| 疏水表面的自密封性对机械密封性能的影响 |
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| 引用本文： | 彭旭东,刘鑫,孟祥铠,李纪云,盛颂恩.疏水表面的自密封性对机械密封性能的影响[J].化工学报,2011,62(5):1365-1370. |
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| 作者姓名： | 彭旭东 刘鑫 孟祥铠 李纪云 盛颂恩 |
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| 作者单位： | 浙江工业大学过程装备及其再制造教育部工程研究中心，浙江 杭州 310032 |
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| 基金项目： | 国家自然科学基金项目，浙江省自然科学基金杰出青年团队项目，浙江省自然科学基金项目，浙江省科技计划资助项目 |
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| 摘 要： | 液体润滑机械密封正常运行时,端面间的膜厚一般为1～15μm,液体表面张力对密封性能的影响不可忽略.本文以激光加工多孔端面机械密封(LST-MS)为研究对象,提出了疏水型面的几何结构模型,从理论上证明了疏水型面的自密封性;采用有限元方法求解雷诺方程,分析了密封介质表面张力系数在不同转速、不同介质压力等操作条件下对端面液膜...
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| 关 键 词： | 机械密封 微孔端面 疏水型面 自密封 液体表面张力系数 |
Influence of self-sealing performance of hydrophobic surface on face of mechanical seal |
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| PENG Xudong,LIU Xin,MENG Xiangkai,LI Jiyun,SHENG Song'en.Influence of self-sealing performance of hydrophobic surface on face of mechanical seal[J].Journal of Chemical Industry and Engineering(China),2011,62(5):1365-1370. |
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| Authors: | PENG Xudong LIU Xin MENG Xiangkai LI Jiyun SHENG Song'en |
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| Abstract: | The lubrication film thickness developed between the two faces in a mechanical seal normally ranges in size from 1 to 15 μm.Therefore the influence of the surface tension of sealing medium cannot be ignored.In this paper a study of sealing ability of a laser-textured surface mechanical seal(LST-MS)with hydrophobic surface located at the inner radius was performed.The geometrical models of hydrophobic surface with nano-columns or nano-pores were presented, and their self-sealing ability was theoretically proved.The Reynolds equation for controlling film pressure between the two faces of such a LST-MS was solved by using the finite element method.The effects of surface tension coefficients of the sealing medium on film stiffness, opening force and leakage rate were studied at different rotational speeds and sealing pressures.It was proved theoretically that such a LST-MS could get zero-leakage under specific conditions.The results showed that when the LST-MS operated at the rotational speeds lower than 100 r·min-1 and low fluid pressure ratios lower than 2, film stiffness and opening force were kept high while leakage was substantially decreased.The film thickness fluctuation would take place due to external perturbation, but leakage would be controlled by using barrier fluids or flushing fluids with high surface tension coefficients.The width ratio of hydrophobic face to seal face was optimized in the range from 0.01 to 0.10. |
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