Shaker possible causes and remedies

Circular vibrating screen possible failures and the corresponding exclusion method are the following:

1, shaker motor is damaged, replace the motor can be taken to approach;

2, the control circuit of the electrical components is damaged, replace the electrical components can be taken way;

3, the voltage is low, the power supply can be taken to change the way;

4, vibrating sieve surface material buildup too, can be taken to clean the screen surface material way;

5, the vibrator fails, the vibrator can be taken to repair method;

6, the inner grease thickens agglomeration vibrator can be taken to clean vibrators, grease update adds the appropriate method.  crusher plant

The technical and economic indicators screening process is screening efficiency and productivity. The former quality indicators, the latter for quantitative indicators. There is

a certain relationship between them, but also with many other factors, these factors determine the result of screening. Factors affecting the screening process can be roughly

divided into three categories:

First, the physical properties of the material to be screened

Including grain size of the material itself, humidity, clay content and particle shape.

When the material fines content is high, productivity is also large sieve. When the humidity of materials, in general screening efficiency will be reduced. However, larger mesh

size, the smaller the influence of water, so the larger the wet material containing water, in order to improve the screening process, the general approach can be used to

increase the mesh, or the use of wet sieving. Materials containing large mud (mud when greater than 8%) should be used wet sieving, or pre-washing.

Second, the screen surface properties and structural parameters of the shaker is to make the particles and the screen surface for vertical movement, so the high efficiency,   coal crushing plant

large production capacity. The relative motion of particles and the screen surface is parallel to the main sports bar screen, flat shaker, drum sieve, with its screening

efficiency and productivity are low.

For a given material, the sieve productivity and efficiency depends on the mesh size sieve. Productivity depends on the width of the screen surface, wide screen and high

productivity. Screening efficiency depends on the length of the screen surface, the screen surface long high screening efficiency. Average aspect ratio of 2.

Effective sieve area (ie, the entire screen surface area and sieve area ratio) is larger, the productivity per unit area of ​​the screen surface and higher screening efficiency.

Sieve size is larger, the greater the productivity of the screen surface units, screening efficiency.

Third, the production conditions of

When the load is large sieve screening efficiency is low. Largely peaceful sieve sieve size and the total rate depends on screening efficiency; sieve larger, requiring lower

screening efficiency, the productivity is higher.

Sieve inclination to be appropriate, generally determined by experiment. Then the amplitude of vibration times the sieve, the sieve structure which sex-related, in a certain

range, the vibration can be increased to increase screening targets.

How to prevent failure shaker

 
    As a non-standard equipment shaker vibration equipment for most users, the shaker may all devices in the user hardly a major equipment; however shaker failure frequency is

higher than the traditional power machinery products, because the vibration device itself is a kind of vibration destructive conduct scientific use of a product. Equipment for

conventional mechanical vibrations, it means that the occurrence of failure sign, and by vibrating the vibration device is precisely the work required to complete one purpose

and requirements of a product. Although the vibration industry are committed, anti-vibration device itself destructive optimized structure design and research, but still  Semi-mobile crushing plant

vibrating equipment failures occur frequently. And shaker is often arranged in the user's throat production process, once the shaker fails, it will cause the entire production

system linkage Parking, giving users a significant loss of production. On mining, coal, metallurgy enterprises, such as a sudden stop repair one day, then at least ten direct

production efficiency loss of tens of thousands, as many as hundreds of thousands or even millions of dollars. To avoid this phenomenon, the user only keep abreast shaker

operating conditions, to discover hidden maintenance arrangements well in advance.  crusher plant manufacturer

Why poor quality circular vibrating sieve

 
Caused by poor quality circular vibrating sieve reasons may be:

1 sieve clogging

(2) into the sieve material moisture increase

3 Screen Machine uneven feed

4 screen surface material layer is too thick  coal screening machine

5 Pull the screen is not tight, too loose drive belt



Workaround:

1 Light Screen Machine loading and cleaning the screen surface

(2) changing the angle of the screen box

3 adjustable screening machine feed
  Linear vibrating screen
4. Reduce screening machine feed

5. Tensioning screen, belt tensioner

Affect mechanical shaker and a variety of screening processes of the main factors

    The technical and economic indicators screening process is screening efficiency and productivity. The former quality indicators, the latter for quantitative indicators.

There is a certain relationship between them, but also with many other factors, these factors determine the result of screening. Factors affecting the screening process can be

roughly divided into three categories:

First, the physical properties of the material to be screened

Including grain size of the material itself, humidity, clay content and particle shape. Mining vibrating screen

When the material fines content is high, productivity is also large sieve. When the humidity of materials, in general screening efficiency will be reduced. However, larger mesh

size, the smaller the influence of water, so the larger the wet material containing water, in order to improve the screening process, the general approach can be used to

increase the mesh, or the use of wet sieving. Materials containing large mud (mud when greater than 8%) should be used wet sieving, or pre-washing.

