Plow Multi-Body Dynamics Analysis And Fatigue Life Prediction

China thin Seam coal resources rich, with coal resources of increasingly reduced, thin seam face of mining has became improve coal production production of a direction, and planning coal machine as mining thin Seam coal of important equipment, also gradually was coal machine production units by attention, have increased on planning coal machine of research work, but due to domestic on planning coal machine of research started more late, special on planning coal machine machine of mechanical performance research of relative less, led to planning coal machine of reliability and life relative weaker, for above problem, In this paper, do the following:First used single freedom vibration theory, ignored planning head, of chain quality, factors of effect, will planning head considered concentrated quality block, established has contains planning coal machine drive sprocket polygon effect of single freedom dynamics model; again to single freedom model for based, integrated consider planning chain of quality, and planning chain of pre tight force and the before and after drive system vibration, more pigment, established has planning coal machine more freedom dynamics model. To planning coal mechanic condition Xia of load for load incentive, used method, on planning coal machine machine dynamics model for solution, get has planning chain tension and the planning head vibration of time course curve, and on extraction has planning chain tension and the planning head vibration of Shi domain features value; used compared method, get has workers condition side chain tension of changes characteristics, and analysis has different pre tight force and different planning cut depth on planning chain tension of effect. Finite element simulation technology, the static model of cold chain is established, studied under maximum working load, plow chain of distribution of stress and strain State plow chain by using finite element software ANSYS Workbench modal analysis to study the natural frequency, are ten natural frequencies and mode shapes. While plow chain under random load fatigue damage analysis and research obtained plow sprocket slot maximum stress values are. Finally, using rain-flow counting method and fatigue damage cumulative theory method for life prediction of the plow. Got the plow in life time under specific working conditions. Conclusions for improved design and plow provides the theoretical basis for coal plough in different dynamic characteristics under the condition of.