Working Principle of Ultrasonic Vibrating Screen

The ultrasonic vibrating screen is based on the traditional vibrating screen, and an ultrasonic screening system is added. The system can input 220V/50Hz or 110V/60Hz electricity into the ultrasonic converter and efficiently convert it into 36KHz mechanical vibration energy. High-frequency vibration acts on the screen, with a vibration frequency of up to 36,000 times per second, prompting fine powder materials to form a micro-suspension layer on the screen surface, accelerating the process of material penetrating the screen, and effectively avoiding static adsorption and material adhesion.

The ultrasonic vibrating screen has an automatic net cleaning function, which can achieve the effects of screening and cleaning at the same time during the screening process, effectively improving the production efficiency of difficult-to-screen materials.

How Does an Ultrasonic Vibrating Screen Work?

An ultrasonic vibrating screen works by combining conventional mechanical vibration with high-frequency ultrasonic vibration. The conventional vibrating motor moves the material across the screen surface, while the ultrasonic system generates high-frequency mechanical vibration that is transmitted directly to the screen mesh.

The ultrasonic generator supplies electrical energy to the ultrasonic transducer. The transducer converts this electrical energy into high-frequency mechanical vibration, which is transferred through the ultrasonic resonance components to the screen mesh.

The high-frequency vibration changes the contact conditions between the particles and the screen mesh. For fine powders, it helps reduce particle adhesion, static buildup, and mesh blockage, allowing particles close to the required size to pass through the openings more efficiently.

The screening process can therefore be understood as three main stages:

1. Material feeding: The vibrating screen distributes the material across the screen surface.
2. Ultrasonic vibration: The ultrasonic system generates high-frequency vibration and transfers it to the screen mesh.
3. Particle separation: Fine particles pass through the mesh more efficiently, while oversized particles move toward the discharge outlet.

This combination makes ultrasonic vibrating screens particularly useful for fine powders and high-mesh screening applications where conventional vibrating screens may experience mesh clogging, adhesion, or reduced screening efficiency.

Why Use an Ultrasonic Vibrating Screen?

An ultrasonic vibrating screen is mainly used when conventional screening methods cannot provide stable performance with fine or difficult-to-screen materials. The ultrasonic system helps reduce common problems such as mesh clogging, particle adhesion, static electricity, and material agglomeration.

The main benefits include:

• Improved fine powder screening: Ultrasonic vibration helps fine particles pass through high-mesh screens more efficiently.
• Reduced mesh clogging: High-frequency vibration helps prevent particles from blocking the screen openings.
• Reduced material adhesion: It is useful for powders that tend to stick to the screen surface.
• Better screening stability: The ultrasonic system can help maintain consistent screening performance during continuous operation.
• Suitable for high-mesh screens: It is commonly used for applications requiring fine particle classification.
• Reduced manual screen cleaning: The self-cleaning effect can reduce interruptions caused by screen blockage.

Ultrasonic System structure

• Ultrasonic drive source: equipped with 38KHz high-power high-frequency resonance module, built-in intelligent microprocessor, automatically adapt to and lock the best digital frequency, eliminating manual adjustment and convenient operation. The power supply design ensures that the oscillator runs for a long time with low heat and stable and reliable performance.
• Connection cable: Use high-quality cables to achieve a stable electrical connection between the ultrasonic oscillator and the power module.
• Aviation connectors: Use high-specification aviation-grade connectors to ensure stable signal transmission and easy plugging and unplugging.
• Ultrasonic transducer: High-performance ultrasonic conversion unit, efficient conversion of electrical energy into mechanical vibration energy.
• Resonance grid: carefully constructed by the external frame and the resonance ring to enhance the ultrasonic propagation effect.

Application of Ultrasonic Vibrating Screen

Ultrasonic vibrating screens are specially designed to handle materials with strong adsorption, easy agglomeration, high static electricity, high fineness, high density, and light-specific gravity. Dry powder particle size classification can be up to 25µm or liquid filtration can be down to 10µm. Especially suitable for screening high-quality, fine powders, such as 400 mesh, 500 mesh, and 600 mesh screening silicon carbide, alloy powder, molybdenum powder, stainless steel powder, tungsten powder, nickel powder, nut powder, cobalt powder, powder coating, quartz Powder, bumidone powder, malt powder, ribavirin, coffee powder, electromagnetic powder, negative electrode material, laser powder.  

Features of Ultrasonic Vibrating Screen

• High-precision, high-mesh screening, material screening mesh number >500 mesh.
• Precisely control the particle size range of materials to achieve high-precision screening.
• It can be used in single layer or multi-layer, and a set of intelligent ultrasonic generators can drive three ultrasonic transducers at the same time.
• The screen is self-cleaning and has no mesh clogging, improving screening efficiency.
• Keep the properties of the materials being processed stable.
• It can improve the screening accuracy by 1-100% and increase the output by 1-10 times.

