Structure and characteristics of ultrasonic vibrating screen

Improve the flattening (light contact between powder and the mesh port) and slip effect of low-density powder in gravity sedimentation, improve the retention or wedge of high-density metal in the mesh port, and improve the adhesion effect of electrostatic powder, so as to improve the screening efficiency and screening quality. Expressed by the screening pass rate, in general, the pass rate is increased by 50%-400% compared with the non-ultrasonic vibrating screen.

1.It can achieve high-precision, high-mesh screening while controlling a narrow range of particle sizes.

2.It can be used in both single and multi-layer, and one intelligent ultrasonic generator can use three transducers at the same time.

3.Thorough screen self-cleaning function: more than 325 mesh screening, no mesh blockage, no screening efficiency attenuation.

4.It truly solves the screening problems of strong adsorption, easy agglomeration, high electrostatic, high precision, high density, light specific gravity and so on.

5.The properties of the material being handled are guaranteed to remain unchanged.

6.The screening accuracy can be increased by 1-100%, and the output can be increased by 1-8 times.

The ultrasonic vibrating screen converts 220V, 50Hz or 110V, 60Hz electric energy into 18KHz high-frequency electrical energy, inputs it into an ultrasonic transducer, and turns it into 18KHz mechanical vibration, so as to achieve the purpose of efficient screening and screen cleaning, making ultra-fine powder screening easy. Based on the traditional vibrating screen, the system introduces a low-amplitude, high-frequency ultrasonic vibration wave (mechanical wave) on the screen to improve the screening performance of ultra-fine powders. It is especially suitable for users of high value-added fine powders.

Features Improve the flattening (light contact between powder and the mesh port) and slip effect of low-density powder in gravity sedimentation, improve the retention or wedge of high-density metal in the mesh port, and improve the adhesion effect of electrostatic powder, so as to improve the screening efficiency and screening quality. Expressed by the screening pass rate, in general, the pass rate is increased by 50%-400% compared with the non-ultrasonic vibrating screen.

Since the ordinary vibrating screen can only screen particles below 200 mesh, for 200-600 mesh particles, only a higher vibration frequency is adopted. The frequency of ultrasonic vibrating screen can be from 20kHz to 60kHz, which has a good effect on the sieving of tiny particles.

Ultrasonic vibrating screen.

Features: Automatically scan the local oscillator frequency of the transducer, dynamically adjust the frequency of the vibration source, and adopt PID control algorithm, which is fast and accurate, so that it always works at frequency and current, which greatly improves the production capacity. At the same time, for some materials that are difficult to screen, such as:

Easy agglomeration, strong adsorption, electrostatic, etc.

Structural composition: dust cover, upper frame, bottom frame, ultrasonic transducer, ultrasonic power supply, vibrating body, shock absorbing spring, anchor bolts, sockets, etc., the following is attached to the structural drawing

1. The larger the mesh, the finer the particle size of the material; The smaller the mesh, the larger the particle size of the material. The sieving particle size is the size of the mesh that the particles can pass through the screen, 1 square inch (the number of mesh holes in the area is called the mesh). The specifications of the standard sieves in various countries are not the same, and the commonly used Taylor system is based on the number of holes per inch long as the sieve number, which is called the mesh.

Second, Jian Peihong, plus or minus before the number of meshes:

It indicates whether the mesh of the mesh number can be missed. A negative number indicates that the mesh can be leaked through that mesh, that is, the particle size is less than the mesh size; A positive number indicates that the mesh cannot be missed, that is, the size of the particle is larger than the mesh size.

For example, the particles are -100 mesh + 200 mesh, that is, these particles can leak from the 100 mesh but can not leak from the 200 mesh mesh, when screening the particles of this mesh, the large mesh (200) should be placed under the screen of the small mesh (100), and the screen left in the large mesh (200) is -100 + 200 mesh particles.

Working principle of vibrating screen:

The process of dividing groups of crushed bulk materials with different particle sizes into several different levels through a single or multi-layer screen surface with uniform holes is divided into several different levels. Particles larger than the sieve hole remain on the sieve surface, which is called the sieve material of the sieve surface, and particles smaller than the sieve hole pass through the sieve pores, which is called the sieve material of the sieve surface. The actual screening process is:

After a large number of broken bulk materials with different particle sizes and coarse and fine mixtures enter the screen surface, only a part of the particles are in contact with the screen surface, due to the vibration of the screen box, the material layer on the screen is loosened, so that the gap between the large particles is further expanded, and the small particles take the opportunity to pass through the gap and transfer to the lower layer or the conveyor. Due to the small gap between small particles, large particles cannot pass through, so the original chaotic arrangement of particles is separated, that is, it is layered according to the size of the particles, forming a small particle at the bottom, coarse particles at the top of the arrangement rule. The fine particles that reach the sieve surface are smaller than the sieve holes, and finally realize the separation of coarse and fine grains and complete the screening process.

