elliptical vibrating screen with two moving excitation axes

Elliptical vibrating screen is different from the classic synchronous gear transmission structure. The modern elliptical vibrating screen adopts two independent exciters to realize self-synchronous operation, which is not only simple in structure, but also greatly reduces the complexity of maintenance. It is suitable for the treatment of medium and fine grains, humid, viscous and other difficult-to-screen materials.

Features of elliptical vibrating screen:

1. Compound movement track: The material on the screen surface realizes the compound effect of throwing and sliding under the elliptical track, which helps the material stratification and permeability screening.
2. Independent excitation system: The upper and lower two exciters are staggered, which improves the convenience of maintenance and avoids mutual interference of transmission parts.
3. Compact structure, flexible layout: Can be installed horizontally or with a 5° tilt, adapting to different space layout requirements.
4. Strong anti-sticking ability: Especially good performance for complex materials with mud, high water content, or viscosity.
5. Modularized screen surface design: Screen mesh can be easily replaced to adapt to different particle size requirements.
6. Finite element structure design: Uniform force on the screen body, stable and reliable long-term operation.

Advantages of elliptical vibrating screen:

1. Screening efficiency increased by more than 25%: Compared with the same specification linear sieve, elliptical movement can effectively extend the residence time of the material on the screen surface and improve the screening rate.
2. Wider adaptability: Especially suitable for ores, construction aggregates, sand and gravel containing a high proportion of fine particles, large amount of mud and other challenging scenarios.
3. Simple maintenance: No synchronous gear structure, the use of self-synchronization principle, the shaker does not need regular synchronization adjustment, low failure rate.
4. Good noise control: Vibration running smoothly, the overall noise during operation is low, conducive to environmental protection and operational comfort.
5. High-strength materials and rubber-coated process: Effectively resist wear and impact, extending the service life of the equipment.

Working principle of elliptical vibrating screen:

The elliptical vibrating screen uses two exciters placed at the bottom of the screen body, staggered front and back. These exciters, equipped with unbalanced eccentric blocks, generate eccentric force, forming an elliptical synthetic vibration track.
During operation:

1. The exciter produces a periodic elliptical trajectory to promote the movement of materials.
2. The material on the screen surface is constantly thrown up, down, and rolling, moving forward under elliptical force.
3. Fine-grained materials quickly pass through the sieve holes, while larger particles continue to be transported forward, achieving classification screening.
4. The direction, frequency, and amplitude of the elliptical movement can be adjusted by the installation angle of the shaker and electric control system, to meet different screening requirements. Compared with single linear or circular motion, elliptical motion is more suitable for wet, complex materials that are prone to screen blockage.

Application areas of elliptical vibrating screen:

1. Mining and quarry:
   • Classification process after ore crushing;
   • Screening of quartzite, granite, iron ore and other minerals containing mud and water;
   • Screening of fine materials in mechanism sand production line.
2. Construction material field:
   • Screening of construction waste and concrete recycling materials;
   • Grading of road surface base material and gravel aggregate.
3. Coal and energy industry:
   • Coal washing plant wet coal screening;
   • Coal powder, coal gangue and other fuel materials separation.
4. Environmental protection and resource reuse:
   • Screening of available aggregates in municipal waste;
   • Waste slag, slag, tailings and other solid waste resources recycling screening.