The role of Shanxi roller and the evaluation criteria of quality
Rollers are important components of belt conveyors, with many types and large quantities. It accounts for 35% of the total cost of a belt conveyor and withstands more than 70% of the resistance, so the quality of the rollers is particularly important.
The role of the rollers is to support the conveyor belt and material weight. The roller must be flexible and reliable. Reducing the friction between the conveyor belt and the idler roller plays a key role in the life of the conveyor belt, which accounts for more than 25% of the total cost of the conveyor. Although the idler is a small part in the belt conveyor and the structure is not complicated, it is not easy to manufacture a high quality roller.
The criteria for judging the quality of the roller are as follows: the radial runout of the idler; the flexibility of the idler; the axial turbulence.
The effect of the radial runout of the idler on the belt conveyor:
In the range of the amount of runout specified by the state, the tape conveyor can be kept running smoothly, otherwise the tape conveyor belt will vibrate together, causing material to be thrown and polluted, and the higher the belt speed, the smaller the radial runout. benefit. The national standard specified in China is 0.7 mm, and the amount specified by the Japanese JIS standard is 0.5 mm.
The influence of roller flexibility on the belt conveyor:
During the operation of the belt conveyor, the flexibility of the roller is very important. If the flexibility of the roller is not good and the coefficient of rotation resistance is high, the entire belt conveyor system has to pay more power and consume more. Electricity can sometimes cause tearing of the tape, burning of the motor, and fires in more serious cases. Therefore, the selection of the roller with low rotational resistance coefficient (preferably less than 0.020) is an important part of the design and selection of the tape conveyor.
The effect of axial turbulence on the belt conveyor:
At present, China's tape conveyor manufacturing technology is more and more advanced, but the axis tilt is still a topic that needs to be studied. Because of the current tape manufacturing technology in China, the tape conveyor installation technology is still far from the advanced countries in the world. There is often a case where the tape is deflected. If the axial amount of the idler is large, the roller will be damaged earlier. Generally, the axial yaw amount is preferably controlled within 0.5-0.7 mm.
There are five criteria for judging whether the roller is good or bad:
1. Roller dustproof performance
2. Roller waterproof performance
3. Roller axial load bearing performance
4. Roller impact resistance
5. Roller service life The idler roller is an important part of the belt conveyor, with many types and large quantities. It accounts for 35% of the total cost of a belt conveyor and withstands more than 70% of the resistance, so the quality of the rollers is particularly important.
In Shanxi Chengyou Industrial and Mining Co., Ltd.: ordinary (EP, NN, CC) flame retardant (PVC, PVG) rib conveyor belt, special conveyor belt (high temperature, heat, acid and alkali resistance, etc.) wire rope conveyor belt, Maxima Roller, roller set, tapered centering roller, high life roller, telescopic fixed belt conveyor, coal feeder, vibrating screen, etc., contact telephone manager Jia QQ
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