COMPLETE EQUIPMENT FOR INDUCTION HEATING
We have developed a vibratory conveyor with an elliptical oscillation that increases conveyor speed, reduces noise, lowers energy consumption, reduces wear on the conveyor track and extends service life up to several times. The invention is protected by a patent in the Czech Republic and an international patent application has been filed for protection in other countries.
PrincipleThe invention can be applied to vibratory conveyors driven by two unbalance motors. The special position of the unbalance motors excites elliptical oscillation of the conveyor track. On a linear vibratory conveyor the elliptical oscillation can be achieved by tilting the motors according to Fig. 1.
Fig. 1 - Linear vibratory conveyor with elliptical oscillation
On spiral vibratory conveyors such as vibratory bowl feeders or spiral elevators elliptical oscillation can be achieved by tilting the unbalance motors (Fig. 2) or moving them (Fig. 3).
Fig. 2 - Spiral vibratory conveyor with elliptical oscillation and tilted unbalance motors
Fig. 3 - Spiral vibratory conveyor with elliptical oscillation and displaced unbalance motors
The benefits of the elliptical oscillation have been demonstrated by our own research [1], independent research [2, 3] and deployment in practice.
The elliptical oscillation significantly increases conveyor speed. Vibratory conveyors with a straight oscillation and a rising track may have problems with insufficient conveyor speed, especially when conveying low friction materials. Elliptical oscillation completely eliminates these problems. In critical cases the ellipticity of the oscillation is decisive for the correct functioning of the vibratory conveyor.
An elliptically oscillating vibratory conveyor can be operated at lower speeds or with less unbalance than a straight oscillating vibratory conveyor. This can prevent the conveyor from overshooting the gravitational acceleration and noisy bouncing of material. The material moves along the conveyor track only by sliding.
The elliptical oscillation significantly reduces wear. The same amount of material is transported in less time. Lower speeds or less unbalance of the unbalance motors reduce the dynamic stress on the conveyor and surrounding structures. Calculation models indicate up to several times longer service life.
Elliptical oscillation is much more efficient than straight oscillation. For vibratory conveyors with a large transport capacity it can bring interesting savings.
For vertical transport the elliptical oscillation allows the design of a steeper conveyor path. This reduces the dimensions and manufacturing costs of the vibratory conveyor.
The higher efficiency of the elliptical oscillation and the longer lifetime of the conveyor reduce the ecological footprint. The introduction of elliptical oscillation technology does not require the manufacture of a new vibratory conveyor as it is sufficient to modify the straight oscillating conveyor which will extend its lifetime.
The invention can be applied in various fields of industry to different types of vibratory conveyors and feeders with linear and spiral tracks. These applications include horizontal and vertical conveying, sorting, screening, automatic feeding and other manufacturing processes. The change of position of unbalance motors can be easily applied to newly designed and already manufactured vibratory conveyors. Even a slight ellipticity can bring significant improvements in conveying performance. The other parameters of the vibratory machine can be maintained.
We use the elliptical oscillation technology on vibratory bowl feeders for automatic feeding of billets into forging lines (Fig. 4). We want to support the introduction of innovations in vibratory technology also outside our area of commercial interest and therefore we offer other vibratory technology manufacturers the purchase of a license.
Fig. 4 - Vibratory bowl feeder for automatic feeding of billets into forging lines
Research references:
