Design and Operating Parameter Optimization of a Harvester for Efficient Lily Bulb Cultivation

2021 ◽  
Vol 37 (4) ◽  
pp. 635-644
Author(s):  
Ruijin Guo ◽  
Zengxi Li ◽  
Ping Zhao ◽  
Tiankuo Yu ◽  
Yingdong Yang ◽  
...  
Keyword(s):  
Simulation Analysis ◽  
Theoretical Calculations ◽  
Operating Parameter ◽  
Physical And Mechanical Properties ◽  
Soil Parameters ◽  
List Type ◽  
Forward Speed ◽  
Stem Damage ◽  
Low Efficiency ◽  
Lily Bulb

Highlights An urgent need exists to mechanize lily harvesting to meet growing demand. A new lily bulb harvester suited to the agronomy of lily planting sites in China was designed. Operation parameters were optimized and validated via field tests. Bulb loss and stem damage rates of 2.31% and 1.82%, respectively, were achieved. Abstract . At present, lily bulbs are harvested primarily by manual excavation in most countries, whereas harvesting machinery is used for other tuber and rhizome crops. However, this approach results in several problems, such as high manual excavation costs, low efficiency, and incomplete separation of soil and lily bulbs. To address these problems, we propose a harvesting machine designed specifically for lily harvesting. Our design process involved measuring and analyzing the physical and mechanical properties of soil and lily bulbs during the harvest period, designing key mechanical components through theoretical calculations, and performing a single-factor simulation of the harvesting process to determine the test value range of each factor. We considered the bulb loss and stem damage rates as evaluation indicators and the machine forward speed, elevator linear speed, and elevator inclination as test factors. We conducted a three-factor, three-level rotation combined test, and the working parameter values were optimized according to the regression analysis results. The test results show that for a forward speed, linear elevator speed, and elevator inclination of 1.4 m/s, 1.8 m/s, and 25°, respectively, the bulb loss and stem damage rates were limited to 2.31% and 1.82%, respectively, thus maximizing the quality and yield of the harvest. Field experiment results showed that the optimized results were consistent with the experimental results and met the requirements of lily harvesting. Keywords: Harvester, Rhizome harvesting, Lily cultivation, Lily bulb properties, Soil parameters, Simulation analysis.

scholarly journals Dynamic analysis of material motion using MATLAB/Simulation environment and test verification

2020 ◽  
Vol 12 (9) ◽  
pp. 168781402095780
Author(s):  
Mei Fang ◽  
Zhihong Yu ◽  
Wenjie Zhang
Keyword(s):  
Dynamic Analysis ◽  
Structural Design ◽  
Simulation Analysis ◽  
Model Simulation ◽  
Maximum Relative Error ◽  
Matlab Simulation ◽  
Simulation Results ◽  
Low Efficiency ◽  
Test Verification ◽  
The Mathematical Model

Throwing device is an important factor that directly affects the performance of chaff cutter. In this work, the dynamic analysis linked with the problem of low efficiency and residue blockage of disc knife chaff cutter is executed. Based on this perspective, the mathematical model, simulation, and testing of the material movement have been carried out. Simulations are performed in MATLAB/Simulink environment. An anemometer records the airflow velocity, which provides data for simulation analysis. The simulation results showed that during the movement along the blade, the material first performs deceleration and then accelerates; in other stages, only deceleration. And finally calculated the throwing distance. To support the presented simulations, an experimental study is conducted. The experimental results are compared with simulation results, the maximum relative error between the simulated value and the experimental value is 9.42%, which verified the correctness of the model. This research provides a theoretical basis for the structural design, parameter optimization, and matching of the chaff cutter.

Simulation Analysis of Savonius Turbine with Self-Rotating Blades

2012 ◽  
Vol 614-615 ◽  
pp. 480-484
Author(s):  
Zhi Peng Tang ◽  
Ying Xue Yao ◽  
Liang Zhou ◽  
Jin Ming Wu ◽  
Bo Wen Yu
Keyword(s):  
Wind Speed ◽  
Simulation Analysis ◽  
Power Coefficient ◽  
Rotating Blades ◽  
Low Wind Speed ◽  
Separating Flow ◽  
Wide Range ◽  
Low Efficiency ◽  
Driving Torque ◽  
The Impact

