Banana screen, also known as linear equal-thickness vibrating screen, is named because its screen box looks like a banana. As a kind of self-synchronized heavy-duty equal-thickness screening equipment, its screen beam adopts box-type beam structure, and the transmission system transfers the motor power to the exciter through belt pulley and V-belt, and then connects the intermediate transmission shaft through universal coupling to realize the synchronous operation of the left and right exciters. This equipment is not only widely used in coal classification, desliming, dewatering and de-bias scenarios, but also assumes the heavy responsibility of screening and processing in large-scale mining operations.

Compared with the traditional screen machine of the same specification, the banana screen has a processing capacity of 1.5-2 times per unit area, which makes it the core equipment for high-capacity screening scenarios.

Banana Screen Design and Components

Sieve body

The sieve body consists of side gangs, cross beams, vibration beams, lifting beams and back boards, etc. It adopts the design of single-decked sieve body, and all the components are made of high-quality structural steel.

All parts are made of high-quality structural steel. The crossbeam and vibration beam are heat-treated after welding and processed by advanced CNC machine tools to ensure the dimensional accuracy.

The screen body assembly adopts ring groove bolts and clean sealing process, the side plate is designed without welded seam, and the cross beam and vibration beam have large support coefficient and high rigidity.

The surface treatment reaches Sa2.5 grade and then sprayed with polyester protective paint, and the beams are additionally coated with wear-resistant grease, which provides excellent fatigue resistance under high-frequency vibration conditions.

Shaker

The shaker adopts special vibration bearings and high-precision gear box, which has the advantages of light structure, good sealing, low noise, easy maintenance and so on. By setting multiple plugs to be filled by the pendulum block, the eccentric torque can be flexibly adjusted to meet the needs of different vibration indexes.

The design of the oil drift plug can adsorb iron filings in the gear lubricating oil, and together with the high-grade lubricating oil of the world's famous brand, it can realize stable operation under the environment of - 30℃ to + 80℃.

Transmission system

1. intermediate shaft: rigid shaft structure, connected to the left and right shakers through flexible rubber disk coupling, to achieve maintenance-free, lubrication-free synchronous rotation;
2. drive shaft: universal coupling is adopted to connect the drive mechanism and screen body, which is wear-resistant and has a long service life;
3. motor and belt drive: new type motor with high starting torque, matched with SPB belt drive system, the belt tension is adjusted by screw to ensure the efficiency of power transmission.
4. buffer spring: steel helical compression spring with rubber cushion, vibration damping efficiency of over 98%, reduce the foundation dynamic load and operating noise. 5. screen plate: polyurethane combination with rubber cushion;
5. screen plate: polyurethane combination screen plate with high pore rate, anti-clogging, screening efficiency reaches the international leading level, easy to disassemble and strong durability.

How Banana Screen Work

Power transmission and vibration generation

After the motor is started, the speed is regulated by the belt drive, and the driving force is transmitted to the main driving shaft through the sub-shaft vice, which drives the vibration exciter to generate linear vibration force at an angle of 45° with the horizontal direction.

The vibration force is continuously applied to the screen body, which vibrates back and forth on the cushion springs, which at the same time reduce the dynamic load of the screen body on the support base.

Application of the principle of material screening and equal thickness

The screen body drives the screen surface to vibrate synchronously, and the material is thrown up and then advances in layers, completing the classification according to the particle size through the screen holes.

The core advantage of the banana screen is “equal thickness screening” - due to the different inclination angle of each section of the screen surface, the thickness of the material layer is basically equal from the feed end to the discharge end, ensuring that the fine particles are in full contact with the screen surface, and greatly improving the screening efficiency.

The material is continuously input after buffering by the feed chute, and the under-screen material and the over-screen material are discharged through the lower and discharge chutes respectively, forming an efficient and continuous screening process.

The Characteristics and Advantages of Banana Screen

High processing capacity and screening efficiency

Innovative multi-slope design greatly expands the screening area, compared with the traditional sieve machine, the processing capacity per unit area is increased by 1.5-2 times.

Whether it is wet and sticky materials or dry and loose particles, by precisely adjusting the inclination angle of the screen surface, the materials can be efficiently stratified, accelerating the rapid separation of fine particles, and guaranteeing the consistency of product quality from the source.

Anti-clogging and low vibration design

The unique inclined screen structure significantly reduces the risk of material jamming and sticky clogging, and with the curved profile design, the vibration load is evenly distributed, effectively relieving the dynamic stress of the structure. At the same time, the design significantly reduces operating noise, creating a quieter production environment for operators.

Versatile and customizable

Banana screens are used in a wide range of industries: from primary and fine screening of ores in mines, to glass/plastic sorting in recycling plants, to fine grading of grains in the food industry. By flexibly adjusting the angle of the screen surface and the number of decks, and by combining the screen surface with polyurethane panels and other materials, the screen can accurately match the characteristics of all kinds of materials and the requirements of complex working conditions.

Energy-saving and environmental protection double performance

Equipped with high-efficiency exciter, significantly reducing energy costs; through the installation of screen cover, can effectively inhibit the escape of dust, in order to improve production efficiency at the same time, in strict compliance with environmental protection standards, to achieve the dual goals of economic efficiency and green production.

Application Scenarios of Banana Screen

Mining and Quarrying Industry

In the fields of iron ore, coal mine and aggregate production, banana screen, as the key equipment for ore classification, shoulders the important task of screening materials after coarse crushing. It can comfortably cope with the continuous processing of large particle size and high hardness materials, showing strong applicability and stability.

Recycling and Waste Management

In glass, plastic and metal recycling plants, the banana sifter's high throughput and accurate screening performance dramatically increase the efficiency of sorting recyclable materials. Through efficient screening, it promotes the process of waste minimization and provides solid technical support for resource reuse.

Food & Agro-Processing

The banana sifter uses a gentle and efficient screening method to classify agricultural products such as grains, seeds, fruits and vegetables. This unique screening action not only ensures accurate grading, but also avoids damage to fragile materials, strictly guaranteeing food-grade production standards and safeguarding the quality of agricultural products.

Chemical & Pharmaceutical

The anti-clogging design of the banana screen plays a key role in the processing of fine powders and granular materials, ensuring the continuous and stable operation of the equipment. With its high-precision screening capacity, it perfectly meets the stringent requirements of chemical raw materials screening and pharmaceutical intermediates classification, and has become an indispensable technical equipment in this field.

How to Choose Banana Screen for Mining

Material Characterization

Particle size distribution: for small particles, high precision screen plate design is required; for mixed particle size materials, single/double screen body combination can be used to realize grading and screening.

Moisture and viscosity: when handling high moisture or viscous materials, it is recommended to prioritize the use of polyurethane screen panels to effectively reduce the risk of screen hole clogging.

Processing capacity and capacity planning

According to the hourly tonnage processing demand, accurately match the screen surface size specifications. Multi-deck screen body is suitable for large-scale continuous operation, while single-deck screen body is more flexible and economical, suitable for small and medium-sized production needs.

Adaptation strategy for working conditions

Considering the operating temperature, dust concentration and installation space limitations: such as open pit mines and other harsh environments, the screen body needs to be strengthened to prevent corrosion and rust; indoor operation needs to optimize the sealing structure, to achieve high efficiency of dust control.

Maintenance and Durability Design

Adopts a modular quick-disassembly screen deck structure with maintenance-free intermediate shafts and other core components, significantly reducing the operation and maintenance costs, and greatly extending the life cycle of the equipment.

Maintenance of Banana screen

Fasteners and Vibrating Motor Inspection

Establish a standardized inspection mechanism, and regularly carry out fastening operations on the sieve body bolts and shaker connectors. Real-time monitoring of vibration motor operating parameters, if there is an abnormal temperature rise or abnormal noise, you need to immediately start the shutdown maintenance program to ensure the safe and stable operation of the equipment.

Screen cleaning and lubrication management

Implement strict screen maintenance procedures, and clean up the residual material of the screen plate in time after the end of each shift to prevent the screen holes from clogging and affecting the screening efficiency. According to the manual of the equipment, regularly add special lubricating oil to the bearings and transmission parts, and synchronously check the smoothness of the lubrication system pipeline to ensure that the moving parts are effectively lubricated.

Long-term storage and antirust treatment

During the idle period of the equipment, it should be stored in a dry and ventilated environment. The surface of the screen body should be evenly coated with anti-rust grease to form an effective protective layer; the spring parts should be properly placed to avoid deformation under pressure, so as to maximize the long-term stability of the performance of the equipment through scientific storage management.

Conclusion

From structural innovation to functional expansion, banana screen has become the core equipment of mining, environmental protection, food and other industries with its equal-thickness screening principle and high reliability design.

With the advantages of large capacity, high efficiency and low maintenance cost, it not only meets the harsh demands of current industrial production, but also lays the foundation for future intelligent screening scenarios.

Whether it is to optimize the efficiency of the existing production line, or to explore new material processing solutions, banana screen are customized solutions to create sustainable value for users in various fields.