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When a belt conveyor is in operation, its drive mechanism, drive rollers, reversing rollers, and idler sets will produce abnormal noises in case of problems. Based on abnormal noise, equipment failures can be identified. (1) Noise generated when the idler rollers of a belt conveyor are severely eccentric. During operation, belt conveyors often experience abnormal noises and periodic vibrations in their idler rollers. The main reason for the noise generated by belt conveyors is the uneven wall thickness of the seamless steel pipes, as well as the high centrifugal force, which leads to noise production. On the other hand, during the processing of idler gears, the large deviation between the centers of the bearing holes at both ends and the center of the outer circle also generates significant centrifugal force, resulting in abnormal noise. (2) Noise is generated when the two shafts of the belt conveyor coupling are not aligned. The abnormal noise generated by the motor at the high-speed end of the drive unit, together with the reducer or the coupling equipped with brake wheels, has the same rotation frequency as that of the motor. When such noise occurs, the position of the belt conveyor motor and reducer should be adjusted promptly to prevent the breakage of the reducer’s input shaft. (3) Abnormal noises from the reversing drum and driving drum of the belt conveyor. During normal operation, the noise from the reversing drum and the drive drum is very low. When abnormal noise occurs, the bearing is usually damaged. The main reasons are excessive or insufficient clearance, shaft misalignment, oil leakage or poor oil quality, as well as inadequate sealing of the bearing end caps, all of which lead to bearing wear and increased temperature. At this point, the leakage points should be eliminated, the lubricating oil should be replaced, and the bearings should be replaced in large quantities. (4) Belt conveyor reducer noise. The reasons for abnormal vibration or noise in belt conveyor reducers include loose foot screws, loose wheels or wheel screws, severe tooth loss or wear of the gears, and lack of oil in the reducer; these issues should be repaired or replaced promptly. (5) Belt conveyor motor noise. There are several reasons for abnormal vibration and noise in belt conveyor motors: excessive load ； Low voltage or two-phase operation ； Loose anchor bolts or wheels ； Bearing failure ； Inter-winding short circuit in the motor. The inspection should be stopped, the load reduced, and it should be checked whether the screws are loose and whether the bearings are damaged. (6) Noise caused by damaged bearings inside the belt conveyor. The inner bearings of belt conveyors usually require stable supporting capacity. After long-term operation, the performance level of the bearings **decreases**, and they are prone to damage under high pressure. In summary, it is the issue of abnormal noise affecting belt conveyors; I believe my explanation will be helpful to you.