Structure Optimization of Spool and Flow Channel of Electro-Hydraulic Proportional Directional Valve
As the key component of hydraulic system,electro-hydraulic proportional directional valve plays a key role in the con-trol performance of the syste.Taking a certain type of electro-hydraulic proportional directional valve as the research object,aim-ing at the problems of vortex at the concave corner of the main valve core and uneven radial force on the valve core at the inlet and outlet,the structure optimization method of double beveled edges from top to bottom and arc at the convex shoulder of the valve core and designing the inlet and outlet passage as arc type is proposed.In the research,firstly,the three-dimensional model of the electro-hydraulic proportional directional valve is established,and the internal flow field is extracted,Fluent software is used to simulate and analyze the internal flow field of the electro-hydraulic proportional directional valve with different structures.The re-sults show that when the opening of the main valve core is fixed and the inlet pressure is the same,the minimum pressure at the con-cave corner of the valve core increases obviously and the maximum turbulent kinetic energy decreases obviously with the increase of the angle of the upper inclined side,which effectively inhibits the generation and development of vortex.Through the design of cir-cular flow channel,the radial force on the valve core is reduced under different inlet pressure and different valve opening,which provides a theoretical basis for the structure optimization of electro-hydraulic proportional directional valve.
万方数据
维普
