高速无杆气缸作动器密封圈润滑性能分析

发布时间：2018-04-10 23:00

本文选题：高速无杆气缸 + 直线滑动密封　；参考：《浙江大学学报(工学版)》2017年08期

【摘要】：针对高速无杆气缸作动器密封圈润滑状态随滑动速度变化的特点,提出直线滑动密封“临界速度”概念,分析作动器密封圈润滑性能.建立密封圈润滑状态二维高效分析模型,在全速范围内,对“临界速度”进行初步定位,并揭示预压缩量、唇角和温度对润滑性能的影响机理.考虑摩擦生热和热流分配原则,获得接触域油膜温度边界;结合Gauss分布函数和点云法,构建油膜三维微观计算域;建立密封圈润滑状态三维精确分析模型,对“临界速度”进行精确定位,揭示纹理特征对润滑性能的影响机理.研究结果表明:预压缩量越大、唇角越大、润滑油温度越高,临界速度越高;密封圈三维微观形貌对临界速度的影响明显,相同条件下具有各向同性的微观表面更容易形成完全润滑.
[Abstract]:In view of the characteristics that the lubrication state of the actuator seal changes with the sliding speed, the concept of "critical velocity" of the linear sliding seal is put forward, and the lubricating performance of the actuator seal is analyzed.A two dimensional high efficient analysis model of the lubrication state of the sealing ring was established. The critical velocity was preliminarily located in the full speed range, and the influence mechanism of the precompression volume, lip angle and temperature on the lubrication performance was revealed.Considering the principle of friction heat generation and heat flux distribution, the oil film temperature boundary in contact region is obtained; the three-dimensional microscopic calculation domain of oil film is constructed by combining Gauss distribution function and point cloud method; the three-dimensional accurate analysis model of lubrication state of sealing ring is established.The "critical velocity" is accurately located to reveal the mechanism of the influence of texture features on lubrication performance.The results show that the larger the precompression volume, the greater the lip angle, the higher the temperature of lubricating oil, the higher the critical velocity, and the more the influence of 3D micromorphology of sealing ring on the critical velocity, the higher the temperature of lubricating oil is and the higher the critical velocity is.It is easier to form complete lubrication on the microcosmic surface with isotropy under the same conditions.
【作者单位】：南京理工大学机械工程学院;
【分类号】：TH138

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