This paper analyzed the advantages of traditional Savonius (S-type) turbine and the reasons of its low efficiency, proposed a new type of turbine with self-rotating blades and surrounded by a rectifier, and studied the aerodynamic performance by numerical simulations. The turbine is composed of a rectifier and a rotor, the rectifier consists by straight and arc segments which can accelerate the wind speed and adjust the inflow wind angle. The self-rotating blade can reduce the impacted area acting on the leeward blade by wind and arm of the impact torque, therefore reduces the resistant torque of the blade, and the driving torque acting on the windward blade is almost the same with traditional S-type turbine, which can increase the overall driving torque. The result shows that the new turbine has the advantages as below: wide range of wind speed for effective working, high power coefficient (Cp), suitable for low wind speed aera etc. Although the flow field in S-type turbine is complex separating flow, the performance of the turbine proposed in this paper is improved and is better than traditional S-type turbine in numerical simulation which is worth for spreading.

scholarly journals 3D Modeling Method of Whole Structure for Turbo-generator Based on PROE-ANSOFT Information Interaction

2018 ◽  
Vol 10 (1) ◽  
pp. 47
Author(s):  
Yu-Ling He ◽  
Qing-Fa Meng ◽  
Ping Wang ◽  
Wen-Qiang Tao
Keyword(s):  
Simulation Model ◽  
Simulation Analysis ◽  
Simulation Models ◽  
Advantages And Disadvantages ◽  
Finite Element Software ◽  
Physical Connection ◽  
Turbo Generator ◽  
Information Interaction ◽  
3D Simulation Model ◽  
Low Efficiency

In this paper, a new method based on PROE-ANSOFT Information Interaction for building 3D model of turbo-generator structure is proposed, which can solve those problems such as low efficiency of surface modeling, the lack of physical connection relation for the automatic turbo-generator integral structure, the occurrence of insufficient memory and even crashes for imported PROE model. Taking the stator winding coil of a turbo-generator as an example, the establishment process of 3D solid model is given. On this basis, the overall structure of turbo-generator in the ANSOFT working platform is completed. And the advantages and disadvantages of five kinds of simulation models in ANSOFT working platform are compared and analyzed. The results show that the 3D simulation model drawn by this method can be no longer limited to the special solution environment of electromagnetic field symmetry. Meanwhile, this model can simulate the real physical connection relationship, and complete the division of the simulation model, which will be helpful for the further simulation analysis of the finite element software.

scholarly journals Development and Evaluation of Low-Damage Maize Snapping Mechanism Based on Deformation Energy Conversion

2021 ◽  
Vol 11 (24) ◽  
pp. 12158
Author(s):  
Zhilong Zhang ◽  
Aijun Geng
Keyword(s):  
Energy Conversion ◽  
Rotational Speed ◽  
Performance Test ◽  
Simulation Analysis ◽  
Deformation Energy ◽  
Forward Speed ◽  
Spring Stiffness ◽  
Test Rig ◽  
Damage Rate ◽  
The Impact

Reducing ear damage is the key to improving the quality of maize harvests. In order to reduce the impact and damage of the ear caused by the ear snapping mechanism, this paper proposes a method to convert ear deformation energy during collision into elastic potential energy in the ear snapping mechanism. According to the above method, a low-damage maize snapping mechanism was designed. In order to verify the feasibility of energy conversion in reducing damage, the dynamic model of the contact between the ear and the snapping plate was established, and a dynamic simulation analysis was carried out based on the finite element method (FEM). In order to obtain better parameters for the improved mechanism, a test rig was established, after which a performance test was carried out on the test rig. The results showed that the primary and secondary order that affected the ear damage rate was the rotational speed of the snapping roller, the spring stiffness and the forward speed. The data processing software Design Expert was used to optimize the parameters, it was concluded that when the rotational speed was 805 r·min−1, the forward speed was 1.29 m·s−1, the spring stiffness was 33.5 N·mm−1, the model predicted that the ear damage rate was 0.023%. Therefore, this paper could provide further reference for research into maize low-damage ear snapping technology.

Simulation Analysis and Experimental Research on Silage Corn Crushing and Throwing Device

2021 ◽  
Vol 37 (4) ◽  
pp. 725-734
Author(s):  
Kang Niu ◽  
Qizhi Yang ◽  
Shenghe Bai ◽  
Liming Zhou ◽  
Kaikang Chen ◽  
...  
Keyword(s):  
Field Experiments ◽  
Simulation Analysis ◽  
Dynamic Balance ◽  
Scientific Basis ◽  
Simulation Software ◽  
List Type ◽  
Corn Stalk ◽  
Motion Simulation ◽  
Factors Affecting ◽  
Design And Optimization

