Dynamic Analysis Of Typical Working Conditions Of Shearer

According to the dynamic analysis of a one-zero component,it is difficult to accurately get the force situation and the actual strength of the key parts of the shearer,for example,the rationality analysis and strength calculation of the supporting slipper,the connection of the traction part,the guiding slipper and so on.There is a direct or indirect relationship between the force of the shearer and the force between the components.Therefore,in order to analyze and accurately solve the root cause of the failure of the key components,it is one of the prerequisites for solving the failure of the key components to carry out the force analysis of the shearer.Therefore,this paper first takes the coal shearer as the research object to carry on the dynamic analysis,and then analyses the stress situation of each component of the shearer in order to provide theoretical guidance for solving the failure.In order to make the simulation more close to the actual working conditions and to observe the stress and strain distribution of the fuselage of the shearer,the flexible treatment of the fuselage is carried out,and the rigid and flexible coupling dynamic model of the shearer is established by the necessary assumptions and simplification,and the multi body dynamic software ADAMS junction is used.It is of great significance to carry out dynamic simulation for different working conditions.First,using the method of cutting the coal wall of the shearer drum,the finite element model of the cutting simulation of the drum and the coal rock in the normal cutting and inclined cutting conditions is established.The simulation study on the coal wall of the drum is carried out to obtain the cutting load of the drum,and the cutting load of the shearer drum is calculated by using the theory of the cutting force of the drum.The theoretical calculation is carried out.The cutting load of the above two methods is compared and analyzed,and the cutting simulation load is selected as the external load of the dynamic simulation model of the shearer,which is applied to the cylinder center of the rigid flexible coupling machine model of the shearer,and the dynamic imitation is carried out in different working conditions.Secondly,using the ADAMS multi body dynamics software to simplify the unimportant structural features on the whole machine of the shearer,the finite element software ANSYS is applied to the flexible processing of the fuselage of the shearer.Based on the knowledge of the hydraulic control system,the hydraulic spring system is replaced with the hydraulic spring system,and the actual cutting is combined with the actual cutting.In this paper,the rigid flexible coupling virtual prototype model of the shearer with different working conditions is set up,and the dynamic simulation analysis of the whole machine is carried out mainly in the different working conditions,such as the normal stable cutting condition,the inclined cutting mode,the slow slope(upper and lower slope coal mining)and the impact load of the front and rear shearer drum.Then,the cutting load of shearer drum in the corresponding working condition is applied to the center of mass of the shearer drum in the corresponding working condition,and the corresponding working condition parameters are set to solve the simulation.After the simulation,the stress analysis of the whole machine and key parts of the shearer was carried out by ADAMS post processing.The stress and strain analysis of the fuselage traction part under the non working condition was obtained,the weak link was determined and the improvement suggestion was put forward.Strength fatigue life analysis.Finally,the static strength analysis and fatigue life analysis of the key parts are carried out,which provides a reference for the study of other structural components.