What factors are related to the throughput output of linear vibrating screens?

Vibrating screen is an indispensable auxiliary equipment in the sand and gravel production line, and the screening link is an important link in the production process of machine-made sand. Machine-made sand can be screened into sand and gravel of different specifications and particle sizes through the screening of the vibrating screen, and the screening effect of the vibrating screen also affects the income of the machine-made sand, but in the operation process of the vibrating screen, there will be some factors that affect the screening efficiency of the vibrating screen

1. Shape of screening material

The shape of the screening material will affect the screening efficiency of the vibrating screen, and if the shape of the material is spherical, it is easy to pass through the screening; However, it is difficult for strips, sheets or polygonal materials to pass through the screening of square or round hole vibrating screens, which will affect the screening efficiency of vibrating screens.

2. The sieving material is easy to sieve and particles

Easy sieving particles refer to the particles that are easy to pass through the vibrating screen screen, and the screening material contains easy sievable particles and obstruction particles, which are easy to block the sieve hole and affect the screening efficiency of the vibrating screen. Therefore, the higher the content of easy sievable particles in the screening material, the higher the screening efficiency of the vibrating screen.

3. The water content of the screening material

The higher the water content of the screening material, the stronger its adhesion, so it is easy to agglomerate, which leads to the blockage of the screen hole of the vibrating screen and reduces the screening efficiency of the vibrating screen. Therefore, the material with high moisture content can be dried before screening to reduce the moisture content of the material.

1. The shape of the screen hole of the vibrating screen

Different shapes of sieve holes have different screening capacity, so when selecting sieve holes, we should pay attention to the particle shape of the sieved material and choose the appropriate sieve hole shape.

2. Vibrating screen opening ratio

The greater the porosity, the higher the screening efficiency and the stronger the production capacity, but it also has the shortcomings of short service life and low strength.

3. The size of the screen surface of the vibrating screen

The screen length ratio of the vibrating screen should be between, and the aspect ratio is too large or too small, which will affect the screening efficiency of the vibrating screen.

4. The inclination angle of the screen surface of the vibrating screen

The inclination angle of the vibrating screen is generally 0 25 °, the inclination angle is too large to affect the screening efficiency of the vibrating screen, and the inclination angle is too small to affect the production capacity of the vibration point, so the inclination angle should be between the appropriate angles.

Whether it is a linear vibrating screen or a rotary vibrating screen, as long as it is a screening machine that processes materials, its output should first consider the characteristics of the materials.

1. The material with good fluidity, low viscosity and appropriate specific gravity is easier to screen.

2. It depends on the purpose of using the screening machine, whether it is graded filtration or impurity removal. Thus the mesh number of screens used is taken into account.

After considering the material and output requirements, let's look at the linear vibrating screen.

1. The shape of particles and sieve holes.

In the actual production, most of the screening raw materials are cylindrical (pellet feed grading) or irregular particles, the sieve hole has both round and rectangular shapes, and the state of the material particles when they contact the sieve hole has a great influence on whether the particles can pass through, such as a 4 10 mm pellet can pass through a sieve hole with a pore size of 5 mm when it is upright, and the transverse can not. Therefore, the passage of particles is contingent and can only be studied by statistical means. Generally, for cylindrical particles, the rectangular sieve has better passing performance; For irregular particles with little difference in size in all directions, the passing performance of round holes is better.

2. The opening rate of the sieve surface.

The larger the opening rate of the sieve surface, the better the passing performance. Under the condition of ensuring the strength of the sieve surface, the woven sieve can obtain a higher opening rate than the perforated sieve, so the passing performance of the former is better than that of the latter.

3. The thickness of the material layer.

When using a plane screen, if the material layer on the screen surface of the vibrating screen is too thick, and the small particles in the upper part of the material layer are difficult to pass through the screen hole, it will cause the false screening rate to rise, which will increase the net raw material loss in the raw material cleaning, and will reduce the output (the upper screen layer is too thick) and affect the quality of the finished product (the lower screen layer is too thick) in the particle classification. If the material layer is too thin, the screening output is too low and it is not desirable. The appropriate thickness of the material layer should be determined by the test, and the material layer can be slightly thicker when the inclination angle of the screen surface is small and the amplitude of the sieve body is large.

Theoretically, the thickness of the material layer is determined by the output, but in practice, due to the uneven feeding of the screen surface, the material may be concentrated on one side of the screen surface, resulting in the local material layer being too thick and affecting the screening effect. Cylindrical and conical screens have similar problems, and when the instantaneous material flow is too large, the screening effect is also affected.

