基于相变效应的内压型螺旋槽液膜密封性能分析

发布时间：2018-05-26 03:39

本文选题：相变 + 液膜密封　；参考：《化工学报》2017年09期

【摘要】：液膜相变现象不仅改变了端面润滑状态,而且对密封性能及稳定性有着显著的影响。使用有限体积法对控制方程进行离散,研究了螺旋槽结构参数与密封工况参数对密封性能及液膜相变率的影响。结果表明:开启力与泄漏量随螺旋角、槽数、槽深、压差、转速的增大而增大,随槽面宽比、槽台宽比的增大先增大后减小,分别在槽面宽比ζ=0.5与槽台宽比φ=0.7时取到最大值。相变率随螺旋角、转速的增大而增大,随槽数、槽深、压差、槽台宽比的增大而减小,随槽面宽比的增大先减小后增大,在槽面宽比ζ=0.8时取最小值。通过对各参数合理地选择与组合,可以有效地抑制相变进程,进而在保证密封运行稳定的同时利用相变现象提高密封性能。
[Abstract]:The phase change of liquid film not only changes the lubricating state of the end face, but also has a significant effect on the sealing performance and stability. The finite volume method is used to discretize the governing equation. The effects of the structural parameters of spiral groove and sealing conditions on the sealing performance and the liquid film phase transition rate are studied. The results show that the opening force and leakage amount increase with the increase of spiral angle, slot number, groove depth, pressure difference and rotational speed, and increase first and then decrease with the increase of slot width ratio and slot width ratio. The maximum values are obtained when the groove width ratio 味 0.5 and the slot width ratio 蠁 0. 7 respectively. The rate of phase transformation increases with the increase of spiral angle and rotation speed, and decreases with the increase of slot number, groove depth, pressure difference, and the ratio of groove to platform width, and then increases with the increase of groove width ratio, and the minimum value is taken at the groove width ratio 味 ~ (0.8). By reasonably selecting and combining the parameters, the phase change process can be effectively suppressed, and the seal performance can be improved by using the phase change phenomenon while ensuring the stable operation of the seal.
【作者单位】：中国石油大学(华东)密封技术研究所;
【基金】：国家自然科学基金项目(51375497) 山东省自主创新及成果转化专项(2014ZZCX10102-4)~~
【分类号】：TQ050

【相似文献】