武怀彪,潘家保,汪奥.织构设计对润滑脂密封副密封特性影响的数值模拟[J].表面技术,2023,52(4):155-163, 191.
WU Huai-biao,PAN Jia-bao,WANG Ao.Numerical Simulation of Effect of Texture Design on Sealing Characteristics of Grease Sealing Pair[J].Surface Technology,2023,52(4):155-163, 191 |
| 织构设计对润滑脂密封副密封特性影响的数值模拟 |
| Numerical Simulation of Effect of Texture Design on Sealing Characteristics of Grease Sealing Pair |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.04.012 |
| 中文关键词: 润滑脂 密封副 织构化设计 泄漏控制 密封机理 非牛顿流体 |
| 英文关键词:grease sealing texture design leakage control sealing mechanism non-Newtonian fluid |
| 基金项目:国家自然科学基金(52005004);清华大学摩擦学国家重点实验室开放基金(SKLTKF21B02);南京航空航天大学直升机传动技术重点实验室开放课题(HTL-O-20G09) |
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| Author | Institution |
| WU Huai-biao | School of Mechanical Engineering, Anhui Polytechnic University, Anhui Wuhu 241000, China |
| PAN Jia-bao | School of Mechanical Engineering, Anhui Polytechnic University, Anhui Wuhu 241000, China;National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China |
| WANG Ao | School of Mechanical Engineering, Anhui Polytechnic University, Anhui Wuhu 241000, China |
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| 中文摘要: |
| 目的 探究织构设计对润滑脂密封副密封性能的影响规律，得到织构化设计的最佳结构参数和工况条件。方法 基于润滑脂Herschel-Bulkley流变模型和非接触机械密封原理，选择直线型沟槽织构建立端面密封模型。采用数值模拟方法分析不同倾斜角和转速下密封间隙的流场规律，进一步对密封副泄漏量的影响因素进行系统探究。结果 倾斜角不同，泄漏量随转速的变化规律不同。倾斜角为30°时，泄漏量随转速的提升而增大;倾斜角为35°时，泄漏量较小，且随转速变化不大;倾斜角为40°，且转速大于2 000 r/min时，泄漏量几乎为0;倾斜角大于等于45°，且转速大于1 000 r/min时，流体反向泵送，无泄漏。密封间隙和介质初始温度是影响泄漏的主要因素，泄漏量随密封间隙和介质温度的增大而增大。一定范围内，增加沟槽数量和长度也可减少泄漏。最佳织构参数和工况条件为倾斜角40°，槽数14，槽长8 mm，槽宽1.5 mm，密封间隙0.03 mm，槽深0.07 mm，温度小于320 K，转速大于2 000 r/min。结论 织构设计能有效抑制流体端面泄漏，润滑脂非牛顿特性对密封副间隙流场有显著影响，后续润滑脂密封副设计中应考虑流体的非牛顿特性。 |
| 英文摘要: |
| The work aims to investigate the effects of surface texture design and non-Newtonian characteristics of grease on sealing performance of grease seal pair, and obtain the optimal structural parameters and working conditions in texture design. Based on the Herschel-Bulkley rheological model of grease and the principle of non-contact mechanical seal, the viscose-temperature relationship of grease was fitted, and the linear groove texture was selected to establish the end seal model. The pressure distribution, temperature distribution and apparent viscosity distribution of seal end face flow field were obtained by numerical simulation. The influence law of different inclination angle and speed on seal clearance flow field was analyzed, and other factors affecting leakage, such as grease temperature, groove number, length, width, depth and seal clearance, were systematically explored. |
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