摘要
为了降低换热器的成本,平行流技术的使用正越来越普及。但是平行流换热器存在机械强度低、不耐疲劳的特点。本文针对平行流最容易出现的疲劳断裂原因进行分析,发现是由于其内部压力和热应力造成的疲劳破坏。针对该原因重新修改此处的设计,并使用FEA对设计修改前后的应力进行对比,验证设计修改的正确性。
In order to reduce the cost of heat exchanger,the parallel coil is more and more popular in refrigeration industry,but parallel coil has the characteristics of low strength and low anti-fatigue.Analyzes fatigue breakage and finds out that the root cause of failure is due to the hoop stress and thermal stress which is over the strength.According to this reason,making improvement for the design,and using FEA methodology to compare the stress between the old design and new one proves that the new design is much better than the old one.
出处
《制冷与空调》
2010年第2期31-34,共4页
Refrigeration and Air-Conditioning
