Analysis of the causes of piston rod fracture in cyclic hydrogen compressors
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Hello, friends. Recently, our company’s circulating hydrogen compressor experienced a sudden reduction in its circulation rate by half during operation. Upon investigation, it was found that the piston rod had broken. I would like to ask everyone what the cause is; my workshop is equipped with a wax oil hydrogenation unit. Operating pressure 160. Appendix
Looking at the picture, this piston is double-acting. Check whether there are any dents on the piston surface on the side of the piston rod, and whether there have been any changes to the anti-loosening mechanism of the piston rod. When such a phenomenon occurs, the cause must be sought in the structural changes of the piston rod. If there’s no problem, then it must be attributed to the material itself. After a thorough inspection, replace the piston and decide further based on its performance in future use. With such high pressure, it’s difficult to determine what caused this; one can only look for reasons in the aspects that might lead to structural changes. For reference.
There are many reasons for piston rod failure; you can search the forum for posts on this topic. Reasons for piston rod breakage in reciprocating compressors; Reasons for piston shaft breakage in compressors; Breakage of the piston rod in the first stage of a reciprocating compressor; Problem of frequent piston rod breakage in 6MD50 type piston compressors
First, tell us how many years it has been since you last conducted flaw detection tests; it’s clear from the images that there is fatigue
Bro, please check the cylinder carefully to see if there are any cracks in it.
It is usually caused by fatigue damage; it is recommended to replace it every three years, with non-destructive testing carried out during the mid-term maintenance
Great stuff! ! Thank you, OP! !
If this problem occurs under normal conditions with no violations, the only possibility to consider is the impact of a high-temperature hydrogen environment; could there be an issue with the material? PS: Seeking answers from authoritative experts in the future.