Troubleshooting oil leakage in the scraper ring of reciprocating compressors
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Dear experts, I would like to ask for your advice: the oil scrapper ring of a reciprocating compressor is leaking severely. Does anyone have any similar experience in dealing with this issue? All the issues that came to mind have been addressed, but there’s still something missing; please advise
Oil leakage from the wiper ring of a reciprocating compressor can be caused by the following reasons: 1. The wiper ring is worn out or installed improperly; it is necessary to check its condition and replace it with a new one if needed. 2. The gap between the oil ring and the cylinder block is too large; check the gap and adjust it. 3. Wear of the compressor cylinder or piston causes oil leakage; inspect and replace the worn parts. 4. Excessive high-pressure oil or lubricating oil – adjust the oil supply volume. 5. If the seals are aged or damaged, replace them. Confirming the above issues and addressing each one should resolve the oil leakage problem with the oil scrapper ring. .
Thank you for your guidance. The spare parts have been replaced, and the assembly as well as the clearances have been adjusted in accordance with the specifications in the drawings
It is recommended to check whether the wear on the piston rod is excessive. During installation, move the sealing ring and oil-scraping ring to the working section of the piston rod to check whether the sealing ring needs to be trimmed. Typically, the wear of the piston rod can be detected by feeling it with the hand, or by using a ruler against the worn surface of the piston rod. For reference.
If the oil scrapper ring shows no significant wear and the installation clearance is within the acceptable range, consider enlarging the size of the oil return hole, or increasing it or even replacing it with an oil return groove. The main reason for the failure of the oil scrapper ring is that the oil scraped off by it cannot return promptly.
Check the drawings to see if there is an issue with the installation direction, examine the fitting dimensions of all seals, and check whether the piston rod and oil scrapper rings have any scratches; in principle, the leakage from the oil scrapper rings is very small.
If there were no leaks during previous operations and the installation was successful, it might be due to wear on the piston rod, an inappropriate diameter for the piston rod, or issues with the oil return compensation. It mainly depends on the specific pattern of oil leakage from the oil wiper ring; the oil flows downward along the assembly cover, dripping. It still splashes out. This is important.