HIGHLIGHTS The mechanism of straw smashing was analyzed. Factors such as the speed of the cutter shaft, the number of blades, the thickness, and the inclination angle had a greater impact on the theoretical length of the straw section after crushing. Based on the straw crushing mechanism, the structure of the crushing chamber was designed. The corn stalk crushing and sending device was trial-produced and field experiments were carried out. ABSTRACT . In order to further improve the crushing quality of corn stalks, this research designs a corn stalk crushing and throwing device. First, it introduced the overall structure and working principle, and analyzed the crushing mechanism of corn stalks to obtain the main factors affecting its crushing performance. Then, the crushing blade in the crushing chamber was designed to determine that the number of crushing blades was 10. Kinematics and dynamic balance analysis, and the establishment of a mathematical model, the speed range of the crushing cutter shaft was 530~900 r/min. On this basis, the ADAMS motion simulation software was used to measure the change curves of the restraint force, runout, and acceleration of the shaft end with different speeds of the crushing cutter shaft. The simulation analysis finally determined that when the speed of the crushing knife shaft was 700 r/min, and the working performance of the device was better and meets the requirements of dynamic balance. Finally, the verification test was carried out, and the result shows: when the speed of the crushing knife shaft was 700 r/min, the qualified rate of corn stalk crushing length was 93.65%. Compared with the original silage corn crushing and throwing device, the performance had increased by 4.78%. It meets the standard of corn stalk crushing operation, which can provide a theoretical basis and scientific basis for the design and optimization of corn stalk crushing and returning equipment. Keywords: Crushing mechanism, Dynamic balance, Motion simulation, Silage corn.

scholarly journals Operating Parameter Optimization using DOE Method to Reduce Unburned Carbon of Fly Ash for Tangential Fired Subcritical Coal Fired Power Plant

2018 ◽  
Vol 225 ◽  
pp. 05008
Author(s):  
Pogganeswaran Gurusingam ◽  
Firas Basim Ismail ◽  
Taneshwaren Sundaram
Keyword(s):  
Power Plant ◽  
Operating Cost ◽  
Operating Parameter ◽  
Current Method ◽  
Unburned Carbon ◽  
Plant Operator ◽  
Rapid Economic Growth ◽  
Low Efficiency ◽  
Best Parameter ◽  
The One

As electric demand increasing due to rapid economic growth, most developing country are sourcing for cheap fuel and low maintenance power plant which coal fired power plant become the more preferable plant. The cheap and abundant coal resources have played a major factor for coal power plant selection compare to other type of power plant. Although this plant type has low maintenance and operating cost but its emission of by product has a great effect on daily plant operation and environment. The one of the major emission was unburned carbon which by product of incomplete combustion where remaining of coal that unburned exits the furnaces with ash. Presence of higher percentage of unburned carbon indicates the low efficiency of furnace combustion and this directly affects financial status of the power plant operators. This condition causes severe damages on the boiler tube by formation of slagging and clinkering which reduces heat transfer and efficiency of the furnace. Current method proved to be more time consuming and plant operator facing difficulty to reduce unburned carbon in real time. As a solution for this problem, a best parameter was predicted to achieve low percentage of unburned carbon.

Design and Implementation of Perturb and Observe (P&O) MPPT Technique for Negative Output Super-Lift Luo Converter

2015 ◽  
Vol 787 ◽  
pp. 888-892 ◽  
Author(s):  
P. Dhivya ◽  
V. Chamundeeswari ◽  
R. Seyezhai
Keyword(s):  
Renewable Energy ◽  
Energy Demand ◽  
Theoretical Calculations ◽  
Renewable Energy Sources ◽  
Maximum Power ◽  
Renewable Energy Resources ◽  
Solar Module ◽  
Perturb And Observe ◽  
Low Efficiency ◽  
Negative Output

TThe growing energy demand in recent years has led to increased use of renewable energy resources. Among all renewable energy sources, the photovoltaic (PV) power generation acts as a green source which is free from greenhouse emissions to provide feasible solution to the increasing energy demand. However the non-linear nature of the solar module, their low-efficiency and high capital cost is being the major hindrance to the penetration and reach of the solar photovoltaic systems. To overcome this non-linearity, this paper presents the implementation of Negative Output Super-Lift Luo converter (NOSLC) with the solar panel. NOSLC is a type of super-lift converter in which the negative output voltage increases in geometric progression. Along with this, to track the maximum power from the PV cell, a technique named Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) is employed. This proposed system is modelled and simulated using MATLAB/Simulink and validated with the theoretical calculations.

