Analysis and Research on the Opening and Closing Time of Solenoid Valves under Different Matching Forms of Main Valve Cores
In order to explore the working performance of the main valve core of the pilot operated high-pressure sole-noid valve with different sealing structures,the stress analysis of the main valve core of a pilot operated high-pressure sole-noid valve was carried out.Three kinds of sealing structures of the main valve core sealing ring were proposed,and the sin-gle machine performance tests at room temperature,low temperature and multiple actions were carried out.The effects of different sealing structures on the motion characteristics of the main valve core and the opening and closing time of the so-lenoid valve were analyzed.lt is found that the opening time of the O-ring-retaining ring sealing structure is less than that of the double expansion ring and double retaining ring sealing structures at room temperature,and the closing time is longer than that of the double expansion ring and double retaining ring sealing structures.The opening and closing time of the O-ring-retaining ring sealing structure at low temperature is significantly increased compared to at room temperature,while the double retaining ring and double expansion ring sealing structures have relatively little change in the opening and clos-ing time.A systematic air release test was conducted on the solenoid valves of three sealing structures,the opening and clos-ing time of the solenoid valves was obtained during the air release process.The experimental result shows that the solenoid valves of three sealing structures can meet the opening and closing time t ≤ 150 ms.The open of the solenoid valves of O-ring-retaining ring structures on the main and auxiliary circuits is the fastest and the close is slow.
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