Usually a casing made of seamless steel roller, in order to save the cost of materials, reduce the cost, but also can be used to do but the weld seam steel tube shell, the demand is higher, so as not to scratch tape. There are also used PVC pipe, glass fiber reinforced plastic, rubber, ceramic tube shell, the latter is the advantage of corrosion resistance, no rust, small density, in addition to the carrying capacity of FRP than the steel pipe.
The supporting roller is used for supporting the conveyer belt and the material on the belt to ensure the stable operation of the conveyer belt. The following is the classification of roller and its functional profile:
Buffer roller: installed in the lower part of the conveyor, to reduce the impact of the conveyor belt to extend the service life of the conveyor belt.
Grooved roller: used to support the transport of bulk materials;
Parallel roller: a parallel upper roller is used for carrying and conveying articles;
Self-aligning roller: used to adjust the belt deviation, to prevent hunting, to ensure stable operation of conveyor belt;
Buffer roller: installed in the conveyor under the material section to reduce the impact of the conveyor belt to extend the service life of the conveyor belt.
Return roller: used to support the conveyor belt, there are parallel, V, anti V type;
Spiral roller: used to clear the conveyor belt sticky material, keep the surface clean.
The supporting roller bracket is provided with a groove shape bracket, a groove shaped centering bracket, a flat roller bracket and an upper and a lower horizontal roller centering support, which are suitable for different materials and different occasions.
Pay attention to the adjustment of the roller support in the use of the process, if the tape at no-load to the side of the deviation, it should be the deviation side of the roller bracket forward along the belt running direction of 1-2cm, or the other side of the roller frame (or frame) properly heightening. This can effectively prevent the phenomenon of tape. This will not cause leakage, abnormal wear and damage of equipment, reduce productivity, and will affect the normal work of the equipment to complete such trouble.
The three factors, such as the sealing performance of the roller, the life of the bearing and the life of the roller tube, affect the service life of the roller.
Roller sealing performance is the most important. After the water or dust into the bearing, the bearing grease will be eaten, the bearing can not be lubricated, life is reduced by several hundred times, will soon be ineffective, or by dust stuck, roller also immediately scrapped. Labyrinth type non contact seal is the most ideal sealing structure. If the water and dust slime never pollution, bearing the antioxidant lithium grease can guarantee 30 years without calcifications, bearing always work in good lubrication condition, in the premise of rotational resistance is less than or equal to 1N, the normal life should reach 150 thousand hours in the roller. In Jidong Cement mine belt conveyor, the actual use of some of the roller has been close to 20 years.
Roller resistance. The life of the bearing is the life of the roller, and the bearing life is closely related to the roller resistance. In order to ensure the bearing lubrication state, roller rotating resistance is less than or equal to 1N, bearing life up to 150 thousand hours; the rotation resistance is less than or equal to 2.5N - 3N roller bearing life is 50 thousand hours; the rotation resistance is less than or equal to 5N - 8N roller bearing, not life more than 10 thousand hours, and visible support resistance to rotation and life is very close. |
