摘要
针对纯水溢流阀阀芯与阀套存在的气蚀、冲蚀问题,设计一种具备高压引流孔与多级串联阀口结构的阀芯。介绍阀芯与阀套关键配合尺寸的设计思路,利用Fluent简要分析了微射流与冲蚀的发生机制,并推导多级串联阀芯的抗气蚀原理;依据改进阀芯的实际结构推导建立纯水溢流阀的数学模型。为验证改进式阀芯的抗气蚀、冲蚀性能,建立两种阀芯的Fluent流体仿真模型,探究高压引流口与多级串联阀口对气蚀、冲蚀现象的影响机制。仿真结果表明:同等压力等级下,新式阀芯的射束流速更低、气蚀现象更轻,有助于纯水溢流阀长期稳定的运行。
Aiming at the cavitation and erosion problems existing in the valve spool and valve sleeve of the water relief valve,the spool structure with high pressure drainage hole and multistage series valve port was designed.The design principle of key matching size of valve spool and valve sleeve was introduced.The mechanism of micro-jet and erosion was analyzed by Fluent,the anti-cavitation principle of multistage series valve spool was deduced.The mathematical model of the water relief valve was established according to the actual structure of the improved spool.In order to verify the anti-cavitation and anti-erosion performances of the improved valve spool,two kinds of valve spool fluid simulation models were established,the influence mechanism of high pressure drainage port and multi-stage series valve port on cavitation and erosion was explored.The simulation results show that:under the same pressure grade,the im-proved spool has lower beam flow rate and lighter cavitation phenomenon,which is conducive to the long-term stable operation of water relief valve.
作者
王涛
李俊士
孔祥凯
WANG Tao;LI Junshi;KONG Xiangkai(Beijing Tianma Intelligent Control Technology Co.,Ltd.,China Coal Technology and Engineerin Group,Beijing 101399,China)
出处
《机床与液压》
北大核心
2023年第23期211-217,共7页
Machine Tool & Hydraulics
基金
天地科技股份有限公司科技创新创业资金专项资助项目(2021-TD-ZD007)。
关键词
纯水溢流阀
抗气蚀
优化设计
多级串联阀口
Water relief valve
Anti-cavitation
Optimization design
Multi-stage series valve port
