| 不同T形动压槽液膜密封性能对比分析 |
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| 引用本文： | 陈志,穆塔里夫·阿赫迈德,白云松.不同T形动压槽液膜密封性能对比分析[J].液压与气动,2021,0(7):71-76. |
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| 作者姓名： | 陈志 穆塔里夫·阿赫迈德 白云松 |
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| 作者单位： | 1.新疆大学机械工程学院, 新疆乌鲁木齐 830047;2.新疆大学电气工程学院, 新疆乌鲁木齐 830047 |
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| 基金项目： | 国家自然科学基金(51565056) |
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| 摘 要： | 针对T形槽机械密封摩擦副密封环端面间的液膜密封性能问题,建立了收敛形、直角形和发散形3种形式的动压槽液膜几何模型;并对3种不同形式动压槽的液膜流场进行了数值计算,得到了对应端面流场的压力分布。讨论了不同工况对3种槽形结构密封性能的影响并进行对比分析。结果表明:3种槽形结构的端面液膜压力分布规律相同,端面液膜压力均在左侧槽底部达到最大值,且动压槽两侧具有明显的压差,能够产生明显的动压特性;3种槽形结构的开启力和泄漏量均随着转速和压力的增大而增大,其中压力对密封性能的影响相对于转速对密封性能的影响较大;发散形槽比直角形和收敛形槽具有更强的动压特性,且拥有较高的开启力和较低的泄漏量,从而具有较好的密封性能。
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| 关 键 词： | 机械密封 动压槽 液膜流场 密封性能 |
| 收稿时间： | 2020-12-07 |
Comparative Analysis on Sealing Performance of Liquid Film in Different T-type Dynamic Pressure Groove |
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| CHEN Zhi,MUTELLIP Ahmat,BAI Yun-song.Comparative Analysis on Sealing Performance of Liquid Film in Different T-type Dynamic Pressure Groove[J].Chinese Hydraulics & Pneumatics,2021,0(7):71-76. |
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| Authors: | CHEN Zhi MUTELLIP Ahmat BAI Yun-song |
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| Affiliation: | 1. School of Mechanical Engineering, Xinjiang University, Urumqi, Xinjiang830047;2. School of Electrical Engineering, Xinjiang University, Urumqi, Xinjiang830047 |
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| Abstract: | In order to solve the problem of liquid film sealing performance between the surface of friction pair sealing ring of T-groove mechanical seal, establishing three geometric models of liquid film of dynamic pressure groove: convergent, right-angle and divergent. The flow field of the liquid film was numerically calculated and the pressure distribution of the flow field at the end face is obtained. The influence of different working conditions on the sealing performance of three kinds of groove structures is discussed and compared. The results show that the pressure distribution of liquid film on the surface of three kinds of groove structures is the same. Both reach their maximum at the bottom of the left slot groove, and there is an obvious pressure difference on both sides of the dynamic pressure groove, which can produce obvious dynamic pressure characteristics. The opening force and leakage of the three kinds of groove structure increase with the increase of rotating speed and pressure, and the influence of pressure on sealing performance is greater than that of rotating speed. The divergent groove has stronger dynamic pressure characteristics, higher opening force and lower leakage, so it has better sealing performance than the right-angle and convergent groove. |
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| Keywords: | mechanical seal dynamic pressure groove liquid film flow field sealing performance |
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