceeds the rotating-effect-induced centrifugal deformation by one order of magnitude. Therefore in engineering applications, the centrifugal deformation of low-speed and small-radius rotors can be neglected, but the expansive deformation should be taken into account. |
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| Keywords: | high-speed gearbox straight-through labyrinth seal structural deformation multiphase flow |
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