密封环挠性安装形式对干气密封动态追随性的影响

DOI: 10.16078/j.tribology.2017.02.001

密封环挠性安装形式对干气密封动态

追随性的影响

陈 源1

, 彭旭东1,2*

, 江锦波1

, 孟祥铠1,2

, 李纪云

1,2

(1. 浙江工业大学 机械工程学院, 浙江 杭州 310032;

2. 浙江工业大学 过程装备及其再制造教育部工程研究中心, 浙江 杭州 310032)

摘 要: 基于气体润滑理论, 并通过小扰动法建立了螺旋槽干气密封微扰膜压控制方程, 在高速高压条件下获得了气膜动态特性系数; 基于动力学相关知识, 在考虑转轴轴向振动的情况下, 利用气膜轴向动态刚度和阻尼系数分别求解了静环挠性安装、动环挠性安装和两环均挠性安装的干气密封挠性环运动方程. 在不同轴向激励振幅、激励频率、挠性环质量、弹簧刚度和辅助密封圈阻尼下分别研究了三种典型结构干气密封动态追随性并进行了对比分析.结果表明：当轴向激励频率较高或挠性环质量较大时, 静环挠性安装干气密封在刚受到外界激励时膜厚突变相对严重, 动态追随性较差; 在轴向激励频率较低且挠性环质量较小时, 静环挠性安装干气密封相比动环挠性安装干气密封表现出更好的动态追随性; 在三种密封环挠性安装形式中, 两环均挠性安装干气密封动态追随性最好, 且具有绝对优势.

关键词: 高速高压; 干气密封; 密封环挠性安装形式; 动态特性中图分类号: TB42

文献标志码: A

文章编号: 1004-0595(2017)02–0139–09

The Influence of Flexibly Mounted Ways of Seal Rings on

Dynamic Tracking of Dry Gas Seal

CHEN Yuan 1

, PENG Xudong 1,2*

, JIANG Jinbo 1

, MENG Xiangkai 1,2

, LI Jiyun

1,2

(1. College of Mechanical Engineering, Zhejiang University of Technology, Zhejiang Hangzhou 310032, China 2. The MOE Engineering Research Center of Process Equipment and Its Remanufacture, Zhejiang University of

Technology, Zhejiang Hangzhou 310032, China )Abstract : The perturbation film pressure governing equations of spiral groove dry gas seal are presented by perturbation method based on gas lubrication theories, and the dynamic force coefficients of gas film are got in the condition of high-speed and high-pressure. The motion equations of flexibly mounted rings of the flexibly mounted stator, the flexibly mounted rotor, the flexibly mounted stator and rotor dry gas seals are solved by using the dynamic stiffness and damping of gas film when the axial vibration is taken into consideration. The dynamic tracking property of the three typical configurations is analyzed under the different excitation amplitude, excitation frequency, flexibly mounted ring’s mass,spring stiffness and auxiliary seal damping. The results show that the higher excitation frequency or the larger flexibly

第 37 卷 第 2 期摩 擦 学 学 报

Vol 37 No 22017 年 3 月

Tribology

Mar, 2017

Received 10 October 2016, revised 26 November 2016, accepted 8 December 2016, available online 28 March 2017.*Corresponding author. E-mail: xdpeng@, Tel: +86-138********.

The project was supported by the National Natural Science Foundation of China (51575490)，the National Key Basic Research Program of China (973) (2014CB046404)，the Natural Science Key Foundation of Zhejiang Province, China (LZ15E050002) and the Natural Science Youth Foundation of Zhejiang Province, China (LQ17E050008).

国家基金面上项目(51575490)、国家重点基础研究发展规划项目(973)(2014CB046404)、浙江省自然科学基金重点项目(LZ15E050002)和浙江省自然科学基金青年基金(LQ17E050008)资助.