When in use, there is a heavy oil pocket on the bearing bush sticker on the propeller side of the fan. This not only wastes heavy oil but also pollutes the equipment and the floor, and poses a threat to the safe operation of the fan. In order to solve the problem of the oil pocket, technicians have developed many methods, but the results are not ideal at the beginning. The positive pressure range of the support and the reservoir is on the treadmill side. The selected air blown between the housing of the centrifugal fan and the shaft casing into the storage chamber generates lubricating oil.

There are design defects in the housing between the treadmill frame and the water tank. Due to the long-term operation of the fan driver, the casing becomes loose, and the casing collides with the shaft. With excessive design adjustment, air cannot enter, and the lubrication of the casing leaks, which aggravates the leakage. Injecting glue into the shaft sleeve and the guide ring are effective ways to completely solve the leakage problem.

In order to solve the problems of the shaft system of the centrifugal fan, a negative pressure pump assembly injects oil into the inlet pipe of the fan and the oil pocket with a negative pressure plate, which solves the problems of the fan shaft system and soil pollution. The accumulation of oil and lubricating oil in the fan state causes pollution to the fan propeller and increases the consumption and refilling amount of the oil. However, due to the installation and modification of the exhaust joint and the corner joint, the problem of oil leakage has not been solved yet.

After a long period of observation, after entering the oil tank, a strong air current can be seen from the oil tank. Under atmospheric pressure, the lubricating oil sprays a strong air current towards the load plate. The oil tank is used for refilling oil. The air flows in an opposite parabolic shape. Under normal circumstances, the bearing rotates at a high speed, and the external part and the external illumination of the shaft inject air into the storage chamber. The closure of the storage seat and the labyrinth seal end cover easily exerts pressure on the cavity. The high pressure forces the compressed air to flow through the ring in the shaft, the camping shaft and the bearing between the propellers.

The shaft casing plays a role that fits the shaft and the illumination on the bearing ring and the air platform. After working for a long time, loosen the shaft and fix it with the adjusted screws. The analysis results show that in order to solve the looseness problem of the centrifugal fan, it is necessary to use a hard filler with an appropriate gap. In order to solve the problem of the oil pocket, it is necessary to use the pipeline from the blower to the oil tank. Therefore, it is recommended to use high-pressure adhesive in the gap between the housing and the shaft to solve the problem of pipeline leakage. We propose a method of changing the wind direction.