scholarly journals Longitudinal Axial Flow Rice Thresher Performance Optimization Using the Taguchi Technique

Agriculture ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 88
Author(s):  
Mohamed Anwer Abdeen ◽  
Abouelnadar Elsayed Salem ◽  
Guozhong Zhang
Keyword(s):  
Performance Optimization ◽  
Feed Rate ◽  
Axial Flow ◽  
Feeding Rates ◽  
Power Requirement ◽  
Rotating Speed ◽  
Seed Loss ◽  
Harvesting Process ◽  
Combine Harvesters ◽  
Working Device

Combine harvesters are widely used worldwide in harvesting many crops, and they have many functions that cover the entire harvesting process, such as cutting, threshing, separating, and cleaning. The threshing drum is the core working device of the combine harvester and plays an influential role in rice threshing efficiency, threshing power requirement, and seed loss. In this study, two structures of rice threshers (conical-shaped and cylindrical-shaped) were tested and evaluated for performance under different thresher rotating speeds of 1100, 1300, and 1500 rpm and different feeding rates of 0.8, 1.1, and 1.4 kg/s. The experiment was designed using the Taguchi method, and the obtained results were evaluated using the same technique. The thresher structure and operating parameters were assessed and optimized with reference to threshing efficiency, required power, and productivity. The obtained results revealed that increasing thresher rotating speed and the feeding rate positively related to threshing efficiency, power, and productivity. The highest efficiency of 98% and the maximum productivity of 0.64 kg/s were obtained using the conical-shaped thresher under a 1500 rpm rotating speed and a feed rate of 1.4 kg/s, whereas the minimum required power of 5.45 kW was obtained using the conical thresher under a rotating speed of 1100 rpm and a feed rate of 0.8 kg/s.

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.

scholarly journals Longitudinal Axial Flow Rice Thresher Feeding Rate Monitoring Based On Force Sensing Resistors

2021 ◽  
Author(s):  
Mohamed Anwer Abdeen ◽  
Gan Xie ◽  
Jianwei Fu ◽  
Abouelnadar Elsayed Salem ◽  
Guozhong Zhang
Keyword(s):  
High Speed ◽  
Feeding Rate ◽  
Axial Flow ◽  
Force Sensing ◽  
High Speed Photography ◽  
Feeding Rates ◽  
Stress Monitoring ◽  
Rotating Speed ◽  
Seed Loss ◽  
The Impact

Abstract The threshing unit is the main working unit of the combine harvester and plays an essential role in rice threshing efficiency, seed loss, and seed damage. Every thresher has its limitation for feeding quantity, and when the feeding quantity exceeds the maximum rated amount, the thresher gets blocked, which results in higher losses, low threshing efficiency, more power consumption, and combine overloading, then combine shutting down at the end. In this study, a longitudinal axial flow rice threshing platform has been constructed, and a stress monitoring system for the top cover of the threshing drum was designed using force sensing resistors. The sensors were installed on the thresher top cover inner surface to detect the impact and extrusion forces caused by the threshing process and detect the feeding rate when it exceeds the suitable feeding of the combine. Three feeding rates (0.8, 1.1, and 1.4 kg/s) and three thresher speeds (1100, 1300, and 1500 rpm) were tested. The time of the testing process was calculated using high-speed photography. The obtained results revealed that the force signals collected by thin-film sensors significantly correlated with thresher rotating speed and feeding rate. This study provides a new method for threshing drum real-time feeding quantity monitoring and early warning of thresher blockage.

scholarly journals Rancangbangun Starter Elektrik Portabel untuk Mesin Traktor Tangan

2020 ◽  
Vol 40 (1) ◽  
pp. 48
Author(s):  
Geraldo Adinugra Rimartin ◽  
Bambang Purwantana ◽  
Radi Radi
Keyword(s):  
Performance Test ◽  
Transmission Mechanism ◽  
Power Requirement ◽  
Rotating Speed ◽  
Turn On ◽  
Starter Motor ◽  
High Preference ◽  
Work Accident ◽  
Set Up ◽  
Main Components

