On the Localization of Combine Harvester

2014 ◽  
Vol 1049-1050 ◽  
pp. 1107-1110 ◽  
Author(s):  
Hua Yang Zhao ◽  
Xiao Qiang Wu
Keyword(s):  
Agricultural Production ◽  
Development Status ◽  
Combine Harvester ◽  
Combine Harvesters

Summary of the development status of combines in domestic and abroad, combined with China's actual conditions, analysis of the problems of combine harvesters, this paper presents the type of combined harvester which suitable for agricultural production in China, put forward rationalization proposals for combine domestic.

scholarly journals Research Status of Power Allocation of Combine Harvester

2021 ◽  
pp. 113
Author(s):  
Keyword(s):  
Power Allocation ◽  
Power Distribution ◽  
Test System ◽  
Transmission System ◽  
Related Research ◽  
Power Test ◽  
Development Status ◽  
Agricultural Mechanization ◽  
Combine Harvester ◽  
Combine Harvesters

The development of combine harvester has greatly promoted the development of global agricultural mechanization, In this paper, a large number of research results related to power allocation of combine harvesters were collected, The development status of combined harvester transmission system and power test system is summarized through analysis and selection, It is found that there are few researches on the power distribution of the combine harvester, so it is necessary to further study the related research of the combine harvester.

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.

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 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.

scholarly journals Assessment of the harvesting costs of different combine harvester fleets

2019 ◽  
Vol 65 (No. 1) ◽  
pp. 25-32 ◽  
Author(s):  
Jüri Olt ◽  
Keio Küüt ◽  
Risto Ilves ◽  
Arne Küüt
Keyword(s):  
Cost Price ◽  
Combine Harvester ◽  
Practical Information ◽  
Combine Harvesters ◽  
The Cost ◽  
Harvesting Costs ◽  
Collection Methods

This study discusses practical collection methods of cereal harvesting costs in different agricultural holdings in order to effectively manage combine harvester fleets, make economically reasoned decisions on the exploitation of combine harvesters, reduce harvesting costs and consequently the cost price of cereals. For this purpose, the author used work results of combine harvesters monitored by three randomly selected agricultural holdings, collected practical information on harvesting, analysed this information and provided assessments on the effectiveness of their combine harvester fleet. Evidently, not all combine harvester fleets and combines operate with the same efficiency, as their harvesting costs are different.

A Study on Noise Test and Control of Combine Harvester

2014 ◽  
Vol 971-973 ◽  
pp. 324-328
Author(s):  
Yao Ming Li ◽  
Pan Sun
Keyword(s):  
Present Situation ◽  
National Standard ◽  
Sound Insulation ◽  
Noise Sources ◽  
Combine Harvester ◽  
Noise Test ◽  
Insulation Plate ◽  
Combine Harvesters ◽  
Standard Limit ◽  
And Control

Faced at the present situation that the noise level of most combine harvesters was generally higher than the national standard limit in our country, experiments carried out to reduce the driver's ear noise, which chosen 4LZ-5.0E type tracked combine harvester as experimental prototype. The method of noise sources separation was used to test the whole machine on different working conditions. Based on the contribution analysis to obtain the contribution of main working parts for the driver's ear noise and identify the main noise sources. Through designing the reasonable structure of sound insulation for engine and installing the sound insulation plate on the left of driver, testing results showed that the noise of the driver's ear was reduced 3.1dB (A).

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 %.

scholarly journals MULTI-SENSOR SIGNAL ACQUISITION AND DATA PROCESSING ANALYSIS OF COMBINE HARVESTER

2021 ◽  
pp. 335-344
Author(s):  
Li Wang ◽  
Shuo Li ◽  
Dianji Lv ◽  
Ghay Ekhlo
Keyword(s):  
Data Processing ◽  
Monitoring System ◽  
Intelligent Control ◽  
Large Scale ◽  
Electrical Equipment ◽  
Signal Acquisition ◽  
Test Bed ◽  
Environment Control ◽  
Combine Harvester ◽  
Combine Harvesters

In recent years, combine harvesters are increasingly developing in the direction of large-scale, technology, automation and intelligence, and more and more electrical equipment is installed on combine harvesters. The electrical system of combine harvester is prone to failure when it works in high temperature, high humidity, dusty and strong vibration environment. Parameters to be adjusted in the header system of combine harvester include header height, drum height, drum front and back position, cutting frequency and drum speed. Aiming at the inconvenience of debugging and testing the measurement and control system of combine harvester in the field operation environment, an intelligent control test bed of combine harvester was designed. The test bed can simulate various intelligent control algorithms of combine harvester in laboratory environment, control the forward speed of combine harvester according to data processing results, classify faults, and send and print stored data through serial communication. Experiments show that the system works stably and reliably, and can realize the integration of the monitoring system of combine harvester operation process. It can save costs and improve efficiency in the application of the monitoring system of combine harvester.

scholarly journals Sensitivity analysis of key operating parameters of combine harvesters

2016 ◽  
Vol 62 (No. 3) ◽  
pp. 113-121 ◽  
Author(s):  
M. Kavka ◽  
M. Mimra ◽  
F. Kumhála
Keyword(s):  
Sensitivity Analysis ◽  
Unit Cost ◽  
Mean Value ◽  
Unit Price ◽  
Operating Parameters ◽  
Purchase Price ◽  
Personnel Costs ◽  
Combine Harvester ◽  
Combine Harvesters ◽  
The Cost

The sensitivity analysis of key operating parameters on the average annual sub-profit in a group of three combine harvesters operating in companies providing agricultural services were analysed. Based on the results of the cost analysis, the following key operating parameters with the greatest influence on the costs were identified: the purchase price of the machine, the price of fuel, maintenance costs, personnel costs and annual performance. These parameters were used in the sensitivity analysis to investigate their effect on unit costs. Changing the above-mentioned parameters is calculated within ± 30% from their mean value. To perform a sensitivity analysis of the average annual sub-profit of combine harvesters, the unit price of mechanized work was additionally used. The results showed that greatest impact on both the average annual earnings of combines operation and on the changes in unit cost was those of the annual performance of the combine harvester, combine harvester purchase price and the cost of fuel. On the other hand, maintenance and personnel costs had a smaller influence concerning these changes of parameters.

scholarly journals Harvesting Lupinus albus axial rotary combine harvesters 

2018 ◽  
Vol 64 (No. 4) ◽  
pp. 209-214 ◽  
Author(s):  
Nikolay Aldoshin ◽  
Otari Didmanidze
Keyword(s):  
Lupinus Albus ◽  
Seed Mass ◽  
Axial Flow ◽  
Plant Protein ◽  
Rotor Speed ◽  
Technological Parameters ◽  
White Lupine ◽  
Combine Harvester ◽  
Leguminous Crops ◽  
Combine Harvesters

To ensure the agricultural production of the plant protein, it is advisable to cultivate leguminous crops, such as white lupine (Lupinus albus), which are rich in plant protein. White lupine is an easily threshed crop. Its seeds are large enough, so the main problem is to avoid seed damage during harvesting. To improve the harvesting technology of white lupine, the authors suggest using grain combine harvesters with axial flow threshing and separating mechanism (TSM). They consider it necessary to modify the design of such combine harvesters to eliminate repeated threshing of a grain (seed) mass and decrease threshing intensity in a threshing separating mechanism. The authors have also provided grounds for technological parameters of a combine harvester – a rotor speed and a concave clearance. The recommended rotor speed should be approximately 350–400 min<sup>–1</sup> and the concave clearance should be 40 mm.   

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