What are the reasons for the increase in vibration levels of cooling tower fans?
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We have 3 cooling tower fans, and the operating vibration level of one of them varies between 1.5 and 2.2 depending on temperature changes and oil temperature. In other words, when the temperature is low and the oil temperature is below 70°C, the vibration value is low; on hot days, once the oil temperature rises above 70°C, the vibration value increases to 2.2. May I ask what causes the increase in vibration levels of the cooling tower fans?
As the temperature changes, if it remains within the allowable range, the evaporation rate may increase and more water droplets may accumulate on the leaves, disrupting the original dynamic balance; however, if it is still within the acceptable limits, there’s no need to worry
Agree with the person above. Another possibility is that there is a fault in the return water spray distribution system, such as blockages or perforations, resulting in uneven distribution. This results in uneven rising hot air currents, affecting the dynamic balance of the fan blades.
Theoretically, as the temperature rises, the viscosity of the lubricating oil decreases, its lubricating properties also decline, and this can lead to increased vibration.
First, you need to tell everyone about the vibration at the location you measured Do you mean the blower or the motor? Please make it clear so that everyone can provide you with a more comprehensive analysis
As the water temperature rises, the lubricating oil temperature in the unit also increases; the viscosity of the oil decreases, the oil film on the bearings becomes thinner, the lubrication effect weakens, and as a result vibrations occur.
Whether the vibration value is within the acceptable range, and there are many possible causes; it is recommended to refer to the graph.
Cooling tower fan reducer inside the blower hood