泵用串联式干气密封的优化设计及其性能校核  

Optimization Design and Performance Check of Dry Gas Seal of Tandem Pumps

作　　者：陆俊杰[1] 丁雪兴[1] 张伟政[1] 翟霄[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《甘肃科学学报》2014年第3期82-86,共5页Journal of Gansu Sciences

基　　金：国家自然科学基金(51165020)

摘　　要：通过多目标优化理论构建了螺旋槽气膜开启力与泄漏量之比的协调函数,并利用该目标函数,通过Maple软件,对泵用串联式干气密封进行近似求解,获得螺旋槽的最佳槽形参数,获得气膜厚度2.14μm.应用Solidworks软件建立螺旋槽和气膜模型,并利用Gambit软件对模型划分网格.运用Fluent软件,在给定的工作条件下,对螺旋槽内部微间隙三维气体流场进行数值模拟,得到了速度分布、压力分布和泄漏量等数据,经计算得到最终的气膜厚度2μm,与优化气膜厚度的误差仅为6.5%.从而证明可以利用该方法对此类干气密封装置进行优化设计及性能校核.According to the multi-objective optimization theory, a coordination function of spiral groove gas film opening force and leakage ratio was established,and based on the software Maple and the objective function,the dry seal of a tandem pump was approximated to obtain the optimized groove parameters of the spiral groove and the gas film thickness of 2.14 μm. And the software solidworks was adopted to build a model of the spiral groove and gas film, and the software gambit was utilized to mesh the model. The software fluent was used to simulate the three-dimensional gas flow field inside micro clearance of the spiral groove gas seal under given conditions and obtain the value of the velocity distribution, pressure distribution and leakage. The gas film thickness is 2μm and the error is 6.5%, which confirms the method is workable for the optimization design and performance check of dry seal devices.

关 键 词：干气密封 优化设计 性能校核 数值模拟 

分 类 号：TQ051[化学工程]