scholarly journals Global trends in the improvement of combine harvesters

2021 ◽  
Vol 282 ◽  
pp. 07008
Author(s):  
V.Ya. Goltyapin ◽  
I.G. Golubev ◽  
D.S. Buklagin
Keyword(s):  
High Performance ◽  
Catalytic Reduction ◽  
Toxic Substances ◽  
Agricultural Technologies ◽  
Global Trends ◽  
Combine Harvester ◽  
Working Bodies ◽  
Combine Harvesters ◽  
Fuel Costs ◽  
Engine Power

It is noted that the use of foreign experience and achievements in the design of domestic machines is one of the effective tools to accelerate the development of agricultural technologies and equipment. The directions of combine harvester improvement and innovations in their designs are given. It was revealed that the most powerful engines (maximum power of 581 kW) are installed on the combine harvesters “Ideal 10” (Fendt company) and “Lexion 8900 Terra Trac” (Claas company). It is shown that the engine power of the most high-performance combine harvesters reached 581 kW. According to the toxicity of exhaust gases, they meet modern requirements. It is found that the technology of selective catalytic reduction SCR is increasingly used in the designs of combine harvesters. They allow to reduce the emissions of toxic substances into the environment by 2-3 times and reduce fuel costs by 40%, as well as the use of natural gas as fuel. It is revealed that the efficiency of using combine harvesters is increased by improving the engines, threshing devices, separation, cleaning, thresher loading and process control systems, working bodies of headers and cutters.

scholarly journals Methods of identifying grain production cost when threshing grain crops in view of the need in combine harvesters and combine operators

2019 ◽  
Vol 49 (2) ◽  
pp. 85-93 ◽  
Author(s):  
G. E. Chepurin ◽  
A. P. Tsegelnik
Keyword(s):  
Crop Yield ◽  
Production Cost ◽  
High Performance ◽  
Operating Speed ◽  
Grain Crops ◽  
Grain Crop ◽  
Combine Harvester ◽  
Definition Of ◽  
Combine Harvesters

The paper presents substantiation of the rational use of combine harvesters’nominal throughput when threshing grain crops with the yield ranging from 0.8 to 5.0 t/ha and over. The main factors that determine nominal throughput of combine harvesters and their operational indicators are identified. The structure andcontents of thetechnological passport of combine harvesters are substantiated, and the algorithm of effective determination of their key operational indicators, based on the passport, are developed. These indicators depend on harvesting technology, grain crop yield, the share of non-grain part in the threshed grain bulk, the coverage of swath headers and direct-cut headers, and the operating speed of combine harvesters. The definition of the term “technological passport of the combine harvester” is given. Maximum and minimum allowable grain crop yield is established for the rational load of combine harvesters threshing at the standard operating speed of7.5 km/hrecommended by the Ministry of Agriculture of theRussian Federation. The existing methods make it possible to determine the operational efficiency of high-performance machinery by operational costs. However, they do not take into account the shortage of human resources when determining production cost of the threshed grain. As a result of the research conducted, the algorithm and techniques of determination of actual grain cost when harvesting grain crops by direct combining and swath harvesting methods are developed taking into account the need in combines of an i-class and combine operators. Production cost of grain threshed on the area of1000 hectarescalculated by the techniques developed, allows to define the minimum estimated and actual grain cost for an i-class combine harvester by direct combining and swath harvesting methods.

scholarly journals Design and technological aspects of spiked cereal combine stripping

2021 ◽  
Vol 285 ◽  
pp. 07001
Author(s):  
Gennady Maslov ◽  
Elena Yudina ◽  
Denis Ushakov ◽  
Gavriil Samurganov
Keyword(s):  
Technology Implementation ◽  
High Performance ◽  
System Research ◽  
High Increase ◽  
Grain Crushing ◽  
Wheel Drive ◽  
Combine Harvester ◽  
Harvesting Process ◽  
Combine Harvesters ◽  
Unit Performance

