To determine whether the dual-stage NGW121 planetary gear reducer needs repair or replacement, you can start from the following aspects:
Appearance inspection : Check whether the reducer shell is cracked, deformed or damaged. If these conditions exist, it may affect the stability of its internal structure and requires repair or replacement. Check whether the connection parts, such as bolts, nuts, etc. are loose. Loose connections may cause vibration and abnormal noise during operation. They need to be tightened in time. If the connecting parts are damaged, they need to be replaced. In addition, it is necessary to observe whether there is any oil leakage. If lubricating oil leaks in the oil seal, end cap, etc., it may be that the seal is aging or damaged, and the seal needs to be replaced.
Sound judgment : The sound of the reducer in normal operation is stable. If there is a harsh, sharp, impactful or irregular sound during operation, it may be caused by gear wear, poor meshing, bearing damage, etc. It is necessary to further check the internal components and determine whether to repair or replace according to the degree of damage.
Temperature detection : Touch with your hands or use a thermometer to measure the temperature of the reducer shell. If the temperature exceeds the ambient temperature above 40℃, or the local heat is obvious, it may be caused by insufficient lubrication, overload operation, wear of bearings or gears, poor heat dissipation, etc. The cause needs to be checked and corresponding measures are taken, such as replenishing lubricant, checking the load, replacing worn parts, etc. If the problem is serious, the reducer may need to be replaced.
Vibration monitoring : The vibration of the reducer can be measured by the feel of the hand or by using a vibration detector. If the vibration amplitude is significantly increased or the vibration frequency is abnormal, it may be caused by bearing wear, gear imbalance, improper installation, etc., and relevant components need to be inspected and repaired or replaced.
Performance indicator inspection : Check whether the output speed and torque of the reducer meet the requirements. If the output speed is unstable or the torque is obviously insufficient, it may be damaged by internal gears, bearings and other components, resulting in reduced transmission efficiency and need to be repaired or replaced. At the same time, observe whether the operating efficiency of the reducer has decreased. If it is found that the energy consumption increases but the output power does not increase accordingly, it may also be an internal fault and further inspection is required.
Interior parts inspection : Disassemble the reducer regularly to check whether the gear has broken teeth, cracks, peeling, severe wear and other phenomena. If the gear is seriously damaged, the gear needs to be replaced. Check whether the clearance of the bearing is increased, whether the raceway is worn or pitted, whether the cage is broken, etc. If the bearing is damaged, it should be replaced in time. In addition, it is necessary to check whether the ellipticity, taper and mating size of the shaft exceed the difference. If the shaft wears or deformation exceeds the allowable range, it needs to be repaired or replaced.
