An ultrasonic vibrating screen is a specialized vibrating sieve machine that uses ultrasonic vibrations to improve the screening efficiency of fine powders and particles. Its working principle involves several key components and processes:

1. Ultrasonic Transducer: The heart of the ultrasonic vibrating screen is the ultrasonic transducer. This transducer generates high-frequency mechanical vibrations, typically in the range of 36,000 to 40,000 Hz (cycles per second).
2. Vibrating Screen Mesh: The screen mesh is a sieve-like surface that separates particles based on their size. It is typically made of fine-meshed material.
3. Exciter: The exciter is responsible for generating regular mechanical vibrations in the screen mesh, as in a standard vibrating screen.

Here’s how the ultrasonic vibrating screen works:

1. Standard Vibrations: Initially, the exciter generates standard mechanical vibrations that cause the particles on the screen mesh to move and separate according to their size. Larger particles move to the top layers, while finer particles pass through the mesh.
2. Ultrasonic Vibrations: Simultaneously, the ultrasonic transducer emits high-frequency ultrasonic waves. These waves propagate through the screen mesh and into the material being screened.
3. Particle Agitation: When the ultrasonic waves encounter the particles on the mesh, they create micro-vibrations at a very high frequency. These micro-vibrations cause the particles to become more buoyant and agitate within their respective openings in the mesh.
4. Deagglomeration and Increased Efficiency: The ultrasonic vibrations help to break up particle agglomerations or clusters, ensuring that individual particles have a better chance of passing through the mesh. This process significantly improves the efficiency of separating fine particles, which can be difficult with standard vibrating screens.
5. Higher Throughput and Precision: Due to the deagglomeration and enhanced agitation, the ultrasonic vibrating screen can achieve higher throughput rates and increased screening precision for fine powders and particles.

In summary, an ultrasonic vibrating screen combines standard mechanical vibrations with high-frequency ultrasonic waves to improve the screening efficiency of fine materials. The ultrasonic waves create micro-vibrations that enhance the separation process, making it particularly useful in industries where precision and efficiency in particle separation are crucial.