Research On Wheel Wear Of HXD2C Electric Locomotive

With the continuous development of high speed and heavy load railway transportation in China,the safety of train operation has become an issue of increasing concern to the whole society.As an important bearing component of locomotives,the quality of the wheel set is directly related to the stability of the train operation and the comfort of riding.Judging from the field application data,high-power harmonious locomotive wheel damage mainly includes tread abrasion,peeling,flange wear and wheel polygons,etc.,especially the abnormal wear of the flange has the greatest impact on the service life of the wheel set.Therefore,studying the problem of wheel flange wear is not only beneficial to improve the safety and stability of locomotive operation,but also can greatly reduce the maintenance cost,and has important engineering significance and economic value.This paper takes HXD2 C electric locomotive as the research object,based on the actual parameters of the locomotive and the running line,and uses the multi-body dynamics simulation software UM to establish the locomotive dynamic model to study the problem of wheel flange wear.First of all,on-site investigation of the repair and application data of this type of locomotive wheel pair,statistical analysis of the distribution of the thickness of the flange according to the axle position,it is concluded that the flange wear speed of the second and fifth axle positions of this locomotive is the fastest The six-axle position is followed by the three-and four-axle positions with slower wear,and the relationship between the wheel flange wear and the number of kilometers traveled is obtained.Secondly,the MiniProf Wheel profile measurement special tool was used to conduct on-site measurement of the wheelset profile data.Six wheels with typical flange thicknesses were selected from the measured data to represent six different wear states,and the wheels were worn from the standard profile I The entire wear process to the near-limit profile VI is analyzed.Thirdly,using the locomotive dynamic model established in UM,the Archard wheel-rail wear model is selected,and the line conditions are designed with the LKJ parameters of the locomotive.The iterative calculation method is used to simulate the wheel wear,and the results of the simulation calculation are compared and analyzed with the field measured data.The results show that under the same initial wheel profile parameters,after the locomotive runs 100,000 kilometers,the flange wear speed of the second axle wheelset is significantly faster than that of the first and third axle positions,which is morecomparable to the on-site investigation.Finally,the three dynamic indexes of the stability,smoothness and safety of locomotive running are verified and analyzed,and the results meet the evaluation standards of railway locomotives in China.As the locomotive repair system reform continues to develop in depth,this article puts forward the measures taken on the site of wheel wear on the basis of the actual locomotive repair and application,which ensures the safe operation of the locomotive while saving the cost of repair Great practical significance and economic benefits.