Abnormal noise when the compressor starts
Thread Content
Let me ask a simpler question: Loveliness – when the compressor starts in the morning, its noise is normal at first, but it becomes louder within less than a minute; the oil pressure rises slowly, and it drops slowly as well after the compressor stops running. After running it several times, it works properly and the sound is normal now. Is it related to the cold weather? The compressor is produced by Bengbu Liquefied Gas Compressor Factory, with the model number ZW-1.6
It’s not very clear what was said – what was the sound like?
It’s hard to describe; the sound is extremely high-pitched and harsh, not that rattling sound associated with foreign objects
?Why is the oil pressure rising slowly after startup? You should wait until the oil pressure increases before starting the compressor, right? Low oil pressure can affect normal operation
Yes, at first the compressor ran idle with no load, so the oil pressure rose slowly, and it also dropped slowly after shutdown. It’s different in summer: the oil pressure rises once the machine is started, and it drops immediately when it’s stopped. Is this related to the cold weather in winter?
It is likely that the abnormal noise is caused by poor lubrication. Compressors have specific requirements regarding the temperature of the lubricating oil; the minimum operating temperature depends on the type of oil used, as determined by the compressor manufacturer. It should generally not be lower than 20 degrees. In areas with cold weather, it is necessary to turn on the oil heater before starting the compressor in winter, waiting until the desired temperature is reached before starting the machine. The absence of an oil heater is a fault on the part of the compressor manufacturer. Oil heaters are usually not necessary in the south (although they are included in all units), but they are essential in the north. If one is not available, it is necessary to start the oil pump in advance to circulate the oil and warm it up before starting the compressor. Additionally: I have never worked in the north. Regarding the slow increase in oil pressure mentioned by LZ, it can be attributed to low oil temperature and high oil viscosity, which may lead to pump cavitation and increased flow resistance in the oil pipes (especially at the fine filter). The oil pressure referred to by LZ is likely the pressure after the fine filter; it is recommended to also monitor the pressure before the fine filter. The pressure difference between before and after the fine filter should not exceed 0.1 MPa. If this difference is too large, the filter elements should be cleaned promptly. Do not start the machine when the oil pressure is abnormal – what you consider to be normal operating conditions may actually indicate damage to components such as the compressor bearings, resulting in the need for major repairs soon after the machine starts operating. :Q
Thank you all! I’m sorry for giving the ratings late; I just figured out how to do it: loveliness: