Banana Screen: An Advanced Self-Synchronizing Heavy-Duty Equal-Thickness Screen

The banana screen is a self-synchronizing heavy-duty equal-thickness screen characterized by its banana-shaped screening box and box-shaped beams. The transmission system of this vibrating screen operates via a motor that transfers power through pulleys and V-belts, further transmitted by a universal joint to the exciters, which are interconnected by an intermediate drive shaft. Widely utilized in coal classification, desliming, dewatering, and de-mediuming, it also excels in screening and processing large volumes of materials in mining operations. Our company's banana screen, compared to traditional screens of the same size, boasts a significantly higher capacity, achieving 1.5 to 2 times the throughput per unit area, making it a highly cost-effective vibrating screen solution.

I. Advantages of Banana Screen

1. Compact Structure with High Rigidity and Strength: Features a simple yet robust design with even stress distribution and high safety factors.
2. Optimized Vibration Parameters: Avoids resonance by carefully setting vibration parameters away from the screen's natural frequencies.
3. Long Service Life: Screen body lifespan up to 10 years, with exciter service life exceeding 60,000 hours.
4. Efficient and Lightweight: Minimal power consumption coupled with high vibration intensity (9-12mm) ensures a screening efficiency greater than 95%.
5. Brand-Name Screen Surface: Enhances screening efficiency and material handling capacity.
6. Low Noise Operation: Noise level below 75 dB, ensuring smooth and quiet functioning.
7. Continuous 24-Hour Operation: Designed for S1 duty cycle, ensuring stable performance around the clock.
8. Advanced Analysis Tools: Utilizes FF frequency analyzer for frequency response and dynamic analysis.
9. Versatile Models: A comprehensive range to cater to diverse material properties and processing volumes.
10. Easy Maintenance and High Value: Simple operation, safe usage, cost-effectiveness, ample spare parts, and prompt after-sales service.

II. Working Principle of Banana Screen

The banana screen, an enhanced version of vibrating screens, incorporates a multi-angled screen surface starting at 34° and gradually descending to approximately 10° at the discharge end. This design ensures a consistent ratio of material volume to flow velocity across the screen, maintaining a uniform bed depth. This enhances screening efficiency, particularly for materials rich in fine particles, enabling the banana screen to process 1-2 times more material per unit area compared to conventional screens. The improvement is particularly notable when screening particles finer than half the mesh aperture.

III. Comparison Between Banana Screen and Linear Screen

1. Structural Differences:
   • Banana Screen: Curved screen surface resembling a banana, with a radius of 150-600mm, facilitating smooth material flow and reducing blockage.
   • Linear Screen: Flat screen surface composed of rectangular or square meshes, relying on linear motion for material movement and screening.
2. Vibration Modes:
   • Banana Screen: Achieves complex vibration through a flexible support structure, enhancing material flow and reducing adhesion.
   • Linear Screen: Utilizes two perpendicular motors for horizontal and vertical vibrations, resulting in simple linear motion.
3. Vibration Effects:
   • Banana Screen: Curved design promotes efficient material circulation, minimizing accumulation.
   • Linear Screen: Material flow relies on straightforward movement, prone to accumulation at corners.
4. Screening Efficiency:
   • Banana Screen: Ideal for sticky or wet materials due to self-cleaning capabilities.
   • Linear Screen: Efficient for dry materials but less effective with wet materials due to accumulation.
5. Application Scope:
   • Banana Screen: Primarily used for fine classification of materials like coal, ore, and peat with high moisture or viscosity.
   • Linear Screen: Suitable for coarse and fine grading of solid granular materials like metal ores, stones, and industrial raw materials.

IV. Amplitude Range of Banana Screen

The amplitude of a banana screen varies based on design and application requirements. Generally:

• Small-scale Banana Screen: Amplitude ranges from 3-5mm, often used in laboratories or small-scale processing.
• Medium-sized Banana Screen: Amplitude within 5-8mm, common in industrial applications.
• Large-scale Banana Screen: Amplitude can reach 8-15mm, designed for handling large volumes of material.

The specific amplitude should be determined based on material properties, screening requirements, and processing capabilities, in consultation with the manufacturer or engineer to ensure optimal screening performance.