The vibrating screen consists of a screen body, a vibrator mechanism, a drive assembly and spring suspension units mounted on a frame or support structure.
The screen body is supported by coil springs on which the body can bounce freely. The vibrating motion thus is given by counterweights built on the shaft.
Depending on the location of the shaft, GELEN two bearing inclined screens have two types:
The STE Series inclined vibrating screens use circular motion with a center-mounted shaft for general aggregate sizing, while the ITE Series grizzly screens handle primary scalping of run-of-mine material.
ELTE Series Elvar screens with off center counterweights which provide different stroke patterns on the deck.
The ETE Series Horizontal vibrating screens are of horizontal type screens with triple shaft geared together resulting in horizontal motion. The main advantages of this type of screens are especially when the material is very sticky or flaky they give better results. Also depending on the application, the shape and angle of the horizontal motion can be adjusted.
A vibrating screen is composed of several essential components, including the screen body, vibrator mechanism, drive assembly, and spring suspension units. The screen body is supported by coil springs, allowing it to bounce freely and generate the necessary vibrating motion.
The vibrator mechanism, often equipped with counterweights, creates the motion needed for material separation. The drive assembly powers the system, while the spring suspension units ensure smooth operation and reduce vibrations transmitted to the support structure. Together, these components ensure efficient and reliable screening performance.
Inclined vibrating screens, like the GELEN STE Series, use a circular motion produced by a single shaft mounted at the screen body's center of gravity. The deck sits at 15° to 25°, so gravity helps move the material across the screen — making them ideal for general aggregate sizing, scalping, wet screening, and washing applications. Stroke, inclination angle, and rotational speed are all adjustable.
Horizontal vibrating screens, such as the GELEN ETE Series, generate an elliptical motion from a triple-shaft design. This motion is particularly effective for sticky, wet, or flaky materials, and the low-profile horizontal layout fits installations with limited headroom. For most aggregate screening below 500 t/h, the inclined STE is the right choice; for sticky or fine material the horizontal ETE is better.
Grizzly screens, like the GELEN ITE Series, are specifically designed for heavy-duty applications where large top-size materials are processed. They feature robust frames and top decks equipped with grizzly bars or perforated wear-resistant steel plates, which can withstand the impact of coarse materials.
These screens are commonly used in primary crushing stages to scalp off oversized material before further processing. Their durable construction ensures long-lasting performance, even in the most demanding conditions, making them a reliable choice for aggregate and mining operations.
The ELVAR type screens, such as the GELEN ELTE Series, feature off-center counterweights that create unique stroke patterns on the screen deck. This design allows for more efficient material handling and separation, especially for applications requiring precise screening.
Unlike circular or horizontal screens, ELVAR screens provide a combination of linear and elliptical motions, making them highly effective for specific material types and screening requirements. Their versatility and adaptability make them a popular choice for specialized screening tasks.
Horizontal vibrating screens, like the GELEN ETE Series, offer several advantages, including superior screening efficiency for sticky or flaky materials. The horizontal motion ensures better material separation and reduces blinding or clogging of the screen mesh.
Additionally, the ability to adjust the shape and angle of the horizontal motion allows operators to optimize the screening process for different applications, from scalping to fine screening. These screens are also available in wet screening and washing configurations, making them highly versatile for various industries.
Regular maintenance is crucial for ensuring the optimal performance and longevity of a vibrating screen. Key maintenance tasks include inspecting and replacing worn screen meshes, checking the condition of springs and suspension units, and ensuring the vibrator mechanism is properly lubricated.
It’s also important to monitor the alignment of the drive assembly and tighten any loose bolts or fasteners. By following a consistent maintenance schedule, you can minimize downtime, reduce repair costs, and maintain high screening efficiency.
When selecting a vibrating screen, consider factors such as the type of material to be screened, the desired particle size, and the required throughput capacity. The screen’s motion type (circular, elliptical, or linear) should align with the material characteristics and application requirements.
Additionally, evaluate the screen’s construction, including the frame strength and wear-resistant components, especially for heavy-duty applications. GELEN offers a wide range of vibrating screens, each designed to meet specific needs, ensuring you find the perfect solution for your screening operations.