单密封带滑靴高速应用的制约因素分析  

Analysis of Restricting Factors for High-speed Applications of Single-seal Slippers

作　　者：莫虎[1] 胡燕平[1] MO Hu;HU Yanping(School of Mechanical Engineering,Hunan University of Science and Technology,Xiangtan,Hunan,411201)

机构地区：[1]湖南科技大学机电工程学院,湘潭411201

出　　处：《中国机械工程》2025年第1期96-103,共8页China Mechanical Engineering

基　　金：湖南省自然科学基金(2023JJ60180);湖南省教育厅科学研究项目(24B0973)。

摘　　要：为研究制约单密封带滑靴高速应用的因素,计入密封带磨损轮廓,建立了滑靴副流固热耦合动力学模型,分析了转速及密封带宽度对底面油膜厚度、运行姿态、支承刚度和泄漏的影响。结果表明:高转速下,滑靴离心力矩增大时,倾角增大,底面最小间隙减小;动压效应增强时,吸油侧间隙增大,油膜刚度降低,偏磨风险增大。密封带增宽可提高滑靴底面的支承刚度,但密封带外内径比超过1.6会导致底面油膜增厚、泄漏增加。研究认为,泄漏和偏磨是制约单密封带滑靴高速应用的主要因素;在宽密封带基础上,考虑微结构以限制楔形动压效应,可能是提高滑靴允用转速范围的有效途径。To investigate the factors restricting the high-speed applications of single sealing land slippers,a flow-solid-thermal coupling dynamic model was established,considering the sealing land wear profile.The effects of rotational speed and seal width on oil film thickness,operational posture,bearing stiffness and leakage were analyzed.Results show that at high speed,the increases of centrifugal moment of the slipper lead to a larger tilt angle and a reduced minimum bottom clearances.Simultaneously,the enhanced dynamic pressure effect increases the suction-side clearances,reduces oil film stiffness,and elevates the risk of partial wear.Increasing the width of the sealing lands may improve the supporting stiffness of the slipper,but the outer-to-inner diameter ratio exceeding 1.6 will result in thicker oil films and increased leakage.It is concluded that leakage and partial wear are the main factors restricting the high-speed applications of single sealing land slippers.Introducing microstructures on wide sealing lands to limit wedge-shaped dynamic pressure effects may effectively expand the allowable speed ranges of slippers.

关 键 词：滑靴副 磨损 流固热耦合 动压效应 

分 类 号：TH137[机械工程—机械制造及自动化]