Movement of chopped material in the discharge spout of forage harvester with a flywheel chopping unit: Measurements using maize and numerical simulation

Lisowski, A.; Świątek, K.; Klonowski, J.; Sypuła, Michał; Chlebowski, J.; Nowakowski, T.; Kostyra, K.; Strużyk, A.

doi:10.1016/j.biosystemseng.2012.01.003

Cited by 28 publications

(13 citation statements)

References 4 publications

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“…It will bring certain difficulties to the material handling process. Lisowski et al [9][10] studied the effects of different technical parameters on the effective power and the discharge process during the process of silk reeling. It was found that the corn stalk cutting and feeding process had an inverse relationship with the demand for effective work, and the materials moved to the external environment.…”

Section: Introductionmentioning

confidence: 99%

Analytical and Experimental Analyses on Corn Stalk Crushing Process

2021

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Due to the lack of effective numerical simulation method for the corn stalk crushing process, the structural efficiency of the processing equipment is limited. In this paper, a discrete element model of corn stalk was established based on the discrete element method (DEM). The parameters of corn stalk bonding contact model (BPM) were validated by physical and virtual experiments. The fracture simulation and experimental verification of the corn straw discrete element model were also performed. The results show that the maximum critical load is 2260 N and 110 N when the straw compression and shear tests are conducted at a loading rate of 5 mm/min. After the parameter calibration of the BPM bond model, the normal stiffness coefficient and tangential direction are obtained. The stiffness coefficient, critical normal stress, critical tangential stress and bond radius are 9.60×10 6 N/m, 6.80×10 6 N/m, 8.72 MPa, 7.5 MPa, 2 mm, respectively. The mechanical properties from the model are close to the corn stalks with 87.8% of water. With the simulation, the materials can be categorized into short, standard, long and uncompleted types, which are consistent with the quality and test results of different types of materials. The results show that the discrete element method is feasible for the simulation of corn stalk crushing process.

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Section: Introductionmentioning

confidence: 99%

Analytical and Experimental Analyses on Corn Stalk Crushing Process

2021

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“…This will accelerate the throwing impeller's fatigue, leading to fracture [2]. In recent years, most research on impeller blowers mainly focused on reducing the power consumption as well as increasing the throwing distance and efficiency [3][4][5][6]. However, relatively few data exist on the topic of investigating the fatigue life of the throwing impeller.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life Prediction for Throwing Impeller of an Impeller Blower

Zhai¹,

Can²,

Cui³

et al. 2019

IJPE

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Impeller blowers are used to convey materials for various forage harvesters. As the main working component, the throwing impeller endures various static and dynamic loads while conveying the materials. This makes the throwing impeller prone to fatigue fracture, so it is very necessary to find a feasible model to estimate the fatigue life of the throwing impeller accurately. In order to obtain the accurate random cyclic load applied on the high-speed rotating impeller, the finite element analysis and the fluid-solid coupling method are adopted to calculate the stress distribution of the impeller under the combined action of the fluid-solid coupling flow field pressure, the centrifugal force, and the gravity. At the same time, the stress on the dangerous section of the impeller is measured by using the DH5909 wireless strain testing system and is compared with the calculated one. The contrast results show that the numerical calculation results are reliable. To accurately predict the fatigue life of the throwing impeller at the design stage, the two-parameter nominal stress model is deduced and combined with the linear cumulative damage model of Miner and the lognormal distribution model. Its two parameters of the average stress S m and the stress amplitude S a can be obtained through finite element analysis and do not have to be equivalent to a symmetrical cyclic load. Therefore, its precision of estimating the fatigue life is improved. By contrasting the rated and predicted fatigue lives of an impeller, it was found that the impeller's actual rated lives are closer to the predicted lives of the Goodman and Gerber twoparameter nominal stress model than those of the conventional S-N curve. In particular, they are closer to the calculation results of the Gerber-type two-parameter nominal stress model. This shows that the Gerber-type two-parameter nominal stress model is more accurate and suitable to predict the fatigue life of the throwing impeller. These achievements will play a significant role in further optimizing the impeller and improving its reliability.

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“…Corn is a main crop in China, the plant area is nearly 25 million hectares all over the China (Lisowski et al 2012), Planting and managing are basically mechanization through the whole process of producing corn, only the harvesting process mechanization's level is relatively lower (Kathirvel et al 2010;Tong et al 2007). Now, all kinds of corn harvesters are being developed, horizontal roller corn harvester is one main kind of these researching types.…”

Section: Introductionmentioning

confidence: 99%

Design and Experiment of Differential Speed Snapping Rollers for Horizontal Roller Corn Harvester

Wang¹,

Hu²,

Tang³

2015

2015 ASABE International Meeting

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This paper analyzed some conditions which cause grain breakage and grain loss during harvesting process of horizontal roller corn harvester. If the transmission rate between two snapping rollers can be changed, the grain breakage and grain loss can be solved at a certain level. So a pair of differential speed snapping rollers for horizontal roller corn harvester was designed, and the work effects between the constant speed snapping rollers and the differential speed snapping rollers were compared by using software CATIA and ADAMS, and found that the rolling speed of inner snapping roller is 500r/min, and the outer snapping roller is 460r/min are the best transmission rate. Finally, a physical experiment was conducted to certificate the simulation effect. In or-der to avoid some disadvantages of field experiment and soil bin experiment in laboratory, half laboratory and half field environment were used in this physical experiment. As a result, the physical experiment confirmed that the analyses above and the simulation by ADAMS were valid. In conclusion, it is an effective method to reduce grain breakage and grain loss by using differential speed snapping rollers for horizontal roller corn harvester. KeywordsSnapping rollers, horizontal roller, speed, corn harvester, grain breakage, grain loss, ADAMS Abstract. This paper analyzed some conditions which cause grain breakage and grain loss during harvesting process of horizontal roller corn harvester. If the transmission rate between two snapping rollers can be changed, the grain breakage and grain loss can be solved at a certain level. So a pair of differential speed snapping rollers for horizontal roller corn harvester was designed, and the work effects between the constant speed snapping rollers and the differential speed snapping rollers were compared by using software CATIA and ADAMS, and found that the rolling speed of inner snapping roller is 500r/min, and the outer snapping roller is 460r/min are the best transmission rate. Finally, a physical experiment was conducted to certificate the simulation effect. In or-der to avoid some disadvantages of field experiment and soil bin experiment in laboratory, half laboratory and half field environment were used in this physical experiment. As a result, the physical experiment confirmed that the analyses above and the simulation by ADAMS were valid. In conclusion, it is an effective method to reduce grain breakage and grain loss by using differential speed snapping rollers for horizontal roller corn harvester.

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Movement of chopped material in the discharge spout of forage harvester with a flywheel chopping unit: Measurements using maize and numerical simulation

Cited by 28 publications

References 4 publications

Analytical and Experimental Analyses on Corn Stalk Crushing Process

Analytical and Experimental Analyses on Corn Stalk Crushing Process

Fatigue Life Prediction for Throwing Impeller of an Impeller Blower

Design and Experiment of Differential Speed Snapping Rollers for Horizontal Roller Corn Harvester

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