Fan Screeching Noise
Fan Screeching Noise
(OP)
Hi All,
I have a NYB vane axial fan with a 25 HP motor on a pulley and it draws about 18 HP running load. On startup the fan screeches very very loudly. A pulley alignment check was made by the fan contractor and supposedly everything is okay. The belt is tight. The belt supposedly shows powdery wear on all sides of the belt. The fan aligment contractor advises the motor has too much torque capability and the belt is slipping on startup. He advises to put on a vfd to get a softer start. Something that he is saying is not right. Any comments? Thanks
I have a NYB vane axial fan with a 25 HP motor on a pulley and it draws about 18 HP running load. On startup the fan screeches very very loudly. A pulley alignment check was made by the fan contractor and supposedly everything is okay. The belt is tight. The belt supposedly shows powdery wear on all sides of the belt. The fan aligment contractor advises the motor has too much torque capability and the belt is slipping on startup. He advises to put on a vfd to get a softer start. Something that he is saying is not right. Any comments? Thanks





RE: Fan Screeching Noise
RE: Fan Screeching Noise
RE: Fan Screeching Noise
Check that the belts themselves are a matched set, there will usually be code numbers on the belt.
If somebody has changed a worn belt with an odball, they may not be tensioning evenly, allowing one or two belts to slip.
B.E.
The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor
RE: Fan Screeching Noise
RE: Fan Screeching Noise
RE: Fan Screeching Noise
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Fan Screeching Noise
RE: Fan Screeching Noise
Also consider going with cogged belts unless you are already using them.