Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66382
I. Bartenev
The main preparation of the soil for protective forest plantations on agricultural fields and tractor pass of gully slopes with the steepness up to 12° in the regions of insufficient and unstable moistening is characterized by a low degree of crumbling of the soil layer, when using plows , high energy and material intensity, multi-operation (plowing, deep loosening, destruction of soil blocks). Plowing across slopes with a steepness of more than 4-6° is made only under a slope, i.e. each working stroke is idle, and this reduces the productivity. The design of a combined tillage machine is offered, it is the hinged ripper plow PRN-40, replacing plows of general purpose PLN-4-35 and the plant PPN-40, the hinged ripper RN-80, the cultivator KRT-3 or the heavy disc harrow BDNT-3, which produces a deep layered cultivation of the soil (plowing to a depth of 25...27 cm and loosening the subsoil layer by 25...40 cm) and active circulation of the soil layer both downward and upward along the slope to 12...15 °; excluding additional treatment for the purpose of destroying soil blocks. In the plow-ripper PRN-40, the working parts of the passive (the body with the shortened blade and the deep cutter) and the active (rotary ripper) operation are used. They use power of the tractor engine through its propulsors and PTO separating the plowing process into separate operations performed at different rates of impact and subject to a layer of various non-energy-intensive types of deformation.
{"title":"Combined tillage machine for protective afforestation","authors":"I. Bartenev","doi":"10.17816/0321-4443-66382","DOIUrl":"https://doi.org/10.17816/0321-4443-66382","url":null,"abstract":"The main preparation of the soil for protective forest plantations on agricultural fields and tractor pass of gully slopes with the steepness up to 12° in the regions of insufficient and unstable moistening is characterized by a low degree of crumbling of the soil layer, when using plows , high energy and material intensity, multi-operation (plowing, deep loosening, destruction of soil blocks). Plowing across slopes with a steepness of more than 4-6° is made only under a slope, i.e. each working stroke is idle, and this reduces the productivity. The design of a combined tillage machine is offered, it is the hinged ripper plow PRN-40, replacing plows of general purpose PLN-4-35 and the plant PPN-40, the hinged ripper RN-80, the cultivator KRT-3 or the heavy disc harrow BDNT-3, which produces a deep layered cultivation of the soil (plowing to a depth of 25...27 cm and loosening the subsoil layer by 25...40 cm) and active circulation of the soil layer both downward and upward along the slope to 12...15 °; excluding additional treatment for the purpose of destroying soil blocks. In the plow-ripper PRN-40, the working parts of the passive (the body with the shortened blade and the deep cutter) and the active (rotary ripper) operation are used. They use power of the tractor engine through its propulsors and PTO separating the plowing process into separate operations performed at different rates of impact and subject to a layer of various non-energy-intensive types of deformation.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"173 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131824498","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}
Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66378
N. Rudenko, E. Kulaev, V. N. Rudenko, A. V. Seminskij
Coulters are installed for cutting sowing grooves on the seeding-machines. The most common are disk, keeled, razor-shaped, rocker coulters. The disadvantage of disc and razor-shaped coulters is the formation of the unsealed bottom of the sowing groove, which contradicts the agrotechnical requirements. According to the recommendations, pre-sowing soil cultivation should be conducted no later than a day before sowing. However, it is practically impossible to sustain this over the whole area. Weeds appear at the period between the presowing treatment and sowing. According to the known data of Russian and foreign scientists, if, for example, weeds are not removed in tomato crops in the first 10 days, yields are reduced to 50 %. Therefore, the coulter must be equipped with a weed plow. The seed bud must penetrate as soon as possible into the lower layers of the soil and provide seed buds with water and nutrition. This task is solved by slicing when sowing the underseed gap. The field germination is ensured by close contact of the seed with the soil. Now this is achieved by installing a rolling compactor behind the coulters. However, surface compaction of the soil makes it difficult for seedlings to leave the day surface. In addition, moisture is pulled up and the weed seeds located in the upper layer, where the soil temperature is higher, grow quickly. We do not need a soil compactor, but an action directly on the seeds, ensuring their close contact with the soil. A multifunctional coulter, that has a share with 80 mm-wide shank, which is able to make seed drill of 25 mm width, a spring bar slitter for slicing underseed slit and a 3 mm diameter rod seal to ensure seed contact with the soil, was developed. Descending from the column dry soil covers groove with a thin 15...20 mm layer.
