scholarly journals Analysis of loss of grain grains by classical thrusting and separating device of grain harvester combine

2021 ◽  
Author(s):  
I. L. Rogovskii ◽  
Keyword(s):  
Dead Space ◽  
Linear Velocity ◽  
Small Component ◽  
Linear Speed ◽  
Traditional Scheme ◽  
Combine Harvester

Based on the analysis of most domestic combines, it is established that they have a traditional scheme of threshing and separating device, which includes one or two sequentially arranged threshing threshers and keyboard straw shaker. The design of drumming from rods with cross plates provides, first of all, intensification of process of threshed grain. Cereals are threshed easily, so there is no need to intensify threshing. For example, when harvesting grain harvester KZS-9M "Slavutich" with a gap at the outlet between the threshing drum and the drum 18 mm and the speed of the threshing drum 450 min-1, the loss of threshing was absent in all experiments. In this case, the transverse plates of the drum are an obstacle to the movement of the threshed mass in the threshing-separating device, forming a dead space behind each bar, where a small component of plant mass accumulates. The quality of the threshing and separating device of the combine harvester was determined by the coefficients of undersmilling, separation, crushing and clogging of the grain received for cleaning. Damage to the grain during threshing in the thresher is mainly due to the influence of the circumferential linear velocity of the threshing drum and the gap between the threshing drum and the drum. Therefore, the gap in the threshing space is variable and changes in the direction of decrease from the entrance of the plant mass into the threshing device to its exit. To summarize, we used the gap in the threshing space at the outlet of the thresher. In this regard, the beginning of the tests was at a drum speed of 450 min-1. During the tests it was found that the greatest influence on the damage to the grain has a circular linear speed of the threshing drum. Thus, when increasing the speed of the drum per 100 min-1 from 450 to 550 min-1, the damage increased from 1.5% to 5.5%, ie almost 4 times.

scholarly journals Effects of introduction of combine harvester and flatbed dryer on milling quality of three glutinous rice varieties in Lao PDR

2018 ◽  
Vol 22 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Khamtay Vongxayya ◽  
Darunee Jothityangkoon ◽  
Danuphol Ketthaisong ◽  
Jaquie Mitchell ◽  
Phetmanyseng Xangsayyasane ◽  
...  
Keyword(s):  
Lao Pdr ◽  
Rice Varieties ◽  
Milling Quality ◽  
Glutinous Rice ◽  
Combine Harvester

Study on the Relationships between Offset Ink Tack Value and its Viscosity, the Separation Velocity

2011 ◽  
Vol 332-334 ◽  
pp. 1704-1708
Author(s):  
Yong Gang Yang ◽  
Fu Ping Liu
Keyword(s):  
High Viscosity ◽  
Linear Velocity ◽  
Linear Speed ◽  
Separation Velocity ◽  
Study Results ◽  
Printing Ink

In order to find out the variation law of ink stickiness during the printing, the ink tack value under 9 different linear velocities of ink distributing roller was tested, and the relation equations between tack value and the roller linear velocity were built up. At the same time, the plastic viscosities of 8 offset inks and their tack values under 9 separation velocities were also tested. The study results showed that the higher the linear speed was, the larger the tack value was, and it would stay in a relatively high tack value (regarded as infinite tack value). Also, the printing ink having high viscosity may possess low tack value.

scholarly journals Mechanical harvesting of plums for processing with a continuously moving combine harvester

2012 ◽  
Vol 20 (1) ◽  
pp. 29-42 ◽  
Author(s):  
Augustyn Mika ◽  
Paweł Wawrzyńzak ◽  
Zbigniew Buler ◽  
Dorota Konopacka ◽  
Paweł Konopacki ◽  
...  
Keyword(s):  
Tree Growth ◽  
Training System ◽  
The Self ◽  
Prunus Domestica ◽  
Bud Formation ◽  
The Third ◽  
Combine Harvester ◽  
The Common ◽  
Training And Pruning

