Design Optimization and Experiment of Four-Row Potato Seedling-Cutting Machine

2021 ◽  
Vol 37 (6) ◽  
pp. 1155-1167
Author(s):  
Jingbin Sun ◽  
Xueqiang Li ◽  
Shaochuan Li ◽  
Xiangyou Wang ◽  
Linlin Wang
Keyword(s):  
Rotation Speed ◽  
Optimal Parameter ◽  
Orthogonal Experiment ◽  
Forward Speed ◽  
Test Results ◽  
Potato Seedling ◽  
Cutting Machine ◽  
Cutting Rate ◽  
Cutting Operation ◽  
Potato Seedlings

HighlightsBased on the innovative analysis of the seedling-cutting operation mechanism, five shapes of seedling-cutting blades were designed, and a four-row potato seedling-cutting machine was developed.The kinematics and mechanics of seedling-cutting blades were analyzed, which can provide a theoretical basis for the selection of experimental factors.A regression orthogonal experiment and variance analysis were carried out to verify the performance of the four-row potato seedling-cutting machine. Finally, the main and secondary factors affecting the seedling-cutting performance and the optimal parameter combination were obtained.Compared with other studies, the structure of the seedling-cutting blades are more complete in this study. The test results show that the qualified rate of the broken length of the potato seedlings is significantly improved, the missed cutting rate of the potato seedlings is reduced, and the length of the stubble is more uniform, which greatly improves the quality of seedling-cutting.Abstract. A four-row potato seedling-cutting machine was designed to address the problems associated with potato seedling-cutting machines with low qualified rates of broken length and stubble length and high missed cutting rates. Based on the analysis of the seedling-cutting operation mechanism, key components were designed, and the kinematics and mechanics were analyzed. A regression orthogonal experiment was carried out, taking the rotation speed of the seedling-cutting blade shaft, forward speed of the seedling-cutting machine, and height of the short blade of the ridge top from the ridge platform as the experimental factors and the qualified rate of the broken length of the potato seedlings, missed cutting rate of the potato seedlings, rate of carrying potatoes, and length of the stubble as experimental indexes. The results showed that the prioritized impact of various factors on the qualified rate of the broken length of the potato seedlings ranked as follows: the rotation speed of the seedling-cutting blade shaft > the height of the short blade of the ridge top from the ridge platform > the forward speed of the seedling-cutting machine. The prioritized impact of various factors on the missed cutting rate of the potato seedlings ranked as follows: the forward speed of the seedling-cutting machine > the rotation speed of the seedling-cutting blade shaft > the height of the short blade of the ridge top from the ridge platform. The prioritized impact of various factors on the rate of carrying potatoes and the length of the stubble ranked as follows: the height of the short blade of the ridge top from the ridge platform > the rotation speed of the seedling-cutting blade shaft > the forward speed of the seedling-cutting machine. The optimal parameter combination was a rotation speed of the seedling-cutting blade shaft of 1400 r/min, forward speed of the seedling-cutting machine of 4.22 km/h, height of the short blade of the ridge top from the ridge platform of 62 mm. Based on this combination, the qualified rate of the broken length of potato seedlings was 94.1%, the missed cutting rate of the potato seedlings was 0.30%, the rate of carrying potatoes was 0.49%, and the length of the stubble was 54 mm. The index values of the verification experiments were 94.6%, 0.38%, 0.53%, and 56 mm, which were better than the standard values, indicating that this machine meets the basic operation requirements. The test results can provide theoretical support and technical reference for improving the parameter and structural design of a potato seedling-cutting machine. Keywords: Field experiment, Flail blade, Potato, Seedling-cutting machine.

