双向旋转式非接触机械密封技术研究进展

Research Progress in the Bi-direction Non-contact Mechanical Seal Technology

在一些高参数工况下,传统的接触式机械密封往往会出现磨损严重、寿命较短的现象,难以承担设备长周期运行的重任。开展非接触式机械密封特别是双向旋转式非接触机械密封的研究,有利于这一问题的解决。本文通过对几种典型双向旋转式非接触密封的国内外研究现状综述,以及相关槽型特性的对比分析,获得了不同工况条件下工作的双向旋转式非接触密封端面槽型结构的选择原则:高压、高温、大尺寸场合宜选用圆弧槽,低速场合宜选用树形槽,磨削粒子细小的场合宜选用多孔端面,非高温场合均可考虑选用T型槽。指出完善理论模型、强化回流效应、提高开启稳定性及提升T型槽稳态运行温度区间为双向旋转式非接触机械密封技术的发展方向。

In some high parameter condition, the traditional contact mechanical seal worn badly, life is short, can not take long period run of the equipment requirements. Carry out non-contact mechanical seal especially bi-directional rotary non-contact mechanical seal research in favor of solving the problem. It was summarized of several typical bi-direetional rotary non-contact seal reviews domestic and overseas. Using comparative analysis method, comparing related groove profile characteristics of each groove, It was gived that different operating conditions of the bi-directional rotary non-contact seal choosing principle：high pressure and high temperature, large size occasions appropriate chooses circular groove ;Low speed occasions appropriate chooses tree groove; Grinding particles of tiny occasions appropriate chooses multi-pore face; High temperature occasion all can choose T-shape groove. Points out that consummating theory model and strengthening the backflow effect, improving the open stability and enhancing T groove steady-state operation temperature range are the development direction of hi-directional rotary non-contact seal technology.