STATISTICAL ANALYSIS OF CRACKS AND DEFECTS ON THE BEARING STEEL STRUCTURES OF THE SRs 2000 TYPE BUCKET WHEEL EXCAVATORS WITH A SIGNIFICANTLY USED RESOURCE

Abstract. The research object of the present work aims to reveal the relationship between the technical condition of the steel supporting structure and the elements and nodes on which the stability of rotary excavators type SRs 2000 depends on their service life. The research mainly covers the steel supporting structure of the excavators, because the durability of the machines depends on it, due to the fact that the drives, mechanisms, and electrical equipment installed on it are subject to replacement, modernising, and repair, which cannot be carried out on all supporting structures. In addition to the supporting structure, accompanying units were inspected, such as: the running mechanism, the lifting mechanism, the rotation mechanism of the superstructure, etc., because their technical condition significantly affects the load on the supporting structure and the stability of the excavator.