4. Sieve body movement state.

One of the necessary conditions for the screening process is that there is a suitable relative motion between the screening material and the screen surface, and the method of generating this relative motion can be the horizontal reciprocating linear motion (rotation), vertical reciprocating linear motion (vibration) or a combination of the two. The sieve body only has horizontal reciprocating motion or vertical reciprocating motion, and the screening effect is not ideal. The latter is prone to uneven thickness of the material layer due to the lack of horizontal relative movement of the material and the screen surface.

Practice shows that the rotary vibrating screen that combines the two movements has a better effect.

5. Material characteristics.

The particle size, moisture content, friction characteristics, fluidity, etc. of the material are all related to the screening process. The difference in the particle size of the material is the premise of the screening and separation of the material components, and the greater the difference, the easier the screening process will be. The higher the moisture content of the material, the greater the internal and external friction angle, and the worse the fluidity, the worse the performance of the particles through the sieve hole.

Therefore, in actual use, in order to obtain a good screening effect, different process parameters should be selected according to the specific situation of the material.

In fact, there are quite a lot of reasons for the poor screening effect, such as the screen hole is blocked, the material layer is too thick, the screen is not tight, and the material is too much moisture into the screen to cause the material to stick to the screen and cannot be screened smoothly.

1. Sieve hole blockage, sieve hole blockage is the most common reason for the poor screening quality of vibrating screen, at this time, the vibrating screen composite should be reduced, and the screen surface should be cleaned to solve the problem of screen hole blockage.

2. The moisture of the sieving material increases, and the moisture of the sieving material generally has certain requirements, and the excessive moisture is easy to cause the material to bond into a clump, and it is not easy to pass the sieve. What if the moisture of the sieved material is too large and you want to achieve the screening effect? Huanxin Machinery teaches you a trick to change the inclination angle of the sieve box, and increasing the inclination angle can improve the problem of poor screening quality.

3. The uneven feeding of the sieve machine will not only cause the occurrence of the situation of material breakage, but also greatly reduce the production efficiency if the feeding is too small, and the excessive material accumulation will easily cause the screening quality to be poor, and even lead to the operation failure of the vibrating screen if it is serious, so the feeding of the screen machine should be adjusted to ensure uniform feeding.

The characteristics of the material, the proximity of the similarity between the material and the sieve hole, and the state of the movement of the material on the sieve body.

Generally, it is the nature of the material: it mainly refers to the specific gravity of the impurities, the size of the moisture content, the particle size of the material and the difference in the particle size of the impurities.

Screen surface form: including the shape and size of the screen surface, the area of the screen surface, the inclination angle of the screen surface, and the amplitude of the screen surface.

Screening operation: It mainly refers to whether the material is evenly fed when it is fed and the size when it is fed.

You can refer to the introduction materials of Xinxiang Dayong.

Particle and mesh shape.

Screen surface porosity.

Layer thickness of the material.

Ethmoid body movement.

Material characteristics.

The feeding amount, the feeding amount is large, the sieving time is long, the screening accuracy is not high, and it is recommended to feed evenly.

The characteristics of the material, such as the material is easy to absorb moisture, it is necessary to control the on-site temperature, and different use environments also have an impact on the screening effect.

The size of the mesh according to the diameter of the screen will be better judged by the number of suitable mesh screens.

The angle of the eccentric hammer of the motor will also affect the screening effect, which needs to be determined according to the characteristics of the material.

In short, there are many factors that will affect the screening effect, especially when ordering and reflecting problems, you need to provide as much on-site information as possible in order to better recommend models and solve problems for you.

High-service machinery.

The length and width of the sieve surface, the length affects the screening accuracy, the longer the screening accuracy, the higher the screening accuracy, but there are also limits. The width affects the screening output, the wider the higher the output, but too wide will affect the sieve structure.

The pore size and sieving rate of the screen. The larger the sieve hole, the greater the output, and the higher the sieve rate, the greater the output. In addition, the model and excitation force of the motor will also affect the screening effect, so you can consult the professional calculation of Gaofu.

If it is said that the influencing factors on the screening effect are:

Whether the excitation force design is reasonable.

The length of the grid affects the screening accuracy.

Whether the screen is standard or not affects the particle size.

Changes in the properties of the material.

There are two main factors that affect the output and screening efficiency of linear vibrating screen, one is the nature of the material, and the other is the nature of the screen surface.

The properties of the material mainly include shape, moisture content, bulk density and easy sieving particles. When the shape of the material is spherical, the screening efficiency of the material is greater; When the moisture content of the material is high, the wettability is good, and the adhesion is good, the material is easy to agglomerate, which will lead to the agglomeration of the material and reduce the screening efficiency of the vibrating screen; If the bulk density of the material is larger, the screening capacity of the vibrating screen is also better; The more easily sievable particles contained in the material, the easier it is for the material to be screened, and the higher the screening efficiency of the vibrating screen.