However, adequate separation is not possible, and during sieving, a portion of the sieve material is generally left in the sieve material. When the fine particles are screened, although the particles are smaller than the sieve holes, the difficulty of their sieving is different, and the particles with similar size of the materials and sieve holes are more difficult to sift, and it is more difficult to pass through the particle gap in the lower layer of the sieve surface.

Working characteristics of vibrating screen:

The block eccentricity is used as the excitation force, and the excitation force is strong.

The sieve beam and the sieve box are made of high-strength bolts, which is simple in structure and convenient and fast in maintenance;

Tire coupling, flexible connection, smooth operation;

The structure of small amplitude, high frequency and large inclination angle is adopted, which makes the machine have high screening efficiency, maximum processing, long life, low power consumption and low noise.

According to the structure and working principle of the screening machinery, there are roughly the following categories:

1. The working surface of the roller screen is composed of rolling shafts arranged horizontally.

2. The working surface of the roller screen is composed of rolling shafts arranged horizontally. The fixed screen The working part is fixed, and the material is screened by sliding along the working surface. The fixed grid screen is one of the most widely used in concentrators, and is generally used for pre-screening before coarse or secondary crushing.

It has a simple structure and is easy to manufacture. It does not consume power, and the ore can be directly unloaded onto the screen surface. The main disadvantage is low productivity and low screening efficiency, generally only 50-60%.

3. The body of the plane motion screen is a plane swing or vibration. According to its planar motion trajectory, it is divided into linear motion, circular motion, elliptical motion and complex motion. Shaking screens and vibrating screens fall into this category.

There are many kinds of vibrating screening, mainly fine and mining.

It is said that the working principle of a fine rotary vibrating screen commonly used: the upright motor is used as the excitation source, and the upper and lower ends of the motor are equipped with eccentric hammers, which transform the rotary motion of the motor into horizontal, vertical and inclined three-dimensional motion, and then transmit this movement to the screen surface. Adjusting the phase angle of the upper and lower ends can change the movement trajectory of the material on the screen surface.

The principle of different vibrating screens is different, but basically the vibration motor is used as the excitation source, and the equipment generates amplitude in the vibration process to drive the material to move on the screen surface to achieve the purpose of screening.

Mud vibrating screen is also known as oil.

Drilling fluid vibrating screen, drilling mud vibrating screen, mud vibrating screen, oil vibrating screen, mud linear vibrating screen, etc., mud vibrating screen is widely used in the field of oil drilling, it is the first stage of mud solid control and mud purification treatment equipment of drilling mud solid control system, and it is also one of the most important solid control equipment in the drilling mud purification system, which is used to separate the large particles of drill cuttings contained in the drilling fluid, and the treated drilling fluid containing smaller particles can enter the next level of solid control equipment for further processing. The powerful excitation force of the output of the amphibiotic screen has obvious advantages in the treatment of large-displacement drilling fluids, and has been widely used in the fields of oil drilling mud solid control system, trenchless horizontal directional crossing mud purification system, shield slurry separation system, urban construction piling mud purification and separation, and oilfield environmental protection waste separation and control technology by efficiently and quickly removing a large number of solid phases.

The working principle of ultrasonic vibrating screen.

The ultrasonic vibrating screen is to convert 220V, 50Hz or 110V, 60Hz electric energy into 18KHz high-frequency electric energy, through the ultrasonic power supply input ultrasonic cleaning transducer, turning it into 18KHz mechanical vibration, these fluctuations are transmitted to the pre-adjusted rod resonator, and then evenly transmitted to the sieve surface, so that the ultra-fine powder accepts huge ultrasonic acceleration, thereby inhibiting adhesion, friction, flattening, wedge and other network blocking factors, and improving screening efficiency and screen cleaning efficiency. To achieve the purpose of efficient screening and net clearing, making ultra-fine powder screening easy. It is especially suitable for users of high value-added fine powders.

With the further development of China's economic construction and scientific research, new uses of vibrating screens will continue to appear, and their use in various departments will also increase, and will play an increasingly important role. Summarizing the long-term systematic research and experiments of Professor Wen Bangchun on the technology and equipment theory of vibration and wave utilization, the theoretical basis for many branches of vibrating screen utilization engineering (such as the application of vibration synchronization and control synchronization theory, the utilization of nonlinear vibration, the utilization of wave and wave energy, etc.) has been created.

