针对鱼雷涡轮机径向双端面机械密封在高速、高温、高压等复杂极端工况下，内层密封发生泄漏的问题，基于热流固耦合仿真方法研究了其端面变形情况，结果表明，内、外层密封端面均产生沿半径增长方向逐渐变大的端面间隙，内层密封端面间隙大于外层，最大为0.04 mm。针对内层机械密封，比较动、静环端面单一热、力、热力耦合变形结果，并研究冷却水压力、密封端面宽度对其端面温度及变形的影响。结果表明，静环端面变形受温度影响较大，且力变形会抑制热变形，动环端面变形主要受温度影响；随冷却水压力增高，密封端面温度逐渐升高，静环端面变形略有减小，动环端面变形几乎不变；随密封端面宽度减小，端面温度逐渐升高，动环端面变形增大，最佳密封端面宽度为3.5 mm，静环端面变形随端面宽度减小而减小。
For the torpedo turbine radial double-end mechanical seal in high-speed, high-temperature, high-pressure and other complex and extreme conditions of the inner seal leakage problem, based on the thermal-fluid-solid coupling simulation method to study the deformation of its end face. The results show that: the inner and outer sealing end face along the direction of the growth of the radius of the end-face gap gradually become bigger, the inner seal end-face gap is larger than the outer, the maximum of 0.04 mm. For the inner mechanical seal, compared the rotating and static ring end face single thermal, force, thermal coupling deformation results, and studied the impact of cooling water pressure, sealing end face width on its end face temperature and deformation, the results show that: static ring end face deformation by the temperature is affected by the larger, and the force deformation will inhibit the thermal deformation, the rotating ring end face deformation is mainly affected by the temperature; cooling water pressure increases, the seal end face temperature gradually increased, the static ring end face deformation slightly reduced, the rotating ring end face deformation is almost unchanged; with the reduction of sealing endface width, the endface temperature gradually increases, the rotating ring endface deformation increases, the optimal sealing endface width is 3.5 mm, the static ring endface deformation with the reduction of the endface width and reduce.
2024,46(12): 121-127 收稿日期：2023-08-25
DOI：10.3404/j.issn.1672-7649.2024.12.021
分类号：U664
作者简介：赵天琦(1999-),男,硕士研究生,研究方向为能源动力推进技术
参考文献：
[1] 孙玉霞. 机械密封技术[M]. 北京: 化学工业出版社, 2014.
[2] 史小锋, 党建军, 梁跃等. 水下攻防武器能源动力技术发展现状及趋势[J]. 水下无人系统学报, 2021, 29(6): 634-647.
SHI Xiaofeng, DANG Jianjun, LIANG Yue, et al. Development status and trend of energy and power technology for underwater attack and defensive weapon[J]. Journal of Unmanned Undersea Systems, 2021, 29(6): 634-647.
[3] 王云祥. 机械密封失效分析和延长使用寿命的研究[D]. 北京: 北京化工大学, 2015.
[4] 顾广溪, 宋源森, 白少先. 弹性变形对泵用高速波度端面机械密封液体泄漏特性的影响[J]. 润滑与密封, 2023, 48(7): 184-189.
GU Guangxi, SONG Yuansen, BAI Shaoxian. Effect of elastic deformation on liquid leakage characteristics of pump high-speed waviness face mechanical seal[J]. Lubrication Engineering, 2023, 48(7): 184-189.
[5] 郑思敏, 滕黎明, 赵文静, 等. 交变工况下深海装备机械密封端面温升和磨损特性研究[J]. 上海交通大学学报, 2023, 57(8): 948-962.
ZHENG Simin, TENG Liming, ZHAO Wenjing, et al. Study on temperature rise and wear characteristics of mechanical seal face of deep-sea equipment under alternating conditions[J]. Journal of Shanghai Jiaotong University, 2023, 57(8): 948-962.
[6] 郭军刚, 宋振坤, 高春峰, 等. 伺服系统超高速机械密封热力变形分析与研究[J]. 重庆理工大学学报(自然科学), 2022, 36(4): 306-312.
GUO Jungang, SONG Zhenkun, GAO Chunfeng, et al. Analysis and study on thermal deformation of ultra high speed mechanical of servo system[J]. Journal of Chongqing University of Technology( Natural Science), 2022, 36(4): 306-312.
[7] 李彦启, 刘启东, 刘合荣, 等. 基于热力耦合的镶嵌式机械密封端面变形分析[J]. 润滑与密封, 2021, 46(9): 113-119.
LI Yanqi, LIU Qidong, LIU Herong, et al. Analysis of face deformation of mosaic type mechanical seals based on thermal-mechanical coupling[J]. Lubrication Engineering, 2021, 46(9): 113-119.
[8] 李勇凡, 宋勇, 郝木明, 等. 涡轮泵用球面装配机械密封热变形及磨损特性实验研究[J]. 中国工程机械, 2023, 34(13): 1550-1558.
LI Yongfan, SONG Yong, HAO Muming, et al. Experimental study of thermal deformation and wear characteristics of spherically-assembled mechanical seals for turbo pumps[J]. China Mechanical Engineering, 2023, 34(13): 1550-1558.
[9] XIE Fushou, LI Yanzhong, XIA Yuan, et al. Cooling behaviors of a novel flow channel in mechanical seals of extreme high-speed rotation for cryogenic rockets[J]. Cryogenics, 2020, 107: 1-12.
[10] 郑娆, 张敬博, 李双喜, 等. 船舶艉轴双端面密封端面热-力耦合变形及影响因素分析[J]. 流体机械, 2022, 50(12): 20-26.
ZHENG Rao, ZHANG Jingbo, LI Shuangxi, et al. Analysis of deformation and influencing factors of ship stern shaft double end face seal face heat-force coupling[J]. Fluid Machinery, 2022, 50(12): 20-26.
[11] 郑煜, 朱汉华, 任泓吉, 等. 船舶艉轴机械密封温度场与热变形分析[J]. 润滑与密封, 2021, 46(3): 110-118.
ZHENG Yu, ZHU Hanhua, REN Hongji, et al. Research on temperature field and thermal deformation of ship's stern shaft mechanical seal[J]. Lubrication Engineering, 2021, 46(3): 110-118.
[12] 樊智敏, 哈振骞, 李龙, 等. 深海机械密封端面摩擦及变形特性研究[J]. 润滑与密封, 2020, 45(9): 36-42.
FAN Zhimin, HA Zhenqian, LI Long, et al. Study on friction and deformation characteristics of end faces of deep-sea mechanical seal[J]. Lubrication Engineering, 2020, 45(9): 36-42.
