Structural Design And System Performance Simulation Of Stepless Amplirude-modulated High Frequency Broken Hammer

In this market where hydraulic broken hammer dominated,high frequency broken hammer(abbr: HFBH)stand out due to his high efficiency,energy saving,environmental protection,safety and other advantages,and become a new favorite mining machinery.However,to the existing high frequency broken hammer,its amplitude can mostly not be adjusted or only have been adjusted slightly,its scope is limited.So this topic is based on the stepless amplitude modulation technology,designs a new type of vibrator which applied in high frequency broken hammer can make the hammer realize stepless frequency modulation(abbr: FM)and amplitude modulation(abbr: AM),can adapt to a variety of conditions and meet the requirements of sustainable development.As SV-60 high frequency broken hammer as the prototype,This topic designs a vibrator which could satisfy the requirement of stepless amplitude adjustment and hydraulic circuits for the FM and AM system of high frequency broken hammer.At the same time,establishing 3D model of HFBH by using CATIA software,then importing it into ADAMS for dynamics model,combining with AMESim software to establish the hydraulic system model.Finally,completing co-simulation model of ADAMS-AMESim.After that,compare the simulation results with the test results,and to explore the influence of floating block position on system performance parameters of high frequency broken hammer.Main work content is as follows:(1)For AM system,changing its original eccentric structure to add a fixed and an floating eccentric block.The changes of amplitude can be realized by adjusting the angle between them.According to its structure,designing hydraulic circuits and calculating the relationships between the flow,amplitude,force and the position of the eccentric block;For FM system,choosing the right means to control frequency,and establishing the mathematical model to analyze system characteristics.(2)As UG as intermediate software,importing the 3D model of high frequency broken hammer from CATIA into ADAMS.Completing its dynamics model by setting the constraint,drive,load and touch.At the same time,choosing the appropriate hydraulic component model number and establishing AMESim model based previous hydraulic circuits.Setting up the date information needed to transfer and exchange from each other,then completing the establishment of co-simulation model through the software interface.(3)Using the related equipment to complete the site test of high frequency broken hammer.By comparing the simulation results and test results to verify the correctness of the model and analyze the cause of difference.Based on the correct model,researching the effect of floating block position on FM system of high frequency broken hammer and the influence of amplitude and drive speed on the system vibration performance parameters of high frequency broken hammer to determine the product suitability.