Second, the screen surface properties and structural parameters of

Shaker is to make the particles and the screen surface for vertical movement, so the high efficiency, large production capacity. The relative motion of particles and the screen

surface is parallel to the main sports bar screen, flat shaker, drum sieve, with its screening efficiency and productivity are low.  China Vibrating Screen

For a given material, the sieve productivity and efficiency depends on the mesh size sieve. Productivity depends on the width of the screen surface, wide screen and high

productivity. Screening efficiency depends on the length of the screen surface, the screen surface long high screening efficiency. Average aspect ratio of 2.

Effective sieve area (ie, the entire screen surface area and sieve area ratio) is larger, the productivity per unit area of ​​the screen surface and higher screening efficiency.

Sieve size is larger, the greater the productivity of the screen surface units, screening efficiency.

Third, the production conditions of

When the load is large sieve screening efficiency is low. Largely peaceful sieve sieve size and the total rate depends on screening efficiency; sieve larger, requiring lower

screening efficiency, the productivity is higher.

Feeding homogeneity very meaningful for the screening process.

Sieve inclination to be appropriate, generally determined by experiment. Then the amplitude of vibration times the sieve, the sieve structure which sex-related, in a certain

range, the vibration can be increased to increase screening targets.

Mineral processing equipment in the re-election process and equipment

 With increased awareness, energy conservation is gradually being advocated. In the past 30 years, environmental awareness is growing. Cost and maximum recovery plant design is

no longer the only consideration. Efficient, effective and environment allows processes, coupled with maximum recovery does not necessarily lead to understanding today's best

economic considerations. Re-elect not limit the degree of coarse particles, assuming full dissociation between minerals, as coarse tailings will be able to exclude the case,

thereby reducing the need for grinding energy. In addition, the re-election does not require agents. Since tailings and waste emissions purification is simplified, not only

reduces the main costs, and reduce environmental costs. Here introduce, re-election and re-election process equipment.  crushing and screening plant
    1, the re-election process

    Ore re-election process is composed by a series of successive operations. The nature of the job can be divided into preparation operations, sorting operations, product

handling operations in three parts.

    (A) prepare assignments, including a: To make useful minerals monomer dissociation carried crushing and grinding; b: Multi gum or ores containing more clay and ore washing

off the mud; c: use screening or hydraulic classification method of ore milled by size grading. Ore grading were selected, select the operating conditions conducive to improve

the separation efficiency.  coal vibrating screen

    (2) sorting operations, is the main ore sorting link. Sorting process from simple to complex, composed of simple operations by the unit, such as heavy media separation.

    (3) product processing operations, mainly referring to concentrate dewatering, tailings transport and stockpiling.

    2, re-sorting equipment

    Modern mineral processing, the required equipment must have the following characteristics: (a) processing capacity, modern mineral processing objectively demanded to create

economies of scale benefits. (2) the effect of micro-fine particles is remarkable, especially for grain-01037mm be obvious effect, the original equipment can basically guarantee

+01037 mm size fraction recovered. (3) enrichment is relatively high, sorting index is good. (4) low power consumption. (5) simple structure, easy to maintain. To re-elect

equipment hydraulic classification of YTC classifier tank, sub mud bucket, heavy media separation conical heavy media sorter, heavy medium vibration chute, heavy medium cyclone,

bevel wheel heavy media sorter, jump Jig, chute sorter, shaker, vortex sorter, photo sorter and so on.

Shaker motor problems Analysis

Laboratory shaker main supporting standard sub-sieve used instead of hand sieve, with time standards, intensity, frequency, uniform advantages. In the process of using the

shaker vibration motor burnout can be considered more common faults, then why could easily cause such failures happen? Below cause vibration motor burned for several reasons and

preventive measures described in detail:  coal crushing plant
1) anchor bolt loosening problems

This is caused by the vibration motor burned one of the major failures due to the special structure of the vibration motor itself, its ends eccentric excitation force generated

per minute to two thousand times the impact on the bolt, and then due to the vibration of the motor itself of the vibration, the bolt is easy to loose, once a loose bolts, in a

short period of time will cause other bolts loose, and even rupture, thus burning motor.  coal production line

Preventive measures: ① often reinforced bolt; ② increased locking devices; ③ foot and motor ground floor to ensure good contact, even by force to make a few bolts.

In the selection, try using one of the seat shell vibration motor (ie, to foot the chassis), place one foot is processed, it can ensure its standards. The seat shell allogeneic

(ie, to the foot end caps at both ends), due to the foot is a graded processing, re-assembled, assembly errors due the presence of the foot is not easy to ensure its ground

level, so that the subject of several bolts force is not easy even while a larger force of a bolt is easy to loose, thus causing the other bolts loose, broken, burned the motor.

