Parametric Study of Factors Influencing Screw-Conveyor Throughput and Power Requirement

1969 ◽  
Vol 12 (1) ◽  
pp. 0051-0054
Author(s):  
G. H. Brusewitz and S. P. E. Persson
Keyword(s):  
Parametric Study ◽  
Screw Conveyor ◽  
Power Requirement ◽  
Factors Influencing

scholarly journals Determination of Effective Factors on Power Requirement and Conveying Capacity of a Screw Conveyor under Three Paddy Grain Varieties

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Ezzatollah Askari Asli-Ardeh ◽  
Ahmad Mohsenimanesh
Keyword(s):  
Experimental Design ◽  
Inclination Angle ◽  
Screw Conveyor ◽  
Screw Speed ◽  
Power Requirement ◽  
Effective Factors ◽  
Minimum Power ◽  
Zero Degree ◽  
Four Levels

An experiment was conducted to investigate the effect of screw speed, inclination angle and variety on the required power, and conveying capacity of a screw conveyor. The experiment was designed with four levels of screw speed (600, 800, 1000, and 1200 rpm), five levels of inclination angle (0, 20, 40, 60, and 80∘), and three levels of variety (Alikazemi, Hashemi, and Khazar). The Length, diameter, and pitch of screw were 2, 0.78, and 0.5 m, respectively. The experimental design was a randomized complete block (RCB) with factorial layout. Maximum and minimum power requirements of tested screw conveyor were 99.29 and 81.16 Watt corresponding to conveying capacity of 3.210 and 1.975 ton/hour obtained for khazar and Alikazemi varieties, respectively. The results indicated that as screw inclination angle increased from 0 to 80∘, the conveying capacity decreased significantly from 3.581 to 0.932 t/h. It can be concluded that the most conveying capacity was 4.955 t/h at tests with khazar variety and conveyor inclination angle zero degree.

scholarly journals Design, Simulation and Experimentation of an Axial Flow Sunflower-Threshing Machine with an Attached Screw Conveyor

2021 ◽  
Vol 11 (14) ◽  
pp. 6312
Author(s):  
Khaled Abdeen Mous Ali ◽  
Wangyuan Zong ◽  
Hafiz Md-Tahir ◽  
Lina Ma ◽  
Liu Yang
Keyword(s):  
Feed Rate ◽  
Rotational Speed ◽  
Specific Energy Consumption ◽  
Axial Flow ◽  
Good Choice ◽  
Screw Conveyor ◽  
Feeding Rates ◽  
Power Requirement ◽  
Machine Productivity ◽  
Seed Handling

Sunflower threshing is one of the most interesting field processes for making the sunflower ready for seed handling, drying, cleaning and oil extraction. One of the biggest problems observed during the sunflower threshing process is the accumulation of threshed crop on the first third of the threshing roller and passing off some unthreshed parts of sunflower heads. To solve the aforementioned problem and optimize the efficiency of the sunflower threshing process, this research was focused on devising and testing a sunflower threshing machine with a close threshing box system equipped with a screw conveyor that evenly distributed the feedstock of sunflower heads on the entire length of the threshing roller. The machine was tested to assess the seed damage rate, unthreshed seed percentage, threshing efficiency, machine productivity, power requirements and specific energy consumption. The evaluation was done under different roller rotational speeds (150, 200, 250 and 300 rpm) and feeding rates (600, 700, 800 and 900 kg/h). The obtained results revealed that the threshing evaluation parameters were affected significantly by the roller rotational speed and feeding rate. The threshing efficiency was observed to rise with the rise in the roller rotational speed, and it also rose with the increasing feed rate up to 800 kg/h and then started to descend. The unthreshed seed percentage decreased with the increase in the roller rotational speed for all feed rates, and it decreased with the increasing feed rate up to 800 kg/h and then started to increase at the higher feed rates. The damaged seed percentage, power requirement and machine productivity increased with the increase of the roller speed and feed rate. The Buckingham π theorem was followed to find an equation to predict the threshing efficiency, resulting in an equation with an R2 value of 0.9309. With elimination of the blockage problem and better threshing efficiency, this machine could be a good choice for small- to medium-sized sunflower farms.

Sign in / Sign up

Export Citation Format

Share Document