Optimised balancing of tumbler screening machines reduces the residual forces by up to 80 %

The high screening quality and the damage-free screening in tumbler screening machines result from a rotary, eccentric motion with a radial component and a tangential component. The radial component is responsible for the transport of the particles from the centre of the screen to the edge, while the tangential component causes the particles to follow a circular path. Until now, tumbler screening machines have been balanced only radially in order to reduce the (horizontal und vertical) residual forces transferred to the surrounding steel structure or the concrete foundation to a minimum. The tangential component, which can also cause imbalance, has been ignored in the past.

With the newly developed, multidimensional electronic balancing system "MultiBalance", ALLGAIER has now optimised the balancing of tumbler screening machines even further. With this system, it is now also possible to almost completely eliminate the tangential component. Measurements show that the new electronic balancing system can reduce the residual forces left after conventional balancing by up to 80 %.

This is particularly important in cases where the resonant frequency of the building or steel structure in which the tumbler screening machine runs lies close to the excitation frequency of the screening machine. In such cases the great reduction of the residual forces by means of MultiBalance prevents undesired and thus damaging resonance effects.