DU Linear vibrating screens (banana screens) from thyssenkrupp
thyssenkrupp DU Linear vibrating screens are often called banana screens due to their design with different inclinations of the screen decks and are working with the principle of thin layer screening.
They are characterized by high capacities and excellent screening efficiency. Banana screens can be used in many ways such as wet and dry screening and dewatering of bulk materials such as hard rock, limestone, phosphate, coal, ore, sand and salt. The continuously adjustable amplitude and the optional counter-vibration frame to reduce foundation loads are just two of many interesting features.
Design and function of thyssenkrupp DU linear vibrating screens
The material is classified on linear vibrating screen decks with different inclinations. Due to the steeper angle in the feed area, the material is first roughly pre-screened, while the required screening efficiency is provided in the flatter discharge area. As a result, the height of the material layer is constant over the entire length of the screen. Thus banana screens achieve high throughput rates with high screening efficiency at the same time.
The bolted design of the screen body without any welded joints guarantees maximum fatigue strength and service life. For the screen decks, perforated plates, polyurethane segments or wire cloth are offered, which can be quickly and easily replaced by means of appropriate clamping devices. An impact table is provided in the feed area to take up the loads of the material falling on the screen. The side walls and cross beams are lined with wear plates. Together with the springs, further vibration isolation can be achieved with a counter-vibration frame to reduce the foundation loads.
Double eccentric drive DU
The linear motion of the banana screens is achieved by a double eccentric drive (DU) in which counter-rotating, adjustable weights generate the required acceleration. This allows the vibration amplitude to be continuously adjusted. The DU drive is connected to the jack shaft gearing via a cardan shaft, which is driven by a belt drive. As an option, an electric brake can be used, allowing to pass the critical speed range more fast during shut down of the screen.
DU linear vibrating screens from thyssenkrupp are particularly distinguished by their ease of maintenance. The screen decks are easily accessible and the screen linings can be changed quickly. No special tools are required for the installation and removal of wear and spare parts.
Advantages of thyssenkrupp DU linear vibrating screens
Overall, linear vibrating screens from thyssenkrupp are convincing due to their high capacities and sophisticated, maintenance-friendly technology. The advantages of these screens are among others:
Suitable for screening hard rock, limestone, ore, coal, phosphate, sand, salt, etc.
Dry and wet screening and dewatering of bulk materials
Principle of thin layer screening
Realization of high throughput rates with high screening efficiency
The material and design of the screen decks can be adapted to the specific application
Constant stroke, continuously adjustable
Reduction of the dynamic foundation loads with optional counter-vibration frame
No special tools required for exchange of wear and spare parts.