Dynamic Simulation Study On Interaction Between Shearer Driving Wheel And Sliding Boot And Pin Rail

Due to the poor working environment in the underground mines,the different directional misalignment clearance of pin rail and the middle groove will occur after the scraper conveyor installation or long-time high-load work.The large impact load will be produced when the shearer passes through the scraper conveyor with clearance,and the stress-strain will be generated by the driving wheels,the guiding boot and the flat boot.Thus,in this paper,the boot load was obtained through experiments,and then the dynamics simulation analysis was used to study the contact collision characteristics between the shearer driving wheel,the guiding boot,the flat boot and the scraper conveyor.The specific research contents are as follows:(1)The loads of the driving wheel,the guiding boot and the pin rail of the flat boot of shearer in coal cutting were obtained by experiments in the National Energy Coal Mining Machinery Equipment R&D(Experiment)Center.Simulating the actual environment under the real mine,the test platform contains simulated coal wall,hydraulic support,shearer and scraper conveyor,and the equipment test data is collected and processed by the assembled sensors.which provided the data support for dynamic simulation analysis.(2)The dynamic model of contact between the shearer moving mechanism and the scraper conveyor was established.The ANSYS software was used to study the three-dimensional contact between the driving wheel of the shearer and the pin rail of the scraper conveyor under different installation positions.Compared with the normal working conditions,the contact stress of the driving wheel were significantly increased when there were the displacement,the misalignment and the misalignment angle of the driving wheel,and the maximum contact stress of the driving wheel under different working conditions was obtained.(3)The contact dynamics model between the guiding boot of the shearer and the pin rail of the scraper conveyor was established.The three-dimensional contact collision characteristics between the guiding boot and the pin rail under different installation positions were simulated.The results showed when the adjacent pin row has a larger installation clearance,the maximum contact stress on the guide shoe is greater.When the pin rail has a greater difference in mounting height,the maximum stress on the guide shoe increases.When the pin rail has an increased installation angle,the maximum contact stress on the guide shoe is continuously increased.It is found that the larger the gap of the pin rail error under different working conditions is,the larger the change rule of the guiding shoe is.(4)The contact dynamics model between the flat boot of the shearer and the middle grooveof the scraper conveyor was established.The contact collision characteristics between the flat boot and the middle groove under different installation positions of the adjacent central groove were simulated.The results showed that when when the installation gap of the middle groove is continuously increased,the maximum contact stress of the smooth shoe is continuously increased.When the installation height difference in the middle groove is continuously increased,the maximum stress value of the smooth shoe is also continuously increased.When the mounting angle error of the middle groove is continuously increased,the maximum contact stress of the smoothing shoe also becomes larger.It is found that the larger the error gap of the middle slot under different working conditions,the greater the variation of the stress on the smoothing shoe.There are 98 pictures,6 tables,and 67 references in the paper.