Vibration frequency, screen inclination of the vibrating screen

Vibration characteristics include vibration frequency, amplitude, vibration direction angle, and screen inclination. If these parameters are set incorrectly, it will affect the working efficiency of the vibrating screen. The correct way is:

1. Screen angle α The angle between the screen surface and the horizontal plane is called the screen angle. The size of the dip is closely related to the throughput of the screening equipment and the screening efficiency. When the inclination angle is increased, the throwing strength of the material on the sieve will be increased, so that the forward movement speed of the material on the sieve surface is accelerated, so that the treatment amount of the vibrating screen is increased, but the residence time of the material on the sieve surface is shortened, and the opportunity for screening the sieve is reduced. , thereby reducing the screening efficiency. On the contrary, the throughput is reduced and the screening efficiency is improved. In order to control the screening efficiency of the vibrating screen to a relatively ideal range, the screen inclination angle of the circular vibrating screen is generally between 15-25°, and the screen inclination angle of the linear vibrating screen is between 0 and 8°.

2. The angle between the vibration direction angle β vibration direction line and the upper screen surface is called the vibration direction angle. The larger the value of the vibration direction angle is, the shorter the distance moved by the material is, and the slower the movement speed of the material on the screen surface, the material can be fully sieved, thereby obtaining a larger screening efficiency. The smaller the value of the vibration direction angle is, the farther the material throws and advances each time. The faster the material passes through the screen surface, the higher the processing capacity, but the material cannot be fully sieved. Therefore, the vibration direction angle should be reasonably selected. For difficult-to-screen materials, the vibration direction angle should be taken as a large value. For easy-screen materials, the vibration direction angle should be small; in general, the vibration direction angle of the circular vibrating screen is 90°. The vibrating direction angle of the linear vibrating screen ranges from 30 to 60°, often 45°. This value not only has good performance for various screening but also obtains the best moving speed and high productivity.

circular vibrating screen inclination

circular vibrating screen

3. The amplitude A amplitude increases, the mesh plugging phenomenon will be greatly reduced, and it is also conducive to the stratification of materials. However, too large amplitude is also destructive to the device. The choice of amplitude is based on the particle size and nature of the material being screened. In general, the larger the vibrating screen size, the larger the amplitude selected. When the linear vibrating screen is used for classification, the amplitude is slightly larger; when used for dehydration and deliming, the amplitude should be smaller. When the particle size of the treated material is large, the amplitude should be correspondingly increased; when the particle size of the treated material is small, the amplitude should be smaller. Usually, the amplitude of the linear vibrating screen is A=3.5~6mm.

4. The increase of vibration frequency ω vibration frequency can increase the number of times the material beats on the screen surface, which increases the probability of material permeability. This is helpful for speeding up the material screening speed and improving the screening efficiency, but it is too high. Reduce the life of your equipment. For larger particle sizes, use larger amplitudes and lower frequencies; for finer particles, use smaller amplitudes and higher frequencies.

Related Articles

Reasons and solutions for the breakage of the vibrating screen

The more likely the linear vibrating screen is to appear in various faults during operation, the cracking of the screen plate and the breakage of the beam after the vibrating screen has been used for a long time, it is necessary to find the "cause" of the problem. During the use of the vibrating screen, the correctness of the operation method and the importance of regular cleaning and maintenance usually avoid the occurrence of the vibration screen failure frequency. Vibrating screens are designed to bring efficient results to the production process. The selection of the material of the vibrating screen itself; the calculation of the vibrating motor; the selection of the screen; whether the structural design of the fuselage conforms to the work on site, can select high-quality screening equipment with high efficiency and precision. So find out the cause…

Linear or circular vibrating screen, what is the difference

Circular vibrating screens and linear vibrating screens are common screening equipment in industrial production. However, their working principle is different from that of suitable materials. When selecting vibrating screens, according to the type of materials to be screened, The particle size is chosen to suit the vibrating screen. If a large volume is required, but a circular vibrating screen is selected, the result will not be as expected. First, the characteristics and working principle of the two screening equipment are analyzed. Linear motion vibrating screen working principle When the linear vibrating screen is working, the trajectory of any point on the screen box is a straight line, that is, when the eccentric block rotates, only one force is generated in a certain direction. Then the vibrating screen only performs a linear motion of the plane reciprocating in this direction. The…

trommel screen for coal washing

Trommel screen maintenance manual

During the use process, the trommel screen runs slowly and evenly, with small impact vibration, stable operation and simple installation. It can be placed directly on a flat floor or floor and under the silo. The machine is easy to close and collect dust, has small maintenance, simple maintenance and long service life. Trommel screens are equipment commonly used in refractory materials, coal, river sand classification, and sand block classification. Do a good job of equipment maintenance to keep the drum screen in a good working condition and delay the service life of the equipment. watch trommel screen working videos Trommel screen maintenance Use the drum screen to do the part of the equipment reducer and support the lubrication of the bearing parts. The grease used in the roller screen bearing part is calcium-based grease, and the lubrication of the…

Requirements for oil frac sand

What is frac sand? Fracturing sand is high-purity quartz sand with superior pressure resistance and high roundness. This substance is artificially crushed and used mainly in the petroleum industry. Especially in the application of hydraulic fracturing, the high-pressure water pump is used to inject the fracturing fluid into the oil and gas reservoir, and the reservoir is crushed to obtain oil and gas resources. Fracturing sand is an indispensable substance. Most of the silica sand comes from high-purity quartz sandstone, but there are also some substitutes for quartz sand, such as ceramsite and metal particles. When fracturing, the fracturing of wells generally uses fracturing sand with a particle size of 400-800 um. Natural quartz sand (600/300μm, 425/212μm). Requirements of silica sand on size, grade The oil frac sand is filled with the high pressure solution into the formation and filled in…

Previous:
Next:

First Rate Service
FAQ
Product Knowledge
Service Network
Privacy Policy
Spare Parts