Indonesian farmers used to utilize crank to turn on hand tractor machine till today. It may make operators weariness and potentially raised work accident. The purpose of this study was to design a portable electric starter for hand tractor machine. Moreover, the study was addressed to evaluate the performance of the design. The minimum rotational speed (n) and initial torque (T) in decompression and non decompression conditions were adopted to calculate the minimum power (P) requirement. The minumum power of decompression and non decompression were 572.78 watts (≈ 0.74 hp) and 841.75 watts (≈ 1.09 hp), respectively. These values used as a reference in determining the main components, namely the wet type 12 volt battery and the serial type direct current starter motor. The next step, set up additional components, transmission mechanism, as well as concept of portable electric starter. The design was realized by construction and assembly process. A performance test was carried out on the prototype. The performance test of non decompression showed 1.88 seconds for working time, 264.56 Joules for workload (operator), 363.20 rpm for rotating speed and 0.68 watt hours for power requirement. Overall, application portable electric starter indicated better performance than crank. This study proved a high preference of operator on application of portable electric starter in decompression conditions.

scholarly journals Design and technological aspects of spiked cereal combine stripping

2021 ◽  
Vol 285 ◽  
pp. 07001
Author(s):  
Gennady Maslov ◽  
Elena Yudina ◽  
Denis Ushakov ◽  
Gavriil Samurganov
Keyword(s):  
Technology Implementation ◽  
High Performance ◽  
System Research ◽  
High Increase ◽  
Grain Crushing ◽  
Wheel Drive ◽  
Combine Harvester ◽  
Harvesting Process ◽  
Combine Harvesters ◽  
Unit Performance

The article proposes system research of the spiked cereals harvesting process by a combine stripping, when the stripping header and the grain heap clearing are performed by one harvesting unit based on a self-propelled all-wheel drive combine harvester with a modernized design and technological scheme, in contrast to their aggregation by conventional batch-produced harvesters, which do not provide the harvesting quality according to the agrotechnical requirements. The commonly used aggregation of high-performance stripper headers by series combine harvesters, does not give an effect from the technology of combine stripping due to such violations of agrotechnical requirements as grain crushing for up to 1,9 %, its direct losses off the combine for up to 1,5 %, high kernel micro-damage, etc. With the use of a system approach, the design and technological aspects of spiked cereal combine stripping have been proposed, the use of which will eliminate the disadvantages of the used combine stripping while maintaining the high achievements of this technology in increasing labor productivity by 1,4 ... 2,0 times and saving diesel fuel for up to 45 %. In the principles of improving the technology by combine stripping, proposed by the authors, the requirements for its subsystems are given, indicating the main parameters of the stripping header and the combine harvester that aggregates it for clearing an unwinnowed grain heap. The proposed approach will enable to accelerate the spiked cereal stripping technology implementation with a high increase in the harvesting unit performance by 1,4 ... 2,0 times and with a fuel economy for up to 45 %.

scholarly journals Utility-Taguchi based hybrid optimization approach in machining of graphite composites

2021 ◽  
Vol 13 (1) ◽  
pp. 10-16
Author(s):  
Jogendra Kumar ◽  
Prakhar Kumar Kharwar ◽  
Rajesh Kumar Verma
Keyword(s):  
Performance Optimization ◽  
Feed Rate ◽  
Removal Rate ◽  
Hybrid Optimization ◽  
Confirmatory Test ◽  
Optimization Approach ◽  
Taguchi Approach ◽  
Machining Performance ◽  
Fiber Volume ◽  
Volume Percentage

In the present scenario, composites material is widely used in various engineering areas like satellite components, aircraft parts, chemical and sports industries. Graphite is an allotrope of carbon that possesses various electrical and mechanical properties. In this paper, graphite is taken as reinforcement into the epoxy matrix. In this study, the hybrid optimization module is developed to tackle multi-objective machining performance optimization issues. Utility concept coupled Taguchi approach is used to find out optimum values of responses in three input factors i.e., drill speed, feed rate and fiber volume percentage varied at four discrete levels and surface roughness (Ra) and material removal rate (MRR) are taken as process response. Taguchi L16 OA has been used to perform the machining operation. Multiple responses aggregated into a single function i.e., overall utility (U) and finally optimized by the Taguchi concept. Utility embedded Taguchi approach determined the favorable machining setting which the confirmatory test has verified shows satisfactory results. ANOVA outcomes reveal that feed rate (73.37%) is the most important factor trailed by drill speed (3.44%) and fiber volume percentage.  

scholarly journals Performance analysis of the process of combine harvesting of grain crops

2020 ◽  
Vol 175 ◽  
pp. 05005 ◽  
Author(s):  
Victor Kataev ◽  
Ilia Markvo ◽  
Kaprel Khubiian ◽  
Valery Dimitrov
Keyword(s):  
Performance Analysis ◽  
The South ◽  
Actual Performance ◽  
Factors Affecting ◽  
Grain Crops ◽  
Local Organizations ◽  
Harvesting Process ◽  
Combine Harvesters

The effectiveness of combine harvesting processes is one of the most important indicators of planting enterprises, as it largely determines the efficiency of the entire organization. One of the problems in assessing the effectiveness of combine harvesters is the determination of the planned performance of machines with rated productivity. The paper considers approaches to determining the planned and actual performance of the processes of combine harvesting of grain crops. The factors affecting the decrease in the performance of combines have been studied. The analysis of data on the wheat harvesting process in local organizations of the South of Russia during 2014-2019 has been carried out. The results of calculating the planned and actual performance of wheat harvesting processes in these farms are presented.

scholarly journals Harvesting Lupinus albus axial rotary combine harvesters 

2018 ◽  
Vol 64 (No. 4) ◽  
pp. 209-214 ◽  
Author(s):  
Nikolay Aldoshin ◽  
Otari Didmanidze
Keyword(s):  
Lupinus Albus ◽  
Seed Mass ◽  
Axial Flow ◽  
Plant Protein ◽  
Rotor Speed ◽  
Technological Parameters ◽  
White Lupine ◽  
Combine Harvester ◽  
Leguminous Crops ◽  
Combine Harvesters

To ensure the agricultural production of the plant protein, it is advisable to cultivate leguminous crops, such as white lupine (Lupinus albus), which are rich in plant protein. White lupine is an easily threshed crop. Its seeds are large enough, so the main problem is to avoid seed damage during harvesting. To improve the harvesting technology of white lupine, the authors suggest using grain combine harvesters with axial flow threshing and separating mechanism (TSM). They consider it necessary to modify the design of such combine harvesters to eliminate repeated threshing of a grain (seed) mass and decrease threshing intensity in a threshing separating mechanism. The authors have also provided grounds for technological parameters of a combine harvester – a rotor speed and a concave clearance. The recommended rotor speed should be approximately 350–400 min<sup>–1</sup> and the concave clearance should be 40 mm.   

scholarly journals Comparison of Corner-Butt 45 (Cb-45) and Corner-Lap (Cl) joints in friction stir welding

2018 ◽  
Vol 154 ◽  
pp. 01106
Author(s):  
Widia Setiawan ◽  
Djarot B. Darmadi ◽  
Wahyono Suprapto ◽  
Rudy Soenoko
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Experimental Method ◽  
Feed Rate ◽  
Lap Joints ◽  
Nugget Zone ◽  
Rotating Speed ◽  
Friction Stir ◽  
Microstructure Observation ◽  
Independent Parameters

The 10 mm thick Aluminum 6061 plates have been corner joined using varied design and those were 45° Corner Butt and Corner Lap Joints (CB-45 & CL). Friction tool was hardened EMS 45. True experimental method was used with independent parameters is feed rate which varied at 10 mm/min, 15 mm/min and 30 mm/min respectively. Other parameter such as rotating speed was kept constant. Experiment results show that, CB-45 yields better properties than CL. The tensile strength of CB-45 reaches 163.7 MPa for 10 mm/min feed rate. Whilst CL produces joint with tensile strength equal 120 MPa for equal parameters. Microstructure observation showed that CB-45 produces fine and homogenous appearance of MgO compared to CL. This phenomenon is caused by the pin of CB-45 joint which fully penetrates the nugget zone which is not found in CL design. This microstructure in turn promotes higher tensile strength of CB-45.

scholarly journals A Proposal for Optimized Design of Multistage Compressors

1989 ◽  
Author(s):  
Raffaele Tuccillo
Keyword(s):  
Performance Optimization ◽  
Augmented Lagrangian ◽  
Axial Flow ◽  
Geometrical Parameters ◽  
Optimized Design ◽  
Augmented Lagrangian Function ◽  
Total Head ◽  
Multistage Compressors ◽  
End Wall ◽  
Quasi Newton

The aim of the paper is to provide a methodology for optimum design of axial flow multistage compressors derived from a flow model, previously defined by the author, that takes into account the effects of several geometrical parameters on blade losses and on the growth of end-wall boundary layers and secondary vorticities. The optimization is performed by means of a “Quasi-Newton” algorithm that controls an “Augmented Lagrangian Function” with the objective of maximizing efficiency for assigned values of total to total head. The paper outlines the theoretical approach and the main practical feature of the methodology, the latter consisting of a performance optimization by imposing even slight variations to the geometry of an existing compressor.

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