For a 5000kw electric compressor, there is a harsh whistling sound coming from the gearbox; help identify the cause.
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It is a harsh whistling sound, and it’s difficult to locate its source; the sound gets louder when approaching the gearbox, so it is suspected that the gearbox is producing this sound. The harsh noise is irregular in intensity, varying between high and low levels. Checks on the gearbox’s displacement, vibration, and temperature showed no changes. It just appeared in these 2 days. Has anyone among you encountered this situation?
Based on the described situation, the presence of a harsh whistling sound may be due to the following reasons: 1. Wear or damage to the gears inside the gearbox. When the gears wear down to a certain extent, they produce a harsh noise during operation. It is recommended to check the wear of the gears inside the transmission; if any damage is present, the gears need to be replaced. 2. Insufficient or poor lubrication of the gearbox oil. Insufficient lubrication or poor lubrication can lead to increased friction inside the gearbox, resulting in abnormal noises. It is recommended to check the level of lubricating oil and whether the lubrication system is functioning properly. 3. Wear of the gearbox bearings. Bearing wear can cause the gap between the shaft and the bearing to increase, resulting in abnormal noises during operation. It is recommended to check the bearing wear; if there are issues, it needs to be replaced. 4. The gear mesh clearance inside the gearbox is not appropriate. Excessively large or small gear mesh clearance can both lead to increased noise. It is necessary to check the meshing condition of the gearbox gears and adjust the meshing clearance. 5. The fastening bolts connecting the motor and the gearbox are loose, or the coupling is worn out. Loose fastening bolts or worn couplings can result in an insecure connection between the motor and the gearbox, causing noise during operation. It is recommended to check the tightness of the connecting components as well as the wear condition of the couplings; any issues found should be repaired or replaced. In short, it is recommended to check and rule out problems from the aspects mentioned above, identify the cause of the harsh whistling sound, and carry out the necessary repairs. If you are unable to resolve it on your own, it is recommended to contact a professional technician for inspection and repair. .
It is to be determined whether the problem arose during the initial testing or later on. In the case of a preliminary test run, experienced technicians are needed to determine whether it is normal. If it appears the day after, it is considered an abnormal noise and requires disassembly for inspection. A whistling sound from a transmission with a relatively high acceleration rate is considered normal; this is for reference only.