开启式艉轴唇形密封结构参数多目标优化及性能分析  

Multi-objective optimization and performance analysis of structural parameters of open stern shaft lip seal

作　　者：弓志超 李双喜[1] 李方俊[1] 黄泽盛 肖可应 GONG Zhichao;LI Shuangxi;LI Fangjun;HUANG Zesheng;XIAO Keying(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,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：《化工学报》2024年第12期4689-4701,共13页CIESC Journal

摘　　要：开启式船舶艉轴密封因其优异的开启性能使得艉轴密封实现了长寿命高效运转,但因唇体结构设计不合理导致唇口磨损严重。以开启式艉轴唇形密封圈为研究对象,建立唇形密封数值分析模型,分析开启式艉轴唇形密封的密封性能,采用响应面法对唇体结构进行多目标优化分析,进行唇形密封试验。研究结果表明:唇口过盈量对唇形密封开启性能和寿命影响最大,其次是弹簧径向力、前唇角和后唇角;在多种力载荷作用下,反吹气体压力至少大于工作压力的1.3倍时,唇口开启。对开启式艉轴唇形密封合理设计唇口结构参数,通过实现动态调节反吹气体压力,可有效减少唇口磨损并极大改善密封性能,并降低唇口开启对转速的依赖。优化参数组合为:唇口过盈量1.5mm、弹簧径向力70N、前唇角45°、后唇角40°,通过合理地优化结构设计,综合唇口减磨性能提升明显,且唇口寿命提升173%。The open-type stern shaft seal achieves long service life and efficient operation due to its excellent opening performance,but it is very easy to cause serious lip wear due to unreasonable lip structure.Taking the open stern shaft lip seal as the research object,a lip seal numerical analysis model is established to analyse the sealing performance of the open stern shaft lip seal,and multi-objective optimization analysis of lip structure using response surface methodology for lip sealing experiments.The results of the study show that the lip excess has the greatest impact on lip seal opening performance and life,followed by spring radial force,anterior labial angle and labial angle,and the lip opens when the blowback gas pressure is at least 1.3 times greater than the working pressure under multiple force loads.Lip opening performance and lip life are affected by rotational speed,and lip opening performance is positively correlated with lip life.For the open stern shaft lip seal,the lip structure parameters are reasonably designed.By dynamically adjusting the back-blowing gas pressure,the lip wear can be effectively reduced and the sealing performance can be greatly improved,and the dependence of the lip opening on the rotation speed can be reduced.The optimized parameter combinations are:lip overfill 1.5 mm,spring radial force 70 N,anterior labial angle 45°,labial angle 40°,and through the reasonable optimization of structural design,the comprehensive lip wear reduction performance is significantly improved,and the lip life is increased by 173%.

关 键 词：开启式艉轴唇形密封 数值分析 响应面法 优化设计 唇口寿命 反吹气体 试验验证 

分 类 号：TH117[机械工程—机械设计及理论]