The blower has high vibration
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Hello everyone, one of the fans in our factory has high vibration levels, but by loosening the bolts on the inlet volute, the vibration decreased. What is the reason for this?
Mainly: 1. Shoddy design and manufacturing of the blower frame； 2. The base has not been filled with cement to increase its weight
Basic issues: the fan itself vibrates, which may be caused by the shaft or bearings.
There might be an issue with alignment; check the coupling as well
The base is not reinforced with cement to increase its weight
You loosened the volute, and it absorbed the vibrations, so the vibrations decreased. But this is rather dangerous; it’s better to find the specific source of vibration. The question only mentions large vibrations, but it doesn’t specify exactly where, in which direction, and to what extent the vibrations occur in various locations What is the bearing temperature?
The vibration at the load side of the motor reaches 23 mm/s; it can be reduced to 5.5 mm/s after loosening the volute bolts. The bearing temperature is around 60 degrees. This fan is a small fan, with its impeller integrated with the motor shaft
The fan base is of steel construction and has been reinforced twice
Could you please explain why loosening the volute bolts helps to absorb vibrations?
The fan impeller and motor shaft are integrated; it is a small fan