Why vibration sieve screen mesh damaged so fast?

Why vibration sieve screen mesh damaged so fast? Factors that quicken vibration sieve screen mesh damage are like screen mesh quality, screen mesh tensioning force, material feeding problems etc.In numerous factors,screen mesh quality is the key factors that aroused screen mesh damaged fast.Here we will introduce the each factor as follows.

vibrating screen mesh

Factors:
1.Screen mesh quality is an important factor that aroused screen mesh damaged fast. If the screen mesh material can’t meet with the requirement of the material sieve, then the screen mesh will damaged soon.
2.Screen mesh don’t have enough tension that caused the screen vibrate, in this case the screen mesh usually damaged or broken along the edging.
3.Generally speaking, screen mesh has an upper and a lower force layer, which request that the two layers contact closely. If the screen mesh pre-tensioning is poor, when the lower force layer is tension but the screen layer isn’t tension, then when the vibration sieve working the vibrating distance of the screen mesh is too long, can’t effective compress with the screen frame contact section, these is also one reason that aroused screen mesh damaged so fast.

screen mesh

4.Material feeding problem As we should keep feeding during the vibration sieve work process, if feeding too much one time will block the material normal movement on the screen plate, which not only easily make the screen mesh become loose but also will greatly reduce the capacity of the material. Feeding material too much one time will make the unbalanced motor loading suddenly increased, which not only easily damaged screen mesh but also easily caused the vibration motor damaged, so when we feeding material must feeding uniformity. If the feeding way has strong impact, the vibration sieve must equip with impact hopper. If the material impact the screen mesh will consume exciting force generated by the vibration source, which more likely to cause screen mesh damage and screen mesh fatigue.

screen mesh

Solutions:

1.When you choose the vibration sieve you should choose the quality reliable screen mesh

2.Check the tensioning force of the screen mesh usually

3.Check whether the screen mesh squeezing ramming or not

4.If you sieve liquid with strong impact, you’d better equip hopper or buffer.

5.If there is accumulation of material, you should find out the reason as soon as possible such as adjust the eccentric of vibration motor

Further more information,welcome to click the link:www.pkmachinery.com

Factors should be Considered when Purchase a Vibrating Screen

First, the physical properties of the material to be sieved
Including material particle size, shape, moisture content, bulk density, and other material properties. When the particle size is very small, mesh is small, usually screening rate is very low, the same amount of processing need to use a larger model; when large humidity of materials, screening efficiency will be reduced, but the larger mesh size, moisture the impact is smaller; when the material is corrosive, usually made of stainless steel or stainless steel material contact parts.
Second, the nature and structure of the screen surface
If materials do vertical movement on the screen surface, it will have high screening rate and large capacity. For certain material, production rate and screening rate of vibrating screen are determined by mesh size. In general, wide screen surface has high production rate and long screen surface has high screening rate. What’s more, the larger the effective screening area is, the higher the screening rate is.

circular vibrating screen

Third, the production conditions
When a large load screening machine, the low screening efficiency. Feeding uniformity of screening process significant, so try to achieve uniform feed (In this regard, our company specializes in plane rotary sieve inlet Added sub-feeder, can achieve uniform feed).
Only taking the above influence factors into consideration can users purchase the most economical and appropriate vibrating screen.More information, please visit www.pkmachinery.com

rotary vibrating screen

Henan Pingyuan Mining Machinery Co. Ltd is the most professional manufacturer of Belt conveyor, and Vibrating screen, Bucket elevator, Screw conveyor, Scraper conveyor using the world's most advanced technology, we are willing to serve every company to meet your custom needs. our goal is "be the future global leader of mining machinery industry". have any questions, please contact us without any hesitation. 

      Tel: +86 373 579 9198

      Fax: +86 373 507 1699  

      info@pkmachinery.com  

    Address: 289 Yellow River Road, Xinxiang City, Henan Province, China

How to Analysis the Troubleshooting of Linear Vibrating Screen Plate?

Linear vibrating screen is a kind of vibrating screen. The linear vibrating screen can use exciting force generated by the vibration motor to realize the material accurate screening. At the same time its trajectory is linear, and has the advantages of simple structure, easy maintenance, high output and low energy consumption, which makes it is ideal for the assembly working line. 

Linear Vibrating Screen

Screen plate is an important part in the linear vibrating screen, which directly affect the quality of the linear vibrating screen effect.
How to improve the life of the linear vibrating screen plate has become the key to reduce the failure rate of linear vibrating screen. Currently linear vibrating screen ribbed slabs are easily broken, and polyurethane material is easily worn. The main reason is that the screen plate joints place lack of no support beams, screen plate mounted directly on a straight beam, screen plate and vibrator are synchronized, which keeps linear vibrating screen ribbed slabs long time in the floating state movement, then the linear vibrating screen ribbed slabs are easily to broken. After the upper sieve broken, it will produce some > 30mm substandard ore, after the lower screen broken, the effusion pool will piled ore quickly, causing the whole scrubbing process have to stop, only after cleaning all the effusion pool can reproduction. Screen plate installed directly in the beam, which also caused polyurethane and steel directly contact. During the operation of linear vibrating screen polyurethane material easily worn, which will affect screen plate life.

