There is abnormal noise in the second cylinder of the reciprocating compressor!
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This post was last edited by Wait ing on 2012-6-6 15:40. There is a hydrogen compressor of the model LW-3/2-21, and now there is abnormal noise inside the second cylinder. It’s not a very distinct noise; it doesn’t sound like something is causing it, rather it’s similar to the sound of air leaking from the packing area. The noise is irregular – sometimes it’s normal, while the temperature of the discharge valve under operating conditions is about 20 degrees higher than normal. Everyone, please help analyze it! The problem has been identified: it was the wear and breakage of the piston rings that caused air leakage, with the breakage occurring right near the valve, which is why the valve temperature increased. Now there are more questions: there are two piston rings in total, one of them is slightly worn, and the broken ring has two breaks. I suspect that the wear is caused by too small a side clearance during assembly; do anyone else have different opinions?
It’s probably a valve issue; check the valve
This post was last edited by lovestory on 2012-5-15 at 23:52. Check the intake valve at that level; if the spring of the intake valve is broken or has broken off and fallen into the cylinder, such a sound would be produced. The valve elements of hydrogen compressors are made of plastic, and when they break or fall into the cylinder, the resulting noise will be muffled. Based on the exhaust temperature, it seems that this issue is likely related to this problem, but too little information has been provided. It would be useful to know if there are any changes in pressure or gas flow, as well as how long the piston ring and support rings have been in use! It is recommended to shut down the machine for further inspection
If the pressure between stages is normal, it indicates that the first stage is functioning properly and the inlet valve of the second stage is also in good condition; only the exhaust valve of the second stage needs to be checked. If the inter-stage pressure is high, it indicates a fault in the secondary intake valve. If you have any questions, feel free to contact me via the in-site messaging. . .
Oil-free lubrication; this may be due to excessive wear of the support ring or packing ring.
The air valve is leaking air :lol Time to stop and carry out maintenance..........
Firstly, a high temperature of the valve definitely indicates that the valve is faulty; abnormal noises may be caused by a faulty valve, which leads to some gas leaking back
Based on the above description and analysis, it is likely that the air valve is leaking. It is recommended to stop for maintenance. Daily maintenance of compressors is very important; it’s necessary to be observant and keep detailed records of their operation, noting data such as gas temperature, pressure, and flow rate. By observing more, listening more, and drawing more conclusions, over time you will be able to accurately analyze various abnormal situations.
Look for the reasons from the following points: 1. The set screw of the air valve is loose; are the fastening screws of the air valve itself loose as well? 2. Are the nuts that secure the piston rod to the piston loose? 3. There is a large gap between the cylinder and the piston, which causes a knocking sound
Wear or abnormalities in the piston rings, as well as friction from foreign objects inside the cylinder, can also cause the exhaust temperature to rise along with abnormal noises； Issues such as a loose piston rod cap, faulty connecting rod bearings, or loose fastening points can also cause abnormal noises inside the cylinder.
I have encountered this issue as well; I am using 6MD32-314-25 series reciprocating compressors, and the same problem occurred in stage 2 as well. Inspection method 1: Check whether the piston rings are worn and whether the oiler is functioning properly to supply oil. 2. Check whether the intake and exhaust valves are damaged, with any backflow of air. 3. Check whether the oil and water in Section 1 have not been properly separated, resulting in slight liquid carryover to Section 2 and preventing the lubricating oil from forming an oil film. 4. The piston rings and support rings are installed in the wrong positions; their mating surfaces are on the same straight line, preventing complete sealing. (This phenomenon can be determined by observing the outlet pressure for a period of time.) 5. The cylinder is worn out, with gaps between the piston and the cylinder walls. The above are the things I have come into contact with in my daily life; I hope everyone will share their opinions. Thank you