How to repair the output shaft of XLD27-59-3KW cycloid pin wheel reducer if it is worn

The wear of the output shaft of the XLD27-59-3KW cycloid pin wheel reducer can be repaired as follows:

• Analyzing and determining the wear part : first remove the relevant components, such as removing the output shaft end cover, coupling, etc., take the output shaft out of the reducer, carefully check the wear of the output shaft, clarify whether it is the bearing position wear, keyway wear or other parts, measure the size and degree of wear, and provide a basis for subsequent maintenance.

• Bearing position wear maintenance

• Post-welding processing : If the wear is not too serious, the repair welding method can be used. First clean, remove oil and rust the wear parts, then repair welding with appropriate welding rods, and then turn, grind and other processing to restore the size of the bearing position to the specified accuracy, and the surface roughness must also meet the requirements.

• Brush plating or spraying : For situations where the wear amount is small, brush plating is a better method. It can coat a layer of metal on the worn surface to restore size and accuracy. Thermal spraying technology can also be used to spray metal or alloy powder onto the worn area and then grind and processed.

• Use repair agents : There are now some polymer composite repair agents specially used to repair metal wear. Apply them to the worn bearing position. After curing, they can achieve a certain strength and wear resistance, and restore the matching accuracy between the shaft and the bearing.

• Replace the shaft : If the wear is severe and the above method cannot be effectively repaired, or the shaft has other defects such as cracks, consider replacing a new output shaft. The new shaft material is generally 45# steel, and has been tempered and has a hardness of HB187-229. The dimensional accuracy and surface roughness should comply with relevant standards.

• Keyway wear repair

• Remachining the keyway : If the keyway is not worn seriously, you can remachining the keyway at the corresponding position of the original keyway, such as increasing the width of the keyway and making the corresponding keys, but be careful that the new keyway cannot interfere with the original keyway, and ensure that the strength of the shaft is not greatly affected.

• Welding repair keyways : For keyways with severe wear, you can first clean the worn keyways, then fill the keyways by welding, and then re-process the keyways to the specified size.

• Installation and debugging after repair

• Part cleaning : Clean the repaired output shaft and other disassembled parts to remove oil, impurities, etc., and ensure the surface of the parts is clean.

• Installation parts : Install in the opposite order of disassembly. During the installation process, pay attention to the installation position and direction of each part to ensure the installation is correct. When installing bearings, pay attention to the gap and lubrication of the bearings and apply grease appropriately. When installing seals, prevent the seal from being damaged and ensure the sealing effect.

• Correction coupling : After installing the output shaft, the coupling of the reducer must be rectified to ensure the coaxiality of the reducer shaft and the shaft of the driven device, and avoid additional loads due to different shafts, which affects the normal operation of the reducer.

• Refueling trial run : Add an appropriate amount of lubricating oil that meets the requirements and then conduct a trial run. During the trial operation, the operation of the reducer must be closely observed, including temperature, noise, vibration, etc., to check whether the output shaft rotates smoothly and whether there are any abnormal phenomena. If there is any abnormality, the machine should be shut down and checked in time, find out the cause and deal with it.