Design And Research On Hybrid Power-train System Of Roadheader Cutting Portion

Roadheader is a kind of important equipment which is used in bridge, tunnel and mine roadway mechanizing tunnel. With the increasing depth of coal mining, the uncertainty conditions of coal and rock are increased, which results in the break of heavy load increased, the gas explosion increased, rock collapse increased and the occurrence rate of roadheader increased. An automatic excavation equipment adapted to the deep and dangerous coal seam is urgently needed.In this paper the solution is proposed according to the problem of heavy roadheader which is one of the EBZ series products produced by China Coal Research Institution. The correct and the dynamic characteristics of the plan is verified through the simulation analysis. The detailed contents are as follows:The kind of the roadheader is classified. The present situation, research, development and achievements on roadheader are expounded both at home and abroad by reading literatures on roadheader. The current problems or deficiencies of roadheader are analyzed. The research direction of this topic is determined. The background and significance of this research are illustrated.According to the existing problems, puts forward the hybrid drive system coupled by assisted hydraulic motor and the original cut motor. The power of assisted hydraulic motor is from the hydraulic system of roadheader driving system. It can effectively reduce the power of original cutting motor and improve the carrying capacity of transmission system under the same cutting power demand. The storage of the system can reduce the impact of the hydraulic system and recycle the hydrauli system energy reasonablily,which improves the stability of the hydraulic system. The parameters of the key components of hybrid power transmission system cutting department are matched. The hybrid power transmission system of roadheader is simplified. The dynamic equations of the system are established according to different working conditions.The impact of the different working parameters on roadheader cutting ability, productivity, efficiency of cutting, rock and cutting head load performance are analyzed, which provides a theoretical basis for the subsequent co-simulation. Analyzes the cutting head cutting principle, proposes the process of load simulation, establishes the mathematical model of cutting head load, and simulates the cutting head load by MATLAB/simulink; analyzes the working principle of the rotary mechanism and the lifting mechanism, both of them are simulated.A reasonable assumption is proposed on the hydraulic system of cutting part hybrid transmission scheme. Both the mathematical models and simulation models of hydraulic pump, hydraulic motor and storage are built. Both the mathematical models and simulation models of cutting motor, torque coupling of gear, planetary gear reducer and other mechanical systems are built.The AMESim simulation model of the cutting parthybrid powertrain system is established. The cutting hybrid transmission system is simulated and analyzed. The results show that the hydraulic motor can assist the cut motor effectively. The energy storage device can reduce the hydraulic system shock under the heavy mutation conditions significantly. Through the analysis of different signal adaptive system simulation. The results show that different power hydraulic motor can effectively assist the cutting motor working in the rated operating conditions. The system is proved to have a good self adaptability. The hybrid drive system model with load simulation is established by AMESim and Simulink co-simulation. The results show that the hydraulic motor can assist the cut motor effectively and the energy storage device can reduce the hydraulic system shock obviously.