Research On Mechanical Characteristics Of Bogie And Wheel Components Of Power Stabilized Vehicle

With the rapid development of railway transportation in China,the requirement for the quality of railway line maintenance is getting higher and higher.In the design process of large-scale road maintenance machinery and equipment represented by power stabilizer,steering axle box spring,as one of the buffer devices,plays a vital role in connection,positioning,vibration reduction and shock cushioning.Its reliability has become an important factor to ensure the safety of railway train transportation.However,in recent years,the breakage of the axle box spring of the power-stabilized vehicle occurs from time to time,and most of the breakage occurs between the support ring and the effective ring.In addition,the friction between wheel and track belongs to dry friction,which directly affects the stability of large road maintenance machinery during operation.Especially in the operation of WD-320 power stabilizer,when the speed reaches 70 km/h,there will be obvious vehicle shaking phenomenon,which will cause great security risks to the operation safety.In view of the above problems,this paper carries out the following research:First of all,the structure and working principle of the power stabilized vehicle bogie were introduced,the design parameters of the power stabilized vehicle bogie were selected,and the performance characteristics of the bogie were analyzed.Secondly,parametric modeling design of axle box spring of power-stabilized vehicle is carried out.According to the analysis results of the causes of car shaking,three quarters of the upper and lower ends of the spring are cut off to make the upper and lower ends become plane,which not only improves the load-bearing performance,but also makes the spring more stable on the axle box seat and reduces the deviation load.In addition,since the length of the removal is longer than the diameter of a spring,a spring support coil is installed at the end of the spring to compensate for the length of the removal part.Then,the mechanical analysis of the designed power-stabilized axle box spring is carried out by using ANSYS.The results show that the designed single coil spring at axle box position meets the shear stress requirements of spring steel,and the influence of theclearance between support ring and effective ring on the bearing capacity is analyzed.It is found that when the clearance is 4 mm,the spring's shape variable,XY shear stress and total stress are the smallest.In addition,the spring mode is simulated and analyzed,and the results are obtained.The first six modes of the spring,the first mode frequency of the spring is 18.124 Hz,which is larger than the excitation frequency of 15 Hz under normal working condition,so the system can work normally.Finally,the wheel-track numerical simulation model is established.Through the analysis of the stress and deformation distribution of ANSYS,it can be seen that the maximum contact stress is at the top of the track,and the wheel-track wear is also here.In addition,the waist of the track is a stress center,which has no contact.However,due to repeated stress,cracks will occur.Through the above research,we have a deep understanding of the axle box spring of power-stabilized vehicle,and put forward measures to strengthen the structural performance,in order to meet the requirements of today's high-speed power-stabilized vehicle.In addition,the established wheel-track numerical model can lay a foundation for further research,such as the contact creep problem of flexible track wheel-rail,the design of damper wheel and the analysis of wheel-rail noise.The above research is of great significance to improve the safety,stability and comfort of the whole power stable vehicle.