The article proposes system research of the spiked cereals harvesting process by a combine stripping, when the stripping header and the grain heap clearing are performed by one harvesting unit based on a self-propelled all-wheel drive combine harvester with a modernized design and technological scheme, in contrast to their aggregation by conventional batch-produced harvesters, which do not provide the harvesting quality according to the agrotechnical requirements. The commonly used aggregation of high-performance stripper headers by series combine harvesters, does not give an effect from the technology of combine stripping due to such violations of agrotechnical requirements as grain crushing for up to 1,9 %, its direct losses off the combine for up to 1,5 %, high kernel micro-damage, etc. With the use of a system approach, the design and technological aspects of spiked cereal combine stripping have been proposed, the use of which will eliminate the disadvantages of the used combine stripping while maintaining the high achievements of this technology in increasing labor productivity by 1,4 ... 2,0 times and saving diesel fuel for up to 45 %. In the principles of improving the technology by combine stripping, proposed by the authors, the requirements for its subsystems are given, indicating the main parameters of the stripping header and the combine harvester that aggregates it for clearing an unwinnowed grain heap. The proposed approach will enable to accelerate the spiked cereal stripping technology implementation with a high increase in the harvesting unit performance by 1,4 ... 2,0 times and with a fuel economy for up to 45 %.

MODERN REQUIREMENTS FOR THE TECHNICAL LEVEL OF COMBINE HARVESTERS

2020 ◽  
Vol 4 (141) ◽  
pp. 29-39
Author(s):  
PH.D. CHAPLYGIN ◽  
◽  
SVETLANA DAVYDOVA ◽  
ALEKSEY PODZOROV
Keyword(s):  
High Performance ◽  
Construction Materials ◽  
Research Purpose ◽  
Technical Level ◽  
Industrial Complex ◽  
Global Trends ◽  
Foreign Companies ◽  
Complex Structural ◽  
Information Materials ◽  
Combine Harvesters

To create a high-performance export-oriented sector in the agro-industrial complex, it is necessary to develop domestic innovative technological and technical solutions in agriculture, use advanced technologies for agricultural production, and equip farms with machines of high technical level, reliability and quality. (Research purpose) The research purpose is in studying the compliance of the technical level of domestic combine harvesters with global trends in combine construction. (Materials and methods) Authors studied Rosstat statistical databases, product catalogs of major combine-building enterprises, information materials of Russian and foreign companies and scientific institutions, research reports on this topic, articles and analytical reviews. Authors used the methods of complex structural and dynamic analysis and expert-analytical method of information processing to monitor the technical level of combine harvesters of domestic and foreign production for the period 2015-2018...

scholarly journals The work of the cutting beater in the transition zone threshing and separating devices combine harvesters

2020 ◽  
Vol 175 ◽  
pp. 05014
Author(s):  
Eduard Kozyrev ◽  
Nadezhda Metelkova ◽  
Tatyana Lavrenova ◽  
Irina Homich ◽  
Lyubov Filonenko
Keyword(s):  
Transition Zone ◽  
Combine Harvester ◽  
Working Bodies ◽  
Combine Harvesters

In this article we studied the work of cutting beater in the transition zone of a combine harvester threshing drum. The influence of the parameters of the beater on the reflection of grains in its interaction with the heap flow and feed to the first stage of the straw-cutter is considered. A constructive scheme of the location of the working bodies of the transition zone showed a decrease in losses for straw.

scholarly journals Catalytic production of impurity-free V3.5+ electrolyte for vanadium redox flow batteries

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Jiyun Heo ◽  
Jae-Yun Han ◽  
Soohyun Kim ◽  
Seongmin Yuk ◽  
Chanyong Choi ◽  
...  
Keyword(s):  
High Speed ◽  
High Performance ◽  
Large Scale ◽  
Catalytic Reduction ◽  
Continuous Production ◽  
Vanadium Redox Flow Battery ◽  
Manufacturing Cost ◽  
Chemical Production ◽  
High Manufacturing Cost ◽  
Vanadium Redox

Abstract The vanadium redox flow battery is considered one of the most promising candidates for use in large-scale energy storage systems. However, its commercialization has been hindered due to the high manufacturing cost of the vanadium electrolyte, which is currently prepared using a costly electrolysis method with limited productivity. In this work, we present a simpler method for chemical production of impurity-free V3.5+ electrolyte by utilizing formic acid as a reducing agent and Pt/C as a catalyst. With the catalytic reduction of V4+ electrolyte, a high quality V3.5+ electrolyte was successfully produced and excellent cell performance was achieved. Based on the result, a prototype catalytic reactor employing Pt/C-decorated carbon felt was designed, and high-speed, continuous production of V3.5+ electrolyte in this manner was demonstrated with the reactor. This invention offers a simple but practical strategy to reduce the production cost of V3.5+ electrolyte while retaining quality that is adequate for high-performance operations.

