The Design And Research Of The Digital Hydraulic High-Speed On-Off Valve

Hydraulic high-speed switching valve as a new technology in digital electric hydrauliccontrol, because of its simple structure, low cost, reliable work, long service life, easy torepair, etc. characteristics, is applied more and more widely in the hydraulic field. High speedon-off valve is the coupling among the machine, electricity, liquid and magnetism, whicheach part interacts with the others during the work and lead to the mutual restriction amongthe response speed, flow and working pressure of the digital valve. Because of the digitalvalve’s hard to meet the performance requirements like fast response of speed, high workingpressure and large rated flow at the same time presently, therefore, how to achieve high speedswitching digital valve’s high frequency response and large capabilities has been focused onin the paper.The main contents of this dissertation have been summarized as follows:(1) havingmade a review of the development background of high speed switched digital valve and itsdevelopment at home and abroad, and proposed a new type of high performance high speedon-off valve on that basis.(2) having introduced the specific working principle of the PWMhigh speed on-off digital valve, established the mathematical model according to its spoolmovement, with detailed analysis at the same time. According to the given design index, highspeed on-off digital valve has been finished successfully.(3) the numerical analysis of thedigital valve electromagnet have been finished by using the Ansoft simulation software, andalso achieved the force vector graph and magnetic field distribution picture. By using theFluent flow simulation sofeware, the numerical analysis of the digital valve armature flowhave been finished, achieved the flow streamlines graph and velocity vector diagram duringthe progress of the armature pickup.(4) in the end of the paper, AMESim simulation analysissoftware have been applied to the dynamic simulation of the high speed on-off valve, whichverified the accuracy of this design. At the same time, having analyzed the dynamic responsecharacteristics of the different accounts for the dynamic high speed on-off valve air ratio, topave a way of the subsequent development and in-depth research.