Problem of frequent damage to bearings in reducer gearboxes?
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My reducer has a lot of noise coming from the gearbox area; even after replacing the bearings, it wouldn’t operate properly for more than 24 hours before the bearings failed again. I had to replace the bearings six times in total, and ultimately I had no choice but to replace the entire reducer in order for it to work properly. Please analyze the reasons.
The parallelism and intersection of the two axes do not meet the specified requirements, and are not in accordance with the instructions. Too much load.
How is the gear meshing? Is the coupling coaxial? There are also lubrication issues.
The bearings in reducers are generally ball bearings, which mainly bear radial forces and can handle only a small amount of axial force. The frequent damage to your bearings is likely due to a large axial load acting on them; consider this reason along with the actual conditions of your reducer. I think the possibility of Zhou bending is relatively high
1. What is the condition of gear meshing? 2. What is the axial clearance of the bearing? Has the original poster checked or recorded these two points? As for the parallelism of the shaft, it generally has little to do with maintenance; the accuracy should be ensured during the manufacturing process of the gearbox.
1. The parallelism and intersection of the two axes do not meet the specified requirements. 2. Check to ensure that the replacement bearing is the same as the original one in terms of type, etc., as well as regarding the bearing’s precision and clearance; a larger clearance should be used at high speeds. 3. The shaft load is high; if possible, replace it with a bearing that provides thrust.
The bearings used in my shaft feature tapered roller bearings at the areas subject to axial forces, and ball bearings at the areas subject to radial forces; the bearings seem to be used correctly.
1. Are the bearing models identical? 2. Is the lubrication proper? Is the oil level sufficient? 3. Gear meshing – are the gears damaged? Generally, if the bearings have been damaged so many times, the gears are likely in similar condition as well. 4. The gearbox model is not suitable for the operating conditions. 5. Water or debris has entered the system. 6. The installation quality is inadequate. 7. There are issues with the alignment of the couplings
In my opinion, the situation described by LZ is due to quality issues in the gearbox manufacturing. The bearings have been replaced multiple times yet still failed; if it’s not the same product of poor quality, the issue can be ruled out as being related to the bearings ； Multiple occurrences can also rule out factors such as lubrication and maintenance. Possible reasons: 1. The deviation in the position of the bearing holes in the gearbox housing is significant, resulting in abnormal gear meshing and root cutting; this generates loud noises and can damage the bearings ； 2. The gears in the gearbox were not manufactured properly, resulting in abnormal gear meshing and root cutting; this caused loud noises and damaged the bearings ； 3. The drive shaft of the gearbox is not properly manufactured or becomes deformed for some reason, resulting in abnormal gear meshing and root cutting; this causes loud noises and damages the bearings ；
How is the performance of the reducer after it has been replaced? Is the oil temperature too high when the reducer is in operation after the bearings have been replaced?
The shaft hole is not aligned, and the gear mesh clearance has not been adjusted properly
Problems with gear meshing and installation coaxiality