H3PW12O40 Grafted on CeO2: A High-Performance Catalyst for the Selective Catalytic Reduction of NOx with NH3

2018 ◽  
Vol 57 (3) ◽  
pp. 856-866 ◽  
Author(s):  
Yang Geng ◽  
Shangchao Xiong ◽  
Bo Li ◽  
Yong Liao ◽  
Xin Xiao ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
High Performance ◽  
Catalytic Reduction ◽  
Reduction Of Nox

Effect of Vibration on Rapeseed Header Loss and Optimization of Header Frame

2021 ◽  
Vol 64 (4) ◽  
pp. 1247-1258
Author(s):  
Yang Li ◽  
Lizhang Xu ◽  
Zhipeng Gao ◽  
En Lu ◽  
Yaoming Li
Keyword(s):  
Modal Analysis ◽  
Engine Speed ◽  
Vibration Measurement ◽  
List Type ◽  
Positive Correlation ◽  
Combine Harvester ◽  
Analysis System ◽  
Combine Harvesters ◽  
Relationship Of ◽  
The Relationship

HighlightsThe relationship of vibration and header loss was studied by multi-point vibration measurement and loss collection test.There was an approximately linear positive correlation between total header vibration and total rapeseed header loss.The header frame was analyzed and optimized through modal simulation and testing.The total rapeseed header loss of the improved header was reduced by 33.2% to 46.9%.Abstract. In view of the current large rapeseed header losses of rape combine harvesters, the effects of the header on rapeseed header loss were studied from the perspective of vibration. First, the vibrations at various measuring points on the header during rape harvest were studied using a data acquisition and analysis system while performing collection tests of rapeseed header loss with the sample slot method. The relationships between total header vibration and total rapeseed header loss and between vertical cutter vibration and rapeseed vertical cutter loss were shown to have a positive correlation, and they all increased with the increase in engine speed. Vertical cutter loss accounted for 31.2% to 42.4% of the total rapeseed header loss. Modal analysis and optimization of the header frame were then performed by simulation and test. The natural frequencies of the first-order and second-order modes of the optimized header were increased, and the possibility of resonance with other working parts was eliminated. Finally, the improved header was tested during rape harvest. The results showed that the total vibration of the improved header was reduced by 19.9% to 43.9%, and the total rapeseed header loss was reduced by 33.2% to 46.9%. The vertical cutter vibration was reduced by 30.5% to 49.8%, and the rapeseed vertical cutter loss was reduced by 20.8% to 34.7%. In addition, the vibration and rapeseed loss of the improved header had relatively slow rates of increase with the increase in engine speed. The method of reducing rapeseed loss by reducing the header vibration achieved an obvious and positive effect. Keywords: Frame optimization, Modal analysis, Rape combine harvester, Rapeseed header loss, Vibration.

Fighting the big bad wolf of global trends: technology transfer between HPC centres and SMEs

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tamara Besednjak Valič ◽  
Janez Kolar ◽  
Urša Lamut
Keyword(s):  
High Performance ◽  
Regional Cooperation ◽  
European Countries ◽  
Automotive Sector ◽  
Regional Innovation ◽  
Content Type ◽  
Global Trends ◽  
Cognitive Frames ◽  
Dynamic Relationships ◽  
Performance Computing

Purpose This paper aims to explore the dynamic relationships between high-performance computing centres (HPC centres) and small-to-medium-sized enterprises (SMEs) working in the automotive sector. Design/methodology/approach An empirical study was conducted in 14 European countries with a total of 92 participants, representatives of HPC centres and SMEs. Data were collected through focus groups. Findings Findings show there is a distinct manner of shaping collaboration and cooperation networks between both spheres. In shaping the relationships, cognitive frames play a role through specific values involved share. Institutions also play an important role. Research limitations/implications Research into relationships between HPC centres and SMEs conducted was qualitative; therefore, limitations arise on data not being able to be generalized. The cultural aspect is to be taken into account when conducting further studies. Practical implications Findings of this study can be used by policymakers, especially those interested in regional innovation. The results can be of use when tailoring innovation policies, especially when it comes to enhancing the regional and extra-regional cooperation between HPC centres and SMEs. Originality/value To the best of authors’ knowledge, this paper is one of the first research contributions to analyse the relationships between HPC centres and SMEs from the automotive sector in selected European countries.

