Failure analysis of oil tubes attached to ethylene compressor
A failure analysis is performed for an oil tube of the ethylene compressor.The tube is made of a stainless steel with diameter of 3/8 inch.It is broken at the connection with a Swagelok nut.Both macroscopic inspection and microscopic scanning electron fractography are carried out.The results indicate that the failure of oil tube was caused by high cycle fatigue due to transverse vibration.Fatigue crack initiated from the sharp point of groove related to the severe stress concentration.To improve the reliability and optimize the design of oil tube of ethylene compressor,the minimum length of oil tube along the vertical direction is suggested and thus the fatigue load exerted on the oil tube is reduced.On the other hand,the machining approach should be selected carefully for the oil tube to improve the surface quality and thus eliminate the possibility of fatigue initiation.
Failure analysis Oil tube Vibration Fatigue
Qiongqi Wang Fu-Zhen Xuan Zhengdong Wang
MOE Key Lab.of Safety Science of Pressurized System,East China University of Science and Technology,Shanghai 20023 7,China
国际会议
成都
英文
473-477
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）