Failure Analysis And Simulation Research Of Railway Locomotive Braking System

With the rapid development of railway technology,locomotive braking technology changes with each passing day,based on the microcomputer control of the third generation of electro-air control braking system has been widely used,the use of CCBⅡ actuator HXD3 locomotive in A locomotive depot allocation proportion is higher and higher.Although CCBⅡ brake has high safety redundancy characteristics,and can realize the self-diagnosis function,to ensure the continuous safety and stability of transportation and production to provide a guarantee,but from the perspective of daily use and maintenance,still has a high failure rate.After the failure of CCBⅡ actuator,due to its integrated and modular structure,the cause of the failure is often unable to be directly determined,often showing the characteristics of unrepeatability and hidden causes,which brings some difficulties to the accumulation of experience in on-site troubleshooting and the scientific control of maintenance costs.Therefore,it is of great significance to study the fault principle of CCBⅡ brake and simulate the fault phenomenon to guide the on-site maintenance work and verify the effectiveness of the fault treatment method.In this paper,through literature analysis,mathematical statistics analysis and model analysis,the failure law of the development history of brake,the braking system are analyzed,and based on the type HXD3 electric locomotive,high failure rate of brake systems on CCB Ⅱ brake were studied and analyzed the control relationship between the main components of the braking system and the working principle of the empty EPCU electric control unit,using AMESim simulation software module of EPCU and CCB Ⅱ brake as a whole has carried on the qualitative analysis,model building and Combined with the typical failure cases in the application process to verify the effectiveness of parts replacement,truly combining the brake theory with practical application,will better serve the daily on-site maintenance and reconditioning work,and then achieve the high quality development of the locomotive operation department.