ABSTRACT Eleven plum cultivars (Prunus domestica L.) for processing grafted on semidwarf rootstock ‘Wangenheim Prune’ and vigorous rootstock ‘Myrobalan’ were densely planted (1000, 1250, 1666, 2500 trees ha-1) and trained to central leader spindle tree. A new training system was applied to obtain trees suitable for mechanical harvesting. The leader was not headed after planting and summer training procedures were performed in May/June. From the third year onwards, renewal pruning was carried out after fruit harvesting. The new training and pruning systems resulted in very fast tree growth, abundant branching, fruit bud formation on young wood and early bearing. The plum trees appeared to be suitable for hand and mechanical harvesting within 3 years from planting. The self propelled straddle combine harvester was able to harvest 2-3 tons of plums per hour compared to 30 kg with hand picking. Harvesting effectiveness was 90-95%. The quality of mechanically harvested plums was a little worse than of those hand picked, but fruits were suitable for processing. The ‘Common Prune’ and the prune type small plums were the most suitable fruit for mechanical harvesting.

scholarly journals DESIGN AND EXPERIMENT OF CENTRIFUGAL COLLISION TEST DEVICE FOR MILLET AND SWEET BUCKWHEAT GRAIN

2021 ◽  
pp. 193-202
Author(s):  
Jingxin Sun ◽  
Liqin Yang ◽  
Baohui Xu ◽  
Yuming Guo ◽  
Qingliang Cui ◽  
...  
Keyword(s):  
Moisture Content ◽  
Rotational Speed ◽  
Optimum Moisture Content ◽  
Linear Velocity ◽  
Rotary Table ◽  
Test Device ◽  
Linear Speed ◽  
Grain Crushing ◽  
Grain Moisture ◽  
Collision Force

This critical collision damage force of millet and sweet buckwheat grain and the shelling force of shelled granular materials are important basic data for research of threshing and shelling technology and equipment. In order to master the linear velocity and collision force of grain with different moisture content when collision damage occurs, a centrifugal collision test device is designed. Based on the dynamic and kinematic analysis of grain in the centrifugal rotary table, the collision force between grain and steel plate was measured by PVDF piezoelectric pressure sensor and data acquisition system. The results showed that: under the same moisture content, the higher the rotational speed, the higher the grain crushing rate; at the same rotational speed, with the increase of moisture content, the crushing rate first decreased and then increased. When the moisture content of Jingu-21 and Yuqiao-4 is 19.7% and 17.8%, respectively, the grain crushing rate was the lowest. In terms of the anti-collision ability of grain, the optimum moisture content of threshing is between 19.7% and 21% for millet. For sweet buckwheat, the optimum moisture content of threshing is 17.8% ~19%, while the optimum moisture content of shelling by centrifugal sheller is about 11%. The faster the rotational speed of centrifugal rotary table is, the greater the linear speed of grain is, and the greater the collision force is. When the linear velocity of grain was 8.32 m/s and 11.30 m/s respectively, the millet grain moisture content was 11.1% and 20.9% respectively, damage began to appear, and the corresponding collision force was about 5.51 N and 10.6 N, respectively. When the linear velocity of grain was 8.32 m/s and 11.30m/s respectively, and the moisture content was 11.1% and 22.8% of the sweet buckwheat grain respectively, damage began to appear, the corresponding collision force was about 8.92 N and 12.79 N, respectively. When the rotating speed of rotary table was 910 r/min, the linear speed of grain was 27.05 m/s, the crushing rate of millet and sweet buckwheat grain in harvest period were 56.30% and 63.76%, respectively, and the crushing rate of millet and buckwheat grain with 11.1% moisture content were 86.27% and 89.4%, respectively. The research results can provide theoretical basis for design and optimization of millet and sweet buckwheat combine harvester, threshing device and shelling device.

