基于热-结构耦合的船舶艉轴机械密封环材料筛选

艉轴密封装置是船舶推进系统的关键组成部分,其密封性能的优劣直接影响船舶航行的安全性与可靠性。以船舶艉轴机械密封环为研究对象,基于热-结构耦合模型对比分析了赛龙、聚四氟乙烯和碳石墨这3种材料密封环的温度场和结构场差异,并提取动、静环接触面各节点的温度和压力分布。结果表明：3种材料密封环最高温度和接触压力均处于密封环内侧,并由内而外逐渐减小,相同位置处碳石墨密封环的端面温度小于赛龙与聚四氟乙烯密封环,且接触压力较大。综合密封台架试验验证,碳石墨密封环端面温度和摩擦系数较低于另外两种材料密封环,密封性能较好。研究结果对于不同材料配对的船舶艉轴机械密封环材料的筛选具有一定的指导意义。

Study on Material Screening of Ship Shaft Mechanical Sealing Ring Based on Thermal-Structure Coupling

Stern shaft seal is an important part of ship propulsion system, and its sealing performance directly affects the safety and reliability of ship navigation. Based on the thermal-structural coupling model, the temperature field and structure field of the sealing ring of Stern shaft are analyzed and analyzed, and the difference of the temperature field and structure field of the seal ring is analyzed based on the thermal-structure coupling model, and the difference between the temperature field and the structure field of the seal ring is extracted. And the distribution of temperature and pressure at each node of the contact surface of dynamic and static ring is compared. The results show that the maximum temperature and contact pressure of the sealing ring of three kinds of materials are all in the inner side of the seal ring, and gradually decrease from inside to outside. The end surface temperature of the carbon graphite seal ring is lower than that of Thordon and PTFE seal ring at the same position, and the contact pressure is high. The experimental results show that the temperature and friction coefficient of the carbon graphite seal ring are lower than those of the other two materials, and the sealing performance is better. The results are helpful to the screening of marine stern shaft mechanical seal ring materials with different materials.