1. Srđan Bošnjak, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
2. Zoran Petković, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
3. Miodrag Arsić, Belgrade, Institute for Material Testing, Serbia
4. Nebojša Gnjatović, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
5. Ivan Milenović, Univeristy of Belgrade, Faculty of Mechanical Engineering, Serbia
Design of the buckets of the bucket wheel excavators has to meet the set
of the functional requirements imposed by the processes of: (a) soil cutting; (b) filling;
(c) transportation of the grabbed soil; (d) emptying. Optimal conduct of each of these
processes imposes requirements, which are often in mutual collision. Except functional
requirements, bucket structure has to meet, naturally, rigidity as well as strength
criterion. During exploitation in harsh working conditions, failures of buckets occur
relatively frequently. There are two basic types of bucket failures: structural and
technological. In this paper, two bucket structural failures as well as one techologocal
bucket failure are presented. Investigations' results pointed out that structural failures
are caused by 'design-in' as well 'manufacturing-in' defects. Technological failure of the
bucket was also of the 'design-in' type. Besides that, the redesigned buckets' are
presented. Exploitation after the reconstruction fully confirmed the validity of the
presented reconstruction design.
Tematska oblast:
Production Technologies and Engineering
Datum:
26.03.2015.
