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Visual analysis and optimization of erosion and wear of outflow spool valve
Published:2022-06-16 author:WU Shu-hao, ZHANG Xiao-jun, LIANG Yi-wei, et al. Browse: 665 Check PDF documents
Visual analysis and optimization of erosion and wear of outflow spool valve


WU Shu-hao, ZHANG Xiao-jun, LIANG Yi-wei, SONG Zi-long

(School of Mechanical and Transportation Engineering, Taiyuan 
University of Technology, Taiyuan 030024, China)


Abstract:  When the internal flow hydraulic slide valve works, its valve port is easy to be eroded by contaminated particles and wear. In order to solve the problem, the structure of the spool when chamfering was analyzed, and the improvement of the erosion wear of the sharp edge of the spool was studied. Firstly, the twodimensional model of slide valve was drawn, and Edwards model was used to analyze the erosion. Then, the Fluent software was used to simulate and compare the erosion and wear of the sharp edge of the valve port when the valve opened from 0.1mm to 0.6mm, the flow rate was of 10 L/min to 40 L/min, the spool cone angle were respectively 45°, 60°, 75°, and the spool structure was conventional(spool cone angle was 90°). Finally, the erosion and wear results obtained by the simulation were explained and analyzed from two aspects: the angle of the hydraulic oil jet at the valve port and the liquid flow velocity. The research indicates that the maximum erosion wear of the outflow slide valve occurs at the valve port, and the sharp edge of the valve core wears the most serious. When the spool cone angle is 45°, the maximum erosion and wear rate of the sharp edge of the spool is about 10% higher than that of the sharp edge of the conventional spool. When the spool cone angle is set to 60° and 75°, the maximum erosion and wear rate of the spool sharp edge is reduced about 22%, and when the spool cone angle is 60°, the erosion and wear rate of the sharp edge of the spool is reduced most obviously, and the maximum reduction is 55%. The research provides a theoretical basis for improving the antipollution ability of hydraulic slide valves.

Key words: internal flow spool valve; erosion and wear; Edwards model; spool sharp edge; spool cone angle

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