scholarly journals Repair and maintenance costs of 4WD tractors and self propelled combine harvesters in Italy

2013 ◽  
Vol 44 (2s) ◽  
Author(s):  
Aldo Calcante ◽  
Luca Fontanini ◽  
Fabrizio Mazzetto
Keyword(s):  
Cost Estimation ◽  
Working Hours ◽  
The United States ◽  
Operating Conditions ◽  
List Price ◽  
Optimal Time ◽  
Model Parameters ◽  
Maintenance Costs ◽  
Combine Harvesters ◽  
Engine Power

Purchasing and maintaining tractors and operating machines are two of the most considerable costs of the agricultural sector, which includes farm equipment manufacturers, farm contractors and farms. In this context, repair and maintenance costs (R&M costs) generally constitute 10-15% of the total costs related to agricultural equipment and tend to increase with the age of the equipment; hence, an important consideration in farm management is the optimal time for equipment replacement. Classical, R&M cost estimation models, calculated as a function of accumulated working hours, are usually developed by ASAE/ASABE for the United States operating conditions. However, R&M costs are strongly influenced by farming practices, operative conditions, crop and soil type, climatic conditions, etc. which can be specific for individual countries. In this study, R&M cost model parameters were recalculated for the current Italian situation. For this purpose, data related to the R&M costs of 100 4WD tractors with engine power ranging from 59 to 198 kW, and of 20 SP combine harvesters (10 straw walkers combines and 10 axial flow combines) with engine power ranging from 159 to 368 kW working in Italy were collected. According to the model, which was obtained by interpolating the data through a two-parameter power function (proposed by ASAE/ASABE), the R&M cost incidence on the list price of Italian tractors at 12,000 working hours (estimated life of the machines) was 48.6%, as compared with 43.2% calculated through the most recent U.S. model while, for self propelled combine harvesters, the R&M cost incidence at 3,000 working hours was 23.1 % as compared with 40.2% calculated through the same U.S. model.

scholarly journals Braking Efficiency and Stability of Chassis Braking System of Combine Harvester: The Theoretical Derivation and Virtual Prototype Simulation

2019 ◽  
Vol 2019 ◽  
pp. 1-18 ◽  
Author(s):  
Peilong Li ◽  
Hongmei Xu
Keyword(s):  
Virtual Prototype ◽  
Rear Wheel ◽  
Test Methods ◽  
Theoretical Derivation ◽  
The Road ◽  
Braking System ◽  
Directional Stability ◽  
Driving Speed ◽  
Combine Harvester ◽  
Combine Harvesters

With the advancement of agricultural mechanization, the safety of agricultural vehicles has aroused extensive concern. However, conventional methods evaluate the performance of the combine harvesters in a laborious and inaccurate filed-test way. It is still a challenge to evaluate their performance in a theoretical derivation-based simulation way. Here, we accurately derive the braking model of the combine harvester, which provides a guidance for further braking simulation. Firstly, a four-wheel braking system was designed and theoretically checked. Secondly, the virtual prototype of the chassis braking system was established in ADAMS, in consideration of the complicated contact characteristics between the tire and the road and between the friction pad and the brake disk. Finally, simulation experiments of braking efficiency and directional stability were carried out under different braking conditions. By this means, we find a novel effective yet simple way to optimize the braking efficiency as well as the sufficient braking stability of combine harvesters. The results show that braking efficiency would be improved with stronger braking force, lower initial braking velocity, and lighter weight of the combine harvester. Compared with straight-line braking, steering braking shows lower braking efficiency and less inclination of rear wheel bounce under the same braking conditions. As for braking directional stability, the lateral slippage would be increased with the locking of rear wheels, higher driving speed, or lower road adhesion coefficient. In addition, the simulation results are in agreement with the theoretical results, proving the validity of the virtual prototype simulation. Overall, other than traditional filed-test methods, our method provides an effective yet simple way for designing and evaluating the chassis braking system of combine harvesters.

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