What Factors Lead to Inflexible Rotation of Conveyor Roller

In our daily use of conveyor roller, inflexible rotation phenomenon may occur during the operation, what factors lead to inflexible rotation of conveyor roller? Let’s see the following two parts:
The manufacturing quality of belt conveyor idlers
The manufacturing problems of belt conveyor mainly are bearing lacks of rigidity, difficult to ensure the roller assembly accuracy , which restricts the operation flexibility.
Sealing, lubrication and maintenance
Because of belt conveyor working environment is relatively poor, generally, operation site is full of dust, and the bearing sealing form has big influence on roller operation flexibility. If sealing poor, dirt can easily enter into the bearing inner which causes inflexible rotation; in addition, if bearing grease adopts common calcium base grease ,it is easy to change color and become dry, can't reach a very good lubrication effect.

 

How to choose the suitable vibration motor for the vibration machine?

Vibration motor has many types and models with a wide application,it is usually applied with the feeder, vibrating screen combination. The vibration motor is very important in the vibration machine. It directly determines the working efficiency of the vibration machine.The vibration mechanical vibration motor selection steps are as follows:
A.According to the operating requirements, confirm the required vibration of the frequency (r/min) and the amplitude Ym (mm).
Such as the six vibration motor (n=960r /min) can drive the vibration chute, vibration feeder, vibration mill, vibrating screen etc.
B.According to the structure of the vibration machine itself, get the vibration weight G (kg) and calculate the required vibration force Fm (N) .
C.According to the vibration of the operation to get Fm, you can get the model of the vibration motor, please pay attention to the exciting force FH is larger than Fm.
D.Design the overall structure, and calculate the actual vibration parameters, after the calculation, if the vibration motor is too large or too small, motor model should be re-selected.
E.Design of vibration isolation system. 

Deliver Conveyor Rainproof Cover to Madagascar

Last week, more than 600 pieces conveyor rainproof cover used for belt conveyor was delivered from Shanghai Port. These goods were ordered by our Madagascar customer, and they will be transported to the Toamasina port as anticipated one month.

 

According to the information offered by our customer, we provided three kinds of conveyor rainproof cover to them. One is matched with 800mm belt width conveyor, another is matched with 1000mm belt width, and the last one is matched with 1400mm belt width. Meanwhile, the quantities of conveyor rainproof conveyor are 490 pieces, 110 pieces, 40 pieces respectively. Also, they have the same thickness that is 0.8mm.

 

Conveyor rainproof cover is the important component in belt conveyor. It can not only protect materials, but also protect the belt conveyor. PK Machinery can provide conveyor rainproof cover with high quality. Welcome to your enquiry at any time! 

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.

Features and functions of the special conveyor belt

With the rapid development of the financial, conveyor belt becomes more and more diversified, according to the technical comparison and different customer's requirements, please see the following opinions:

Acid and alkali resistant belt selects the cotton canvas, nylon canvas or polyester canvas as its core, belt body has a good elasticity and small elongation, it is easy to form a groove type. use. Selection of acid and alkali resistant materials polishing cover made of rubber, with good function of resistance to chemical erosion and good physical function. Used in contact with acid and alkali environment,such as phosphate fertilizer manufacturing, baysalt seawater. Acid and alkali resistant belt (acid and alkali resistant belt) rubber covering reference rubber plastic blending is adding alkaline material, excellent personality than neoprene acid-base belt resistance to acid and alkali resistant function better. Drum material referenced polyester canvas, more reliable than cotton canvas with acid core functions, easily made into a ring. And the ring-shaped belt is produced the ring belts process belts without joints, its core strength can reach the belt body of the joint office 90%, no significant joint belt surface faults, so belt moving flat with small elongation. Core references made of high quality cotton or cotton canvas.

Do you know the function of scraper on the belt conveyor?

Most belt conveyors has scraper on it,that is a very important part for belt conveyor, without it, the conveyor can not work smoothly.

Conveyor belt is the most commonly used material handling equipment, which is widely used in chemical, coal, iron & steel, metallurgy, mining industries, port, thermal power plant, etc. However, for conveyor belt which runs in the open air without cover hood, water scraper is a necessary accessory which is used to get rid of the stagnant water on the belt. 

Water scraper mainly consists of support & frame, idler sets, axle, bearing block, connecting rod, crank, electric-hydraulic pusher, etc. The operation precondition of water scraper is conveyor belt non-loading running. In the operation, press roller, trough carrier idler, flat carrier idler, connecting rod and crank are workings as a rotary body, the electric-hydraulic pusher drives the press roller and trough carrier idlers in clockwise rotation, then the top of trough carrier idlers and flat carrier idlers are on the same tangent plane. Under the clamping pressure of press roller and carrier idlers, the belt is lifted up, and the water is discharged from both sides of the conveyor belt. Thus the shift between normal operation and water removal can be achieved through the rotation of rotary body. When the conveyor belt is in normal operation, the trough carrier idlers of water scraper are used as the part of conveyor belt, so the belt can passes through the water scraper smoothly.This kind of water scraper has simple and reliable structure, which can avoid the belt damage. And it has the features such as safe and reliable operation, long service life, easy installation and convenient maintenance. 

From now on, you may have a good learn about the water scraper, and many more knowledge in www.pkmachinery.com, please check.