Reduce the Noise of Ultrasonic Vibrating Sieve

Due to the structural characteristics of the ultrasonic vibrating screen, it is normal to produce some noise during operation. However, if the noise is too loud in abnormal situations, it will cause great trouble to the production environment and also affect the production quality. So how to reduce the noise to a normal acceptable range? Please continue reading this article, we will introduce 5 ways to reduce noise.

1. Tighten all parts on the ultrasonic vibrating screen

Tighten all parts on the ultrasonic vibrating screen, especially the screen plate that needs to be replaced frequently, to avoid additional vibration caused by the loosening of individual parts.

2. Motor Plus Soundproof Cover

The screening power source of the ultrasonic vibrating sieve relies on a vibration motor. Adding a soundproof cover outside the vibration motor can isolate the noise generated by the vibrating screen motor and reduce the spread of noise to the outside.

3. Bearing Increased Damping Treatment

Bearings are important components in ultrasonic vibrating sieves that bear vibration loads. Add damping material, such as rubber or foam plastic, to the bearing seat or bearing cap. These materials have good vibration absorption and sound insulation properties, which can reduce the generation and transmission of vibrating screen noise.

4. Add Rubber Plate

Adding rubber plates to the screen frame, side plates, feed inlet, discharge port and receiving bottom plate of the ultrasonic vibrating screen box to effectively suppress the high-frequency vibration of the side panels and reduce radiated noise.

5. Rubber springs replace steel springs

Rubber springs replace steel springs for small ultrasonic vibrating screens to reduce impact.

Amplitude Adjustment of Ultrasonic Vibrating Screen

The adjustment of the amplitude of the ultrasonic vibrating screen affects the screening output and accuracy of the materials. The amplitude adjustment is divided into 3 stages.

1. Low amplitude: It is mainly used for materials that are heavier in proportion to the material and have good fluidity. There is no need to make the material jump very high.
2. Medium amplitude: Mainly used for screening general materials, which can prevent the materials from blocking the network and preventing the materials from jumping too high.
3. High amplitude: It is mainly used on materials with light-specific gravity, very high viscosity, and static electricity to prevent the materials from adhering. The high amplitude of ultrasonic waves can break up the materials, which is more conducive to the screening of materials.

Conclusion

The above content summarizes the working principle of ultrasonic vibrating screen, the structure of ultrasonic system, application materials, characteristics, and how to reduce noise, etc. If you have any questions about ultrasonic vibration screen, please feel free to contact our professional team.

FAQ

1. What is an ultrasonic vibrating screen?

An ultrasonic vibrating screen is a screening machine that combines conventional mechanical vibration with high-frequency ultrasonic vibration. The ultrasonic system transfers vibration to the screen mesh to improve the screening of fine powders and reduce mesh clogging and material adhesion.

2. How does an ultrasonic vibrating screen work?

The ultrasonic generator supplies electrical energy to an ultrasonic transducer, which converts it into high-frequency mechanical vibration. The vibration is transferred to the screen mesh, helping fine particles pass through the openings more efficiently.

3. What materials are suitable for ultrasonic vibrating screens?

Ultrasonic vibrating screens are suitable for fine powders that are difficult to screen, including metal powders, graphite, pharmaceutical powders, food powders, powder coatings, quartz powder, and other materials prone to adhesion, static electricity, or agglomeration.

4. What is the main advantage of ultrasonic screening?

The main advantage is improved screening performance for fine and difficult-to-screen materials. Ultrasonic vibration can reduce mesh clogging, particle adhesion, and static buildup while helping fine particles pass through the screen openings.

5. Can an ultrasonic vibrating screen prevent mesh clogging?

It can significantly reduce mesh clogging caused by fine particles, adhesion, and static electricity. The ultrasonic vibration continuously acts on the screen mesh and helps keep the openings clear during screening.

6. What mesh size can an ultrasonic vibrating screen handle?

The suitable mesh size depends on the material, particle characteristics, screen design, and required separation accuracy. Ultrasonic systems are commonly used for high-mesh and fine-powder screening, including applications requiring several hundred mesh.

7. What is the difference between a conventional vibrating screen and an ultrasonic vibrating screen?

A conventional vibrating screen relies mainly on mechanical vibration to move and separate materials. An ultrasonic vibrating screen adds high-frequency vibration directly to the screen mesh, making it more suitable for fine powders and materials that tend to clog, adhere, or generate static electricity.

8. How do I choose an ultrasonic vibrating screen?

Selection should consider the material type, particle size, required mesh size, feed capacity, moisture content, static electricity, material flowability, number of screening layers, and required screening accuracy. Actual material testing is recommended before final equipment selection.

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