Analysis of the reason for oil leakage of the reducer

Cause Analysis of Oil Leakage of Reducer
1. There is a pressure difference inside and outside the reducer: During the operation of the reducer, the friction and heat of the moving pair and the influence of the ambient temperature increase the temperature of the reducer. The higher the internal temperature, the greater the pressure difference with the outside world, and the lubricating oil leaks from the gap under the action of the pressure difference.
2. The structure design of the reducer is unreasonable
1) The inspection hole cover is too thin, and it is easy to deform after tightening the bolts, making the joint surface uneven, and oil leakage from the contact gap;
2) During the manufacturing process of the reducer, if the castings are not annealed or aged, and the internal stress is not eliminated, deformation will inevitably occur, resulting in gaps and leakage;
3) There is no oil return groove on the box, and the lubricating oil accumulates in the shaft seal, end cover, joint surface, etc., and leaks out from the gap under the action of the pressure difference;
4) The structural design of the shaft seal is unreasonable. The early reducers mostly used oil ditch and felt ring shaft seal structure. When assembling, the felt was compressed and deformed, and the joint surface gap was sealed. If the contact between the journal and the seal is not ideal, the seal will fail in a short time due to the extremely poor compensation performance of the felt. Although there are oil return holes on the oil ditch, they are easily blocked and the oil return function is difficult to exert.

3. Excessive amount of refueling: During the operation of the reducer, the oil pool is agitated very much, and the lubricating oil splashes everywhere in the machine. cause leakage.

4. Improper maintenance process: During equipment maintenance, oil leakage will also occur due to incomplete removal of dirt on the joint surface, improper selection of sealant, reverse installation of seals, and failure to replace seals in time.