Experimental Studies of the Process of Loose Material Transportation by a Pneumatic-Screw Conveyor

Abstract

The article presents the developed design of the pneumatic-screw conveyor, as well as its experimental installation. The method of conducting experimental researches to determine force indicators at movement of different types of loose materials under the influence of air pressure and their volume of various types of bulk materials. Based on the conducted experimental studies, the response surfaces and two-dimensional cross-sections of the pneumatic-screw conveyor productivity when the material passes from the whole area in the hopper transition zone to the screw feeder, its rotation frequency and the working air pressure in the process line have been constructed.

Design development and study of an elastic sectional screw operating tool

“…Investigations were conducted to determine the grain degradation rate caused by hard T h and elastic T e augers. The regression equation determining the dependence of the grain degradation rate on values α, n and ∆ for the rigid auger is as follows T h = 0.0108 + 0.0046α + 0.0005n + 0.053∆ (2) The factorial field had the following range of parameter variations: 0°≤ α ≤ 40°; 200 ≤ n ≤ 500 (rpm); 2 ≤ ∆ ≤ 7 (mm).…”

“…To increase the conveyor productivity, pneumatic devices are used, which improve material flow modes. Developments found in the works of [1][2][3] are dedicated to the subject of increasing the operational efficiency of pneumatic auger conveyors, and in [4][5][6][7], the results of a research on pneumatic conveyors with a simultaneous transportation and mixing of bulk material in the main characteristic areas routes are presented. They provide the transportation of bulk materials along technological paths of various spatial configurations employing a mechanical feed of material by a screw discharger and an additional intensification of the process with the help of pneumatic devices.…”

“…We also carried out a research analysis on improvement of operational and functional characteristics of screw and tubular conveyors and a reliable safety protection of their drive members, which are described in the works of [8,9]. These conveyors are designed to simultaneously transport and mix bulk feed mixtures along multicurved paths with lower energy inputs of the technological process.…”

Mathematical model of the safety clutch in the screw conveyor drive for loose raw materials

“…Отримана математична модель дає змогу визначити вплив основних параметрів на динаміку спрацювання запобіжної муфти шнекового транспортера у разі перевантаження робочого органа. Застосовуючи цю модель, можна підібрати раціональні конструктивні 1 vbulgakov@meta. ua, 2 vvadamchuk@gmail.com, 3 klendii_o@ukr.net; ORCID: 1 0000-0003-3445-3721, 2 0000-0003-0358-7946, 3 0000-0002-4671-5824…”

Theoretical justification of the parameters fle­xible screw conveyor for transportation of grain materials

“…Обертаючись із частотою понад 550 об⋅хв -1 , гнучка гвинтова спіраль фактично рівномірно розподіляє сипкий матеріал по периферії кожуха транспортера, що зумовлює її самоцентрування і забезпечує переміщення продукту в зону вивантаження [6,7].…”