高速环形槽-螺旋槽机械密封液膜黏性热效应分析

兰州理工大学学报 ›› 2026, Vol. 52 ›› Issue (3): 61-71.

高速环形槽-螺旋槽机械密封液膜黏性热效应分析

张伟政^*1, 韩东民¹, 赵吉军^1,2, 林华¹, 刘经纬¹, 黄文彬¹

1.兰州理工大学石油化工学院, 甘肃兰州 730050;
2.中核工程咨询有限公司西北分公司, 甘肃兰州 730050

收稿日期:2023-10-25 出版日期:2026-06-28 发布日期:2026-06-30
通讯作者: 张伟政(1978-),男,甘肃白银人,博士,副教授.Email:zhangweiz@163.com
基金资助:
甘肃省自然科学基金(18JR3RA145)

Analysis of viscous thermal effect of liquid film of high speed annular groove and spiral groove mechanical seal

ZHANG Wei-zheng¹, HAN Dong-min¹, ZHAO Ji-jun^1,2, LIN Hua¹, LIU Jing-wei¹, HUANG Wen-bin¹

1. School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. China Nuclear Engineering Consulting Co. Ltd. Northwest Branch, Lanzhou 730050, China

Received:2023-10-25 Online:2026-06-28 Published:2026-06-30

摘要/Abstract

摘要： 高速工况下动环强剪切作用于端面间隙内润滑流体产生大量黏性热,对环形槽-螺旋槽复合式机械密封模型(ASG)的流体动力润滑(HD)及热流体动力润滑特性(THD)进行分析,揭示液膜黏性热效应对机械密封各项性能的影响机理,分析ASG模型的几何参数对密封性能的影响规律.结果表明:HD与THD模型的压力分布类似,但考虑黏性热效应后,ASG模型的动压效应会减弱;静环端面非槽区温度明显高于槽区,动环端面温度略低于静环,液膜及动、静环温度均由外径侧向内径侧逐渐升高;在不同的几何参数与工况参数下,THD模型对液膜开启力与摩擦系数的预测值均小于HD模型,转速的增加导致动静环温度的增加,槽宽比、槽坝比及密封间隙的增加,有利于降低温度,但导致较大的泄漏率,持续增加槽深并不能达到降温的效果,以降温为优化目标,仍存在最优槽深.

关键词: 机械密封, 热流体动力润滑, 环形槽, 螺旋槽

Abstract: At high speeds, substantial viscous heat is generated in the lubricating fluid of end clearance by the strong shearing action of the rotor. The hydrodynamic lubrication (HD) and thermal hydrodynamic lubrication (THD) characteristics of the annular fluid-spiral groove composite mechanical seal (ASG) model are numerically analyzed. The influence mechanism of liquid film viscous thermal effects on mechanical seal performance is clarified, and the influence laws of ASG geometric parameters on seal performance are investigated. The results indicate that similar pressure distributions are presented by HD and THD models, whereas the hydrodynamic pressure effect of the ASG model is weakened when viscous thermal effects are considered. A significantly higher temperature is observed in the non-grooved zone of the stator end face compared with the grooved zone, while a slightly lower temperature is detected on the rotor end face than on the stator end face. The temperatures of the liquid film, rotor and stator are all gradually increased from the outer diameter to the inner diameter. Under various geometric parameters and working conditions, lower predicted liquid film opening force and friction coefficient values are obtained by the THD model than by the HD model. Rotor temperature is raised with the increase of rotational speed. Larger groove width ratio, groove dam ratio and sealing gap are conducive to temperature reduction but result in an increased leakage rate. Effective temperature reduction cannot be achieved by simply increasing groove depth, and an optimal groove depth is available for thermal management optimization.

Key words: mechanical seal, thermohydrodynamic lubrication, annular groove, spiral groove

中图分类号:

TQ051

张伟政, 韩东民, 赵吉军, 林华, 刘经纬, 黄文彬. 高速环形槽-螺旋槽机械密封液膜黏性热效应分析[J]. 兰州理工大学学报, 2026, 52(3): 61-71.

ZHANG Wei-zheng, HAN Dong-min, ZHAO Ji-jun, LIN Hua, LIU Jing-wei, HUANG Wen-bin. Analysis of viscous thermal effect of liquid film of high speed annular groove and spiral groove mechanical seal[J]. Journal of Lanzhou University of Technology, 2026, 52(3): 61-71.

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链接本文: https://journal.lut.edu.cn/CN/

https://journal.lut.edu.cn/CN/Y2026/V52/I3/61

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