基于Workbench的瑞利台阶干气密封流固耦合分析  

Analysis on Workbench-based Rayleigh step in dry gas sealing with fluid-structure coupling

作　　者：张伟政[1,2] 任娅南 韩东民 姜娥 ZHANG Weizheng;REN Yanan;HAN Dongmin;JIANG E(School of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China;Pump and Valve Engineering Research Institute,Lanzhou University of Technology,Wenzhou 325100,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]兰州理工大学温州泵阀工程研究院,浙江温州325100

出　　处：《甘肃科学学报》2024年第5期96-103,共8页Journal of Gansu Sciences

摘　　要：为了研究瑞利台阶在干气密封中的性能表现,建立了瑞利台阶干气密封计算模型,采用Workbench流-固耦合分析模块对动、静环在整体气膜作用下的受力与变形进行模拟计算,探究了不同工况参数和密封环材料对动、静环的变形及应力影响规律。结果表明:在槽根处的气膜压力最大,形成的动压效应最强,气膜力也较大,故动、静环的最大应力和形变均位于槽根处。在入口压力和旋转速度增大时,气膜力也会随之增大,从而使动、静环的应力值和形变量增大。动环材料相对于静环材料有更高的弹性模量,所以动环的应力变化相对于静环要更大,而较大应力变化有利于抵消流体力耦合引起的变形应力,进而达到减小密封环变形的目的。In order to study the performance of Rayleigh step in dry gas seal,the calculation model of Rayleigh step dry gas seal was established.The Workbench fluid-structure coupling analysis module was used to simulate and calculate the force and deformation of the dynamic and static ring under the action of the overall air film,and the deformation and stress influence of different working conditions and sealing ring materials on the dynamic and static ring were explored.The results show that the air film pressure at the groove root is the largest,the dynamic pressure effect is the strongest,and the gas film force is also large,so the maximum stress and deformation of the moving-static ring are also located at the groove root.When the inlet pressure and rotational speed increase,the gas film force also increases,so that the stress value and shape variable of the dynamic and static ring increase.The moving ring material has a higher modulus of elasticity than the static ring material,so the stress change of the moving ring is larger than that of the static ring,and the stress change caused by the coupling of resistance is greater,so as to achieve the purpose of reducing the deformation of the sealing ring.

关 键 词：瑞利台阶 干气密封 模拟计算 流固耦合 

分 类 号：TH117.2[机械工程—机械设计及理论]