Analysis of the Causes of Fatigue Cracks in the Carrying Structure of the Bucket Wheel in the SchRs4600 Excavator Using Experimental-Numerical Techniques

摘要

The article presents design faults related to the carrying structure of the bucket wheel of the SchRs4600 excavator working in the brown coal mine. The authors analyzed cases of damages of this type of structure occurred in the past in such machines. In order to determine the damage of the carrying structure of the bucket-wheel excavator, non-destructive examinations were carried out using visual and magnetic-particle methods. The real loads occurring during operation of the machine in the case of fatigue were also determined. These measurements were used to verify the numerical model. A strength analysis was carried out using the Finite Element Method. The cause of fatigue cracks was determined by measurements and numerical calculations.