摘要
以煤矿水压三用阀中安全阀为研究对象,借助CFD两相流技术对比分析滑阀式安全阀和针阀式安全阀的气穴特性,研究其压力和气穴分布情况,分析安全阀结构尺寸对改善气蚀破坏的影响,并优化滑阀式安全阀流道的夹角,进一步减小气穴现象的发生。结果表明:相对于针阀式安全阀,滑阀式安全阀受到的气蚀破坏较小,当滑阀式安全阀的流道夹角α=45°时,阀腔的气穴强度最低,气穴面积最小,重要阀口处的最大气相体积分数仅为24.5%。优化后的安全阀能够有效抑制气穴的产生,提高安全阀的安全性能和使用寿命。
Take relief valve of mine water hydraulic three-function valve as the research object. Through computational fluid dynamics （CFD） two-phase flow technology, contrast analysis of cavitation characteristics of slide valve type relief valve and needle type relief valve, study the pressure and cavitation distribution, and analysis influence of size of the relief valve structure on improving cavitation damage were carried out. And the slide valve relief valve of flow angle was optimized to further reduce the occurrence of cavitation phenomenon. Results show that： Relative to the needle valve type relief valve, slide valve type rehef valve of cavitation damage is small. When the slide valve type relief valve of flow angle α = 45°, the valve cavity cavitation intensity is minimum, cavitation area is minimum, and the maximum gas phase volume fraction is only 24. 5% in the important valve mouth. After optimization of the relief valve can effectively restrain cavitation, improve safety performance and service life of the relief valve.
出处
《机床与液压》
北大核心
2018年第1期130-133,共4页
Machine Tool & Hydraulics
基金
国家自然科学基金资助项目(51675003
51575002)
安徽省科技计划项目(1301022074)
流体动力与机电系统国家重点实验室开放基金资助项目(GZKF-201205)
关键词
煤矿水压安全阀
气穴
流场仿真
结构优化
Coal mine water hydraulic relief valve
Cavitation
Flow field simulation
Structure optimization
