槽底倾斜度对螺旋槽干气密封性能的影响

发布时间：2018-05-02 05:58

本文选题：干气密封 + 螺旋槽　；参考：《润滑与密封》2017年11期

【摘要】：提出一种可以计算斜底螺旋槽干气密封性能的近似解析方法。构建槽底倾斜螺旋槽干气密封的气膜厚度表达式,基于螺旋槽的窄槽理论,近似解析求解其气膜压力控制微分方程,获得槽底倾斜螺旋槽干气密封端面气膜压力分布,进而获得端面开启力、气体泄漏率和气膜刚度等密封性能,并将结果与Fluent软件计算结果进行对比,两者的结果吻合。计算结果表明:斜底槽对密封开启力和泄漏率的影响规律取决于初始槽深;与平底槽比较,当初始槽深较小时,斜底槽的开启力较小,但泄漏率也较小;当槽深较大时,斜底槽具有较大的气膜开启力,槽底倾斜程度越大,开启力越大,但同时泄漏率也越大;一般地,斜底槽具有较大的轴向气膜刚度,槽底倾斜程度越大,气膜刚度越大,抗干扰能力越强。
[Abstract]:An approximate analytical method for calculating the performance of helical groove dry gas seal with oblique bottom is presented. Based on the theory of narrow groove, the film pressure distribution on the end surface of tilted spiral groove dry gas seal is obtained by approximate analytical solution of the film pressure control differential equation. The sealing performance such as the face opening force, the gas leakage rate and the film stiffness are obtained, and the results are compared with those calculated by Fluent software. The results are in good agreement with each other. The results show that the influence of slant bottom groove on seal opening force and leakage rate depends on the initial slot depth; when the initial groove depth is small, the opening force of inclined bottom groove is smaller, but the leakage rate is smaller; when the slot depth is larger, the slant bottom groove has a smaller opening force and a smaller leakage rate. The slanting bottom groove has larger film opening force, and the more inclined the groove bottom, the greater the opening force, but at the same time, the greater the leakage rate is, generally speaking, the inclined bottom groove has greater axial film stiffness, and the greater the slanting degree of the groove bottom, the greater the film stiffness. The stronger the anti-interference ability.
【作者单位】：昆明理工大学化学工程学院;
【基金】：国家自然科学基金项目(51465026)
【分类号】：TH136

【相似文献】