Reasons lead to circular vibrating screen mesh plug

When circular vibrating screen works, the material properties are very different, as well as its shape. Due to different shape of material ,it can produce a various forms of mesh plug.After the analysis of PK machinery engineers, the cause of mesh plug mainly shown as follows:
1.Contains a lot of close to the separation point particles
2. The material moisture content is higher
3. The spherical particles or material has multi-contact points property to mesh
4. Static electricity occurs
5. Material is a fibrous material
6. Flake shape material proportion is more
7. Woven mesh wire diameter is too thick
8.Thick Sieve mesh, unreasonable hole shape design, which will lead particles get stuck.

How to become a professional buyer for Circular Vibration Screen?

How to receive the circular vibrating screen quotation in a short time?
You need to offer following parameters if you want to buy a circular vibrating screen:
1.Material Parameters:
(1)Material name:________.If possible,please provide material photos.
(2)Handling capacity:_________ton per hour(t/h)
(3)Density of material:________ton per stere(t/m³)
(4)Material size:______mm.
(5)Water content:________%.
Equipment Parameters:
(1)Layer number:________layer. for example,If you want to get 3 kinds size range material,the layer number should be 2 layers.other situations and so on.
(2)Mesh size of each layer:________ mm. For example,if material size is from 5mm to 20mm,you want to divide into 3 kind size range material.they are 5mm~12mm,12~16mm,16mm~20mm,so the top layer mesh size should be 16mm,and the bottom layer mesh size should be 12mm.
(3)Material size distribution:_________%.for example,if you want to get above three kinds material(5mm~12mm,12~16mm,16mm~20mm,)you need to tell us their size distribution:5mm~12mm____%,12~16mm____%,16mm~20mm____%.
(4)Driven device parameters:
Brand requires:________ABB/SEW/Siemens/Domestic
Voltage:3 phase______V_____Hz.
(5)Other
What’s the upstream equipment above screen inlet?_______we need to know the loading method.
What’s the downstream equipment under screen outlet?_______we need to know the discharge method.
If you can offer above information,you will receive a accurate quotation in a short time.

Maize can not be sieved without vibrating screen

 Vibrating screen should be adopted in the beginning of the removal of impurities during the production of maize starch,in order to ensure a safe production of raw materials,so the removal of impurities is very necessary, maize raw materials contain a variety of impurities, dust, organic impurities, inorganic impurities. The general design will be 3 screen decks, the first deck screen surface with an aperturesize of 17-20mm hole, aimed to eliminate over sized impurity; second deck screen surface with an aperturesize of 12-15mm hole, used to remove impurities of medium size, third deck screen surface with an aperturesize of 2mm hole, used to remove minor impurities.

Advantages are high precision, large capacity, simple structure, low energy consumption, low noise, long service life, good sealing, no dust overflow in the screening process, and reduce the pollution of the dust, the screening efficiency is up to 98. It is very suitable for the screening and classification of powdery and granular materials, applicable to dry powder material chemical industry, food, medicine, metallurgy, plastics, glass, building materials, food, fertilizer, abrasives, ceramics etc.

 

Small part with large effect : Vibrating Screen damper

Do you know Circular Vibrating Screen damper?it’s a device which limits vibrating screen horizontal vibration.
May be you feel puzzled,is there any vibration in the horizontal direction?The answer is no In theory, but the practice has proved that it exists, the reasons are as follows:
(1) The distribution of material on the screen mesh is uneven.
If the material is uneven,it can lead to the uneven force for screen box ,thus vibrating error appears.
(2) Installation error.
The Circular Vibrating Screen needs horizontal installation,but in the process of installation, the error will inevitably occur, resulting in a height of four supports occur small deviation, but the small deviation will be amplified by the vibration exciter, thus it will result in greater vibration deviation.
(3) the stress error of the spring.

 

As we all know, it is only a reference value to measure the standard of a vibrating spring,if the stress in the same reference range, it will be defined as the same model of vibration spring, therefore, it is hard to avoid the stress error.
There is a great harm to the vibrating screen box horizontal vibration If you don’t solve in time, the side wall of the screen box will be worn, and the worse result is that the side wall will be worn out, which will affect the normal operation of the circular vibrating screen.
So how to avoid the occurrence of such an accident? Here we will introduce the key part of the circular vibrating screen - damper.
As shown in figure, the structure of the damper is composed of 6 parts:adjusting bolt, flange, spring base, spring, rubber base and rubber.
When the screen box appears the horizontal vibration error, the internal spring of damper will occurs a reverse thrust to the sieve box, thus it will restrict the screen box in the horizontal movement to avoid the horizontal deviation.