In addition to the nature of the material, the screen surface properties of the vibrating screen will also affect the screening efficiency. Generally speaking, the opening rate of the screen surface, the shape of the screen hole, the size of the screen surface, and the inclination angle of the screen surface will affect the screening efficiency of the vibrating screen.

The opening porosity is the ratio of the sieve area to the sieve surface area, the larger the opening ratio, the higher the screening efficiency of the vibrating screen; When screening materials, pay attention to the shape of the materials when selecting the shape of the screen holes of the vibrating screen, and the higher the screening efficiency of materials with similar shapes; The aspect ratio of the screen surface of the vibrating screen should be within a suitable range, usually between, too small or too large will affect the screening efficiency of the vibrating screen; The inclination angle of the screen surface of the vibrating screen is generally between 0 25°, and the screening efficiency of the vibrating screen is the highest at this time.

In order to improve the screening efficiency of the vibrating screen, it is necessary to evenly and continuously feed along the screen surface when using the vibrating screen, so as to avoid adding too much or too little material at one time; To improve the opening rate of the sieve plate, the sieve plate welded by stainless steel can be selected; Adjust the feeding mode of the vibrating screen, make full use of the screen surface, and appropriately adjust the inclination angle of the vibrating screen; When screening materials, it is necessary to strictly control the moisture content of materials, and a fixed screen can be added at the inlet end.

You're talking about the output of linear vibrating screens, right? Linear vibrating screen is widely used, in many fields have outstanding performance, its output can not be generalized, depending on what kind of material is processed, which model can be used to give the answer.

What is a vibrating screen? What are the uses of vibrating screens? Vibrating screen equipment is an important screening and feeding equipment in the sand making machine production line and the crusher production line, which not only has the role of material screening, but also has the role of feeding and conveying materials in a short distance.

See the vibrating screen equipment has linear vibrating screen and circular vibrating screen, they are the use of motor vibration principle to achieve the screening of materials, how to calculate the working capacity of the vibrating screen machine, usually can be referred to from three aspects, such as the nature of the material, the configuration process of the screening machine equipment, operating factors and other conditions are the effective basis and reference to measure the working capacity of the vibrating screen equipment. The influence of material properties on the production capacity of vibrating screensWhat is the nature of materials? The nature of the material can be divided into material particle size, material humidity, material viscosity, material particle shape, etc., when the material particle size is smaller than the proportion of fine particles in the screen mesh mesh pores, that is, easy to sieve components, easy to be screened out, so compared with those materials that are not easy to be passed through the sieve hole due to large particles, the finer the particle size of the material, the higher the production capacity and output per unit time.

The greater the humidity of the material on the vibrating screen treatment of the material, the greater the viscosity of the material, the material is easy to form a sticky clump with each other, resulting in the blockage of the sieve hole, it is not easy to be screened, the production efficiency decreases, and its working capacity is low, and the smaller the viscosity of the material, the easier it is to be screened, and the higher the production efficiency. The influence of material particle shape on production energy The shape of material particles also has an impact on production capacity, if the shape of the material is close to the shape of the sieve hole, the more circular the shape of the material, the easier it is to be screened through the screen air, usually different material shapes such as strips, plates, flakes and round material particles are not easy to be screened, the different shape of the sieve hole has different adaptability to the material, and the more different the screening production efficiency and performance of the working capacity. The screen surface material of the vibrating screen is different and affects the different configuration processes of the vibrating screen, usually the screen surface material has steel rods, steel wires, punched steel plates, rubber, polyurethane, etc., which have unfair work efficiency, and the different wear resistance of the screen surface will also affect its working ability; The shape of the sieve hole is different, for example, the sieving capacity of the strip screen is greater than that of the sieve hole shape of other properties; The size of the sieve hole configuration is different, and the particle size of the material has a great impact, but the particle size of the material must be, the larger the size of the sieve hole, the stronger its working capacity; The motion trajectory of the vibrating screen, the vibration trajectory of the circular vibrating screen is circular, and the linear vibrating screen does linear motion, and the screening efficiency of the movement trajectory is also different.

The impression of human factors on the production capacity of the equipment is that the feeding and flow of the material are not less, and the probability of blocking the material is greatly reduced, and the feeding of the material changes greatly, and the working vibration frequency of the vibrating screen has not been adjusted accordingly, it is easy to plug the material, the screen is worn and other problems, and the working capacity is greatly reduced.