Belt Conveyor is the best efficient continuous transportation equipment for coal mine, compared with other transport equipment (such as locomotives), it has the advantages of long transport distance, large transport capacity and continuous transportation. And it is reliable, easy to automate and centralize control. Especially for high-yielding and efficient mine, belt conveyor has become the coal mining mechanical and electrical integration technology and equipment key equipment. Nowadays, the domestic belt conveyor goes into a high-speed development stage, with a huge demand. In some areas belt conveyors have gradually begun to replace locomotives and motor transport. Nowadays belt conveyor in China goes into a high-speed development stage, the market demand large.
Roller seal bearing load When selecting grease, select a small penetration grease for heavy loads. When working under high pressure, in addition to the small penetration, but also have a higher oil film strength and extreme pressure performance. When the grease is selected according to environmental conditions, the calcium-based grease is not easily soluble in water, and is suitable for drying and less water environments.

The service life of the idler roller depends mainly on the performance of the bearing and the seal. If the idler roller has a good bearing and sealing performance, the service life of the idler roller will be greatly extended. The test results show that the frictional resistance of the bearing accounts for about 1/4~1/8 of the rotation resistance of the idler. So choosing a good grease is very important to reduce the resistance of the roller bearing.

Improper selection of grease can cause bearing damage, resulting in damage to the idler. The MT821-2006 coal industry standard clearly requires the selection of 3# lithium grease, and each manufacturer must comply with the implementation. Otherwise, the roller will be damaged after a few hours of operation. The emphasis here is that for roller bearings in operating environments at -25°C, special models of low-temperature aviation grease must be selected.