The vibrating screen works by using the complex rotation vibration generated by the oscillator excitation. The upper rotating weight of the oscillator makes the screen surface produce plane gyratory vibration, and the lower rotating weight makes the screen surface produce cone rotary vibration, and the effect of its combined action makes the screen surface produce compound rotation vibration. Its vibration trajectory is a complex spatial curve.

The curve is projected as a circle in the horizontal plane and an ellipse in the vertical plane. The amplitude can be changed by adjusting the excitation force of the upper and lower rotating weights. Adjusting the spatial phase angle of the upper and lower hammers can change the curve shape of the motion trajectory of the screen surface and change the movement trajectory of the material on the screen surface.

Classification introduction: Vibrating screening equipment can be divided into mining vibrating screens, light fine vibrating screens, and experimental vibrating screens according to their weight uses.

Mining vibrating screen can be divided into: high-efficiency heavy-duty screen, self-centering vibrating screen, elliptical vibrating screen, dewatering screen, circular vibrating screen, vibrating screen (4 sheets), banana screen, linear vibrating screen, etc.

According to the material running track of the vibrating screen, it can be divided into:

According to the linear motion trajectory, it is divided into: linear vibrating screen (the material moves forward on the screen surface).

According to the circular motion trajectory, it is divided into: the structure and advantages of the circular vibrating screen (the material moves in a circular manner on the screen surface).

According to the reciprocating movement trajectory: fine screening machine (the material does reciprocating movement forward on the drying surface).

Vibrating screens are mainly divided into linear vibrating screens, circular vibrating screens, and high-frequency vibrating screens. According to the type of vibrating screen, the vibrating screen can be divided into single-shaft vibrating screen and double-shaft vibrating screen. The single-shaft vibrating screen is to use single unbalanced heavy excitation to vibrate the screen box, the screen surface is tilted, and the movement trajectory of the screen box is generally circular or oval.

The double-shaft vibrating screen is a double unbalanced heavy excitation using synchronous re-rotation, the screen surface is horizontally or gently tilted, and the movement trajectory of the screen box is a straight line. There are types of vibrating screens, such as inertial vibrating screens, eccentric vibrating screens, self-centering vibrating screens and electromagnetic vibrating screens.

1. Gaofu combines ultrasonic and vibrating screen to solve the problem of difficult screening of strong adsorption materials.

2. It solves the problem of clever vertical screening of materials with strong adsorption, easy to hold, strong viscosity, high electrostatic, high density, ultra-fine powder and other characteristics.

3. The screening accuracy can be increased by more than 80%, and the output can be increased by 2 to 5 times.

4. The pollution and wear caused by the conventional screening method to the powder have been changed, and the noise of the sieve machine has been greatly reduced.

V. 50Hz electrical energy is converted into 36KHz mechanical vibration, so as to achieve the purpose of rapid screening and net clearing, making ultra-fine powder screening easy.

1. The circular vibrating screen is mainly composed of a screen box, a screen, a vibrator and a damping spring. The vibrator is installed on the side plate of the screen box and is rotated by an electric motor through a V-belt, which generates centrifugal inertia force and forces the screen box to vibrate. If there are no special requirements, the circular vibrating screen is mainly divided into textile screen surface and perforated screen surface, and all kinds of screen surface can be satisfied.

Main components: 1. a screen box.

2. a supporting seat.

3. a discharge hopper.

4. a feed hopper.

5. a screen. 6. a shaker.

7. Flexible coupling.

8. a motor. 9. a motor base.

Second, the characteristics of the circular vibrating screen: 1

The circular vibrating screen adopts a cylindrical eccentric shaft exciter and a deviation block to adjust the amplitude, which is easy to use and maintain; 2.The circular vibrating screen adopts spring steel braided screen mesh or punched screen plate, which has a long service life and is not easy to plug holes; 3.The circular vibrating screen adopts rubber vibration isolation spring, which has long life, low noise and stable over-resonance area.

3. Applicable industries of circular vibrating screen:

1. Chemical industry: resins, coatings, industrial drugs, cosmetics, paints, traditional Chinese medicine powders, etc.

2. Food industry: powdered sugar, starch, salt, rice flour, milk powder, soybean milk, egg powder, soy sauce, fruit juice, etc.

Metal, metallurgy and mining: aluminum powder, lead powder, copper powder, ore, alloy powder, welding rod powder, manganese dioxide, electrolytic copper powder, electromagnetic materials, grinding powder, refractory materials, kaolin, lime, alumina, heavy calcium carbonate, quartz sand, etc.

3. Pollution treatment: waste oil, wastewater, dyeing and finishing wastewater, additives, activated carbon characteristics.