非接触密封流体膜的数值模拟研究  

Numerical Simulation Research of Non-contact Sealing Fluid Film

作　　者：王金刚[1] 赵文凯 WANG Jin-gang;ZHAO Wen-kai(School of Mechanical Engineering, Xi'an Shiyou University, Xi'an, Shaanxi 710065)

机构地区：[1]西安石油大学机械工程学院,陕西西安710065

出　　处：《液压与气动》2020年第5期119-125,共7页Chinese Hydraulics & Pneumatics

基　　金：西安石油大学研究生创新与实践能力培养计划(YCS19213109)。

摘　　要：泄漏量是影响机泵密封性能的主要因素。采用干气密封中的螺旋槽为非接触密封研究对象,通过数值模拟的方法探究了压力、转速对机泵密封性能的影响。结果表明:螺旋槽的中心处受压最大,槽体根部速度最大,此时泄漏量增大密封性能降低。为此对结构的几何参数进行数值优化模拟,最终得到以下优化结构设计参数:当槽数在10~18,螺旋角小于30°,台宽比在0.4~0.5,槽深不超过8μm,坝长比在0.1~0.4之间,可以使干气密封达到良好的密封效果。The amount of leakage is a major factor affecting pump sealing performance.The spiral groove in dry gas seal was used as the non-contact seal research object.The influence of pressure and rotation speed on the sealing performance of the pump is explored by numerical simulation.The results show that the center of the spiral groove is the most stressed,the root speed of the tank the maximum,at this time,the leakage amount increases and the sealing performance degradation.Therefore to simulate the structural geometric parameters of the numerical optimization,finally get the following optimization of structural design parameters:when the number of slots is 10~18,the spiral angle is less than 30°,the platform width ratio is 0.4~0.5,and the groove depth is no more than 8 microns,long dam ratio is between 0.1~0.4,which makes the dry gas seal achieve a good sealing effect.

关 键 词：泄漏量 干气密封 数值模拟 螺旋槽 优化结构 

分 类 号：TH137[机械工程—机械制造及自动化] TB42[一般工业技术]