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Safety Analysis of Coupler Buffer in Heavy Load Locomotive when Emergency Braking on Long Steep Slopes

With the rapid development of national economy, the heavy load transportation has become an important means in the field of railway freight transportation, and the heavy load locomotive equipment has also developed rapidly. However, in the actual operation, some road bureaus found that the elastic cement buffer QKX100 used on the heavy-duty locomotive would leak some cement when locomotive encountered long steep slopes. In this paper, on the basis of structure analysis of cement buffer, the heavy-duty train longitudinal dynamics model is built, and the longitudinal dynamic calculation is realized under the emergency braking of heavy duty locomotive. Combining the structure principle of cement core, the paper analyzes the causes of hook slow system’s failure and puts forward: in order to improve the buffer work state, the appropriate locomotive operation, the reasonable train Marshall and the stringent buffer production control should be adopted.