Numerical Simulation And Visualization Study Of The Electrohydraulic Proportional Cartridge Valve

With the rapid development of the national economy, the industry of steel, electric, energy, petrochemical and vessel has a rapid rise, heavy equipments are highly demanded more and more. Electro-hydraulic proportional cartridge valve is the basic key hydraulic elements in the large hydraulic systems, the function of the electro-hydraulic proportional cartridge valve directly determines the function of the hydraulic system. The domestic electro-hydraulic proportional cartridge valve is mainly dependent on imports and in order to develop domestic electro-hydraulic proportional cartridge valve with our independent intellectual property rights,the theis starts from the key components of the spool and sleeve and studies the different structure of the spool and sleeve by using simulation and experimental methods,which lays a theoretical foundation for the electro-hydraulic proportional cartridge valve localization.This dissertation calculates the flow areas of different cartridge valve orifices by the method of theoretic calculation, then calculates theoreical flows of different cartridge valves, which lays a theoretical foundation for the structural optimization of cartridge valves.The physical model of the cartridge valve of80drift diameter is established, the flow field models is meshed with Gambit, the flow field of the cartridge valve is simulated numerically to get the whole fluid flow area of the flow field.The flow fields of the cartridge valves of different spool orifices are obtained through the numerical simulation, and we make a research about the flow curves, the pressure and velocity distribution and the force of the spools and sleeves in different structures. The influence of the flow characteristics from different spool orifice forms is revealed and the advantages and disadvantages of the different structure of the spool and sleeve cartridge valve flow field is clarified. At last, the structural model through similarity theory analysis is obtained based on similarity principle, the similar visualization experiment on the structural model is done and the correctness of the simulation results is verified, which provides technical support for the optimization, research and development of the cartridge valve.