Failure Analysis And Tower Structure Stress Simulation For HXD1C Electric Locomotive

The air dryer purifies and dries the compressed air to remove the dust,impurities,oil,and moisture contained in the compressed air to ensure that the brake system and other air-using equipment of the locomotive can work reliably for a long time.In recent years,the national railway network has been continuously expanded and extended.Some lines are in harsh environments,and the geographical environment and climatic conditions are relatively complicated.During train operation,some extreme weather may be encountered,such as sand storms,low temperatures,rain and snow,etc.When the ambient temperature of the locomotive is low,it may happen that the ambient temperature is lower than the dew point temperature.At this time,moisture will appear in the air pipe system.If the compressed air is not dry enough,the condensed water may freeze in the ventilation pipe.In this case,it is easy to cause the locomotive to break,which will greatly affect the driving safety.This article takes HXD1 C electric locomotive dryer as the research object,analyzes the cause of its failure,calculates the pressure dew point under the maximum operating conditions,and conducts a finite element analysis of the dryer tower structure.First of all,this article takes the failure analysis of.For the failures in practical applications such as molecular sieve powdering,severe oil pollution,water accumulation inside the drying tower,water accumulated in the dryer tower,sewage outlet large exhaust for a long time,damaged structural parts of the dryer and external environment-induced failures,these types of faults are discussed in depth from multiple aspects and levels.Secondly,in view of the failure caused by environmental factors,the dew point temperature of the locomotive wind source system after pretreatment in a specific environment is calculated in this paper to be 43 °C,the post-treatment pressure dew point of the wind source system at a wind pressure of 1100 KPa is-36.4°C.Then calculate the water vapor content Under the wind pressure of 700 KPa,the water released from the pre-treatment of the wind source system is 15.673 g,and this water can only be discharged to the atmosphere with the drainage pipe.After the air source system is post-processed,the moisture in the air pipe is about 0.19072 g.Therefore,about 99.8% of the compressed air purified by the dryer is adsorbed.By calculating the water vapor content of the locomotive wind source system before and after processing,it can be known that the water vapor content of the wind source system after pretreatment is much larger than that of the post treatment.Therefore,in the implementation of locomotive pipeline cold protection operations,it is important to protect the front wind source systemFinally.Aiming at the damage of dryer structural components,the finite element analysis is performed on the structure of the dryer tower.After calculation,it is obtained that the structure of the drying tower and the tower cover meets the design requirements.At the same time,the stress distribution and deformation distribution of the drier filter under four different working conditions are analyzed,and it is concluded that the drier filter will undergo plastic deformation under two of the working conditions.And put forward some suggestions for improvement.