Co-Simulation Research On Boom-Type Roadheader Mechanical And Hydraulic System

Coal resource is abundant in our country, and the majority of below the surface, as of 2012, 90.7% of the coal mine in our country are from underground mining. Due to the complexity of underground coal seam distribution in our country, as a key equipment for mechanization of fully mechanized cantilever machine, underground cutting work often encounter will be half coal rock or hard, complicated and changeable working load of the hydraulic system pressure cycle impact. In addition, due to the engine driving power, in the process of start and the actuators operating mode shift, may inevitably make the hydraulic system pressure shock and speed fluctuation, the corresponding pipeline and components produces high frequency small vibration. Instantaneous pressure shock often cause damage to hydraulic components, component of high frequency vibration will increase slightly system leak, also can reduce the service life of components, thereby affect the working reliability of the hydraulic system and bring hidden trouble to safety production.For cantilever machine such driven by hydraulic power machinery system, the traditional research methods can be divided into two sub-systems: mechanical, hydraulic, respectively, the mutual influence of both by defining the analog signals, the scientific nature and accuracy cannot be guaranteed. This paper based on the hydraulic and mechanical dynamics of cantilever machine structure, principle of the hydraulic system are briefly introduced. Then, on the basis of dynamic analysis, using CATIA to establish a three-dimensional model of cantilever boring machines, and the LMS. Virtual Lab Motion software will import the 3 d model, set up the machine after simplified dynamic model, and simulation of its two work cycle, cutting head movement curve drawing. Then, based on the hydraulic system, on the basis of theoretical analysis using AMESim software for cantilever machine tooling loop simulation research, according to the core components in system load sensitive variable pump model in detail, analyzes the characteristics of the flow and pressure control. Finally, based on the AMESim simulation platform, the cantilever type hydraulic simulation framework, set up the interface program to machine the machine LMS. Virtual Lab Motion dynamics model, which combines both integrated machine for liquid machine integration simulation model.By output characteristic trend model of specific working conditions are analyzed, and in accordance with the simulation of equilibrium output results of the model are verified., simulated on the basis of the actual conditions of operation process, by means of simulation experiment to the cantilever machine tooling loop job characteristics are studied, and according to the simulation results of equipment hydraulic system is improved. Make the speed of the lifting oil cylinder peak cutting arm dropped by 16.7%, speed fluctuation time dropped by 40.3%, lifting oil cylinder peak load of the cutting arm dropped by 5.4%, load fluctuation time reduced by 39.4%.The study results show that, with the aid of mechanical multibody dynamics theory and hydraulic technology, cantilever tunneling machine proceeding is feasible, this kind of modeling method have a referenced significance to other high-power machine liquid integration system research.