What are the faults caused by lubricating oil in planetary gearboxes

Nov 06, 2024 Leave a message

Firstly, poor lubrication of the gear pair causes wear on the tooth surface


Due to the harsh operating environment of the gearbox, the lubricating oil film is not easily formed and stably exists between the meshing surfaces, resulting in pitting corrosion or frictional wear, deformation, and other phenomena on the gear surface, bearing chamber, and gear shaft diameter surface, until serious wear of the gear surface is caused.


Secondly, excessive oil temperature can cause damage to components

 

 

During the operation of the gearbox, due to insufficient lubricating oil or equipment overload, the temperature of the lubricating oil inside the gearbox rises rapidly, causing local damage to the relevant components inside the gearbox. Some components may experience significant thermal deformation due to the failure to eliminate internal stress, resulting in a decrease in the accuracy of the gearbox. Some components may also suffer damage due to a decrease in material strength at high temperatures. In addition, some gearboxes that are not flexible in operation and suffer from severe power loss may get stuck when foreign objects invade during operation, resulting in uneven operation or abnormal vibration of the transmission components


Thirdly, environmental pollution caused by vibration and noise

 

 

After the gearbox is started, the machine may experience significant shaking due to gear and bearing wear or poor assembly of the transmission device. Due to factors such as bearing damage, gear wear, gear damage, or foreign object jamming, the machine may produce a loud and prolonged piercing sound. The occurrence of these faults will cause serious noise pollution.

 

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Fourth, the internal structure design of the reducer is not standardized

 

 

In the structure of the reducer, due to the design of the cover plate on the inspection hole being too thin, local deformation is prone to occur after tightening the screws, resulting in contact gaps and oil leakage. During the manufacturing process, the castings were not annealed and deformed, resulting in gaps and oil leakage. It may also be due to the lack of a designed oil return groove on the gearbox body. When excessive lubricating oil accumulates at the end cover and structural joint surface of the reducer body, the installation of the cycloidal pinwheel reducer causes the pressure difference to cause lubricating oil to leak outward from the joint gap.


Fifth, oil leakage from the casing causes environmental pollution


In the gearbox, oil leakage may occur due to factors such as oil seal damage, gasket damage, loose oil plug, or damaged oil gauge. It is also possible that excessive oil volume, high oil level, or multiple cold starts may cause bubbling of lubricating oil, resulting in a large amount of oil leakage at the vent plug and serious environmental pollution.