Analysis Of The Dynamic Characteristics In Cutting Lift Hydraulic Circuit Of Roadheader

Roadheader is a device used in tunneling, tunneling machine for EBZ318Hbalance relief group seal damage caused by frequent cutting unit problem can not beself-locking, the paper EBZ318H roadheader cutting hydraulic system dynamic lifthydraulic circuit characteristics were analyzed and studied.This paper analyzes the load-sensing system works, constitute environmentalconditions and hydraulic systems EBZ318H roadheader each loop, to study its keycomponents A11VO260LRDS variable pump, M4multi-valve structure and workingprinciple, and then established based on AMESim A11VO260LRDS variable pump,M4multi-valve, balance valve sub-model, build cutting lift hydraulic circuitsimulation model and carry out cutting operations simulation, analysis of itsdynamic characteristics, different conditions have been cutting lifting loop dynamiccharacteristic curve, the simulation results show that the process of landing the jobof cutting the instantaneous pressure tanks impact peak too high, relief groups arebalanced seal the root cause frequent damage.In order to verify the correctness of the simulation model, the establishment ofexperimental environment, the use of experimental operation tunneling machinecutting jobs, while test-related parameters, the actual cutting process characteristiccurve, and analyze the results, analysis and simulation results obtained is consistent.According to the comparison of simulation and experiment is proposed toincrease the cylinder bore, the lower the equilibrium pressure relief valve opens andfeedback from the pipeline to increase the orifice, such as several optimizationprograms to control hydraulic shock, relief groups to solve the balancefundamentally damage the seal problems for further study or improve the hydrauliccircuit to provide a reference to the theoretical model...