 

What is the relation between sieve inclination and screening efficiency or capacity?

During the use of vibrating screen, the particle size of sieve material particle size is different, the accuracy and requirement of material are different, the capacity is also different, thus the relation between sieve surface inclination and capacity is inseparable,as well as the screening efficiency. Now PK Machinery will explain the relation as follows:

The angle is closely related with the sieving equipment capacity and the screening efficiency. When the angle increases,the casting strength of the oversize material will increase, thus the forward movement speed of material on the screen surface will quicken, meanwhile the capacity of vibrating screen increases, however, the time of the material staying on the screen surface will be shortened, reducing the probability of particles going through sieve, thus screening efficiency will reduce. 

On the contrary,the capacity will be reduced,and the screening efficiency will be increased. In order to make the sieve screening efficiency ti be controlled in the ideal scope, the screen surface angle of circular vibrating screen generally ranges from 15 to 25 degrees, the sieve surface angle of linear vibrating sieve ranges from 0 to 8 degrees.  

Differences between the YK and YA circular vibrating screen

When customer choose and buy circular vibrating screen, YA and YK series of vibrating screens are optional. So what's the difference between the two types of vibrating screen? Which series should choose? Here,PK Machinery answers for you.
In general,YA and YK belong to circular vibrating screen series, YK series block type eccentric circular vibrating screen is updated products of YA axis eccentric circular vibrating screen.

 

According to the research,development and the application level of domestic and overseas vibration machinery , bring in the advanced technology in the same industry of Germany, Japan and other countries, combine with the actual running environment,our engineers fully optimize and design a new type of high efficient YK series vibrating screen.
In addition,retaining the feature of the original YA type axial eccentric circle vibrating screen,YK series circular vibrating screen has the following significant advantages:
1.Exciter adopts eccentric block form which not only makes the single heavy exciting force of the eccentric exciter weight increase, but also exciting force can be randomly controlled, so it is easy to modular design and use;
2.Simple machine structure is beneficial to improve the level of equipment manufacturing technology and assembly accuracy;
3.Using the flexible connection of cross axle cardan shaft or rubber coupling etc which makes running smooth;
4.Sieve machine is more efficient with greater capacity;
5.Using cycle and service life is longer;
6.Equipment maintenance will be simple and convenient,the machine running efficiency is improved significantly.

How much knowledge do you know about belt conveyor magnetic separator ?

When customers purchase belt conveyor, they only provide conveying material name, but seldom mention whether the material contains other impurities or not.For example, if long and big iron contained in the material, it will be easy to scratch the conveyor belt, so magnetic separator plays an important role.In this article,we will introduce the magnetic separator as follows:
Magnetic separator is applicable to various fields deironing, which can realize continuous iron absorption and removal.
Please pay attention to the conveyor belt, bandwidth, dip angle, material properties, moisture, material thickness an iron content percentage, the nature of the magnetic material, as well as the deironing requirements and the environment condition to select a suitable magnetic separator.
Magnetic separator can remove the ferromagnetic impurities which are mixed in material, to ensure the safe and normal transmission system work of the crusher, grinding machine and other mechanical equipment,at the same time it can effectively prevent belt scratch caused by the large, long iron besides,the grade of raw materials can be significantly improved.

Belt conveyor tripper and circular screen for wooden chip were delivered to Thailand

On 11th December 2015,circular vibrating screen,belt conveyor with tripper used for wooden chip production line were loaded to containers in PK Company from Qingdao Port to Bangkok PAT Port.

Circular vibrating screen is designed to separate wooden chip size larger than 50mm and stone size smaller than 4mm.While the 1000mm and 650mm belt width conveyor with tripper will be placed on the warehouse top for the purpose of conveying wooden chip in order to achieve the fully utilization of warehouse storage.

Meanwhile,metal detector,permanent magnet will be installed at the feeding end aiming at preventing materials from metals,metal detector and drum separator are used for the purpose of eliminating the metal in the production line.They are also required by clients.

