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Characteristic analysis on throttle valve after secondary structure optimization of double U-groove

Published:2023-04-20 author:ZHOU Zhi-jin, LI Song-bo, LUO Xian-cong. Browse: 548 Check PDF documents

Characteristic analysis on throttle valve after secondary structure

optimization of double U-groove

ZHOU Zhi-jin1,2, LI Song-bo2, LUO Xian-cong2

(1.School of Mechanical Engineering, Guizhou Institute of Technology, Guiyang 550003, China; 2.Mechanical

and Electrical Engineering College, Jiangxi University of Science and Technology, Ganzhou 341000, China)

Abstract: During the working process of the throttle valve, the structure of the throttle groove affects the temperature and deformation of the throttle valve core, which in turn affects the sticking of the valve core. It is of great significance to reduce the maximum temperature and maximum deformation on the valve core by optimizing the structure at the valve core throttle groove. Therefore, the valve groove structure with linear contact was optimized into a valve groove structure with small fillet contact, and the maximum temperature and maximum deformation at the optimized valve groove were studied. Firstly, the structure of the throttle valve was introduced, and the radius of the fillet of the throttle notch structure was optimized. Then, the influences of fillet radius, valve opening, and valve pressure difference on the valve groove temperature and deformation were analyzed. Finally, the influences of the throttle valve notch fillet radius, different valve openings, and differential pressure on the maximum temperature and maximum deformation at the valve core were analyzed. The research results show that when the optimal value of the fillet radius is 2 mm, the maximum temperature and the maximum deformation on the valve core are both at a minimum value; when the valve opening is 4 mm, the throttling groove structure after the secondary optimization has a negative effect on the valve core. The maximum temperature and maximum deformation are significantly reduced; when the valve opening is 6 mm, the maximum temperature and maximum deformation on the valve core also decreased, and as the pressure difference increased, the optimization effect is better. It shows that the optimization of throttle groove spool fillet has a good effect on reducing the maximum temperature and maximum deformation at the corner of the second throttle groove, which provides a design basis for optimizing the throttle groove structure and reducing the maximum temperature and maximum deformation of the spool.

Key words: flow control valve; throttling groove structure; valve core fillet; valve core maximum temperature; valve core maximum deformation; valve opening; valve pressure

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