- Title
- Some theoretical consideration of stress states at the hopper feeder interface
- Creator
- Guo, Jie; Roberts, Alan; Jones, Mark
- Relation
- International Conference on Bulk Materials Storage, Handling and Transportation (13th : 2019 : Surfers Paradise, QLD.). 13th International Conference on Bulk Materials Storage, Handling and Transportation ICBMH 2019 (Gold Coast, Qld. 08-11 July, 2019) p. 870-878
- Relation
- https://www.newcastle.edu.au/research/centre/cbspt/icbmh-2019
- Publisher
- Engineers Australia
- Resource Type
- conference paper
- Date
- 2019
- Description
- Feeders play an important role in bulk solids handling operations due to their extensive use in controlling the gravity flow of bulk solids from bins and stockpiles. To ensure efficient feeding, the hopper and feeder geometries are designed as an integral unit. Because of the interaction of two systems, the stress states in the hopper for a feeding system, to some extent, differ from the stress states in an independent hopper without the feeder underneath. The feeder loads are induced by the material directly loading on the feeder and influenced by the stress states in the hopper at the hopper/feeder interface. The vertical pressure at the hopper outlet is generally regarded as the direct cause of the vertical feeder load [1, 2]. Further research through experimental investigations [3, 4] suggested that the calculation based on the major consolidation stress in the hopper provided an improved estimation of feeder loads at the hopper/feeder interface for the flow cases taking account of the re-distribution of the stress field in the feed zone. This paper presents an alternative hypothesis in terms of the stress states for flow cases in the hopper at the hopper/feeder interface zone. It was proposed that a combined stress state occurred in the hopper during feeder operation, including a passive stress field and an active stress field at the upper and lower sections of the hopper respectively. The height of the switch of the stress fields is also discussed in this study. The results are compared with experimental outcomes and various theoretical calculations.
- Subject
- hopper feeders; bulk solids handling; gravity flow; interface
- Identifier
- http://hdl.handle.net/1959.13/1459603
- Identifier
- uon:45723
- Identifier
- ISBN:9781925627299
- Language
- eng
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