Fluid Coupling Noise?

[Bluenoser337]

Do fluid couplings ever howl like an air horn when they slip. I've got 2 x 400HP motor/gearbox units driving a conveyor and recently when it gets at about 60% rated load something starts howling in the area of the couplings. Not sure if it a slipping drive roller, coupling, or something else. Everything is fairly new. Any suggestions on what to look for?

 

[CouplingKing]

Fluid Couplings do not usually howl. They throw off an awful lot of air when they are going at full speed, this air movement through a guard could be the source of the noise.

Also do you mean 60% speed or 60% load. If you mean load then I would examine any belts and bearings in the area.

If the equipment is fairly new as you say then contact the manufacturer.

CK