Study On The Quick Open Valve With Large Flow Rate

In recent years,the hydraulic valve development to big trend of traffic,the structure characteristics of hydraulic valve and release strategy becomes the key to develop large flow hydraulic valve,large flow hydraulic valve adopt what kind of structure can achieve large flow can have fast synchronization released again at the same time,is the key point of this study.This paper is based on the national natural fund project of the high anti fast unloading mechanism.Large flow hydraulic valves have made great progress in terms of traffic,but the impact of high speed occasions,still can not meet the demand of high-speed large flow release,followed by the slow opening valve,lead to the impact of a long time,the impact force can not meet the needs of.For the situation of large flow demand,should consider the use of large flow valve performance.In order to solve the impact pressure simulation experiment in the large flow with high velocity impact of composite load test machine with quick release valve,this paper proposes a new structure of a large flow valve,introduces its structure and work principle.The key size was calculated,and calculate the hydrodynamic force suffered spool,a seal protection process mathematical model was imported into MATLAB/Simulink software for analysis,finally complete optimization design of sealing protective sleeve.The ANSYS Fluent software was used to simulate the flow field in the valve body,and the velocity of the flow field in the valve body was obtained,and the flow velocity and flow rate were plotted.Building the simulation model of the operating system,and the dynamic simulation analysis is carried out on the valve opening process.Finally,the impact test bench was studied,using 12 accumulator working group provides instantaneous flow of power source,the use of SIEMENS PLC and Labview software to realize the electromagnetic valve,motor and energy storage control device group,with real-time acquisition and processing of data using Advantech 1710HG data acquisition board and the pressure and displacement sensor.The experiment includes the no-load operation and the new type of energy absorbing device.The results are in good agreement with the theoretical data,which verifies the feasibility of the proposed structure.The results provide a theoretical reference for the rapid release of large flow synchronous hydraulic valves in china.