SEW reducer maintenance involves many aspects. The following are some common repair contents and steps:
Troubleshooting
Appearance inspection: Check whether the reducer shell has cracks, deformation or damage, whether the bolts at each connection are loose, whether there is oil leakage at the oil seal, and whether there is a blockage in the heat sink.
Sound check: Listen for abnormal noise or vibration while the reducer is running. For example, wear of gears can cause periodic sharp noise, and damage to bearings can cause irregular hum or vibration.
Temperature check: After running for a period of time, use a thermometer to measure the housing temperature of the reducer. If the temperature is too high, it may be caused by poor lubrication, excessive load, poor heat dissipation, etc.
Transmission accuracy check: Check the coaxiality and perpendicularity of the output shaft of the reducer and the input shaft, as well as the radial and axial jump of the output shaft, and determine whether there is any installation error or reduction in transmission accuracy caused by damage to internal components.
Common fault repair
Gear wear repair
Cause: Long-term use, excessive load, poor lubrication, gear quality problems, etc. may all lead to gear wear.
Maintenance method: For slightly worn gears, the tooth surface can be repaired by grinding, polishing, etc. to restore its accuracy and finish. If the wear is severe, a new gear is usually required. When replacing gears, make sure that the model and specifications of the new gear are exactly the same as those of the original gear, and install them strictly in accordance with the installation requirements to ensure the meshing accuracy of the gears.
Bearing damage repair
Cause: Bearing damage is usually caused by insufficient lubrication, overload, improper installation, fatigue and wear.
Maintenance method: First, determine the damaged bearing model, then disassemble the reducer and remove the damaged bearing. During the disassembly, be careful to avoid damaging the shaft and bearing seat. When installing new bearings, special installation tools are required to ensure that the bearings are installed in place and that the clearance of the bearings meets the requirements. At the same time, the bearing seat should be inspected. If there is wear or deformation, it needs to be repaired or replaced.
Oil seal oil leakage repair
Causes: Aging, damage, wear of the shaft journal, uneven seal surface, as well as excessive oil level and too high oil temperature, etc., may cause oil leakage of the oil seal.
Maintenance method: If the oil seal is aging or damaged, replace it with a new oil seal directly. When installing an oil seal, pay attention to the direction and installation position of the oil seal to ensure that the oil seal is closely coordinated with the shaft journal. If the journal is worn, the journal can be repaired by hard chromium plating, spraying wear-resistant coating, etc., so that its diameter can be restored to the standard size. At the same time, check whether the sealing surface is flat. If there are defects, grinding or replacing relevant parts. In addition, check whether the oil level and oil temperature are normal, and adjust it in time if there are any abnormalities.
Reducer water inlet maintenance
Reason: Usually, the reducer shell is not tightly sealed, and in harsh environments, such as humid and watery workplaces, moisture can easily enter the reducer inside.
Maintenance method: First, all the oil in the reducer must be discharged and the interior must be rinsed with clean oil or solvent to remove moisture and impurities. Then conduct a comprehensive inspection of the reducer, focusing on the seal. If the seal is found to be damaged or aging, it should be replaced in time. For gears, bearings and other components that have been soaked in water, they must be dried and checked for rust, corrosion, etc., and repair or replace if necessary. Finally, re-add the lubricant that meets the requirements.
