Volodymyr BULGAKOV, Semjons IVANOVS, Volodymyr KUVACHОV, Valerii ADAMCHUK, Viktor KAMINSKIY
One of the ways to improve the maneuverability of wheeled axle machines when they move along the tracks of a constant technological track is the use of onboard turning. This simplifies the layout, increases the useful volume of the machine due to the release of niches in the machine body, necessary for placing the steering wheels when turning. However, the question of the efficiency of onboard turning of axle machines by the criterion of power input remains insufficiently studied. The aim of the research is to substantiate the criterion of the power required to implement on-board turns of an overhead machine. Theoretical research, synthesis of design schemes, parameters and modes of operation of bridge machines have been carried out by simulating on a personal computer the conditions of their functioning. The basics of theoretical mechanics and tractor theory were the basis of the research methods. As a result of the research, it has been established that power (onboard) turning is widely used for wheeled machines and has a prospect of application on bridge machines used in the track farming system. Approbation of the developed methodology of determining power inputs for power (onboard) turning of wheeled axle machines has shown that under the accepted conditions of turning the power required for turning of the axle machine is 28% of the engine power at a speed of 5 km⸱h–1. As the gauge of the bridge machine increases, the total power required for the power (onboard) turn increases exponentially.
{"title":"STUDY OF THE TURNING PROCESS OF THE BRIDGE TYPE MACHINES","authors":"Volodymyr BULGAKOV, Semjons IVANOVS, Volodymyr KUVACHОV, Valerii ADAMCHUK, Viktor KAMINSKIY","doi":"10.35633/inmateh-70-23","DOIUrl":"https://doi.org/10.35633/inmateh-70-23","url":null,"abstract":"One of the ways to improve the maneuverability of wheeled axle machines when they move along the tracks of a constant technological track is the use of onboard turning. This simplifies the layout, increases the useful volume of the machine due to the release of niches in the machine body, necessary for placing the steering wheels when turning. However, the question of the efficiency of onboard turning of axle machines by the criterion of power input remains insufficiently studied. The aim of the research is to substantiate the criterion of the power required to implement on-board turns of an overhead machine. Theoretical research, synthesis of design schemes, parameters and modes of operation of bridge machines have been carried out by simulating on a personal computer the conditions of their functioning. The basics of theoretical mechanics and tractor theory were the basis of the research methods. As a result of the research, it has been established that power (onboard) turning is widely used for wheeled machines and has a prospect of application on bridge machines used in the track farming system. Approbation of the developed methodology of determining power inputs for power (onboard) turning of wheeled axle machines has shown that under the accepted conditions of turning the power required for turning of the axle machine is 28% of the engine power at a speed of 5 km⸱h–1. As the gauge of the bridge machine increases, the total power required for the power (onboard) turn increases exponentially.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136337188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ping Zhao, Tiankuo Yu, Guo-fa Xu, Ruijin Guo, He Li, Hongfei Xu, Tianci Jin, Dong Ji
Taking into account the physicochemical properties of soil and the complexity of adhesion interface, how to improve the soil adhesion on the mechanical surface is a crucial technical issue. In order to lower the increasing resistance caused by soil adhesion on the surface of a digging shovel in potato harvesting, a potato digging shovel with a non-smooth surface structure was designed based on bionics theory. Based on testing physical and mechanical properties of soil, a soil groove model corresponding to soil physical properties and particle model physical properties was established through a combination of simulation and physical tests, and a simulation test for evaluating the drag reduction performance was conducted. The simulation comparison test results show that the performance of the bionic digging shovel is better than that of the traditional potato digging shovel, regardless of whether the broken soil rate or the working resistance is reduced, and the soil adhered to the mechanical surface can be effectively reduced by 93.3%. The research results can provide ideas and methods for solving the adhesion problem between machinery and soil.
{"title":"DESIGN AND DRAG REDUCTION PERFORMANCE ANALYSIS OF A POTATO HARVEST SHOVEL BASED ON THE SURFACE TEXTURE CHARACTERISTICS OF PANGOLIN SCALE","authors":"Ping Zhao, Tiankuo Yu, Guo-fa Xu, Ruijin Guo, He Li, Hongfei Xu, Tianci Jin, Dong Ji","doi":"10.35633/inmateh-70-02","DOIUrl":"https://doi.org/10.35633/inmateh-70-02","url":null,"abstract":"Taking into account the physicochemical properties of soil and the complexity of adhesion interface, how to improve the soil adhesion on the mechanical surface is a crucial technical issue. In order to lower the increasing resistance caused by soil adhesion on the surface of a digging shovel in potato harvesting, a potato digging shovel with a non-smooth surface structure was designed based on bionics theory. Based on testing physical and mechanical properties of soil, a soil groove model corresponding to soil physical properties and particle model physical properties was established through a combination of simulation and physical tests, and a simulation test for evaluating the drag reduction performance was conducted. The simulation comparison test results show that the performance of the bionic digging shovel is better than that of the traditional potato digging shovel, regardless of whether the broken soil rate or the working resistance is reduced, and the soil adhered to the mechanical surface can be effectively reduced by 93.3%. The research results can provide ideas and methods for solving the adhesion problem between machinery and soil.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49577314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Straw found in the field can be conveniently stored and transported through mechanical packaging, and it undergoes crushing during its utilization. The effectiveness of the crushing process directly impacts the efficiency of material utilization. However, current crushing devices available in the market lack specialized mechanisms suitable for the unique characteristics of round corn stalks. To address this issue, the necessary simulation parameters were determined, and an experiment was conducted using the ternary quadratic combination test method. The test factors considered were the center height difference of the knife roller, lower roller speed, and cutter thickness. The response value of the experiment was the material crushing rate. By analyzing the results, the optimal structural parameters were identified. These included a center height difference of 390 mm for the knife roller, a lower roller speed of 14 rpm, and a cutter thickness of 110 mm. With these parameters, the crushing rate of the round straw crushing device reached 93.77%, and the particle passing ratio was 98.52%. To validate the research findings, a test device was constructed and used to confirm the reliability of the obtained results.
{"title":"OPTIMUM DESIGN FOR BREAKING DEVICE WITH DOUBLE ROLLER BASED EDEM","authors":"Ruili Wang, Deshuai Li, Peiyuan Li, Xueyin Bai, Tiejun Wang, Wei Wang, Yingbo Zhao","doi":"10.35633/inmateh-70-55","DOIUrl":"https://doi.org/10.35633/inmateh-70-55","url":null,"abstract":"Straw found in the field can be conveniently stored and transported through mechanical packaging, and it undergoes crushing during its utilization. The effectiveness of the crushing process directly impacts the efficiency of material utilization. However, current crushing devices available in the market lack specialized mechanisms suitable for the unique characteristics of round corn stalks. To address this issue, the necessary simulation parameters were determined, and an experiment was conducted using the ternary quadratic combination test method. The test factors considered were the center height difference of the knife roller, lower roller speed, and cutter thickness. The response value of the experiment was the material crushing rate. By analyzing the results, the optimal structural parameters were identified. These included a center height difference of 390 mm for the knife roller, a lower roller speed of 14 rpm, and a cutter thickness of 110 mm. With these parameters, the crushing rate of the round straw crushing device reached 93.77%, and the particle passing ratio was 98.52%. To validate the research findings, a test device was constructed and used to confirm the reliability of the obtained results.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46942615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Al Douri, V. Apostol, H. Pop, T. Prisecaru, Cornel Constantin Pavel, Iulian Uta, C. Ionita
The paper aims to investigate how to improve the performance of a refrigeration system (Rs) that equips a cold room, by incorporating phase change materials (Phase Change Materials - PCMs) in these systems, a study that has not yet been extended experimentally. The study is carried out on a cold room within the National University of Science and Technology Politehnica Bucharest - Faculty of Mechanical and Mechatronics Engineering, Department of Thermodynamics, Engines, Thermal and Refrigeration Equipment. This room is equipped with a refrigeration system with mechanical vapour compression (VCRs), which uses R404A as refrigerant. Mechanical vapour compression refrigeration system (VCRs) with an evaporation temperature below 0 oC causes ice to form on the evaporator leading to reduced performance. Currently, the widely used methods for defrosting are the standard methods, the most used being the electric one, which of course consumes energy. This paper aims to evaluate the availability of heat that could be used in the defrosting process by means of PCMs. The study was made using the Engineering Equation Solver software, several types of PCMs and also different refrigerants (R600a, R600, R1234yf, R1234ze, R152a, R290, R32) and in this way it was intended to identify the right agent to be used for a particular type of PCM. Faculty of Mechanical and Mechatronics Engineering, Department of Thermodynamics, Engines, Thermal and Refrigeration Equipment
{"title":"IMPROVING PERFORMANCE OF COLD ROOM REFRIGERATION SYSTEM BY DESUPERHEATING ENERGY RECOVERY USING PCMs","authors":"J. Al Douri, V. Apostol, H. Pop, T. Prisecaru, Cornel Constantin Pavel, Iulian Uta, C. Ionita","doi":"10.35633/inmateh-70-53","DOIUrl":"https://doi.org/10.35633/inmateh-70-53","url":null,"abstract":"The paper aims to investigate how to improve the performance of a refrigeration system (Rs) that equips a cold room, by incorporating phase change materials (Phase Change Materials - PCMs) in these systems, a study that has not yet been extended experimentally. The study is carried out on a cold room within the National University of Science and Technology Politehnica Bucharest - Faculty of Mechanical and Mechatronics Engineering, Department of Thermodynamics, Engines, Thermal and Refrigeration Equipment. This room is equipped with a refrigeration system with mechanical vapour compression (VCRs), which uses R404A as refrigerant. Mechanical vapour compression refrigeration system (VCRs) with an evaporation temperature below 0 oC causes ice to form on the evaporator leading to reduced performance. Currently, the widely used methods for defrosting are the standard methods, the most used being the electric one, which of course consumes energy. This paper aims to evaluate the availability of heat that could be used in the defrosting process by means of PCMs. The study was made using the Engineering Equation Solver software, several types of PCMs and also different refrigerants (R600a, R600, R1234yf, R1234ze, R152a, R290, R32) and in this way it was intended to identify the right agent to be used for a particular type of PCM. Faculty of Mechanical and Mechatronics Engineering, Department of Thermodynamics, Engines, Thermal and Refrigeration Equipment","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47538632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Suhardi, B. Marhaenanto, Bayu Taruna Widjaja Putra, S. Winarso
The water availability in soil strongly influences crop growth by sustaining photosynthesis, respiration, and the maintenance of plant temperature. The water availability will decrease due to crop evapotranspiration (ETc) which is influenced by reference evapotranspiration (ETo) and crop coefficient (Kc). During water shortage, Kc is strongly influenced by soil evaporation coefficient (Ke) and basal crop coefficient (Kcb) which can be calculated using the Blue Red Vegetation Index (BRVI). The purpose of this study was to apply and evaluate a new method of estimating ETo, Ke, and Kcb at a research site using a Deep Neural Network (DNN) with minimum requirements. The results of the ETo estimation using DNN shows a good output with a determinant coefficient (R2) being 0.774. Meanwhile, the estimates of Ke and Kcb show excellent results with the determinant coefficient (R2) being 0.9496 and 0.999 respectively.
{"title":"IoT-BASED EVAPOTRANSPIRATION ESTIMATION OF PEANUT PLANT USING DEEP NEURAL NETWORK","authors":"S. Suhardi, B. Marhaenanto, Bayu Taruna Widjaja Putra, S. Winarso","doi":"10.35633/inmateh-70-47","DOIUrl":"https://doi.org/10.35633/inmateh-70-47","url":null,"abstract":"The water availability in soil strongly influences crop growth by sustaining photosynthesis, respiration, and the maintenance of plant temperature. The water availability will decrease due to crop evapotranspiration (ETc) which is influenced by reference evapotranspiration (ETo) and crop coefficient (Kc). During water shortage, Kc is strongly influenced by soil evaporation coefficient (Ke) and basal crop coefficient (Kcb) which can be calculated using the Blue Red Vegetation Index (BRVI). The purpose of this study was to apply and evaluate a new method of estimating ETo, Ke, and Kcb at a research site using a Deep Neural Network (DNN) with minimum requirements. The results of the ETo estimation using DNN shows a good output with a determinant coefficient (R2) being 0.774. Meanwhile, the estimates of Ke and Kcb show excellent results with the determinant coefficient (R2) being 0.9496 and 0.999 respectively.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41480027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to improve the opener of the seeder and its lightweight structure, a new type of opener is designed. The overall structure and working principle of a single-ditch double-row opener are analyzed, and the structural parameters of machete cutting soil and the soil guide board are designed and optimized. Using the penetration angle of machete cutting soil and the included angle of the soil guide board as test factors, field experiments were conducted. As the test indexes, the working resistance, the sowing coefficient of variation, and the depth coefficient of variation were used to analyze the effect of the opener. The results showed that in terms of working resistance, the penetration angle of the machete cutting edge and the included angle of the soil guide board were extremely significant, and the included angle was greater than the penetration angle regarding the influence degree. In terms of the sowing coefficient of variation, the penetration angle was significant, and the included angle was extremely significant. Regarding the depth coefficient of variation, the penetration angle was extremely significant, and the included angle of the guide soil board was significant. Based on the optimization analysis by using the Design Expert 8.0.6, it is found that the performance of the opener is optimal when the penetration angle and the included angle are 50.03° and 42.36°, respectively. The working resistance, the sowing coefficient of variation, and the depth coefficient of variation are 61.47N, 6.49% and 4.22%, respectively. After verification, the results are basically consistent, and the seeding and trenching performance meets the agronomic requirements. This study can provide a basis and technical reference for the design and development of the ditching technology and opener.
{"title":"DESIGN AND EXPERIMENT ON THE SINGLE-DITCH AND DOUBLE-ROW OPENER FOR NARROW ROW FLAT SEEDER","authors":"Qichao Li, Jinlong Feng, Xianglan Ming","doi":"10.35633/inmateh-70-24","DOIUrl":"https://doi.org/10.35633/inmateh-70-24","url":null,"abstract":"In order to improve the opener of the seeder and its lightweight structure, a new type of opener is designed. The overall structure and working principle of a single-ditch double-row opener are analyzed, and the structural parameters of machete cutting soil and the soil guide board are designed and optimized. Using the penetration angle of machete cutting soil and the included angle of the soil guide board as test factors, field experiments were conducted. As the test indexes, the working resistance, the sowing coefficient of variation, and the depth coefficient of variation were used to analyze the effect of the opener. The results showed that in terms of working resistance, the penetration angle of the machete cutting edge and the included angle of the soil guide board were extremely significant, and the included angle was greater than the penetration angle regarding the influence degree. In terms of the sowing coefficient of variation, the penetration angle was significant, and the included angle was extremely significant. Regarding the depth coefficient of variation, the penetration angle was extremely significant, and the included angle of the guide soil board was significant. Based on the optimization analysis by using the Design Expert 8.0.6, it is found that the performance of the opener is optimal when the penetration angle and the included angle are 50.03° and 42.36°, respectively. The working resistance, the sowing coefficient of variation, and the depth coefficient of variation are 61.47N, 6.49% and 4.22%, respectively. After verification, the results are basically consistent, and the seeding and trenching performance meets the agronomic requirements. This study can provide a basis and technical reference for the design and development of the ditching technology and opener.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47106423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shenghe BAI, Yanwei YUAN, Gaoyong XING, Liang WEI, Kang NIU, Liming ZHOU, Bo ZHAO, Liguo WEI, Lijing LIU
To realize real-time monitoring of film laying process of cotton precision planter and improve intelligent level of cotton precision planter, based on advanced morphological filtering method and graphical programming of Labview software, a film laying quality monitoring system of cotton precision planter is designed. Using the Vision Assistant visual assistant, the system uses a color extraction function to convert colors to grayscale images. It uses LOOKup Table function and FFT filter function to perform grayscale transformation, binarization and advanced morphological filtering on it respectively. It then uses basic morphology to acquire various components in the plastic film image. It realizes the monitoring of parameters such as the width of the daylighting surface, the side length or seam length of the mechanical damaged part, and the width of the film edge covering soil. The performance test results of the film laying quality monitoring system showed that the system worked stably and reliably, the average monitoring accuracy of the width of the lighting surface and the width of the film edge covering soil reached more than 95%, and the average monitoring accuracy of the side length or the length of the seam at the mechanical damage part reached more than 88%. It solved the problems of difficulty in recognizing the similarity between the plastic film and the background interferer (soil, etc.) and could accurately detect the quality of the cotton film in real time. It effectively improved the operation quality and working efficiency of the cotton precision planter and met the practical requirements of film laying monitoring.
{"title":"DESIGN AND EXPERIMENT OF FILM LAYING QUALITY MONITORING SYSTEM FOR COTTON PRECISION PLANTER","authors":"Shenghe BAI, Yanwei YUAN, Gaoyong XING, Liang WEI, Kang NIU, Liming ZHOU, Bo ZHAO, Liguo WEI, Lijing LIU","doi":"10.35633/inmateh-70-37","DOIUrl":"https://doi.org/10.35633/inmateh-70-37","url":null,"abstract":"To realize real-time monitoring of film laying process of cotton precision planter and improve intelligent level of cotton precision planter, based on advanced morphological filtering method and graphical programming of Labview software, a film laying quality monitoring system of cotton precision planter is designed. Using the Vision Assistant visual assistant, the system uses a color extraction function to convert colors to grayscale images. It uses LOOKup Table function and FFT filter function to perform grayscale transformation, binarization and advanced morphological filtering on it respectively. It then uses basic morphology to acquire various components in the plastic film image. It realizes the monitoring of parameters such as the width of the daylighting surface, the side length or seam length of the mechanical damaged part, and the width of the film edge covering soil. The performance test results of the film laying quality monitoring system showed that the system worked stably and reliably, the average monitoring accuracy of the width of the lighting surface and the width of the film edge covering soil reached more than 95%, and the average monitoring accuracy of the side length or the length of the seam at the mechanical damage part reached more than 88%. It solved the problems of difficulty in recognizing the similarity between the plastic film and the background interferer (soil, etc.) and could accurately detect the quality of the cotton film in real time. It effectively improved the operation quality and working efficiency of the cotton precision planter and met the practical requirements of film laying monitoring.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136337186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chen YAN, Wenxia ZHANG, Guo HUA, Fu SHI, Zhang RUI, Zhang MING
In the process of revegetation of degraded grassland by pneumatic seed sprayer, the working parameters of the sprayer, such as the position of the sprayer and the air velocity of the inlet of the sprayer, have an impact on the uniformity of spraying. In this paper, 4BQD-40C pneumatic sprayer is taken as the research object. The influence of the compensation mechanism on the airflow velocity at the inlet of the barrel nozzle and the spraying quality is analyzed. The conclusions show that: (1) The planting trajectory of the sprayer inlet compensation mechanism is analyzed, and the planting trajectory equation is obtained, which lays a foundation for subsequent research. (2) The influence law of the opening height on the inlet airflow velocity of the nozzle is obtained, and the drop trajectory is adjusted by adjusting the inlet airflow velocity of the nozzle, and the area of the missed seeding area is reduced. (3) The time points of opening height adjustment and reset of the compensation mechanism in one cycle were obtained. At the same time, there is a lag time t1 due to changing the seed drop trajectory by adjusting the nozzle inlet airflow velocity. Due to this lag time, the compensation mechanism can be used to change the seed drop trajectory when the swing frequency is less than 7.3 min-1 to achieve optimization of the reseeded and missed seeding areas.
{"title":"ANALYSIS ON THE UNIFORMITY OF SEED SOWING IN THE SPRAYING MACHINE OPERATING ON THE GRASSLAND","authors":"Chen YAN, Wenxia ZHANG, Guo HUA, Fu SHI, Zhang RUI, Zhang MING","doi":"10.35633/inmateh-70-09","DOIUrl":"https://doi.org/10.35633/inmateh-70-09","url":null,"abstract":"In the process of revegetation of degraded grassland by pneumatic seed sprayer, the working parameters of the sprayer, such as the position of the sprayer and the air velocity of the inlet of the sprayer, have an impact on the uniformity of spraying. In this paper, 4BQD-40C pneumatic sprayer is taken as the research object. The influence of the compensation mechanism on the airflow velocity at the inlet of the barrel nozzle and the spraying quality is analyzed. The conclusions show that: (1) The planting trajectory of the sprayer inlet compensation mechanism is analyzed, and the planting trajectory equation is obtained, which lays a foundation for subsequent research. (2) The influence law of the opening height on the inlet airflow velocity of the nozzle is obtained, and the drop trajectory is adjusted by adjusting the inlet airflow velocity of the nozzle, and the area of the missed seeding area is reduced. (3) The time points of opening height adjustment and reset of the compensation mechanism in one cycle were obtained. At the same time, there is a lag time t1 due to changing the seed drop trajectory by adjusting the nozzle inlet airflow velocity. Due to this lag time, the compensation mechanism can be used to change the seed drop trajectory when the swing frequency is less than 7.3 min-1 to achieve optimization of the reseeded and missed seeding areas.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136337187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Junming Hou, Zhaotan Ren, Hongjie Zhu, Zhi Rende, Wei Wang
Castor is one of the important oil crop, the shelling process of which directly affects the quality of castor seeds. In the process of shelling, the shelling force of castor is an important index to study its damage. The castor capsule model was established and the shelling test machine was established based on the discrete element method. Then the extrusion law of castor capsule during shelling was analyzed. The shelling process is divided into three stages, which are the Initial stage, stable shelling stage and the final stage. The force law of shelling process is analyzed. The results show that with the increase of rotating speed, the maximum force decreases from 68.78 to 68.10 N, the maximum speed increases from 8.92 to 12.99 m/s, the force of inner drum increases from 509.34 to 533.14 N, and then decreases to 456.15 N. The shelling increases from 91.23% to 91.28%, and then decreases to 88.89%. With the increase of filling amount, the maximum force increases from 55.86 to 76.93 N, the maximum speed decreases from 12.99 to 10.86 m/s, the force of inner drum increases from 338.58 to 603.364 N, and the shelling rate changes from 91% to 90.05%. This study can provide theoretical support for the design of castor shelling machine.
{"title":"SIMULATION AND EXPERIMENT ON THE PROCESS OF CASTOR SHELLING BASED ON DISCRETE ELEMENT METHOD","authors":"Junming Hou, Zhaotan Ren, Hongjie Zhu, Zhi Rende, Wei Wang","doi":"10.35633/inmateh-70-04","DOIUrl":"https://doi.org/10.35633/inmateh-70-04","url":null,"abstract":"Castor is one of the important oil crop, the shelling process of which directly affects the quality of castor seeds. In the process of shelling, the shelling force of castor is an important index to study its damage. The castor capsule model was established and the shelling test machine was established based on the discrete element method. Then the extrusion law of castor capsule during shelling was analyzed. The shelling process is divided into three stages, which are the Initial stage, stable shelling stage and the final stage. The force law of shelling process is analyzed. The results show that with the increase of rotating speed, the maximum force decreases from 68.78 to 68.10 N, the maximum speed increases from 8.92 to 12.99 m/s, the force of inner drum increases from 509.34 to 533.14 N, and then decreases to 456.15 N. The shelling increases from 91.23% to 91.28%, and then decreases to 88.89%. With the increase of filling amount, the maximum force increases from 55.86 to 76.93 N, the maximum speed decreases from 12.99 to 10.86 m/s, the force of inner drum increases from 338.58 to 603.364 N, and the shelling rate changes from 91% to 90.05%. This study can provide theoretical support for the design of castor shelling machine.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69904296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carlos Montes-Rodríguez, M. Herrera-Suárez, María LÓPEZ-ZAMORA, Julio PÉREZ-GUERRERO, Roberto Torres-Rodríguez
For tagua, the quality of the polishing process is analyzed according to the surface finish of the material, which is obtained manually or through empirically developed machinery that does not include the study of the behavior of the material during the process, which generates an inefficient work. The objective of the work is to determine the macro structural properties of tagua nuts to simulate polishing using the discrete element method. Virtual models were developed and the corresponding physical and mechanical properties were assigned. Among the main results, a tagua nut model was achieved, with m=30.22 g and ρ=1327.3±11.23 kg/m3, friction coefficient for wood of µ_e = 0.411±0.0006 and angle of repose of β=24.644º±0.201º. These properties are the variables used as input data for the DEM model. Finally, the suitability of the Hertz-Mindlin model to simulate the process of mechanized polishing of tagua nuts is demonstrated.
{"title":"DEM COMPUTATIONAL SIMULATION OF THE POLISHING OF THE TAGUA (PHYTELEPHAS AEQUATORIALIS) PALM NUTS","authors":"Carlos Montes-Rodríguez, M. Herrera-Suárez, María LÓPEZ-ZAMORA, Julio PÉREZ-GUERRERO, Roberto Torres-Rodríguez","doi":"10.35633/inmateh-70-29","DOIUrl":"https://doi.org/10.35633/inmateh-70-29","url":null,"abstract":"For tagua, the quality of the polishing process is analyzed according to the surface finish of the material, which is obtained manually or through empirically developed machinery that does not include the study of the behavior of the material during the process, which generates an inefficient work. The objective of the work is to determine the macro structural properties of tagua nuts to simulate polishing using the discrete element method. Virtual models were developed and the corresponding physical and mechanical properties were assigned. Among the main results, a tagua nut model was achieved, with m=30.22 g and ρ=1327.3±11.23 kg/m3, friction coefficient for wood of µ_e = 0.411±0.0006 and angle of repose of β=24.644º±0.201º. These properties are the variables used as input data for the DEM model. Finally, the suitability of the Hertz-Mindlin model to simulate the process of mechanized polishing of tagua nuts is demonstrated.","PeriodicalId":44197,"journal":{"name":"INMATEH-Agricultural Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69904307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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