Detailed explanation of how the sealing device of the output shaft of the BLEY4527-391-5.5KW cycloid pin wheel reducer prevents lubricant leakage

Oil seal seal : Usually a skeleton oil seal is used, and its cross-sectional shape is J-shaped. It uses the elasticity of the lip-shaped structural part and the clamping force of the coil spring coil to make the lip-shaped part close to the shaft surface. The sealing ring is equipped with a metal frame, which achieves axial fixation by the cooperation of the periphery and the hole. If it is mainly for oil sealing, the sealing lip should face the bearing, thereby preventing the lubricant from leaking out of the gap between the output shaft and the end cap.

Oil return tank design : A oil return tank tilted into the machine in the center of the lower tile of the bearing seat, and a notch is also made at the straight opening of the end cover, which faces the oil return tank. In this way, the excess lubricant that is thrown by the gear on the bearing will flow back to the oil tank in a certain direction through the notch and the oil return tank to avoid the accumulation of lubricant oil at the shaft seal, thereby reducing the possibility of leakage.

Sealant auxiliary : At the joint surfaces of the reducer's end cover and the box, sealant, such as D05 silicone rubber sealant, are usually applied to fill the tiny gaps in the joint surface, enhance the sealing effect, and prevent lubricating oil from seeping out of these parts.

Balanced pressure of ventilation holes : A vent hole is provided on the reducer, which is used to balance the pressure inside and outside the machine. If there are no breathable holes or the breathable holes are blocked, the internal temperature rises when the reducer is running and the pressure gradually increases, and the lubricating oil is prone to leak out of the gap under the action of pressure difference. Through the ventilation hole, the internal pressure can be balanced with the external pressure, reducing the chance of oil leakage.