Causes of oil leakage in small crane reducer

Reasons for oil leakage from small crane reducer: First, the reducer inside and outside the production of a large pressure difference: reducer operation rotation process, movement friction heat and affected by the external environment temperature, so that the temperature rise of the reducer is too high, if there is no breathable hole, such as air, then the pressure of the crane gradually increased, the temperature in the machine will be higher, hanging crane and the outside pressure difference
 
The lubricating oil leaks out of the gap under the action of pressure difference.
 
Second, the cause of oil leakage of the speed reducer structure design is unreasonable. 1) Check the hole cover plate is too thin, tight bolts easy to produce deformation, from the contact Gap oil leakage, 2) deceleration mechanism production process, the castings did not carry out aging treatment or annealing, did not eliminate the internal stress, will inevitably occur deformation, resulting in clearance, resulting in leakage; 3) The box is not designed back to the oil tank Light and small crane to reduce the bonding surface, under the action of pressure difference, from the gap to leak out; 4) The Shaft seal structure design is unreasonable. The early reducer mostly used oil ditch, felt coil shaft seal structure, when assembling, the felt compression deformation, and the joint surface gap sealed up. If the shaft neck and seal contact is not very ideal, because the compensation performance of the felt is very poor, the seal in a short period of time is the failure.
 
Although there is a return oil hole on the oil ditch, but easy to clog, the effect of oil return is difficult to play. Third, too much refueling: the reducer in the process of operation, the oil pool is stirred very badly, lubricating oil in the machine everywhere splash, if the amount of refueling over.