With the development of our company, we can provide the best products and service to our customer. Any enquiry, feel free to contact us:www.pkmachinery.com

What reasons lead to material accumulation phenomenon of vibrating screen?

Some customers said material accumulation phenomenon occurred in the use process of vibrating screen, according to many years of analysis experience, the reasons can be summed up in four aspects:
1.There is a problem of vibrating screen mesh selection, too small mesh will cause a low rate of material passing through the mesh.
2. Check whether the ground level of the vibrating screen is flat or not, besides,high material inlet will affect the material running track, resulting in material tilting to one side.

 

3.Check whether the screen mesh and outlet are horizontal or higher than outlet or not, under normal circumstances, it should be horizontal or 6mm higher, the design is not the same according to different material discharging outlet.
4.There is a problem on the vibration motor angle adjustment, improper angle adjustment of vibration motor will cause material accumulation, if the angle is small,the material will spread outward quickly on the sieve surface,while if the angle is large, the spreading speed will be slow. If you have strict requirements of screening accuracy, the angle can not be too small so as not to affect the screening precision. In general, the vibration motor angle of the vibrating screen is 45 degrees when leaves the factory.
Users can also change the vibration motor angle to 100 degrees according to the the special requirements of the material ,and then material will be concentrated to the central screen mesh. 

How to solve problem of damp material blockage occurs in vibrating screen ?

Vibrating screen is a kind of high precision and fine powder screening equipment, with the characteristics of low noise, high efficiency, small size and quick screen mesh replacement,it adopts fully enclosed structure which is suitable for particles, powder, liquid, etc. Clients ever said wet material blockage occurred in vibrating screen,here PK Machinery will list some suggestion,hope it is helpful.
1.Increase the excitation force of vibration motor and increase the amplitude.
2.Increase the vibration frequency, please use the high-frequency vibrating screen.
3.Diluted with water to increase the liquidity of material.
4.Replace the screen mesh regularly to avoid damp material blockage.
5.Manual work assisted cleaning up the screen mesh blockage.
6.Equip with cleaning device, such as the brush.
Hope above mentioned are workable, if you have the other problems about vibrating screen,welcome to contact us freely.

Further information please click:http://www.pkmachinery.com/faq/solve-damp-material-blockage-vibrating-screen.html

Installation notice of circular vibrating screen punching mesh

General screen meshes include manganese steel woven wire mesh, punching mesh and stainless steel screen plate etc. Each kind mesh should be selected according to the on-site working condition. Today we will talk about the installation of punching screen mesh.
The punching screen mesh installation method for circular vibrating screen is the same with dewatering screen.
Generally speaking, the slurry dewatering screen is horizontally installed,however, in order to guarantee the application effect, the screen mesh is installed with a negative angle. The screen mesh can be polyurethane material with tension type installation, or stainless steel bar screen mesh with compression type to meet different working conditions.

Circular vibrating screen is installed with angle, when adopt the punching screen mesh, it needs lumps of wood to press tightly, then tension with wood key . Please see the following sketch: 
If the screen mesh tension is not enough, it will bring negative influence:
1.The screen mesh is easy to bend and the screen mesh will slack and easy to revibrate. Meanwhile it will reduce the screen mesh service life. 
2.It will influence the effective screen surface, reduce the screening efficiency.
3.It will stop the material moving forward and reduce the capacity.
In this regard,in order to guarantee the smooth screen mesh , increase the service life and guarantee the capacity and screening efficiency, the tension of screen mesh must be improved. 

Further information please click: http://www.pkmachinery.com/faq/installation-circular-vibrating-screen-punching-mesh.html 

Improve dry or wet screening efficiency of vibrating screen

Following methods can improve screening efficiency of vibrating screen:

1.For dry screening,we should strictly control the water content,for material with high water content,please consider screening with ingredients.
2.Reduce the of plugged hole,we can consider using the self-cleaning sieve plate,for example,for spring rod type screen mesh surface,we can add a prevent blockage device below the screen.
3.Improve the aperture percentage,high aperture percentage is beneficial to improve the screening effect.
4.Adjust the feeding way.Material can be fed according to the sieve surface width and ensure the sieve surface can be fully utilized.
5.If possible,please consider the dip angle of the screen machine,suitable angle is beneficial to reduce the thickness of material and achieve thin material screening.
6.For circular vibrating screen,we can consider adjusting the balance weight to improve the screening effect.
7.If possible, coarse screening before feeding material.
8.If possible, we can adopt wet screening,it’s the most effective way to improve the screening effect. 

