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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
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86-571-87041360,87239525
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No.9 Gaoguannong,Daxue Road,Hangzhou,China
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meem_contribute@163.com
Abstract: Aiming at the problem that the response characteristics and flow field characteristics of a combined cartridge valve for hydraulic piling hammer need to be studied in the process of operation, the response characteristics and flow field characteristics of the combined valve were simulated and analyzed. Firstly, the structure of cartridge valve was introduced, and the action mechanism of cartridge valve spool was analyzed. Considering the spring stiffness, spool area, damping hole size, steady-state hydrodynamic force, spool gravity, liquid damping force, hydraulic oil volume elasticity and other factors, the main parameters of the system were determined, and the mathematical theoretical models of cartridge valve opening and closing were established respectively. Then, AMESim software was used to simulate and analyze the pressure of the cartridge valve control chamber, the flow rate of the valve port, and the displacement of the valve core. Finally, the velocity and pressure contours of the cartridge valve under different openings were obtained by Fluent simulation software. The results show that the pressure distribution has no obvious mutation, and the valve core opening design is reasonable. When the combined cartridge valve openings are 20%, 40%, 60%, 80% and 100%, respectively, the average outlet flow rates are 19.64 m/s, 39.20 m/s, 53.22 m/s, 55.44 m/s and 57.28 m/s. In this study, the influence of cartridge valve opening on the maximum flow rate, average flow rate and maximum pressure of the fluid is obtained, which provided a basis for the performance prediction of the special combination valve.
Key words: combined cartridge valve; mathematical model; AMESim simulation model; flow field characteristic simulation analysis; response characteristic; cartridge valve performance