船舶艉轴双端面密封端面热-力耦合变形及影响因素分析  

Analysis of face heat-force coupled deformation and influencing factors of double end face seal for ship stern shaft

作　　者：郑娆[1] 张敬博 李双喜[1] 贾宇宁 魏文豪 ZHENG Rao;ZHANG Jingbo;LI Shuangxi;JIA Yuning;WEI Wenhao(Beijing University of Chemical Technology,School of Mechanical and Electrical Engineering,Beijing 100029,China)

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《流体机械》2022年第12期20-26,共7页Fluid Machinery

基　　金：国家重点研发计划项目(2018YFB2000800)。

摘　　要：针对在深海湖泊等复杂极端工况下船舶艉轴由于密封端面变形产生过大间隙,导致泄漏的问题,通过建立船舶艉轴热-力耦合分析模型,分析不同工况下,3组典型密封端面材料组对(YNW8-M106D、SiC-M106D、S30408-M106D)的密封环端面温度、应力及变形变化规律;分析海水环境下材料、转速及弹簧比压等主要影响因素及密封端面变形的影响及影响程度和权重。结果表明:转速升高100%,使得密封端面温度、应力及变形增加35%,43%及49%,弹簧比压升高100%,使得密封端面温度、应力及变形增加17%,5%及14%,应限制其最大值,防止密封失效;材料的热膨胀系数及导热系数对密封端面的影响最大,合理选取动静环材料有利于减少端面变形;选取出适合转速400 r/min、弹簧比压0.2工况下的最优材料(Si C-M106D)配对,使得船舶艉轴平衡可靠并长寿命运转。本文的模型和计算方法可为船舶艉轴密封结构的设计提供参考。In order to solve the leakage problem of ship stern shaft due to the deformation of seal end face caused by too large clearance under complicated extreme conditions such as deep sea lake,the thermal-mechanical coupling analysis model of ship stern shaft was established by finite element numerical simulation method,and the temperature,stress and deformation of seal ring end face of three groups of typical seal end face material pairs(YNW8-M106D,Sic-M106D,S30408-M106D) were analyzed under different conditions.The main influencing factors,such as material,rotational speed and spring specific pressure,as well as the influence degree and weight of seal face deformation under seawater environment were analyzed. The results show that the temperature,stress and deformation of seal face increase by 35%,43% and 49% respectively when the rotational speed increases by 100%.The spring specific pressure increases by 100%,which increases the temperature,stress and deformation of the seal face by 17%,5% and 14% respectively. Their maximum values should be limited to prevent seal failure.The thermal expansion coefficient and thermal conductivity of the material have the greatest influence on the seal end face.Reasonable selection of the rotating and stationary rings helps reduce end deformation;The optimal material pair(SiC-M106D) suitable for the speed of 400 r/min and specific spring pressure of 0.2 is selected to make ship stern shaft balance reliable and operate over a long time. The model and calculation method herein can provide a reasonable reference for the design of ship stern shaft seal structure.

关 键 词：船舶艉轴 机械密封 端面变形 温度场 

分 类 号：TH117.2[机械工程—机械设计及理论]