Vibrating Plate

Then we can use welding plate to support beam in the place of the screen joints, at the same time we can also add impact belt, and make the width of the belt is consistent with the beam width. By doing this we can reduce the wear and breakage of the screen plate during operation.

Reasons and Solutions of Quick Breakage of Vibrating Screen Cloth,You Know?

Main reasons:

a. Quality is a important factor which causes quick breakage of screen cloth. If the material of screen cloth cannot meet the requirements of screening, screen cloth may be damaged quickly. We will list the classification of screen cloth and suggest ways to select appropriate screen when our customers are choosing vibrating screen.

b. Tension strength of screen cloth is not enough which cause the chatter of screen and the damage or breakage in layering point or screen edge. 

c. There are upper screening layer and lower stress layer, and the two layers should be fit closely. If the tension technology of screen cloth is poor, and the stress layer is tightened while screening layer not, the distance of screen vibrating is too long, and the contact segment between screen cloth and frame cannot be tightened efficiently. It is also one of the reasons of quick breakage of screen cloth.

d. Material feeding problem. As the continuous feeding in operation of vibrating screen, if feeding too much at a time, materials’ motion may causes loose of screen cloth and reduce the capacity of the machine. 

 

vibrating screen cloth

Solutions:
a. Select the screen cloth with reliable quality. 

b. Check the tension strength of screen cloth regularly.

c. Check the compaction of screen cloth.

d. If screening liquid, it is better to install a bucket or buffer.

e. If there is Material accumulation, find out the reasons as soon as possible.
Further more information, welcome to contact us via info@pkmachinery.com or http://www.pkmachinery.com
 

bouncing ball

How to Deal With the General Common Faults of Gyratory Screen?

If Screen body running abnormally such as Sieve unusual sports such as torsional oscillation occurs etc, mainly due to eccentric rotors installed improperly result in main axle bend or bearing damage. For these reasons, you can make the appropriate adjustments.

If mixing occurs, the mainly reason may be screen damaged or screen body seal is lax, Solutions is to replace the screen cloth or fill holes, check the seal strip.

If the output can’t meet the requirement, mainly reasons are multiple: such as the material moisture is too high, mesh blockage, mesh size does not meet the requirements, the belt speed ratio is too low or belt occurs slip, lack of feed rate, bouncing balls serious wear and tear. Solutions is to reduce material moisture, replace screen cloth or change the screen clear network system, check the pulley and adjust the belt tension, increase feed rate, replacing the bouncing ball.

     
When support frame fracture happens, mainly due to the support frame has usage cycle, long-term implants uniform or long-term bearing torsional stresses make itself flexibility failure, then result in fracture. Therefore, in the routine maintenance, you should pay more attention to the condition of the support frame, checked found and replaced promptly, if possible, you’d better replace all the support plate at the same time, and try to make every support plate force uniform, so as to make it consistent with the amplitude .

Should You Adjust The Excitation Force of Vibration Feeder?

When customers purchase feeder motor, because of the pre-supplied parameters and reality production material particle size, amount per hour occurs an error, so the customer can change the motor exciting force own according to the following description, making the process variation change.But is it necessary to adjust?
Each brought in shaft vibration motor eccentric block has a fixed and an adjustable eccentric, users can adjust the excitation force according to change the adjustable and fixed eccentric eccentric angle.You can see table 1.The different excitation force when angle different,you can see the table 2.

Table1:

Table 2:

Adjustable eccentric block rotation angle	0°	60°	90°	120°
excited force	F	0.866F	0.707F	0.5F

When adjusting the vibration motor excitation force, please disconnect the power supply before adjusting the vibration motor excitation force.What should pay attention to is that when you adjust the excitation force two vibration motor eccentric position consistent tone to avoid the phenomenon discovered the emphasis on feeder according to the damage depth.It is generally useless to adjust the excitation force is needed, please do not attempt to open the vibration motor,adjust the eccentric angle.

vibration feeder

Is The Driven Device Suitable For Linear Vibrating Screen?

Linear vibrating screen is designed with dual-vibration motor drive.According to the capacity of different material is different, the vibrating screen model and the vibration source is different also.Here PK Machinery would like to talk about the driven device selection for linear vibrating screen.
For some ceramics, food, and other less dense granular material, when dealing with a smaller amount, demand shaker model is small, usually less than the length of the screen surface 3000mm, width of the screen surface is less than equal to 1200mm, the small screen of its own weight , to meet the amount of processing conditions, the vibration source shaker select both synchronous and opposite vibration exciting force generated by the motor rotation direction. The motor can be installed on top of the screen box, bottom and sides.

Linear Vibrating Screen

For some coal, ore, building materials and other denser particulate material is too large, the environmental conditions, the general requirements of larger handling capacity, demand shaker models are also relatively large, usually larger than the screen surface length 3600mm, when the screen surface is greater than the width of 1500mm, the weight of the screen itself is also heavier. When the amount of processing required to achieve, you need to select running motor driven exciter excitation force generated as the vibration source, achieve grade materials. Exciter is usually installed above or below the screen box.
If conditions have space restrictions or special requirements, we also can make special optimized design.
If you have any interest,welcome to contact us via www.pkmachinery.com

Linear Vibrating Screen