HAVER NIAGARA F-Class – Eccentric Screening Machine with New Bearing Concept

For the first time at bauma 2013 in hall B2, stand 129/236, the HAVER & TYLER Alliance will be exhibiting the new, patent-pending bearings concept in the F-Class eccentric screen series which will introduce a further innovation to processing technology. This new development was masterminded by HAVER & TYLER Alliance’s Innovation Management Department.

 

The concept has floating outer bearings embedded in rubber which buffer radial vibrations from the eccentric drive shaft. Vibrations such as these occur with strong load alteration when the screening machine feed rate suddenly rises during operation or when external force is applied, such as the direct impact of a hydraulic hammer used to remove blockages in a primary crushing plant or by excavator shovels in mobile plants. In standard eccentric vibration screens the outer bearings are not buffered and radial vibration is transferred directly to the outer bearings and support frame. This bears the risk of direct or medium-term damage to the bearings. Buffering the outer bearings helps to extend the service life of the bearings with radial vibration and increase the availability of the screening machine during operation. Investing in our innovative bearings concept with the outer bearings encased in rubber has a positive effect on your ROI.

 

The new HAVER NIAGARA F-Class has all the constructive and functional properties of the familiar HAVER NIAGARA T-Class. The modular, standardised assembly of the components, comprising the screen box, continuous drive train, spring brackets and support frame, simplifies maintenance and spare parts storage. Its wide range of operation, i.e. the various combinations of drive shaft speed and amplitude from 630 to 1,060 rpm and 3.1 to 9 mm, enable the eccentric vibration screen to be perfectly adapted to suit all tasks and requirements. The optional reinforced screen box frame has been designed for heavy-duty use or comes into play when higher demands are made of machine availability, such as in the mining industry. With a machine width of up to 3,000 mm the HAVER NIAGARA F-Class is extremely suitable for high feed and throughput rates. The inner and outer bearing size combinations of 150/110 mm, 180/130 mm and 220/150 mm are geared towards oversized outer bearings to ensure availability even with large loads.

 

The HAVER NIAGARA F-Class eccentric vibration screen is fully balanced, i.e. the dynamic loads during screening machine operation are minimal, so that the static loads of the machine and feed material are determinative when dimensioning the steel structure.

 

The HAVER NIAGARA F-Class is distinguished by the fact that various screening media can be combined with one another on one deck. Depending on the task on hand, screen meshes, pressure-welded gratings, snap-in screen panels or perforated plates can be combined. Adapters enable screening media from different manufacturers to be used; the screen operator is therefore not committed to any particular manufacturer. Subsequent modifications to the assigned media are also not a problem as the HAVER mounting rail system is not welded to the screen box crossbeam. 

 

The crossbeams in the screen box can also be optionally fitted with the patented HAVER-Snap-Guard® wear protection system that permits wear protectors to be quickly and easily replaced during machine servicing.

 

The HAVER NIAGARA F-Class eccentric screen is suitable for all classifying jobs – from medium to large grain size – where load independent screening is necessary due to fluctuating feed rates and clinging feed material.

At bauma 2013 a double deck HAVER NIAGARA F-Class S 180/130 2400 x 6000 2D will be on show which has been designed exemplarily for armourstone screening and a feed grain of 0/450 mm. The screen deck sizes are 2,400 x 6,000 mm. The upper deck is fitted with perforated plates with 100-mm openings. The lower deck has variable configurations which can cope with various screening tasks. The combination on display, consisting of ISENMANN PU snap-in screen panels, TY wire and FlexMat modules, all of which are fixed down using the ISENMANN WS85 hold-down system, guarantee optimum stability, an open screening surface, selectivity and blockage-free operation in each phase of the screening process. The HAVER-Snap-Guard® wear protection system protects the crossbeams from wear.

 

Your press contact for HAVER NIAGARA GmbH, Muenster:

Dipl.-Geol. THOMAS HOLZLEHNER

Marketing and Public Relations

Robert-Bosch-Straße 6

48153 Muenster

Phone: +49 251 9793-102

Fax: +49 251 9793-156