干气密封推环用弹簧蓄能密封圈工作特性研究

干气密封推环用密封圈关系到补偿环的浮动性和追随性. 通过建立弹簧蓄能密封圈的二维轴对称等效模型，对有、无凸台两种结构的弹簧蓄能密封圈，模拟了不同工况下的密封特性及摩擦特性. 研究表明：两种结构弹簧蓄能密封圈的峰值接触压力随介质压力、预压缩率的增加而增大，都具有良好的自紧密封特性. 推环微动时密封圈的摩擦力较大，不能忽略. 推环轴向微动时，有凸台结构与无台结构的弹簧蓄能密封圈表现出不同摩擦行为；无台弹簧蓄能密封圈，在推环沿±Z方向微动时，摩擦特性曲线相似. 而有凸台的弹簧蓄能密封圈，当推环沿Z方向微动时，分离距离更大；推环沿-Z方向微动时，具有更小的最大静摩擦力，且滑动摩擦力与最大静摩擦力差值较小，滑动平稳，有利于补偿环恢复到设计工作位置.The sealing ring for the thrust collar of dry gas seals is critical to the floating and following performance of the compensation ring. By establishing a 2D axisymmetric equivalent model of the spring-energized seal, the sealing and friction performances of spring-energized seals with and without bosses under various operating conditions were simulated. The results show that the peak contact pressure of both types of spring-energized seals increases with the rise of medium pressure and pre-compression rate, and both exhibit excellent self-energizing sealing performance. The friction force of the sealing ring is relatively large and cannot be neglected when the thrust collar undergoes micro-motion. When the thrust collar undergoes axial micro-motion, the spring-energized seals with and without bosses exhibit distinct friction behaviors; for the spring-energized seals without bosses, their friction characteristic curves are similar when the thrust collar moves along ±Z direction. For the spring-energized seals with bosses, when the thrust collar moves along Z direction, the separation distance is larger; when the thrust collar moves along -Z direction, they have a smaller maximum static friction force, with a smaller difference between sliding friction force and maximum static friction force, leading to stable sliding that is conducive to the compensation ring returning to its designed working position.

搜集汇总

背景与挑战

背景概述

该数据集研究干气密封推环中弹簧蓄能密封圈的工作特性，通过建立二维轴对称模型模拟有、无凸台两种结构在不同工况下的密封和摩擦行为。结果表明，两种结构均具有良好自紧密封特性，峰值接触压力随介质压力和预压缩率增加而增大，但推环微动时摩擦力显著且不可忽略；有凸台结构在推环微动时表现出更优的摩擦性能，有利于补偿环恢复设计位置。