Theoretical Method Research on a MEMS Safety and Arming Device

2014 ◽  
Vol 901 ◽  
pp. 93-97 ◽  
Author(s):  
Fang Yi Liu ◽  
Wen Zhong Lou ◽  
Fu Fu Wang ◽  
Ying Wang
Keyword(s):  
Statistical Method ◽  
Simulation Analysis ◽  
Theoretical Calculations ◽  
Theoretical Method ◽  
Calculation Error ◽  
Spring Stiffness ◽  
Analysis Software ◽  
Element Analysis ◽  
Offset Distance ◽  
Existing Structure

With the intelligent development of small-caliber ammunition, the overall size of the fuze is compressed. In this paper, a theoretical method-energy statistical method has been proposed according to the MEMS S&A device. Taking the slider mass, micro-spring stiffness, latch mechanism size, and initial offset distance into account, the conversion relationship among each part of energy in the process is obtained. For an existing structure of MEMS S&A device, known parameters are utilized to reverse the overload value at arming condition. The ANSYS/LS-DYNA finite element analysis software is used for simulation analysis, thereby confirming the feasibility of theoretical calculations. Also, theoretical calculation error ε is obtained, which to be 0.7%. Energy statistical method and simulation analysis serve as theoretical references for the design of the MEMS S&A device.

scholarly journals DESIGN AND EXPERIMENT OF TRANSPLANTING MACHINE FOR CABBAGE SUBSTRATE BLOCK SEEDLINGS

2021 ◽  
pp. 375-384
Author(s):  
Zhichao Cui ◽  
Chunsong Guan ◽  
Tao Xu ◽  
Jingjing Fu ◽  
Yongsheng Chen ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Block Size ◽  
High Specificity ◽  
Conveyor Belt ◽  
Forward Speed ◽  
Separation Device ◽  
Belt Speed ◽  
Industry Standards ◽  
Low Efficiency ◽  
Transplanting Machine

Aiming at the problems of high specificity and low efficiency of vegetable transplanting machine, a substrate block seedling transplanter was designed. Through theoretical calculation and force analysis, the structural parameters of two key components of automatic seedling separation device and planting device are determined. Taking cabbage seedlings with 40 × 40 × 40mm substrate block size as the experimental object, the effects of forward speed, planting frequency, front conveyor belt speed on lodging rate, missing rate and qualified rate were studied by single factor test and three factor three-level orthogonal test. Based on the analysis of the significance and interaction of the experimental data, the best combination of the forward speed of 1.1km/h, the planting frequency of 55 plants / min and the front conveyor belt speed of 0.5km/h was obtained. The verification test of the best combination showed that the average qualified rate of planting was 93.31%, which met the relevant industry standards.

Design and Experimental Study of a Spiral Auxiliary Feeding Device for Lodged Corn on a Combine Harvester

2021 ◽  
Vol 65 (1) ◽  
pp. 31-38
Author(s):  
Qiankun Fu ◽  
Jun Fu ◽  
Zhi Chen ◽  
Rongqiang Zhao ◽  
Luquan Ren
Keyword(s):  
Orthogonal Experiment ◽  
Optimal Harvesting ◽  
List Type ◽  
Forward Speed ◽  
Factors Affecting ◽  
Rotating Speed ◽  
Combine Harvester ◽  
Mechanical Bending ◽  
Working Parameters ◽  
Grain Security

HighlightsThis study designed an auxiliary feeding device for lodged corn on a combine harvester.The mechanical characteristics of lodged corn stalks were studied as the basis of the design.The working parameters were optimized in an orthogonal experiment.Abstract. Lodging causes kernel and ear loss in mechanical harvesting of corn and threatens grain security. To address this issue, the mechanical bending properties and lifting forces of lodged corn stalks were explored in this study. The ears of lodged corn could be lifted to the normal harvesting height by applying an upward force to the stalks. Based on this conclusion, an auxiliary feeding device for lodged corn in a combine harvester was designed. An orthogonal optimization experiment was conducted to explore the effects of working parameters on the device performance. The results demonstrated that the sequence of the factors affecting kernel loss with the auxiliary feeding device was: harvesting direction, forward speed of the harvester, and rotating speed of the spiral stalk lifter. The optimal combination of harvester forward speed and rotating speed of the spiral stalk lifter was 0.5 m s-1 and 300 rpm, and the ratio of the peripheral speed to the speed of motion was 9.42. The optimal harvesting direction was opposite to the lodging direction of the stalks. This study provides a theoretical basis and design reference for low-loss harvesting of lodged corn. Keywords: Auxiliary feeding, Combine harvester, Corn, Harvest loss, Lodging, Orthogonal experiment.

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