Type and Function of Fixed Belt Conveyor Roller

Roller is used to support the conveyor belt and carry of the material, to ensure the stability of theconveyor belt.
In general, the fixed belt conveyor roller is the following:
1.Trough roller: it is also known as carrying roller which is used for carrying bulk material;
2.Parallel roller: parallel upper roller is used for carrying materials, parallel lower roller is to support the return branch of the conveyor belt;
3.Self-aligning roller: it includes taper aligning supporting roller and friction aligning roller which are mainly used for adjusting the belt deviation to avoid S-shaped, so as to ensure the stable operation of conveyor belt;
4.Impact roller: it is installed in the lower part of the conveyor belt, which can reduce the impact of the conveyor belt to extend the service life of the conveyor belt;
5.Return roller: it supports the conveyor belt of lower branch,including parallel type, V type, inverse V type,etc. V and inverse V type roller can reduce the conveying belt deviation possibilities;
6.Transition roller: it is installed between the drum and the first set of roller, which makes the conveying belt gradually turns from through shape into or flat shape and reduce additional stress of the conveying band edge turns to trough shape due to the expansion, at the same time,it can prevent the material spreading phenomenon of conveyor belt.
In addition, the comb type roller and screw roller, which can remove the sticky material on conveyor belt to keep the conveyor belt clean. 

Difference between Tapered self-aligning roller and Friction self-aligning roller

Tapered self-aligning roller is similar with Friction self-aligning roller in structure which are mentioned when introduce the belt conveyor, their purpose is protecting belt and preventing belt deviation. However, in the process of actual use, there is a big difference between them.
The main difference:

1.Stability performance: these two kinds of roller have their own advantages and disadvantages. Tapered self-aligning roller provides a more stable transport environment for belt and material, but since the tapered roller with a certain angle, if carries the material for a long time, it will increase the radial offset of roller. While friction self-aligning roller has a stable structure so that it can carry material for a long time and won’t be influenced. but there is a certain angle between belt and roller due to design of friction pulley, the joint degree of friction self-aligning roller is lower than tapered self-aligning roller, which will reduce the stability performance of belt conveyor.
2.Friction coefficient: concerning this aspect, tapered self-aligning roller has advantage over the friction self-aligning roller, tapered self-aligning roller has a special body design of roller, it could extremely increase joint degree of belt and roller to make the belt adapt to tapered roller, it also greatly reduce the force of friction.

3.Sealing Performance: the sealing performance of friction self-aligning roller is better than tapered self-aligning roller, the friction one adopts the design with independent installation of the friction pulley to promise a good sealing performance, however, because tapered self-aligning roller has a different diameter of pipe, it increase the difficulty of seal, meanwhile, performance of seal is also reduced.
4.Production cost: the structure and technology of tapered self-aligning roller are much simpler, so the cost is low, but if in the long run of using, the friction self-aligning roller is more stable and durable.

Eight Factors will Affect the Quality of Conveyor Roller

Conveyor roller is widely used in various types of industries, however, most customers lack of the knowledge for choosing the suitable conveyor roller. Let’s show you what are the factors that affecting the quality of roller.

 

1. Roller radial runout (the index directly affects the stability of the conveying materials)
2. Flexibility (the index affects the life-span of the roller and belt, as well as the driving power of the machine)
3. Dust resistance performance(the index affects the life-span of roller)
4. Shock resistance performance (the index affects the life-span of roller)
5. Rotational resistance (the index affects the life-span of tape)
6. Axial carrying capacity (the index affects the life-span of roller)
7. Water resistance performance(the index affects the life-span of roller)
8. Axial string momentum (the index affects the life-span of roller directly)

Do You Know What are the Main Technical Requirements of Conveyor Roller

1.Conveyor roller cylindrical radial circular runout
In order to guarantee the belt conveyor run smoothly, it is necessary to make strict specifications on roller radial circular runout, otherwise it will cause conveyor belt vibration, increase conveyor belt running resistance and consume more power due to its higher value. Therefore, this is an important technology index for roller.

 

2.Rotational resistance after installation of conveyor roller
Excessive roller rotational resistance will cause conveyor roller damage in advance and conveyor belt wears rapidly, it will also cause the increasing of the driving power, so this is another important technical index for roller.
3.Waterproof, dustproof, sealing performance of conveyor roller
The service life of roller depends on its sealing performance to a great extent, good seal performance can prevent dirt and moisture entering into roller bearing roller way effectively. In order to improve its service life, we must develop better way of waterproof, dustproof, sealing performance.

 

4.Roller axial carrying capacity
Generally, roller bears the roll force for only one direction, therefore, we must ensure normal operation under axial load of roller.
5. Service life of conveyor roller
This is a comprehensive index which involving the scientific rationality of structure design, the manufacturing quality of roller, bearing selection, the choice of grease and grease filling and sealing effect etc.