Substantiation of geometric parameters of discharge hopper hole at gravitational outflow of finely dispersed bulky material
Date
2019-03-20
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Видавництво Львівської політехніки
Lviv Politechnic Publishing House
Lviv Politechnic Publishing House
Abstract
The variability of physical and mechanical properties of finely dispersed bulky
materials during processing and storage, the manner and height of filling the tanks; the terms and
conditions of storage have a decisive influence on the choice of parameters of the discharge hoppers
of bunkers with gravitational outflow. Therefore, the purpose of the article wasto justify the geometric
parameters of the discharge hopper to provide a gravitational outflow of finely dispersed bulky
materials. The geometrical parameters of the discharge hoppers were determined through
mathematical simulation of the flow outflow of materials under the influence of gravity forces and the
analysis of the tense state of bulky materials in the zone of outflow. As a result of mathematical
simulation, the maximum diameter of the outlet of the hopper hole is determined, that implements the
effect of "self-locking" the flow of the product is realized. The influence of physical and mechanical
characteristics of finely dispersed bulky materials and angles the conical discharge hopper hole on the
size of the outlet during the gravitational outflow is established. The mathematical model of the
gravitational outflow of materials with conical discharge hopper hole, which takes into account the
complexity of the nature of physical and mechanical connections between particles of materials is
developed in the article. The research results allow to design bunkers for storage of finely dispersed
bulky materials, to predict their behaviour with gravitational outflow and to ensure reliable operation
of bunkers during their unloading. Also, in the future, it is advisable to carry out mathematical
simulation of the process of gravitational outflow of finely dispersed bulky materials from bunkers of
various cross sections and with different forms of the discharge hoppers.
Description
Keywords
finely dispersed bulky materials, gravitational outflow, discharge hopper hole, elementary volume of the dome, autohesion force, passive stress state
Citation
Sholovii Y. Substantiation of geometric parameters of discharge hopper hole at gravitational outflow of finely dispersed bulky material / Yurii Sholovii, Nadiia Maherus // Ukrainian Journal of Mechanical Engineering and Materials Science. — Lviv : Lviv Politechnic Publishing House, 2019. — Vol 5. — No 1. — P. 20–28.