Research On Motion Characteristics Of Hydraulic Vibrator Of Rotary Valve Based On Power Bond Graph

The hydraulic vibration is a technique to transform the DC fluid into the alternating current,and the pressure energy can be converted into the vibration energy of the piston movement.The hydraulic vibration has the advantages of high power density,large rigidity,convenient control and so on.It has become a frontier technology which has attracted much attention in the field of vibration and utilization engineering in recent years.However,due to the complexity of the matching of structural parameters and working parameters of hydraulic components,and the correlation between the vibration and motion characteristics,the field has rich theoretical connotation and broad application prospects.Based on the hydraulic vibrator as the research background,starts with the optimization of the excitation valve core structure.With the parameters of the rotary valve structure and the process parameters of the hydraulic excitation system are the variables,The mathematical model of the rotary valve type hydraulic excitation system is established by using the bond graph method.The rationality of the design of the valve type hydraulic vibrator is verified by the combination of simulation and experimental research.for the follow-up of rotary valve hydraulic vibrator structure design and parameter matching research provide theoretical guidance,obtain the following results:(1)According to the theory of hydraulic vibrate system dynamics,the main factors that affect the motion characteristics of hydraulic excitation system are analyzed,and a rotary valve hydraulic vibrator is designed.(2)Using the method of power bond graph,the state equation of motion characteristics of rotary valve type hydraulic vibration exciter is established.The correctness of the state equation is verified by MATLAB/Simulink solution and simulation.At the same time,by using the simulation model,the influence trend of process parameters on the motion characteristics of rotary valve type hydraulic vibration exciter is discussed.(3)The experimental research of rotary valve type hydraulic vibration exciter is carried out by setting up the experimental test platform of rotary valve type hydraulic vibration exciter.By comparing the experimental results with the simulation results,it is shown that the theoretical analysis results of this study have good reliability.(4)According to the state equation established by hydraulic vibrate system,a prediction model with hydraulic vibrate process parameters as variable and peak displacement asresponse value is established by using the response surface method in Design-expert.Optimization by model solution,the optimum matching combination of process parameters for the maximun peak displacement is obtained.The above results show that the results of this paper will provide an effective way for the development and application of rotary valve hydraulic vibrate technology,and have good experimental application value,which can provide guidance for the reconstruction of hydraulic vibration exciter structure and the matching of technological parameters.