The rotary kiln is mainly composed of a cylinder, a transmission device, a supporting device, a wheel blocking device, sealing of kiln head and kiln tail,and a kiln head cover. The supporting device of the supporting rollers carries the weight of the whole kiln barrel, and plays a positioning role on the barrel, so that it can run safely and smoothly. The temperature rise of rotary kiln support rollers is a common phenomenon, and there are many causes.

Common causes of bearing bush temperature rise and treatment measures:

1. Temperature rise of roller bushing caused by lubricating oil

If the lubricating oil of the bearing wheel is not changed or maintained for a long time, it will cause the viscosity of the lubricating oil to decrease, the emulsification of the oil quality, and the dust impurities in the oil, etc., which can cause the bearing bush to heat up. Only by regularly replacing the new oil and strengthening the daily maintenance of the roller bearing can we effectively prevent the temperature rise of the roller which caused by the lubricant.

2, the temperature rise of the bearing bush caused by the oil leakage of the idler and the fall of the lubrication device

If the seal of the idler shaft is damaged, oil leakage will occur, the oil level will decrease, or the lubricating oil spoon will fall off, which will cause the bearing bush temperature to rise. Therefore, it is necessary to do the routine inspection of the roller seal, replace the seal ring in time, and tighten the lubrication spoon.

3, water circulation system failure

If the circulating water system is not cleaned for a long time, the pipeline will be blocked, causing the circulation water to flow improperly or in a small amount, which will cause the bearing shell to heat up. When the circulating water pipe inside the idler is aging and ruptured to produce water leakage, the viscosity of the lubricating oil is destroyed, the oil quality is deteriorated, and the temperature of the bearing shell rises. The treatment measures are: pickling the circulating water pipe, removing the internal oily impurities, and replacing the damaged internal water pipe.

4.The temperature rise of the bearing bush due to the small gap of the tile mouth

The idler bearing is used for a long time, and the contact angle between the bearing and the shaft will become larger and larger due to friction. At the same time, the contact gap between the bearing and the shaft will become smaller and smaller to a certain extent. Lubricant cannot enter the bottom of the bearing for lubrication. Causes bearing bush temperature rise. After finding that the gap of the tile opening is small, it should be repaired in time and the tile opening should be reopened. Generally, the gap of the tile opening is 0.003Dmm (D is the diameter of the supporting shaft).

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