Investigation into Experimental and DEM Simulation of Guide Blade Optimum Arrangement in Multi-Rotor Combine Harvesters
Abstract
:1. Introduction
2. Materials and Methods
2.1. Threshed Output Distribution
2.2. Determination of Guide Blade Location on Return Plate
EDEM Simulation Parameter Settings
2.3. Verifying the EDEM Numerical Simulation Results
2.4. Field Experiment
- (1)
- Grain sieve loss ratio, Sq:
- (2)
- Grain impurity ratio, Zz:
3. Results and Discussion
3.1. Threshed Output Distribution after Leaving the Concave
3.1.1. Threshed Output Distribution under the Tangential Rotor
3.1.2. Threshed Output Distribution under the Horizontal Axis Flow Rotor I
3.1.3. Threshed Output Distribution under the Horizontal Axis Flow Rotor II
3.2. EDEM Simulation Results Analysis
3.3. Field Experiment Results
4. Conclusions
- (1)
- The optimum arrangement location of the guide blades was obtained by analyzing the simulated results under different arrangements. A height of 50 mm for the guide blade, an installation angle of 25° on the surface of the return plate, and two guide blades placed parallel to each other were found to constitute the optimum arrangement.
- (2)
- The field experiment’s results indicate that the simulated results were validated by the experimental results. The field experiment’s results indicate that the cleaning performance significantly improved with proper guide blade arrangement. The average grain impurity ratio declined significantly from 1.26 to 0.67%, and the average grain sieve loss ratio, with a decrease of 53.2%, was reduced from 1.11 to 0.52%.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Material Properties | Short Straw | Return Plate | Rice Grain |
---|---|---|---|
Density (kg/m3) | 160 | 7850 | 1350 |
Young’s modulus (Pa) | 1.3 × 107 | 2.0 × 1011 | 5.0 × 108 |
Poisson’s ratio | 0.45 | 0.29 | 0.25 |
Collision properties | Grain–plate | Short straw–return plate | Grain–grain |
Restitution coefficient | 0.5 | 0.26 | 0.43 |
Rolling friction coefficient | 0.01 | 0.01 | 0.01 |
Static friction coefficient | 0.56 | 0.8 | 0.75 |
Test No. | Angle of the Guide Blade (°) | Height of the Guide Blade (m) | Guide Blade Number |
---|---|---|---|
1 | 25 | 30 | 1 |
2 | 25 | 40 | 2 |
3 | 25 | 50 | 3 |
4 | 30 | 30 | 2 |
5 | 30 | 40 | 3 |
6 | 30 | 50 | 1 |
7 | 35 | 30 | 3 |
8 | 35 | 40 | 1 |
9 | 35 | 50 | 2 |
Location | Grain Number | Short Straw Number |
---|---|---|
1 | 7500 | 1200 |
2 | 1900 | 350 |
3 | 1600 | 300 |
4 | 2200 | 450 |
5 | 1200 | 380 |
6 | 3000 | 400 |
7 | 1500 | 450 |
8 | 2900 | 1000 |
Test Conditions | Test No. | Grain Impurity Ratio (%) | Average Grain Impurity Ratio (%) | Grain Sieve Loss Ratio (%) | Average Grain Sieve Loss Ratio (%) |
---|---|---|---|---|---|
Without guide blade | 1 | 1.11 | 1.26 | 0.97 | 1.11 |
2 | 1.23 | 1.19 | |||
3 | 1.43 | 1.12 | |||
With guide blade | 1 | 0.70 | 0.67 | 0.52 | 0.52 |
2 | 0.68 | 0.54 | |||
3 | 0.62 | 0.49 |
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Liang, Z.; Li, J.; Liang, J.; Shao, Y.; Zhou, T.; Si, Z.; Li, Y. Investigation into Experimental and DEM Simulation of Guide Blade Optimum Arrangement in Multi-Rotor Combine Harvesters. Agriculture 2022, 12, 435. https://doi.org/10.3390/agriculture12030435
Liang Z, Li J, Liang J, Shao Y, Zhou T, Si Z, Li Y. Investigation into Experimental and DEM Simulation of Guide Blade Optimum Arrangement in Multi-Rotor Combine Harvesters. Agriculture. 2022; 12(3):435. https://doi.org/10.3390/agriculture12030435
Chicago/Turabian StyleLiang, Zhenwei, Jun Li, Jianmin Liang, Yifan Shao, Tengfei Zhou, Zengyong Si, and Yaoming Li. 2022. "Investigation into Experimental and DEM Simulation of Guide Blade Optimum Arrangement in Multi-Rotor Combine Harvesters" Agriculture 12, no. 3: 435. https://doi.org/10.3390/agriculture12030435