2) Installation Issues

Because vibration motor at both ends with heavy eccentric, such as vertical or inclined installation (ie, vertical or inclined axis horizontal), the bearing axial eccentric

block to withstand gravity. If no special device in vibration motor (ie plane bearing), it will adversely affect the bearing, thus shortening life.

Preventive measures: ① Select the vertical vibration motor (ie increase inside plane bearing); ② Avoid vertical or inclined installation.


3) eccentric adjustment

Adjust the eccentric block, mistakenly tune ends eccentric direction reversed, so that the vibration motor torque generated a space, so that the vibration motor work in a non-

normal state, thereby causing burned. Therefore, adjusting the eccentric block, be sure to pay attention to its symmetry, that both ends of the eccentric block to twenty-two

correspondence, or that both ends of the center of gravity of the eccentric shaft parallel with the cable, can not be a different surface states.

4) protective cover sealing problems

Since most of the vibration motor is very poor working conditions, dusty, if shields Mifengbuyan easily into the dust, causing friction eccentric operation, thus burning motor.

So bad place in the work environment, a protective cover to increase the seal, two guards to regularly clean the dust inside.

5) Temperature

Equipment conveying material temperature is not too high. Because the vibration motor is rigidly connected with the device, it can be said as a whole, if the device conveying

the material temperature is too high, it is very easy to cause vibration motor and chassis ground temperature increases, causing cooling difficulties, thereby burning motor.

Preventive measures: ① without affecting the device work under the premise, as far as possible away from the vibration motor high temperature material; ② to find ways to

reduce the temperature of the material.

6) heat problem

General Motors - ends with a fan, work along the casing above the wind flow studs, not only heat faster, but also above the dust cleared, the motor in good working condition.

The vibration motor can be due to fanless cooling, thanks to the natural cooling, plus most of the work environment is very harsh, dusty, dust easily deposited on the surface of

the motor, causing the internal temperature is too high, burning motor.

Preventive measures: ① often clears the motor surface dust to be in good working conditions; ② In the design process, the surface should be smooth, vibration motor, so that is

not easy to accumulate dust, if dust larger environments, you should consider reducing go to cabinet surface cooling ribs, because at this time, not only would not achieve the

cooling effect cooling ribs, but easy to make dust accumulation, impeding the motor cooling.

Vibration sieve shaker use and maintenance

    Three million vibration screening filter (vibration sieve) of the basic principles of the Department by the lower end of the motor shaft is installed hammer (hammer uneven Heng), the rotary motion of the motor into a horizontal, vertical, inclined three elementary motions, This movement then communicated to the screen surface. If you change the weight of the upper and lower parts of the phase angle can change the direction of travel of raw materials.
Motors for use:
This series motor when the following conditions are met, continuous output rated excitation force.
1, the vibration acceleration: not more than 7g (g: acceleration of gravity)
2, Ambient temperature: less than 40 ℃
3 Altitude: not exceed 1000m
4, Power frequency: 50Hz
5, voltage: 380V
6, the temperature rise: less than 80K (resistance method)
Before you install:Dry vibrating screen
1, check motor signs are consistent with the requirements.
2, with a 500-volt megger insulation resistance of the stator winding its value should be dried, the drying temperature should not exceed 120 ℃.
3, check the motor of the fasteners, to guard against loosening.
4, check the motor for signs of damage, deformation.
5, check whether rotating flexible, if unusual, should be excluded.
6, check the power, whether phase, and no-load operation for 5 minutes.
Installation and adjustment:
1, the motor should be fastened to the mounting surface, the mounting surface must be smooth and flat.
2, the motor can be installed horizontally.
3, the motor leads with four core rubber cable YZ-500V, then the power cable is not allowed when there is acute lead off, and with the vibrating body and firmly secured.
4, the motor should be reliable grounding, motors with a grounding device, the lead end has signs can also use the foot sturdy bolt grounded.vibrating screen design
5, the exciting force adjustments.
Use and maintenance:
1, the machine should be installed in the electrical protection device.
2, the machine run early, once a day at least check bolts to prevent loosening.
3, when the motor rotation direction does not meet the requirements, you can adjust the power supply phase sequence.
4, the motor should ensure good lubrication, running every two weeks or so added lithium grease (ZL-3) once, refuel, through the oil cup add some lithium grease. When using sealed bearings, the motor is not installed oil cup.
5, the machine accumulated 1500 hours, you should check bearings, if serious injury should be immediately replaced.
6, the machine parked again after a long time use, the insulation resistance should be measured for the 500-volt megger, should be greater than 0.5 megohms.
Routine maintenance
1, before the start:
(1) Check the coarse mesh and fine mesh for damage
(2) whether the locking ring beam for each group
2, start time:
(1) Note any abnormal noises
(2) whether the current stable
(3) whether the abnormal vibration
3, after use: After each use that to clean up.
Regular maintenance:
Regular inspection coarse mesh, fine mesh and springs without fatigue and damage, whether all parts of the body resulting from damage due to vibration, the site must be added lubricant lubrication.