Study On The Influence Of The Dumper Pressing Size On The Car Body

A dumper is a specialized railway equipment for unloading bulk cargo.Compared with other unloading machines,the dumper can unload more cleanly and efficiently with strong unloading capacity and be more highly automated,which can improve the working conditions of the workers significantly and reduce the amount of labor,so that it can greatly reduce the operating cost of enterprises.At present,the dumper is applied universally in large enterprises that handle bulk materials in large quantities,such as ports,coal industry,coking industry,power stations,and metallurgy.With the widespread use of dumpers in our country,the safety problems caused by a pressing mechanism have been gradually highlighted.The pressing mechanism is the core component of a dumper,and the pressing beam is its most important component.The pressing beam has many kinds and sizes.Therefore,there is little research result about the influence of the pressing beams of different sizes on the rolling force of railway vehicles.In practical work,because of the complex working conditions and severe environment of the pressing mechanism,the pressure beams cause deformation and other damage to the side of the gondola car,which may bring great security risk,and even seriously affect the service life of dumper and the railway vehicle.So,the research background of this paper is C bicycle dumper,and the object is the body of C70 universal type gondola car.In this careful investigation and study,at first,the discharge amount of the bulk material is calculated in car body under different angles during the tipping process by MATLAB,so that the pressure can be calculated which is generated by the pressure beams under different perspectives.Secondly,the body of gondola car is modeled and assembled by Solidworks according to railway gondola car parameters,steel structure and other standards and existing experience.The corresponding calculation results are analyzed through the post-processing function of software of finite element analysis ANSYS.With the increasing flip angle,it can be found that the pressing force of the pressure beams on the gondola are increasing continuously,and the pressing force is the largest when the pressure beams turn over to 175°.The pressure beams are shorter,and the pressing force is larger.Finally,according to the calculation results,the best position is analyzed which the pressure beams fit.The optimal position of the fan-shaped pressure beams is that each of the four pressure beams acts on the same upper side beam,and each of the two adjacent pressure beams keeps the same distance close to the outer side of the end wall and the adjacent inner side.The most suitable position of the vertical pressure beams is that the eight pressure beams are in a group of two,which respectively act above the position where the two adjacent side wall columns on the side near the end wall are connected with the upper side beam.In the analysis of the existing 8×200mm,8×400mm,and 8×600mm vertical pressure beams,it is found that the stress generated by the pressure beams on the gondola also decreases,as the sizes of the pressure beams increase.