| 杨任义,孟祥铠,赵文静,马艺,彭旭东.气液深冷介质典型动压端面密封性能对比[J].高技术通讯(中文),2025,35(10):1120~1132 |
| 气液深冷介质典型动压端面密封性能对比 |
| Comparison of seal performance typical dynamic pressure end face of gas-liquid cryogenic media |
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| DOI：10. 3772 / j. issn. 1002-0470. 2025. 10. 009 |
| 中文关键词: 深冷介质； 动压型槽； 有限单元法； 密封性能； 涡轮泵 |
| 英文关键词: cryogenic media, dynamic groove, finite element method, sealing performance, turbopump |
| 基金项目: |
| 作者 | 单位 | | 杨任义 | (浙江工业大学化工过程机械研究所杭州 310032) | | 孟祥铠 | | | 赵文静 | | | 马艺 | | | 彭旭东 | |
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| 摘要点击次数: 14 |
| 全文下载次数: 35 |
| 中文摘要: |
| 围绕液体火箭发动机推进剂（氧、甲烷、氢）和氮4种深冷介质，针对涡轮泵用非接触式机械密封，构建了一种同时适用于液态和气态的有限元流体润滑模型，考虑深冷介质在深冷气态和液态下的物性关系，研究了工况参数和槽深对4种槽型、2种相态4种介质下密封性能的影响规律。结果表明，液氧、液态甲烷相较于气态条件下具有更大的开启力，但质量泄漏率和摩擦功耗相对较大；气氢相较于液氢具有较大的开启力和液膜轴向刚度，且质量泄漏率更小，宜采用气膜密封；液氮可作为液氧的替代工质，气氮可作为气氧、气甲烷及气氢的替代工质进行相应的成膜特性实验；螺旋槽具有更强的流体动压效应，但产生的泄漏率也更大，人字形槽在2种相态下的泄漏率相对较小。 |
| 英文摘要: |
| Aiming at the four cryogenic media of liquid rocket engine fuel (oxygen, methane, hydrogen) and nitrogen, a fluid lubrication model suitable for both liquid and gaseous states is developed for the noncontacting mechanical seals used in turbopumps. Taking the physical properties of the cryogenic gas and liquid phase media into consideration, the sealing performance of four typical hydrodynamic grooves end face seals in the gas and liquid phases are comparatively studied. The effect of operating conditions and groove depth on the sealing performance of mechanical seals are systematically studied. The results show that liquid oxygen and liquid methane have greater opening force than the gaseous ones, but the mass leakage rate and power consumption are relatively large. The gaseous hydrogen has greater opening force and fluid film axial stiffness than liquid hydrogen. It is recommended to apply gas film seals because of its higher stiffness and lower mass leakage rate. The liquid nitrogen can be used as a substitute for liquid oxygen, and gaseous nitrogen as a substitute for gaseous oxygen, gaseous methane and gaseous hydrogen to carry out corresponding film-forming characteristics experiments. The spiral groove shows a stronger hydrodynamic effect than other grooves, but leads to a larger leakage rate. The leakage rate of the herringbone groove is relatively smaller than other grooves in both liquid and gaseous phase. |
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