干气密封气膜流变特性对摩擦特性影响研究  

Study on the Influence of Rheological Characteristic of Dry Gas Seal Film on Friction Characteristic

作　　者：王玥[1] 邹龙庆[1] 李伟[1] 付海龙[1,2] 刘佳琪 WANG Yue;ZOU Longqing;LI Wei;FU Hailong;LIU Jiaqi(School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Bohai Rim Energy Research Institute,Northeast Petroleum University,Qinhuangdao Hebei 066004,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]东北石油大学环渤海能源研究院,河北秦皇岛066004

出　　处：《机床与液压》2023年第16期178-183,共6页Machine Tool & Hydraulics

基　　金：黑龙江省自然基金项目(LH2022E31);大庆市科技发展指导性计划项目(zd-2021-47)。

摘　　要：干气密封是高速轴重要的密封形式,通过螺旋槽密封设计改变其接触间隙流变特性是改善其摩擦磨损的重要手段。在传统研究中,密封接触面开槽区的间隙导致的气膜分布不均极易被忽略,从而使流变特性分析产生误差,给摩擦特性研究带来影响。在平板模型的基础上,考虑气膜分布不均匀性,提出平均间隙模型用于描述干气密封开槽区气体流变特性,实现接触界面摩擦力矩计算,使数值计算误差减小。通过对气膜流变特性数值模拟,确定了关键参数黏度与流变特性的关系,获得了转速等工况参数和螺旋槽结构参数对气膜摩擦特性的影响规律。Dry gas seal is an important sealing form of high-speed shaft,and changing its contact gap rheological characteristics through the spiral groove seal design is an important means to improve its friction wear.In traditional research,the uneven distribution of the gas film caused by the gap in the grooving area of the sealing contact surface is easily ignored,which causes errors in the analysis of rheological properties and affects the study of tribological characteristics.Based on the flat plate model,considering the unevenness of gas film distribution,an average gap model was proposed to describe the gas rheological characteristics of the dry gas seal grooving area,and to realize the calculation of friction torque at the contact interface,so that the numerical calculation error could be reduced.Through the numerical simulation of the gas film rheological characteristics,the relationship between the viscosity of the key parameters and the rheological characteristics was determined,and the influence of working parameters such as speed and spiral groove structural parameters on the friction characteristics of the gas film was obtained.

关 键 词：螺旋槽 干气密封 黏度 流变特性 摩擦特性 

分 类 号：TH117[机械工程—机械设计及理论]