Study On Driving Pressure And Flow Matching Mechanism Of Heavy Breaker

Hydraulic breaker is a new type of efficient crushing tools,with the help of high pressure oil output from the mother machine to achieve reciprocating movement of the piston in the cylinder block,external work.With the rapid development of China’s urbanization process and infrastructure construction,the demands for hydraulic breaker is increasing,and the requirements for performance are becoming higher and higher.At present,there is still a certain gap between China’s hydraulic breaker and foreign countries in terms of impact performance,energy utilization rate and service life.Therefore,it is urgent to develop a hydraulic breaker with stable work and excellent impact performance.This paper takes a 205 mm gas-liquid combined breaker as the research object,carries out co-simulation analysis and experimental research,and analyzes the influence of working parameters and structural parameters on the motion characteristics.The specific research contents are as follows:（1）According to the structure and working principle of hydraulic breaker,the movement characteristics of gas-liquid combined breaker and to study the flow characteristics,analyzed the piston and the valve core motion and force,the piston and the dynamic balance equation of the valve core and flow balance equation,contains the viscous friction resistance,hydraulic clamping force and leakage flow mathematical model.（2）According to the structure and working characteristics of gas-liquid combined breaker,the dynamic model and hydraulic model are built in ADAMS and AMEsim respectively.The interface module between the two software is used to establish the joint simulation model of gas-liquid combined breaker.The variation rules of motion and flow characteristics under different initial pressure of nitrogen chamber,different input flow rate,different cover amount of oil return hole and different position of signal hole are obtained.（3）To design and set up a joint type gas-liquid breaker experiment platform,with a205 mm gas-liquid combined breaker as experimental object,the experiment equipment,data collect,etc,under different working parameters,structure parameters of the pressure data acquisition,got into the tubing,return pipe and valve of the high and low pressure chamber pressure curve.（4）Through the theory analysis and simulation analysis,combined with experimental research,summarizes the gas-liquid joint under different working parameters,structure parameters of the motion law of the breaker in the moving parts and internal change law of pressure vessel,received the blow type breaker to get the best performance of the optimal structure parameters,and proves the rationality of the simulation model combined with accuracy.（5）The research work in this paper provides a virtual prototype model with high simulation accuracy and an experimental testing platform for the serialization research and development of gas-liquid combined breaker.With the continuous improvement of the simulation model,this method will play a greater role in structural optimization and product design.