Dynamic Analysis and Experimental Research of Laser Cutting Machines

2014 ◽  
Vol 915-916 ◽  
pp. 31-34
Author(s):  
Qing Ping Zhang ◽  
Zheng Ru Wang ◽  
Yan Fang Wang
Keyword(s):  
Machine Tool ◽  
Modal Analysis ◽  
Laser Cutting ◽  
Machining Accuracy ◽  
Dynamics Analysis ◽  
Theoretical Base ◽  
Test Results ◽  
Cutting Machine ◽  
Manufacturing Errors ◽  
Theoretical Results

Vibration is one of the most important problems in laser cutting machine tool, which causes the manufacturing errors, also influences the machining accuracy of the parts. Modal analysis can calculate vibration type of structures. The paper presents how to use the powerful FEA software ANSYS to do the modal analysis on laser cutting machine tool and also studies the undamped free vibration on laser cutting machine tool. Finally, the test results and theoretical results were compared to verify the rationality of the modal, these provide theoretical base and conditions for dynamics analysis and optimal design.

scholarly journals Unbalanced Vibration Identification of Tangential Threshing Cylinder Induced by Rice Threshing Process

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Zhong Tang ◽  
Haotian Zhang ◽  
Yuepeng Zhou
Keyword(s):  
Service Life ◽  
Vibration Amplitude ◽  
Rotation Speed ◽  
Resonance Phenomenon ◽  
Test Results ◽  
Axial Vibration ◽  
Ansys Software ◽  
Cylinder Axis ◽  
Vibration State ◽  
Rice Stalks

Unbalanced vibration of tangential threshing cylinder increased the grain loss, shortened service life of the cylinder, and resulted in structural resonance during the rice threshing process. In this paper, the vibration amplitude and frequency of tangential threshing cylinder shaft were tested, and the vibration state of tangential threshing cylinder was identified. The restricted and working modalities of tangential threshing cylinder were solved by ANSYS software. Then, by comparing the resonance phenomenon between the inherent constraint frequency and the rotation speed frequency, the shaft vibration under the idle condition of tangential threshing cylinder was tested and analyzed. According to the axial vibration and axial trajectory of the cylinder, the inherent properties and characteristics of unbalanced vibration were revealed. Test results showed that when the tangential threshing cylinder was at idling and no-load state, the amplitude of vibration in the feed direction of straw flow was -0.049~0.060 mm, and the average vibration amplitude was 0.013 mm. As rice flowed along the tangential threshing cylinder, the vibration amplitude slightly increased. The trend and phase of each trajectory were similar, although the amplitude of each trajectory was different. The tangential threshing cylinder axis trajectory was flat oval. Unbalanced vibration was induced by the rice stalks in the concave gap.

Study on Chlorpyrifos Residues Degradation by Mutagenic Bacteria DX1 in Soil

2013 ◽  
Vol 726-731 ◽  
pp. 3992-3995
Author(s):  
Ming Fen Niu ◽  
Jian Wei ◽  
Chen Liang
Keyword(s):  
Degradation Rate ◽  
Ph Value ◽  
Orthogonal Experiment ◽  
Organic Fertilizer ◽  
Test Results ◽  
Soil Environment ◽  
Soil Fertilization ◽  
Spss Software ◽  
The Impact ◽  
Different Levels

In this study, it was carried out by designing PH, soil fertilization content, humidity and mutagenic bacteria DX1 inoculation concentration of orthogonal experiment to research chlorpyrifos degradation rate in the soil, which was affected by mutagenic bacteria DX1 in the soil environment. SPSS software was taken visualized analysis and variance analysis to evaluate the impact of different levels of the test results, to determine the factors which had significant impact on the experimental results. It showed that the best environmental factors of chlorpyrifos degradation rate in soil were the pH 7, organic fertilizer content 5mg/kg, the soil moisture 70%, inoculation volume 50ml/kg. The pH value and inoculation volume had a significant impact on chlorpyrifos degradation rate in soil; the soil humidity had little effect and the organic fertilizer content had almost no effect.

Experimental Study on the Influence of Appendages on a Yacht Rolling at Zero Froude Number

2004 ◽  
Vol 41 (04) ◽  
pp. 200-206
Author(s):  
Kim Klaka ◽  
Martin Renilson
Keyword(s):  
Experimental Study ◽  
Froude Number ◽  
Model Test ◽  
Roll Motion ◽  
Forward Speed ◽  
Test Results

Yachts tend to roll uncomfortably while at anchor, causing discomfort to the crew and passengers, generating additional stresses on equipment, and making such operations as embarking and disembarking hazardous activities. Currently, there is a dearth of data regarding roll motions at zero forward speed for hull shapes dominated by large appendages. Hence, an experimental study into the effect of large appendages on roll motion was undertaken. The model test results are presented, showing how changes in appendage geometry alter the roll response.

