Abstract
Based on Hertz contact theory and one-dimensional Winkler foundation combination with viscoelastic theory, the author derived theoretical formulas of indentation rolling resistance, respectively. Using the laboratorial apparatus of indentation rolling resistance, the author mainly concentrates on the error analysis about two kinds of theoretical formula which bear on indentation rolling resistance compared with experimental result. The reason why author employs Hertz contact theory to discuss indentation rolling resistance is that indentation rolling resistance is a sort of contact resistance. As a result, Hertz contact theory is generally applicable to study it. On the other hand, because conveyor belt has viscoelastic property, it is appropriate to use viscoelastic theory by the aid of three-parameter Maxwell viscoelastic model combination with one-dimensional Winkler foundation. Ultimately, this article infers that theoretical formula based on the Hertz contact is brief and clear compared with one-dimensional Winkler foundation in principle. However, it is noticeable that when the belt is at high speed, the reliability of formula based on Hertz theory has decreased obviously. This conclusion can give a beneficial reference for the energy saving of belt conveyor.
Highlights
Belt conveyor acts as the most common transport machinery of bulk solid, especially with the development of belt conveyor design technology, the pipe belt conveyor has gradually gained popularity of engineering
When belt conveyor is running under low velocity state, both the theoretical formulas based on Hertz contact theory and Winkler foundation can reflect the effect of speed
The author mainly focuses on establishing different mathematical analytic models of indentation rolling resistance
Summary
Belt conveyor acts as the most common transport machinery of bulk solid, especially with the development of belt conveyor design technology, the pipe belt conveyor has gradually gained popularity of engineering. Keywords Indentation rolling resistance, Hertz contact and viscoelastic theory, theoretical formula, laboratorial apparatus, onedimensional Winkler foundation
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