What is the reason for the oil leakage in the structure of the Feibao brand gearbox?

1. Pressure difference generated inside and outside the reducer

During the operation of the gearbox, the friction and heating of the moving pair, as well as the influence of environmental temperature, cause the temperature of the gearbox to increase. If there are no ventilation holes or the ventilation holes are blocked, the pressure inside the gearbox gradually increases. The higher the temperature inside the gearbox, the greater the pressure difference with the outside world. Under the pressure difference, lubricating oil leaks out from the gap.

2. Unreasonable structural design of the reducer

1) The inspection hole cover plate is too thin, and after tightening the bolts, it is prone to deformation, causing uneven joint surfaces and oil leakage from the contact gaps;

2) During the manufacturing process of the gearbox, if the castings are not annealed or aged, and internal stresses are not eliminated, deformation will inevitably occur, resulting in gaps and leakage;

3) There is no oil return groove on the box, and lubricating oil accumulates in the shaft seal, end cover, joint surface, etc. Under the pressure difference, it leaks outward from the gap;

4) The design of the shaft seal structure is unreasonable. Early reducers often used oil groove and felt ring type shaft seal structures, which caused deformation of the felt during assembly and sealed the gaps on the joint surface. If the contact between the shaft neck and the seal is not ideal, due to the poor compensation performance of the felt, the seal will fail in a short period of time. Although there are oil return holes on the oil ditch, they are easily blocked and the oil return effect is difficult to exert.

3. Excessive fuel consumption

During the operation of the gearbox, the oil pool is stirred violently, and lubricating oil splashes everywhere inside the machine. If too much oil is added, a large amount of lubricating oil will accumulate in the shaft seal, joint surface, etc., leading to leakage.

4. Improper maintenance process

During equipment maintenance, oil leakage can also occur due to incomplete removal of dirt on the joint surface, improper selection of sealant, reverse installation of sealing components, and failure to replace sealing components in a timely manner.

Keyword: Feibao brand gearbox

Article source: http://www.fabmoda.cc/