Simulation and analysis of the pneumatic recovery for side-cutting loss of combine harvesters with CFD-DEM coupling approach

Jiang, Tao; Zhang, Min; Guan, Zhuohuai; Mu, Shenglin; Wu, Chongyou; Wang, Gang; Li, Haitong

doi:10.25165/j.ijabe.20221502.6267

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Firstly, a five-link mechanism with a planar double-crank driven reel was designed, the key parameters were determined and a theoretical analysis of the new reel was carried out. The results of an analysis of the motion of the new reel showed that compared to the ordinary reel (Jiang et al, 2022), its motion trajectory is particularly suited to tall, thick rapeseed stems; its operational ability is strong, and it is not easy to cause entanglement of rapeseed plants on the reel. These characteristics of the new reel have a positive effect on improving the quality of operation of the windrower.…”

Section: Key Technologies Of the New Rapeseed Headermentioning

confidence: 99%

Design of Key Components for a New Rapeseed Windrower

Ran,

Hu,

Guo

et al. 2024

Eng. Agríc.

View full text Add to dashboard Cite

Rapeseed cutting and sunning are important processes associated with rapeseed harvesting in China. However, existing rapeseed windrowers have problems such as a tendency to entangle rapeseed plants, low laying quality, low operational efficiency, and high cutting power consumption for tall rapeseed plants. Hence, a new type of rapeseed windrower was designed. A new cutter with a planetary gear driving double moving cutting bars was designed, a motion model of the planetary gear mechanism was established, and the motion and structural parameters of the cutter were analysed. A theoretical analysis of this new cutting system showed that it not only had low cutting impact, minimal disturbance to rapeseed stalks, and high cutting continuity, but also low power consumption and stable operating performance. A reel based on a double-crank planar five-link mechanism was designed, and kinematics modelling and analysis of the new reel were carried out. The structure and motion parameters for the new reel were obtained. Finally, field experiments were conducted on both the newly designed rapeseed windrower and the original one. The results indicated that the newly designed windrower was suitable for high-quality, efficient cutting and sunning operations for tall rapeseed plants.

show abstract

Section: Key Technologies Of the New Rapeseed Headermentioning

confidence: 99%

Design of Key Components for a New Rapeseed Windrower

Ran,

Hu,

Guo

et al. 2024

Eng. Agríc.

View full text Add to dashboard Cite

show abstract

“…The airflow velocity at the grain outlet v c is selected as 10 m/s. D c =0.222 m is calculated by Equation (5). The value of D c is 0.22 m.…”

Section: Cyclone Separation Cleaning Devicementioning

confidence: 99%

“…Mechanized rapeseed harvesting is realized by changing the screen and adjusting relevant parameters. However, these improved harvesters often suffer from a significant loss rate and a low cleaning rate [4,5] . Furthermore, 85% of the rapeseed planting area in China is located in the Yangtze River Basin.…”

Section: Introductionmentioning

confidence: 99%

Parameter matching and experiment of the combined cyclone separation and cylinder sieve cleaning system for rapeseed combine harvester

Yuan,

Liao,

Wan

et al. 2024

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

Existing rape combine harvester with a cyclone separation cleaning device has the challenge that the loss rate and the cleaning rate increase and decrease simultaneously. A cleaning process route was proposed, which involves the cyclone separation cleaning device removing light and tiny impurities, and the cylinder sieve device removing coarse and long impurities such as pod shells and short stems. A novel cleaning system combining the cyclone separation cleaning device and cylinder sieve cleaning devices was designed. The ranges of the structure and operation parameters for each component were analyzed based on kinematics and dynamic analysis. A four-factor five-level quadratic orthogonal test was carried out, in which the loss rate and cleaning rate were taken as the evaluation indexes. The velocity at the suction port, the rotation speed of the cylinder sieve, the screw pitch of the spiral blade and the diameter of the sieve hole were taken as the influencing factors. The orthogonal test results showed that the cleaning system performed best at a rotation speed of the winnower is 600 r/min, an airflow velocity at the suction port is 18.25 m/s, a rotation speed of the cylinder sieve is 87 r/min, a screw pitch of the spiral blade is 440 mm and a diameter of the sieve hole is 4.48 mm. At this time, the loss rate of the cleaning system is 3.22%, and the cleaning rate is 95.67%. Compared to the conventional cyclone separation cleaning device, the loss rate is reduced by 2.17% and the cleaning rate is increased by 1.05%. This study can provide a reference for the optimal cleaning system design for rape combine harvesters.

show abstract

“…As a widely used method for rapeseed harvesting, combine harvesting can realize cutting, threshing, separation, and cleaning functions [1,2] , leading to relatively higher production efficiency and less labor consumption compared with the windrower [3,4] . One of the issues for combine harvesting is the proper period for harvesting is short.…”

Section: Introduction mentioning

confidence: 99%

Effects of working parameters on the performance of cyclone separator for rapeseed combine harvester based on CFD

Wan

Yuan

Jia

et al. 2023

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

Existing development for cyclone separation cleaning components of the rapeseed combine harvester, which employs the suspending airflow to separate the rapeseeds from the materials other than grain (MOG), has the challenge to figure out the optimal working parameters, highlighting a need for exploration of the invisible airflow based on Computational Fluid Dynamics (CFD). The airflow status was mainly affected by the air velocities of the inlet, and the outlet for the MOG. The single factor and response surface experiments were carried out. It could be found that the inlet and MOG outlet velocities affected the air velocities through the change in the air quantity. Furthermore, the mathematical model of the relationship between the air velocities inside the cyclone and the working parameters was built, and the optimal combination of working parameters was obtained by multi-objective optimization. The inlet and outlet velocities of the optimal combination were 4.25 m/s and 29.87 m/s, respectively. Under this condition, the cleaning ratio and loss ratio of the cleaning device was 94.62% and 5.39%, respectively, as validated by the field experiment. The findings provide references for the improvement of cleaning systems for rapeseed combine harvesters.

show abstract

Simulation and analysis of the pneumatic recovery for side-cutting loss of combine harvesters with CFD-DEM coupling approach

Cited by 3 publications

References 0 publications

Design of Key Components for a New Rapeseed Windrower

Design of Key Components for a New Rapeseed Windrower

Parameter matching and experiment of the combined cyclone separation and cylinder sieve cleaning system for rapeseed combine harvester

Effects of working parameters on the performance of cyclone separator for rapeseed combine harvester based on CFD

Contact Info

Product

Resources

About