Introduce the sealing structure of DCY280-71-V-N-BSP hard tooth surface gear reducer

1、 Core dynamic sealing structure at the shaft end

Adopting a double-layer double lip skeleton oil seal as the main sealing component, the inner single lip oil seal blocks the overflow of lubricating oil inside the box, and the outer double lip oil seal isolates the intrusion of mineral powder and mud water.

Two step wear-resistant shaft sleeves are installed at the shaft end to prevent direct wear of the shaft neck by the oil seal lip. After wear, the shaft sleeve can be replaced separately without the need for overall repair of the shaft body.

The end cover is equipped with a high-level oil return groove in the oil return channel, and the leaked lubricating oil can be guided back to the box through centrifugal force, greatly reducing the probability of leakage.

Partial operating conditions have been upgraded to a combination of labyrinth and oil seal sealing. The non-contact labyrinth structure first blocks large particle impurities, and then the oil seal completes the final sealing, suitable for high-speed continuous operation scenarios.

2、 Box static sealing system

The box body adopts HT300 gray cast iron split structure, and the split surface is precision milled and matched with sealant to achieve leak free bonding.

All end caps, inspection hole cover plates, and oil label joint surfaces are equipped with oil resistant paper sealing gaskets. Purple copper sealing gaskets are installed at the oil drain plug to prevent leakage from the static joint surface.

Install an oil sealing ring on the inner side of the bearing chamber to limit the influx of lubricating oil into the bearing chamber and prevent the dilution and failure of lubricating grease.

3、 Special adapted sealing details

The BSP label of this model corresponds to a pressure balanced seal with a vent. A vent is installed on the top of the box cover to balance the internal and external pressure differences caused by temperature rise during operation, avoiding leakage of the oil seal lip caused by pressure differences.

The sealing element is standard equipped with NBR nitrile rubber material, which can be upgraded to FKM fluororubber, which is suitable for -30 ℃~200 ℃ wide temperature working conditions, and its oil resistance and aging resistance are greatly improved.

For the scenario of 24-hour continuous operation of belt conveyors, multiple seals form redundant protection, which can effectively reduce over 90% of shaft end oil leakage faults.