Installation and Commissioning of YA Circular Vibrating Screen

1.Before installation,please refer to the installation drawing of concrete foundation, embedded anchor bolts or embedded steel plate ,the flatness error should be less than 3mm.
2.After the completion of installation, please check and adjust the levels of spring to make sure supporting position is under uniform stress. The motor axis should be 3-5mm lower than the axis of the vibrator, the height of support spring symmetric point should be equal (error ≤ 3 mm).
3. Each part of the vibrating screen should be firmly connected, all bolts should be tightened before start running.
4. Adjust the eccentric vibrator angle which can realize the adjustment of the excitation force, so as to adjust the amplitude of vibrating screen.
5. The distance between the vibrating screen and other obstacles should be less than 100mm.
Further information please click: www.pkmachinery.com  

What should be done when operate and maintain Circular Vibrating Screen?

1. Please check if the bolts are loose or not before the startup of circular vibrating screen, if any looseness,please tighten timely.

2. Running without load for 4 to 6 hours to achieve smooth running of screen body , the vibrator bearing temperature is ≤75℃.
3.After non-load running, please tighten the screw bolt again.
4.Check the fastening condition of the bolts regularly once the operation becomes normal.
5.Check the wearing parts frequently, the damping spring which is damaged or without elasticity,please replace at once. If fracture or wear occur to screen, please tighten or replace the spring timely. Please check the vibration source instructions to adjust,use and maintain the vibration source.

6.Stop the machine after the material on screen surface are completely discharged. 

Hope above mentioned are helpful,more information please click: www.pkmachinery.com 

Circular Vibrating Screen Introduction

► Introduction 
Circular vibrating screen adopts cylinder postures eccentric block to produce strong exciting force. Its main body is connected by high strength screw bolts. A circular, elliptical vibration motion is created in order to sieve the materials efficiently. It is composed of screen box, screen mesh cloth, suspension (or support) device, underframe and motor.

► Working principle
Circular vibrating screen separator uses eccentric block(YK type)/eccentric shaft(YA type) to produce strong exciting force, due to the unbalanced centrifugal force of inertia of the weights on the exciter, screen box vibrates, it can obtain different amplitudes by changing the exciter eccentric weight.

► Application
Circular vibrating screen is available for smelting , quarry , coal preparation, ore dressing, energy, power, chemical industry,construction material.

► Features
   1.Simple structure, easy maintenance, high production efficiency
   2.Using large clearance bearings and lubricated with thin oil, little noise and long service life
   3.Sieve beam and screen box adopts high strength bolt connection, no welding processing
   4.Small amplitude, high frequency, large dip angle structure to enable high screening efficiency and great handling capacity.

                                         

Parameters

►Technical datas:

Model	Area	Angle	Material	Capacity	Frequency	Double Amplitude	Motor
	(m2)	(°)	Size (mm)	(t/h)	(r.p.m)	(mm)	Model	Power (kW)
YA1236	4.3	20	≤200	40-250	730	8-11	Y160L-8	7.5
2YA1236	2*4.3	20	≤200	40-250	730	8-11	Y180L-8	11
YA1530	4.5	20	≤200	42-260	730	8-11	Y180L-8	11
2YA1530	2*4.5	20	≤200	42-260	730	8-11	Y180L-8	11
YA1536	5.4	20	≤200	51-300	730	8-11	Y180L-8	11
2YA1536	2*5.4	20	≤200	51-300	730	8-11	Y200L-8	15
YA1542	6.3	20	≤200	60-350	730	8-11	Y180L-8	11
2YA1542	2*6.3	20	≤200	60-350	730	8-11	Y200L-8	15
YA1836	6.5	20	≤400	61-400	730	8-11	Y200L-8	15
2YA1836	2*6.5	20	≤400	61-400	730	8-11	Y225S-8	18.5
YA1842	7.6	20	≤400	80-800	730	8-11	Y200L-8	15
2YA1842	2*7.6	20	≤400	80-800	730	8-11	Y225M-8	22
YA1848	8.6	20	≤400	80-680	730	8-11	Y225S-8	18.5
2YA1848	2*8.6	20	≤400	80-680	730	8-11	Y225M-8	22