中国石油大学学报（自然科学版）2023，Vol.47Issue(6)：138-145,8.DOI:10.3969/j.issn.1673-5005.2023.06.016
波度动压机械密封的性能分析与优化选型
Performance analysis and optimized model selection of wavy hydrodynamic mechanical seals
摘要
Abstract
Based on the cavitation boundary condition of mass conservation,the theoretical model of the lubricating liquid film on the wavy seal end face was established.The Reynolds' equation of lubricating liquid film was solved using the finite element method,and the laws of sealing performance under different conditions and geometric parameters were obtained,which were compared with the experimental results.The results show that by increasing the pressure and the rotation speed,the leakage rate and liquid film stiffness will be both increased,and the hydrodynamic effect will be enhanced.This charac-teristic will improve the stable operation of the seal,but the low pressure may prone the liquid film to cavitation.Meanwhile,the temperature has no effect on the minimum thickness of the liquid film,but has a slight effect on the hydrodynamic effect,while the hydrodynamic effect decreases with the increase of temperature.The increase of wave number and amplitude will both increase the minimum liquid film thickness and the leakage rate.This effect will also increase the liquid film stiffness and the hydrostatic effect.In addition,the increase of wave amplitude will reduce the liquid film stiffness and the hydrody-namic effect conversely.By comprehensively considering the leakage rate and stability of seal operation,the wave number of the wavy end face is 9 and the wave amplitude is 6.3 μm,which are more reasonable and more suitable for the operation of the shaft seal for reactor coolant pump.关键词
核主泵/机械密封/波形端面/液膜空化/有限元法Key words
reactor coolant pump/mechanical seal/wavy end-face/liquid film cavitation/finite element method分类
信息技术与安全科学引用本文复制引用
苏文涛,胡世宏,王磊,冯晓东..波度动压机械密封的性能分析与优化选型[J].中国石油大学学报（自然科学版）,2023,47(6):138-145,8.基金项目
国家自然科学基金面上项目(51976043) （51976043）
