超高速径向双端面机械密封温度场分析  

Temperature field analysis of ultra-high speed radial double-face mechanical seal

作　　者：赵天琦 伊进宝 文孟刚 肖炎彬 史小锋 潘阳 ZHAO Tianqi;YI Jinbao;WEN Menggang;XIAO Yanbin;SHI Xiaofeng;PAN Yang(The 705 Research Institute of CSSC,Xi'an 710077,China)

机构地区：[1]中国船舶集团有限公司第七〇五研究所,陕西西安710077

出　　处：《舰船科学技术》2024年第18期70-75,共6页Ship Science and Technology

摘　　要：为提高鱼雷涡轮机超高速径向双端面机械密封工作可靠性,建立机械密封热-流耦合仿真模型,分析机械密封运行时的端面温度特征,研究动环流水槽和动环转速对密封端面温度的影响。结果表明,内层密封端面温度沿半径增长方向先增大再减小,最高为150℃;外层密封端面温度沿半径增长方向逐渐升高,最高温度为210℃,高于冷却水汽化温度195℃,外层密封泄漏风险较高。机械密封动环流水槽可有效增强其冷却效果,密封端面温度随流水槽深度增加而降低,当流水槽深度为3 mm时,外层密封端面最高温度为188℃,低于冷却水汽化温度。内、外层密封端面温度均随动环转速上升而增加,当转速从10000 r/min增长到50000 r/min,内层密封端面最高温度从60℃增长至125℃,外层密封端面最高温度从70℃增长至185℃。In order to improve the reliability of the ultra-high-speed radial double-end mechanical seal of the torpedo turbine,a thermal-fluid coupling simulation model of the mechanical seal was established.The temperature characteristics of the end face during the operation of the mechanical seal was analyzed,and the influence of the water groove of rotating ring and the rotating speed of the rotating ring on the temperature of the seal end face were studied.The results show that the temperature of the inner seal end face increases first and then decreases along the radius growth direction,with a maximum of 150°C.The temperature of the outer seal end face gradually increases along the radius growth direction,with a maximum temperature of 210°C,which is higher than the cooling water vaporization temperature of 195°C,and the leakage risk of the outer seal is higher.The water groove of rotating ring of mechanical seal can effectively enhance its cooling effect.The temperature of the seal end face decreases with the increase of the depth of the water groove.When the depth of the water groove is 3 mm,the maximum temperature of the outer seal end face is 188°C,which is lower than the vaporization temperature of the cooling water.The temperature of the inner and outer seal faces increases with the increase of the rotating speed of the rotating ring.When the rotating speed increases from 10000 r/min to 50000 r/min,the maximum temperature of the inner seal face increases from 60℃to 125℃,and the maximum temperature of the outer seal face increases from 70℃to 185℃.

关 键 词：超高速 径向双端面 机械密封 端面温度 

分 类 号：U664[交通运输工程—船舶及航道工程]