摘要
非接触式干式气体端面密封(DGS)是一种新型机械密封,在旋转机泵的转轴轴端密封装置中已经得到成功应用。对DGS的研究进展进行了总结,着重介绍了密封性能的理论分析与数值计算方法,端面微槽的优化设计方法,试验研究方法以及考虑端面微尺度效应和滑移流效应基础研究等方面的研究现状。指出在高参数条件下DGS端面的热流固耦合与解耦分析,低速或低压条件下密封的启动与停车性能的准确预测及结构优化是DGS技术未来研究的重点,也是进一步拓广DGS应用领域、提高其工作可靠性的关键。
Non-contacting dry gas face seals （DGS） is a new type of mechanical race seat mat nave neen used for sealing the axial end of a turbo-machinery. The state-of-the-art of DGS technology and its studies were introduced. The methods of theoretical studies and numerical analyses for sealing performance, the principle of spiral groove optimization, the test methods and the basic researches for effects of micro-size and slip flow on sealing performance were presented. In the future,the couple study of thermal and fluid and solid of DGS faces at high operating conditions, the prediction of sealing performance under the conditions of low speed and/or low pressure of sealed medium and the geometrical optimization of spiral grooves are the most important problems to be solved for a wide range of application of DGS.
出处
《润滑与密封》
CAS
CSCD
北大核心
2009年第8期105-110,共6页
Lubrication Engineering
基金
国家自然科学基金资助项目(50575152
50805130)
关键词
气体端面密封
密封性能
微尺度效应
结构优化
gas face seal
sealing performance
micro-size effect
structure optimization
