The reasons for oil leakage of (reducers) or gearboxes usually include the following points:
Seal failure is one of the common reasons. After long-term use, the seals will wear, age and deform, resulting in a decrease in sealing performance and thereby causing oil leakage.
Improper assembly may also cause oil leakage. During the installation process, if the seals are not installed properly, the torque of the fastening screws is not uniform, or the fit tolerance between the components is unreasonable, the sealing effect may be damaged, causing oil leakage.
After installing the reducer or gearbox, if the same-period nuts are not replaced or the same-period nuts are opened, the excessive pressure inside the box during operation will also cause oil leakage.
Excessive pressure generated during the operation of reducers or gearboxes can also lead to oil leakage. For example, if the vent hole is blocked, causing an imbalance of pressure inside and outside the box, oil may seep out from weak sealing points.
Improper selection of oil products is also relevant. Using inappropriate lubricating oil with substandard performances such as viscosity and antioxidant properties may cause the oil to deteriorate, the lubrication effect to deteriorate, increase component wear, thereby affecting the sealing performance and triggering oil leakage.
The material or manufacturing defects of the box may also be one of the reasons. For example, if the box has defects such as sand holes and cracks, or the quality of the box is poor during casting and processing, and the surface roughness does not meet the requirements, it may affect the sealing effect and cause oil leakage.
In addition, prolonged vibration and shock of the reducer or gearbox may loosen the seals or cause gaps at the mating surfaces of components, thereby resulting in oil leakage.