Screw Conveyors Power and Throughput Analysis during Horizontal Handling of Paddy Grains

Abstract

The tests reported in this research were conducted to determine the effects of those parameters believed to have the greatest influence upon horizontal screw conveyors throughput capacity and power requirement when handling paddy grains. Two screw conveyors with diameters of 20 and 25 cm were evaluated at four screw clearances (6, 9, 12 and 15 mm) and five screw rotational speeds (200, 300, 400,500 and 600 rpm). The results revealed that for both the conveyors tested, with increasing the screw rotational speed, the conveyor capacity increased and reached to a maximum point and after the point, the volumetric capacity decreased. Increasing the screw speed caused the volumetric efficiency and power requirements of the conveyors to be decreased and increased, respectively. The throughput capacity and power requirement of the conveyors increased (P<0.01) with increasing the auger dimensions. As the screw clearance increased, the throughput capacity and power requirement of the conveyors decreased (P<0.01).

Torsional oscillations of an auger multifunctional conveyor’s screw working body with consideration of the dynamics of a processed medium continuous flow

“…(10), the most interesting cases of torsional oscillations from the theoretical and practical point of view are cases: а. 4 2 0 0…”

“…In works [4][5][6][7][8] it was used the method of discrete elements for the analysis of the productivity of screw conveyer including visualization of motion of particles, the angular and axial speed of particles and on the whole twisty moment and total force. It is built the model by application of its periodic border for one step of screw and the particle of friable material, it is shown the dependence of the productivity ofscrew conveyer on operating conditions.…”

Conceptual energy and water recovery system for self-sustained nano membrane toilet

“…Transport of settled solids is conducted using the screw conveyor. Whereas it can be powered through human endeavour, this study assumes the screw conveyor, which has a conservative specific power requirement of 0.056 Wh/kg settledsolids [31] , [32] , is electrically driven by power generated in the Stirling engine. To accurately account for the composition of the settled solids, these are modelled as a nonconventional component with proximate and ultimate analysis provided in Table 1 , and heating value determined from its composition using Dulong’s formula.…”

Manufacturing a Mechanical Unit for Grain Packing

“…The screws used for free flowing bulk solids, giving better throughput control and providing clean environmentally system for handling grains owing to their simple form, high performance, less price and maintenance. Also, Zareiforoush et al (2010) They designed a special screw conveyor for rice specie called Hashemi and reported that the specific power requirements increased of the conveying screws by increasing the screw clearance and screw velocity. Also, the actual volumetric capacity increased up to a maximum value by increasing rotational conveyor screw conveyor rotational speed.…”