Development and Application of the Device for Cutting and Disintegration of Radioactive Contamination Glove Box

2017 ◽  
Author(s):  
Zhang Feng ◽  
Qu Weibo ◽  
Jiang Hong ◽  
Yao Dongmei ◽  
Yu Dongqiang ◽  
...  
Keyword(s):  
Subsequent Treatment ◽  
Test Results ◽  
Nuclear Facility ◽  
Nuclear Facilities ◽  
High Concentration ◽  
Cutting Operation ◽  
Design Requirements ◽  
Verification Test ◽  
Treatment And Disposal ◽  
Different Parts

In the process of decommissioning of the nuclear facilities, abandoned and contaminated equipments or devices often need to be dismantled and cut into proper pieces in order to facilitate subsequent treatment and disposal. Since the nuclear facilities were places where radioactive operations were frequently executed, gloveboxes should be such typical abandoned and contaminated devices. Usually, gloveboxes were cut into proper pieces by kinds of tools which was chosen depending on the thickness of stainless steel from different parts of gloveboxes. This traditional cutting was laborious and high concentration of harmful aerosols and gases would be created during the cutting operation. In order to develop more advanced cutting and disintegration ways, a cutting and disintegration device was developed using abandoned and contaminated gloveboxes as operation objects in this work. During the design of this device, the operation convenience, operation exactitude and the protection for operators were fully considered. Also, the hot verification test was carried out. Based on the verification test results, the cutting and disintegration device was reliable and could meet the design requirements, which precisely executed various movements required in the hot verification test. Due to the application of remote operation and advanced cold cutting as the main cutting way in the development of this cutting and disintegration device, radioactive aerosols and harmful gases created during operation of this device were obviously declined compared to past cutting devices, which was of great importance to the health of operators. This work can provide technical support for the development of other similar devices applied in nuclear facility decommissioning.

Research on the Installed Position of the Cutting Device of a Small-Scale Sugarcane Harvester Using Virtual Prototype Technology

2011 ◽  
Vol 201-203 ◽  
pp. 290-297
Author(s):  
Jing Hui Zhou ◽  
Shang Ping Li ◽  
Xi Lai
Keyword(s):  
Rotation Speed ◽  
Virtual Prototype ◽  
Small Scale ◽  
Virtual Experiment ◽  
Forward Speed ◽  
Simulation Experiments ◽  
Holding Device ◽  
Sugarcane Harvester ◽  
The Relationship ◽  
Cutting System

The size of small-scale sugarcane harvester is decided by installation position of the cutting device of it. In this paper , Several simulation experiments were made by established a virtual prototype of sugarcane cutting system, and the relationship between the effect of holding sugarcane(measured by angle) and the installed position of cutting disk with different forward speed and different rotational speed was researched, and propose that the rotation speed of sugarcane holding device and forward speed of harvester influence the installed position of the cutting device by analyzing the data from virtual experiment. At last, a empirical regression equation which indicate the relationship among rotation speed of sugarcane holding device (n), forward speed of harvester (v) and the installed position is given.

Analysis and Calculation of 3MW Wind-Turbine Main Shaft

2012 ◽  
Vol 562-564 ◽  
pp. 664-667 ◽  
Author(s):  
Ren Sheng Zhu ◽  
Jian Shen ◽  
Yong Mei Liu ◽  
Zhen Zhen Zheng ◽  
Zhen Fang ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Polynomial Regression ◽  
Parametric Design ◽  
Orthogonal Experiment ◽  
Main Shaft ◽  
Test Results ◽  
Startup Time ◽  
Orthogonal Experiment Method ◽  
Time Of Operation ◽  
The Relationship

To find the changing regularity of stress and displacement, a 3MW wind-turbine main shaft was modeled and analyzed at startup time of operation. The results were verified by theoretical calculation. Parametric design of the shaft was used through orthogonal experiment method in which parameters were consisted of structural and load ones. The optimal regression equation, which indicated the relationship between the shaft stress or displacement and the parameters, was given by using polynomial regression with the test results.

Study on Numerical Simulation and Experimental of Cutting Force in Turning Machinable Glasses Ceramics

2013 ◽  
Vol 797 ◽  
pp. 229-233 ◽  
Author(s):  
Lian Jie Ma ◽  
Xiao Jiang Zhang ◽  
Ya Dong Gong
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Cutting Force ◽  
Orthogonal Experiment ◽  
Glass Ceramics ◽  
Least Square ◽  
Test Results ◽  
System Vibration ◽  
Cyclic Fluctuation ◽  
Changing Process

Through turning experiment of machinable glass ceramics, the characteristics and law of turning force was studied. Results indicated that the overall changing process of cutting force was sinusoidal. If the cyclic fluctuation caused by system vibration was neglected, the changing process of turning force was scalariform. Through designing orthogonal experiment and applying numerical simulation of multiple regressing theory based on least square algorithm, mathematical model of turning force was established related with process parameters. R-test, F-test and P-test were carried out on the model respectively. The test results showed that the model had high precision. It could guide to cut machinable glass ceramics on prediction and controlling of turning force in some degree.

Study on a Portable Abrasive Suspension Jet Cutting Machine for Coal Mines

2014 ◽  
Vol 490-491 ◽  
pp. 362-367 ◽  
Author(s):  
Wei Zhao ◽  
Chu Wen Guo
Keyword(s):  
High Pressure ◽  
Coal Mines ◽  
Economic Benefits ◽  
Experimental Results ◽  
Complex Environment ◽  
Pressure Tank ◽  
Hazardous Environments ◽  
Cutting Machine ◽  
Cutting Operation ◽  
Abrasive Suspension

Hot cutting is strictly forbidden in coal mines, especially for those with high density of gas. As the only one cold cutting technology, abrasive suspension jet could be used in coal mines to solve the problem of cutting operation under hazardous environments. Based on the technology of abrasive suspension jet, this paper developed a portable cutting machine which is suitable for the dangerous and complex environment in coal mines. Experimental results indicate that the cutting machine could well meet the requirements of cutting operations in coal mines, such as machinery maintenance. Methods for monitoring the quantity of abrasive within the high-pressure tank and the wear of nozzle were also investigated. Safe cutting could be ensured by application of this portable cutting machine. Promotion of the technology would have significant social and economic benefits.

scholarly journals Optimization Design and Experiment of Ear-Picking and Threshing Devices of Corn Plot Kernel Harvester

Agriculture ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 904
Author(s):  
Ranbing Yang ◽  
Dongquan Chen ◽  
Xiantao Zha ◽  
Zhiguo Pan ◽  
Shuqi Shang
Keyword(s):  
Optimization Design ◽  
Axial Flow ◽  
Forward Speed ◽  
Test Results ◽  
Connecting Rod ◽  
Rubber Gasket ◽  
Compression Spring ◽  
Breakage Rate ◽  
Cleaning Device ◽  
Elastic Rubber

In order to solve the problems of easy-to-break kernels and substantial harvest losses during kernel harvesting in breeding trials plot of corn, an ear-picking device and a threshing device of corn plot kernel harvester has been optimized. To automatically change the gap of the ear-picking plate, a self-elastic structure with compression spring and connecting rod is used. The ear-picking plate is glued, and an elastic rubber gasket is placed underneath it, which effectively improves the adaptability of the ear-picking device and reduces corn kernel collision damage during ear-picking. To ensure the self-purification of the ear-picking device, a combination of auger sieve hole cleaning device and lateral pneumatic auxiliary cleaning system is used. A dual-axial flow threshing device is designed, which uses a “U”-shaped conveying system to transport maize ears in the threshing chamber. The spacing of the concave sieve may be adjusted, and the residual kernels in the threshing chamber can be cleaned up after harvesting one plot by combining three cleanings, which meets the requirements of no mixing between plots. The force analysis of corn ears in the threshing chamber determines the best design plan for the forward speed, the speed of the second threshing drum, and the threshing gap. The breakage rate and non-threshing rate regression models were created using the quadratic regression orthogonal combination test, and the parameters were optimized using MATLAB. The verification test results showed that when the forward speed was 0.61 m/s, the second threshing drum speed was 500 r/min, and the threshing gap was 40 mm, the breakage rate was 1.47%, and the non-threshing rate was 0.89%, which met the kernel harvesting requirements in corn plots.

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