The structural design of the cause of the oil leakage of the reducer is unreasonable

The unreasonable structural design of the reducer will cause oil leakage:

(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 leaking from the touch gap.

(2) During the production process of the reducer, if the casting is not annealed or aged, and the internal stress is not eliminated, deformation and voids will occur, resulting in 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 effect of pressure difference.

(4) The structural design of the shaft seal is unreasonable.The early reducers mostly used oil ditch and felt ring type shaft seal structure. When assembling, the felt was compressed and deformed, and the gap of the joint surface 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 function of the felt.Although there are oil return holes on the oil ditch, they are easily blocked and the oil return effect is difficult to exert.