Abstract
The bucket wheel excavator (BWE) is a complex continuous digging machine, used to excavate material using a layout of buckets installed on a rotor (bucket wheel), and at the same time, using the conveyor system installed on its boom, transferring this material to the main conveyor. The bucket wheel is the operating equipment, and it rotates in the vertical plane and performs (with the boom) a pivoting movement in the horizontal plane and an ascendant – descendent movement in the vertical plane. The paper presents a new grafo-numeric method of determination of the operation power of the BWE rotor, using computer simulation in SolidWorks. The aim of using virtual models for the analysis of the operation of some components of the BWE is to reduce the specific energy consumption during cutting while maintaining the installed operation power of the rotor, to increase the excavation capacity and to improve the cutting – loading system.
Highlights
The method proposed for the determination of the operation power of the rotor has been applied to EsRc-1400 model bucket wheel excavator (BWE) [1]
The paper proposes a way of determining the operation power of the bucket wheel of a BWE using a grafo-numeric method
We have developed a chip model resulting from the excavation process with the SolidWorks
Summary
The method proposed for the determination of the operation power of the rotor has been applied to EsRc-1400 model BWE [1]. The equation (16) will become: hi = h0 sin (8) This equation expresses the variation of the chip thickness according to the rotation angle of the bucket wheel, relative to the chips maximum thickness. We impose a calculation magnitude that we call the effective chip thickness It is the measure of the side of a rectangle that has an area equal to the area of the chip section determined by equation (11), and the other side is equal to the length of the arc corresponding to the maximum angle. Under these conditions, the area of the chip section in terms of effective thickness will be:. B the width of the extracted block; the position angle θ of the bucket wheel relative to the width of the excavated block
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