{"title":"Multifunctional coulter of a tilled seeding-machine","authors":"N. Rudenko, E. Kulaev, V. N. Rudenko, A. V. Seminskij","doi":"10.17816/0321-4443-66378","DOIUrl":"https://doi.org/10.17816/0321-4443-66378","url":null,"abstract":"Coulters are installed for cutting sowing grooves on the seeding-machines. The most common are disk, keeled, razor-shaped, rocker coulters. The disadvantage of disc and razor-shaped coulters is the formation of the unsealed bottom of the sowing groove, which contradicts the agrotechnical requirements. According to the recommendations, pre-sowing soil cultivation should be conducted no later than a day before sowing. However, it is practically impossible to sustain this over the whole area. Weeds appear at the period between the presowing treatment and sowing. According to the known data of Russian and foreign scientists, if, for example, weeds are not removed in tomato crops in the first 10 days, yields are reduced to 50 %. Therefore, the coulter must be equipped with a weed plow. The seed bud must penetrate as soon as possible into the lower layers of the soil and provide seed buds with water and nutrition. This task is solved by slicing when sowing the underseed gap. The field germination is ensured by close contact of the seed with the soil. Now this is achieved by installing a rolling compactor behind the coulters. However, surface compaction of the soil makes it difficult for seedlings to leave the day surface. In addition, moisture is pulled up and the weed seeds located in the upper layer, where the soil temperature is higher, grow quickly. We do not need a soil compactor, but an action directly on the seeds, ensuring their close contact with the soil. A multifunctional coulter, that has a share with 80 mm-wide shank, which is able to make seed drill of 25 mm width, a spring bar slitter for slicing underseed slit and a 3 mm diameter rod seal to ensure seed contact with the soil, was developed. Descending from the column dry soil covers groove with a thin 15...20 mm layer.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115805616","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}
Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66364
R. H. Zaripov, V. Nikishin, A. Kulikov
Nowadays one of the most urgent problems of creating modern combustion engines (ICE) is the problem of ecology. Ensuring environmental requirements is usually associated with the introduction of new structural elements or the modernization of existing structures, since practice shows that the use of traditional methods to reduce the toxicity of exhaust gases, leads to a gradual deterioration in the fuel economy of the engine. This article discusses the use and development of an exhaust gas recirculation system for a transport diesel as the most effective means of reducing NOx emissions into the environment. On the example of expert data, the experience of using exhaust gas recirculation systems in diesel engines is considered, and their main advantages and disadvantages are given. The use of «cooled» exhaust gas recirculation is more preferable than «uncooled», since the filling of the cylinders with an air charge improves, and lower gas temperatures during the combustion period are provided, thereby reducing the amount of NOx generators. It is also noted in the work that when a cooled exhaust gas recirculation system is used in conjunction with optimization of engine design and adjustment parameters, NOx emissions are reduced with minimal deterioration of the engine's power and economic parameters. On the example of research and simulations on the testbench of the transport engine 8ChN 12/13, the efficiency of the exhaust gas recirculation system on diesel has been estimated and all the necessary data was provided. Due to the optimization of the adjusting parameters and the developed model of the exhaust gas recirculation system, it was possible to achieve 46 % reduction in NOx emissions. It has been shown experimentally that the use in a diesel engine of a theoretically developed organization of working processes with the use of recirculation of exhaust gases and the characteristics of controlling the main adjustments of the combustion process is advisable.
{"title":"Analysis and development of the heat exchanger for the exhaust gas recirculation system of the transport diesel engine","authors":"R. H. Zaripov, V. Nikishin, A. Kulikov","doi":"10.17816/0321-4443-66364","DOIUrl":"https://doi.org/10.17816/0321-4443-66364","url":null,"abstract":"Nowadays one of the most urgent problems of creating modern combustion engines (ICE) is the problem of ecology. Ensuring environmental requirements is usually associated with the introduction of new structural elements or the modernization of existing structures, since practice shows that the use of traditional methods to reduce the toxicity of exhaust gases, leads to a gradual deterioration in the fuel economy of the engine. This article discusses the use and development of an exhaust gas recirculation system for a transport diesel as the most effective means of reducing NOx emissions into the environment. On the example of expert data, the experience of using exhaust gas recirculation systems in diesel engines is considered, and their main advantages and disadvantages are given. The use of «cooled» exhaust gas recirculation is more preferable than «uncooled», since the filling of the cylinders with an air charge improves, and lower gas temperatures during the combustion period are provided, thereby reducing the amount of NOx generators. It is also noted in the work that when a cooled exhaust gas recirculation system is used in conjunction with optimization of engine design and adjustment parameters, NOx emissions are reduced with minimal deterioration of the engine's power and economic parameters. On the example of research and simulations on the testbench of the transport engine 8ChN 12/13, the efficiency of the exhaust gas recirculation system on diesel has been estimated and all the necessary data was provided. Due to the optimization of the adjusting parameters and the developed model of the exhaust gas recirculation system, it was possible to achieve 46 % reduction in NOx emissions. It has been shown experimentally that the use in a diesel engine of a theoretically developed organization of working processes with the use of recirculation of exhaust gases and the characteristics of controlling the main adjustments of the combustion process is advisable.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127118640","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}
Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66393
A. Kem, V. L. Miklashevich
The determining factor for increasing the yield of agricultural crops is the quality of sowing, which is ensured by the coordinated work of the system: the sowing apparatus - seed pipe - coulter. The task of the sowing device is to consistently give out a given number of seeds to the seed pipe by the area of supply for this method of sowing. Serial seeders do not provide the minimum sufficient seeding rate for small-seed crops, which leads to overspending of expensive, scarce seeds and reduced yields due to thickening of the crop. Based on the results of the theoretical studies and physical modeling, a vertical disc seeder was developed, which ensures the seeding of small-seed crops. The sowing apparatus represents a disc with a diameter of 93 mm along the outer perimeter, which contains cells in the form of a sector of a semicircle with a radius of 3 mm, a depth of 2 mm. Laboratory studies on alfalfa seeds showed that when the disc rotates, the seeds begin to fall out of the cell under their own weight, when the cell is at an angle of 35° with respect to the horizontal line. To carry out field research, a seeder was built on a frame, in which seven seed sections with individual bunkers were installed in two rows. Seeding width is 0.9 m. The drive of the sowing units is carried out by chain transfer from the support wheel through the gearbox. The sowing discs are connected to the shafts by individual couplings, which made it possible to sow with a different width of the rows. The field experiment was conducted on the sowing of the zoned alfalfa Omskaya-7 with inter-row spacing of 0,15 m, 0,60 m, and 0,90 m in triplicate repetition. According to the results of the field experiment, it was found that the sowing disc with cells with a radius of 3 mm and a depth of 2 mm of 8 pieces on the disc, and its rotation frequency of 1,53 rpm, when sowing with different rows, consistently provided for 1 meter of sowing on average 33 plants at field germination of 84,4 %.
{"title":"Sowing vertical-disc apparatus for seeding small-seed crops","authors":"A. Kem, V. L. Miklashevich","doi":"10.17816/0321-4443-66393","DOIUrl":"https://doi.org/10.17816/0321-4443-66393","url":null,"abstract":"The determining factor for increasing the yield of agricultural crops is the quality of sowing, which is ensured by the coordinated work of the system: the sowing apparatus - seed pipe - coulter. The task of the sowing device is to consistently give out a given number of seeds to the seed pipe by the area of supply for this method of sowing. Serial seeders do not provide the minimum sufficient seeding rate for small-seed crops, which leads to overspending of expensive, scarce seeds and reduced yields due to thickening of the crop. Based on the results of the theoretical studies and physical modeling, a vertical disc seeder was developed, which ensures the seeding of small-seed crops. The sowing apparatus represents a disc with a diameter of 93 mm along the outer perimeter, which contains cells in the form of a sector of a semicircle with a radius of 3 mm, a depth of 2 mm. Laboratory studies on alfalfa seeds showed that when the disc rotates, the seeds begin to fall out of the cell under their own weight, when the cell is at an angle of 35° with respect to the horizontal line. To carry out field research, a seeder was built on a frame, in which seven seed sections with individual bunkers were installed in two rows. Seeding width is 0.9 m. The drive of the sowing units is carried out by chain transfer from the support wheel through the gearbox. The sowing discs are connected to the shafts by individual couplings, which made it possible to sow with a different width of the rows. The field experiment was conducted on the sowing of the zoned alfalfa Omskaya-7 with inter-row spacing of 0,15 m, 0,60 m, and 0,90 m in triplicate repetition. According to the results of the field experiment, it was found that the sowing disc with cells with a radius of 3 mm and a depth of 2 mm of 8 pieces on the disc, and its rotation frequency of 1,53 rpm, when sowing with different rows, consistently provided for 1 meter of sowing on average 33 plants at field germination of 84,4 %.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"31 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120903467","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}
Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66387
A. Podzorov
Complex mechanization of selection and experimental works allow to significantly increase the volume of obtaining high-quality seeds and improve the efficiency of all breeding activities. During the harvesting of crops, from the plots everyday up to 5000 items in bunches and up to 1500 pieces of beets are harvested. The total weight of the harvest per day is within 500 kg. Harvesting of plants from the plots of the first stage is carried out manually by cutting the plants with a sickle, scissors or pulling out with the root system. The number of samples requiring analysis for the season is estimated by many thousands, for example, only in selection nurseries are prepared for each crop up to 15-20 thousand plants. This is the most time-consuming operation in breeding. The number of plots in the II stage also reaches several thousand pieces for each crop. The attempt to mechanize the cleaning of single-breed plots at the I-II stages, both in Russia and abroad, has not yet yielded results for mass and effective application. In this regard, the VIM started developing a new domestic technical means for harvesting grain crops at the I-II stage of breeding in 2011 to reduce the cost of the technological process in primary seed production using elements of existing mowers and trimmers. Prototype of the new mowers under the brand name ТС-0,2 was made by MZOK VIM plant. Taking into account the accumulated experience in the study of the ТС-0.2, in 2017, the work on its modernization was carried out in the VIM. In addition to the elimination of deficiencies in the design introduced additional elements to improve the work such as the table-flooring for cut stems. The technical parameters of the trimmer are justified on the basis of physical and mechanical, dimensional and morphological properties and characteristics of the stem of the selection crops, the size of the selection plots and the size of the stems in a row. Harvesting machines of this type are quite popular, but, unfortunately, their production is not mass and this does not allow to organize their mass production.
{"title":"Substantiation of the construction of the mower for the I-II stages of breeding works","authors":"A. Podzorov","doi":"10.17816/0321-4443-66387","DOIUrl":"https://doi.org/10.17816/0321-4443-66387","url":null,"abstract":"Complex mechanization of selection and experimental works allow to significantly increase the volume of obtaining high-quality seeds and improve the efficiency of all breeding activities. During the harvesting of crops, from the plots everyday up to 5000 items in bunches and up to 1500 pieces of beets are harvested. The total weight of the harvest per day is within 500 kg. Harvesting of plants from the plots of the first stage is carried out manually by cutting the plants with a sickle, scissors or pulling out with the root system. The number of samples requiring analysis for the season is estimated by many thousands, for example, only in selection nurseries are prepared for each crop up to 15-20 thousand plants. This is the most time-consuming operation in breeding. The number of plots in the II stage also reaches several thousand pieces for each crop. The attempt to mechanize the cleaning of single-breed plots at the I-II stages, both in Russia and abroad, has not yet yielded results for mass and effective application. In this regard, the VIM started developing a new domestic technical means for harvesting grain crops at the I-II stage of breeding in 2011 to reduce the cost of the technological process in primary seed production using elements of existing mowers and trimmers. Prototype of the new mowers under the brand name ТС-0,2 was made by MZOK VIM plant. Taking into account the accumulated experience in the study of the ТС-0.2, in 2017, the work on its modernization was carried out in the VIM. In addition to the elimination of deficiencies in the design introduced additional elements to improve the work such as the table-flooring for cut stems. The technical parameters of the trimmer are justified on the basis of physical and mechanical, dimensional and morphological properties and characteristics of the stem of the selection crops, the size of the selection plots and the size of the stems in a row. Harvesting machines of this type are quite popular, but, unfortunately, their production is not mass and this does not allow to organize their mass production.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124790489","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}
Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66420
N. Dzhabborov, V. Shkrabak
The random nature of the load is the main cause of deterioration of energy parameters and technical and economic indicators of machine-tractor units (MTU). Oscillations of the load lead to an increase in energy costs for technological processes. Direct fuel and energy costs should be determined and predicted with a high degree of reliability, taking into account the specifics of the work of the MTU and the dynamics of its performance of technological processes. The identification and optimization of energy costs of the MTU will ensure an increase in the efficiency of the technological processes and technologies of cultivation in crop production. The subject of the study is the development of mathematical models for determining and optimizing the direct energy costs of MTU equipped with advanced gas turbine engine (GTE) engines. The purpose of the research is to develop a methodology for determining the direct fuel and energy costs of MTU, taking into account the probabilistic nature of the load. The novelty of the research consists in the developed mathematical models and calculation algorithm, as well as optimization of the direct fuel and energy costs of MTU with GTE. The proposed methodology is developed on the basis of a systematic approach, generalization, and analysis of experimental data, mathematical modeling of processes. Experimental studies were carried out in laboratory facilities and in the field using modern measuring instruments and recording experimental data. The proposed methodology allows, with a probability of 0,90-0,95, to predict the optimal values of the direct fuel and energy costs of the MTU with GTE. As an example, the article gives examples of calculation and optimization of direct fuel and energy costs of plowing unit consisting of a Kirovets tractor with a GTD-350T gas turbine engine and a PNI-8/9-40 plow at various levels of turbocharger speed. It is established that at the 100 % level of the turbo compressor speed and the variation of the load variation coefficient from 0 to 0,333, the optimal values of the direct fuel and energy costs of the plowing unit increase from 543,0 to 723,12 MJ/ha. The same trend of increasing the direct fuel and energy costs of MTU is also observed in other levels of implementation of the turbo GTE turbocharger speed. It should be noted that with a decrease in the level of implementation of the turbocharger GTE's speed, direct fuel, and energy costs are increasing. The proposed methodology allows to determine and optimize the values of direct fuel and energy costs of MTU with GTE taking into account the probabilistic nature of the load under the specific conditions of their operation.
{"title":"The methodology for determining of the energy costs for the probabilistic nature of the load of a machine-tractor unit","authors":"N. Dzhabborov, V. Shkrabak","doi":"10.17816/0321-4443-66420","DOIUrl":"https://doi.org/10.17816/0321-4443-66420","url":null,"abstract":"The random nature of the load is the main cause of deterioration of energy parameters and technical and economic indicators of machine-tractor units (MTU). Oscillations of the load lead to an increase in energy costs for technological processes. Direct fuel and energy costs should be determined and predicted with a high degree of reliability, taking into account the specifics of the work of the MTU and the dynamics of its performance of technological processes. The identification and optimization of energy costs of the MTU will ensure an increase in the efficiency of the technological processes and technologies of cultivation in crop production. The subject of the study is the development of mathematical models for determining and optimizing the direct energy costs of MTU equipped with advanced gas turbine engine (GTE) engines. The purpose of the research is to develop a methodology for determining the direct fuel and energy costs of MTU, taking into account the probabilistic nature of the load. The novelty of the research consists in the developed mathematical models and calculation algorithm, as well as optimization of the direct fuel and energy costs of MTU with GTE. The proposed methodology is developed on the basis of a systematic approach, generalization, and analysis of experimental data, mathematical modeling of processes. Experimental studies were carried out in laboratory facilities and in the field using modern measuring instruments and recording experimental data. The proposed methodology allows, with a probability of 0,90-0,95, to predict the optimal values of the direct fuel and energy costs of the MTU with GTE. As an example, the article gives examples of calculation and optimization of direct fuel and energy costs of plowing unit consisting of a Kirovets tractor with a GTD-350T gas turbine engine and a PNI-8/9-40 plow at various levels of turbocharger speed. It is established that at the 100 % level of the turbo compressor speed and the variation of the load variation coefficient from 0 to 0,333, the optimal values of the direct fuel and energy costs of the plowing unit increase from 543,0 to 723,12 MJ/ha. The same trend of increasing the direct fuel and energy costs of MTU is also observed in other levels of implementation of the turbo GTE turbocharger speed. It should be noted that with a decrease in the level of implementation of the turbocharger GTE's speed, direct fuel, and energy costs are increasing. The proposed methodology allows to determine and optimize the values of direct fuel and energy costs of MTU with GTE taking into account the probabilistic nature of the load under the specific conditions of their operation.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121190827","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}
Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66409
V. Gorelov, A. Komissarov, D. Vdovin, S. V. Gaev, M. Vyaznikov, I. Taratorkin
The wide use of the finite element method for the strength analysis of the undercarriage elements requires a reliable method of the load's calculation. Conventional analytical method of the load's calculation does not take into account their redistribution due to the kinematics and dynamics of the elements. An alternative option is the numerical dynamic analysis with the use of the spatial dynamical models taking into account kinematics and flexibility of the undercarriage elements. The article describes a method of the strength analysis of a tracked vehicle undercarriage for the case of a track-type tractor with gross weight 72 ton. The method is based on the combination of the undercarriage multibody model for the simulation of the loads in typical operation modes and finite element models of its parts for calculation of the strain-stress and margin of safety in each load case. The undercarriage is described as a set of rigid bodies connected by springs and dampers at all interaction points between the undercarriage elements, the track-shoes, and the ground. The loads on the undercarriage are calculated by the numerical integration of the equations of motion. The time histories of the loads are used for the detection of the static strength critical load cases. Each critical load is transmitted to the finite element models of the analyzed undercarriage parts for the subsequent strength analysis. The method is demonstrated for the «tractor forward pitch during the lifting of the earthmoving blade» and «tractor moving over a single rail» load cases. The article shows the analysis of the time histories of the bogie loads. The authors discuss issues of the load transmission from the multibody model to the finite element models of the undercarriage parts and demonstrate some results of the strength analysis of the bogie.
{"title":"Method of the strength analysis of a track-type tractor undercarriage with the use of multibody simulation and fininte element analysis","authors":"V. Gorelov, A. Komissarov, D. Vdovin, S. V. Gaev, M. Vyaznikov, I. Taratorkin","doi":"10.17816/0321-4443-66409","DOIUrl":"https://doi.org/10.17816/0321-4443-66409","url":null,"abstract":"The wide use of the finite element method for the strength analysis of the undercarriage elements requires a reliable method of the load's calculation. Conventional analytical method of the load's calculation does not take into account their redistribution due to the kinematics and dynamics of the elements. An alternative option is the numerical dynamic analysis with the use of the spatial dynamical models taking into account kinematics and flexibility of the undercarriage elements. The article describes a method of the strength analysis of a tracked vehicle undercarriage for the case of a track-type tractor with gross weight 72 ton. The method is based on the combination of the undercarriage multibody model for the simulation of the loads in typical operation modes and finite element models of its parts for calculation of the strain-stress and margin of safety in each load case. The undercarriage is described as a set of rigid bodies connected by springs and dampers at all interaction points between the undercarriage elements, the track-shoes, and the ground. The loads on the undercarriage are calculated by the numerical integration of the equations of motion. The time histories of the loads are used for the detection of the static strength critical load cases. Each critical load is transmitted to the finite element models of the analyzed undercarriage parts for the subsequent strength analysis. The method is demonstrated for the «tractor forward pitch during the lifting of the earthmoving blade» and «tractor moving over a single rail» load cases. The article shows the analysis of the time histories of the bogie loads. The authors discuss issues of the load transmission from the multibody model to the finite element models of the undercarriage parts and demonstrate some results of the strength analysis of the bogie.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117270698","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}
Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66371
V. A. Lihanov, O. Lopatin
The article deals with the use of natural gas and alcohol-fuel emulsions as an alternative fuel for tractor diesel. A distinctive feature of the processes of mixture formation and combustion in a diesel operating on natural gas with a burning portion of diesel fuel, and alcohol-fuel emulsions, will be compared with the diesel process heterogeneity of the fuel mixture in terms of cylinder volume, there is a completely different fuel evaporation and no coincidence in time of the processes of formation of fuel-air mixture and its combustion. Consequently, the use of alternative fuels with different chemical composition and local conditions leads to distinctive indicators of the combustion process. Therefore, for the scientific representation of the actual picture of the combustion process of diesel running on natural gas and alcohol-fuel emulsions, the indexing of its working process and a detailed description of the combustion process is carried out. At the same time, for the indexing of the diesel working process, the composition of alternative fuel was used when working on natural gas: gas-80 %, the ignition portion of diesel fuel-20 %; when working on alcohol-fuel emulsions: alcohol (methanol or ethanol) - 25 %, detergent-dispersing additive succinimide C-5A - 0,5 %, water - 7 %, diesel fuel - 67,5 %. As a result of the experimental studies, the dependences of the influence of the 4F 11,0/12,5 diesel modes on natural gas, natural gas with different degrees of exhaust gas recirculation (used to reduce the content of nitrogen oxides in the exhaust gases), methanol and ethanol fuel emulsions on the combustion process were established. The optimal values of the combustion process parameters during the operation of the diesel engine on alternative fuels of these compositions are determined.
{"title":"Indication of the working process of the tractor diesel working on natural gas and alcohols","authors":"V. A. Lihanov, O. Lopatin","doi":"10.17816/0321-4443-66371","DOIUrl":"https://doi.org/10.17816/0321-4443-66371","url":null,"abstract":"The article deals with the use of natural gas and alcohol-fuel emulsions as an alternative fuel for tractor diesel. A distinctive feature of the processes of mixture formation and combustion in a diesel operating on natural gas with a burning portion of diesel fuel, and alcohol-fuel emulsions, will be compared with the diesel process heterogeneity of the fuel mixture in terms of cylinder volume, there is a completely different fuel evaporation and no coincidence in time of the processes of formation of fuel-air mixture and its combustion. Consequently, the use of alternative fuels with different chemical composition and local conditions leads to distinctive indicators of the combustion process. Therefore, for the scientific representation of the actual picture of the combustion process of diesel running on natural gas and alcohol-fuel emulsions, the indexing of its working process and a detailed description of the combustion process is carried out. At the same time, for the indexing of the diesel working process, the composition of alternative fuel was used when working on natural gas: gas-80 %, the ignition portion of diesel fuel-20 %; when working on alcohol-fuel emulsions: alcohol (methanol or ethanol) - 25 %, detergent-dispersing additive succinimide C-5A - 0,5 %, water - 7 %, diesel fuel - 67,5 %. As a result of the experimental studies, the dependences of the influence of the 4F 11,0/12,5 diesel modes on natural gas, natural gas with different degrees of exhaust gas recirculation (used to reduce the content of nitrogen oxides in the exhaust gases), methanol and ethanol fuel emulsions on the combustion process were established. The optimal values of the combustion process parameters during the operation of the diesel engine on alternative fuels of these compositions are determined.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122204381","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}
Pub Date : 2018-08-15DOI: 10.17816/0321-4443-66405
S. G. Parhomenko, G. G. Parhomenko
The soil-cultivating machine-tractor unit undergoes continuously changing external influences that lead to fluctuations in the speed of movement, slippage of the tractor's driving wheels, loading of the transmission, and increased fuel consumption. The main sources of disturbances that cause the oscillations of the tractor are the unevenness of the traction resistance of the tillers and the unevenness of the field microprofile. The purpose of the research is to improve the process of functioning of the soil-processing machine-tractor unit by modeling of the influence of external action. The mathematical model of the process of operation of a wheeled tractor in the traction mode of operation is a machine-tractor unit in the form of a dynamic system with two input forces, determined by the load on the working elements and the roughness of the relief. The mathematical model includes the equations of the motor and the regulator, the clutch, the power transmission, the driving wheel and the longitudinal-vertical oscillations of the tractor. The solution of the mathematical model of the machine-tractor unit is based on the fourth-order Runge-Kutta numerical integration method at a constant step. Calculations are made for the motion of the unit with periodic sinusoidal disturbances applied to the input of the model. As a result of calculations, it is determined that the effect of the microfield of the field and the traction resistance of the working bodies on the performance of the machine-tractor unit is different. The greatest amplitudes of vertical accelerations are achieved due to the effect of field unevenness. Fluctuations in the speed of movement, hectare fuel consumption, engine torque are caused by the periodic component of traction resistance of low frequency, and slippage and driving torque of the wheels - as well as unevenness of the field microfilm. The average values of the slippage of the tractor's driving wheels and hectare fuel consumption are mainly affected by the oscillations of the traction resistance. The use of diagonal-parallel tires instead of radial makes it possible to reduce the slipping of the tractor's drive wheels from 24 % (when working on serial tires) to 16 % (on test tires) and to reduce the hectare fuel consumption by 6 %.
{"title":"Mathematical modeling of functioning of a tillage machine-tractor unit","authors":"S. G. Parhomenko, G. G. Parhomenko","doi":"10.17816/0321-4443-66405","DOIUrl":"https://doi.org/10.17816/0321-4443-66405","url":null,"abstract":"The soil-cultivating machine-tractor unit undergoes continuously changing external influences that lead to fluctuations in the speed of movement, slippage of the tractor's driving wheels, loading of the transmission, and increased fuel consumption. The main sources of disturbances that cause the oscillations of the tractor are the unevenness of the traction resistance of the tillers and the unevenness of the field microprofile. The purpose of the research is to improve the process of functioning of the soil-processing machine-tractor unit by modeling of the influence of external action. The mathematical model of the process of operation of a wheeled tractor in the traction mode of operation is a machine-tractor unit in the form of a dynamic system with two input forces, determined by the load on the working elements and the roughness of the relief. The mathematical model includes the equations of the motor and the regulator, the clutch, the power transmission, the driving wheel and the longitudinal-vertical oscillations of the tractor. The solution of the mathematical model of the machine-tractor unit is based on the fourth-order Runge-Kutta numerical integration method at a constant step. Calculations are made for the motion of the unit with periodic sinusoidal disturbances applied to the input of the model. As a result of calculations, it is determined that the effect of the microfield of the field and the traction resistance of the working bodies on the performance of the machine-tractor unit is different. The greatest amplitudes of vertical accelerations are achieved due to the effect of field unevenness. Fluctuations in the speed of movement, hectare fuel consumption, engine torque are caused by the periodic component of traction resistance of low frequency, and slippage and driving torque of the wheels - as well as unevenness of the field microfilm. The average values of the slippage of the tractor's driving wheels and hectare fuel consumption are mainly affected by the oscillations of the traction resistance. The use of diagonal-parallel tires instead of radial makes it possible to reduce the slipping of the tractor's drive wheels from 24 % (when working on serial tires) to 16 % (on test tires) and to reduce the hectare fuel consumption by 6 %.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124775049","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}
Pub Date : 2018-06-15DOI: 10.17816/0321-4443-66417
V. Romanov, E. Novikov, A. Bezbabchenko
The rise in the proportion of long fiber in the commodity output of the primary processing enterprises of the fiber flax is an important task, the solution of which is necessary to increase the efficiency of the flax growing. More than half of the losses of long fiber cause a poor quality of preparation of a layer of flax retting to the processing. The technological processes of the existing layer preparation technology can not be adapted to the changed raw material parameters for the roll-up harvesting of the flax. In this regard, the urgency of the development of individual processes and a new technology in general for the preparation of a layer fed to the milling machine of the production line. The main technological process of layer preparation is its thinning. The linear density of the initial layer varies widely. To bring it to a technologically rational value, the equipment must provide a regulation of the coefficient of thinning. It is possible to provide this by using a thinning channel with adjustable cross-section. For its justification in the investigations the aim has been set to determine the influence of the structural and technological factors on the coefficient of thinning of the layer of flax. The investigations were carried out using active experiments on the prototype of this type of thinning channel created in VNIIML. The independent factors were: the linear density of the initial layer; linear velocity of the layer at the output from the thinning channel; height of the channel at the input and output from it. Two versions of the channel implementation are used: from one type of toothed discs with a number of teeth of 40 pieces.; combined - from two types of discs in equal proportion to the number of teeth 40 and 48 pcs. A significant influence on the thinning coefficient of the channel height layer at the input and output, as well as the linear density of the initial layer is determined. The possibility of adjusting the coefficient of thinning the layer by changing the cross-section of the thinning channel. It is established that the number of teeth on the thinning disks and the structure of the thinning channel exert a significant influence on the process of thinning the layer in the channels with free fixation of the stems. Mathematical models that adequately describe the influence on the coefficient of thinning of the investigated factors are presented. Conclusions are formulated about rational parameters of the thinning channel with a controlled cross-section and the expediency of its application for the thinning of the layer of flax.
{"title":"The investigation of thinning of a layer of the long-fibred flax stems in a channel with adjustable cross-section","authors":"V. Romanov, E. Novikov, A. Bezbabchenko","doi":"10.17816/0321-4443-66417","DOIUrl":"https://doi.org/10.17816/0321-4443-66417","url":null,"abstract":"The rise in the proportion of long fiber in the commodity output of the primary processing enterprises of the fiber flax is an important task, the solution of which is necessary to increase the efficiency of the flax growing. More than half of the losses of long fiber cause a poor quality of preparation of a layer of flax retting to the processing. The technological processes of the existing layer preparation technology can not be adapted to the changed raw material parameters for the roll-up harvesting of the flax. In this regard, the urgency of the development of individual processes and a new technology in general for the preparation of a layer fed to the milling machine of the production line. The main technological process of layer preparation is its thinning. The linear density of the initial layer varies widely. To bring it to a technologically rational value, the equipment must provide a regulation of the coefficient of thinning. It is possible to provide this by using a thinning channel with adjustable cross-section. For its justification in the investigations the aim has been set to determine the influence of the structural and technological factors on the coefficient of thinning of the layer of flax. The investigations were carried out using active experiments on the prototype of this type of thinning channel created in VNIIML. The independent factors were: the linear density of the initial layer; linear velocity of the layer at the output from the thinning channel; height of the channel at the input and output from it. Two versions of the channel implementation are used: from one type of toothed discs with a number of teeth of 40 pieces.; combined - from two types of discs in equal proportion to the number of teeth 40 and 48 pcs. A significant influence on the thinning coefficient of the channel height layer at the input and output, as well as the linear density of the initial layer is determined. The possibility of adjusting the coefficient of thinning the layer by changing the cross-section of the thinning channel. It is established that the number of teeth on the thinning disks and the structure of the thinning channel exert a significant influence on the process of thinning the layer in the channels with free fixation of the stems. Mathematical models that adequately describe the influence on the coefficient of thinning of the investigated factors are presented. Conclusions are formulated about rational parameters of the thinning channel with a controlled cross-section and the expediency of its application for the thinning of the layer of flax.","PeriodicalId":136662,"journal":{"name":"Traktory i sel hozmashiny","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115238626","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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