Discussion on high compressor shaft vibration
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This post was last edited by yxmqh on 2010-12-1 08:39. Let’s discuss: what are the common reasons for high vibration levels in centrifuges? ? ? 1: Our ammonia circulator is of single-stage centrifugal type, and the vibration of the speed increaser shaft has been quite high recently. Could you explain why? ? ? ? II: For our turbines, are the vibration levels of both the turbines and compressors quite high? ? Could you tell me the reason? ? ?
The original poster’s description is too general; vibration fault diagnosis is a discipline, and it’s difficult to make any judgments based on just these few sentences.
There are many reasons for vibration: whether the verticality of the shaft, the play, the sizes of various assembly clearances, and the deflection meet the standard requirements； Operation status of the bearings ； There are many reasons for the operating conditions of pumps
It is not clear whether there are any fluctuations in the system, what the oil temperature is, what the bearing temperatures are, and what the vibration trend is (whether it is gradual or sudden); these points need to be clarified by the original poster.
Vibration occurs when the rotor is unbalanced; if the electrical jump zone of your rotor is too large, this will also increase the vibration.
The reason for the vibration is not clear enough; please describe it in more detail
A detailed description of the vibration conditions is needed to conduct an analysis.
If the voltage isn’t high, it’s due to the instrument; we’ve had similar problems here
The question you’ve asked is too vague. It’s necessary to know whether the vibration increases suddenly or gradually, at what speed the high vibration occurs, and whether it exceeds the critical speed – you haven’t provided any of this information, so how can a judgment be made? Even if the reason were stated, it wouldn’t constitute very solid evidence.
There are many reasons for rotor vibration, the main one being: rotor imbalance； Poor coupling alignment ； Poor gear engagement in the transmission ； The device base is loose ； There is a lot of dust in the medium, especially in compressors that do not have self-cleaning functionality ； Unreasonable clearance between the sliding bearing and the shaft, as well as excessively high lubricant temperature, etc. The explanation provided by the original poster is too general to allow for further analysis.
Please specify whether the ammonia circulator has a single-stage cantilever rotor, as well as the unit model and structure, to facilitate analysis.