Research On Key Technology Of Bionic Anti-Erosion Throttle Valve Plug

With the exhaustion of energy and environmental awareness,people are increasingly aware of the importance of sustainable development.The water hydraulic technology is in line with people’s expectations and is progressing on the road that is expected to replace traditional hydraulic technology.However,due to the wide range of water hydraulic media,it is inevitable that there will be various impurity particles,which will cause erosion wear on the water hydraulic valve,which seriously affects the stability and safety of the hydraulic system.Therefore,this paper studies and analyzes the erosion wear phenomenon in water hydraulic technology,and improves the valve plug structure from three aspects:energy absorption,erosion resistant material and bionic surface structure.Analysis of valve plug erosion wear by simulation analysis and experimental methods.Firstly,in order to solve the problem of water hydraulic throttle valve being susceptible to erosion,a bionic anti-erosion valve plug structure with energy absorption,erosion resistant material and surface bionic structure was proposed.According to the research on the erosion resistance of desert scorpion,a rigid-flexible coupling structure with energy absorption was designed and simulated.LS-dyna display dynamics software was used to simulate and analyze the equivalent stress,plastic strain and energy absorption at the sealing surface.Secondly,by using Materials Studio software to analyze Al2O3 and WC ceramic coatings.First,establish a unit cell model for minimum energy optimization.Next,the CASTEP module was used to perform quantum mechanical analysis on the two material cells to compare the stability of the internal bonding of the two materials.Then,using molecular dynamics simulation method,the different interface binding energies of Al2O3 and WC materials were compared and analyzed,and the fracture resistance between the two materials was compared.Finally,the toughening mechanism of the second phase additive Co on the WC coating material was analyzed by molecular dynamics simulation.Thirdly,based on Fluent,the erosion wear condition of the valve plug surface was simulated and analyzed,and according to the coupling bionic principle,the erosion resistance of the valve plug surface was improved.Firstly,The flow field in the valve basin was analyzed.Then,the similarity analysis of the erosion-resistant organisms is carried out by using the bionic theory,and the engineering model was established.The numerical analysis was carried out to obtain the gradient structure and the sealing surface groove structure can improve the valve plug sealing surface and the determination of the optimal solution.Finally,the Isight optimization platform was used to optimize the calculation of the bionic surface structure.The contribution of each variable to the objective function was analyzed using the DOE experiment.The adaptive simulated annealing algorithm was used to optimize the calculation to obtain the optimal model.Finally,a hydraulic erosion test system was set up to conduct erosion experiments on valve plug with different structures.By using spray painting,weighing high-speed camera and electron microscopic observation,different experimental objects were analyzed to verify the effectiveness of different structures’ erosion resistance,and finally the best performance bionic anti-erosion valve plug was obtained.