摘要
电加热管烧毁是HXn5型机车空调机组在运行中出现的主要问题之一。首先对烧毁电加热管进行试验,找出电加热管烧毁的原因;然后对烧毁原因进行分析,得出要解决电加热管烧毁问题,一方面需要对电加热管的参数进行优化,另一方面需要对电加热管的工艺进行改进。在电加热管参数优化设计中,以影响电加热管的主要参数为因子,针对电加热管的表面负荷与表面温度这两个指标,进行DOE优化设计试验,得出最佳参数组合。在电加热管的加工工艺中采取了二次高温去应力处理和U型压扁处理,并将弯管工艺过程中退火机瞬间导电改为延时导电,达到彻底排潮、降低应力的目的。应用证明,利用新参数、新工艺生产的电加热管,能够保证在工况条件下稳定工作,击穿、烧损几率大大降低。
According to the present research of failure analysis, tubular electric heating element failure is one of the ma- jor problem. Focus on the air conditioning unit, investigation and research the main problem. After the analysis to solve the problem of the tubular electric heating element burned, on the one hand, we need to optimize the parameters of the tubular electric heating element, and on the other hand, we need to improve the process of tubular electric heating element. On the basis of DOE technology, conduct the optimization design towards the main parameters. During the research and develop- ment phase of this kind of new type tubular electric heating element, the best parameter combination is decided. Aiming at the problem of local breakdown of tubular electric heating element, after analysis and experiment, it has been brought for- ward new technology with two-time high temperature treatment and compressedin processing technology of the new type tu bular electric heating element,then the water has been excluded completely, and the internal stress is reduced. Application proves that the tubular electric heating element with using of new parameters and process can guarantee the stable work in operating conditions, and breakdown and burning rate has been greatly reduced.
出处
《新技术新工艺》
2015年第12期11-13,共3页
New Technology & New Process
关键词
电加热管
机车空调
DOE
新工艺
tubular electric heating element, locomotive air conditioner, DOE, new technology
