2019, 39(2):171-180. doi: 10.16078/j.tribology.2018091

考虑空化效应的螺旋槽机械密封液膜动力学特性研究

浙江工业大学 机械工程学院,浙江 杭州 310032

通讯作者: 孟祥铠, mengxk@zjut.edu.cn

收稿日期: 2018-07-21
录用日期: 2018-10-12
网络出版日期: 2019-03-28

Fluid Film Dynamic Characteristics of Spiral-Grooved Mechanical Seals with Cavitation Effect

Mechanical Engineering College, Zhejiang University of Technology, Zhejiang Hangzhou 310032, China

Corresponding author: Xiangkai MENG, mengxk@zjut.edu.cn

Received Date: 21 Jul 2018
Accepted Date: 12 Oct 2018
Available Online: 28 Mar 2019

引用本文: 孟祥铠, 江莹莹, 赵文静, 江锦波, 彭旭东. 考虑空化效应的螺旋槽机械密封液膜动力学特性研究[J]. 摩擦学学报. doi: 10.16078/j.tribology.2018091.

Citation: Xiangkai MENG, Yingying JIANG, Wenjing ZHAO, Jinbo JIANG and Xudong PENG. Fluid Film Dynamic Characteristics of Spiral-Grooved Mechanical Seals with Cavitation Effect[J]. TRIBOLOGY.

考虑液膜空化效应的影响,研究螺旋槽液体润滑机械密封的动力学特性. 基于液体润滑理论和小扰动法,建立了考虑液膜空化的密封微扰膜压控制方程,采用有限单元法对端面液膜三自由度微扰下的液膜刚度和阻尼系数进行了数值求解,分析了不同参数对液膜密封动力系数的影响. 螺旋槽深度在10 μm左右、槽坝比在0.75左右、槽宽比在0.4左右,螺旋角在9°左右时液膜具有最大的轴向和角向刚度系数. 螺旋槽深度在5 μm左右、槽宽比在0.6左右、螺旋角在20°左右时,两角向交叉阻尼绝对值最大. 初始偏角的存在使密封压力呈现非对称性,从而使两角向动力系数绝对值不再相等. 液膜轴向刚度kzz在数量级上远大于其余液膜刚度值,液膜轴向阻尼dzz、角向阻尼dααdββ远大于液膜其余阻尼值且随着转速和间隙的增大而减小.

关键词: 空化, 螺旋槽, 小扰动法, 有限单元法, 动力系数
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    考虑空化效应的螺旋槽机械密封液膜动力学特性研究

    孟祥铠, 江莹莹, 赵文静, 江锦波, 彭旭东