Exploitation Assessment of New Holland CX780 Combine Harvester

2016 ◽  
Vol 20 (2) ◽  
pp. 43-51
Author(s):  
Anna Dębska ◽  
Jerzy Bieniek ◽  
Emil Fabrykowski ◽  
Franciszek Molendowski ◽  
Leszek Romański
Keyword(s):  
Technological Progress ◽  
Operation Time ◽  
Wheat Grain ◽  
Combine Operation ◽  
Effective Time ◽  
Yield Value ◽  
Total Operation Time ◽  
Combine Harvester ◽  
Time Structures

AbstractThe article presents an exploitation assessment of New Holland CX780 combine operation. Significant technical and technological progress is visible in modern harvesters. Inter alia, performance increased and elements improving the quality of work of harvesters appeared. The objective of the paper was to determine efficiency of the New Holland CX780 harvester operation including factors which affect its operation. Time structures of particular activities of combine operation and ratios of these times use were determined during tests. Yield value and moisture of collected seeds was determined. Studies proved that effective time of combine operation in the process of rapeseed and wheat grain harvesting was less than 50% and was caused by long preparation of a machine for operation. Preparation for operation of a combine influences its performance in the total time. It was 22% of the total operation time in case of wheat harvesting and 20% in case of rapeseed harvesting.

Management of Student Learning

2015 ◽  
Vol 4 (3) ◽  
pp. 32-36
Author(s):  
Белый ◽  
V. Belyy
Keyword(s):  
Theory And Practice ◽  
Learning Theories ◽  
Quality Of Education ◽  
Modern Theory ◽  
Minimum Period ◽  
Industrial Enterprises ◽  
Traditional Scheme ◽  
New Learning ◽  
Temporal And Spatial

The traditional scheme of education is obsolete and needs to be replaced with new and innovative forms of learning. Also today there are particularly relevant forms, which are characterized by collaboration with industry in the learning process. There should be new learning theories such as constructivism, learning without temporal and spatial boundaries. To improve the quality of education a new educational technology and possibilities of industrial enterprises must be intensive used. This is caused by the need to revise the modern theory and practice of assessing students. After all, the student should come to the production and begin to fulfill their duties with a minimum period of adaptation. Because assessment of knowledge and skills of the graduate urgent problem of each university.

Research on the Tack Value of Offset Printing Ink

2011 ◽  
Vol 314-316 ◽  
pp. 1401-1405
Author(s):  
Yong Gang Yang
Keyword(s):  
High Viscosity ◽  
Linear Velocity ◽  
Offset Printing ◽  
Linear Speed ◽  
Study Results ◽  
Printing Ink

In order to find out the variation law of ink stickiness during the printing, the ink tack value under 9 different linear velocities of ink distributing roller was tested, and the relation equations between tack value and the roller linear velocity were built up. At the same time, the plastic viscosities of 8 offset inks and their tack values under 9 separation velocities were also tested. The study results showed that the higher the linear speed was, the larger the tack value was, and it would stay in a relatively high tack value (regarded as infinite tack value). Also, the printing ink having high viscosity may possess low tack value.

scholarly journals MODERN APPROACHES TO THE TREATMENT OF PATIENTS WITH A PRIMARY EPISODE OF BIPOLAR AFFECTIVE DISORDER

2019 ◽  
Vol 85 (4) ◽  
pp. 55-61
Author(s):  
Yu.I. Mysula
Keyword(s):  
Quality Of Life ◽  
Affective Disorder ◽  
Mental State ◽  
Bipolar Affective Disorder ◽  
Depression Scale ◽  
Biomedical Ethics ◽  
Psychosocial Therapy ◽  
Traditional Scheme ◽  
Complete Clinical Remission

A comprehensive system of treatment and rehabilitation measures for the initial episode of bipolar affective disorder is proposed, which is implemented in three interrelated stages: a psychodiagnostic stage, which provides a comprehensive clinical and psychodiagnostic analysis to determine the clinical option; the stage of complex therapy, which involves the combination of psychopharmacology with normotymics, antidepressants, atypical neuroleptics with psychoeducation, compliance therapy, family therapy, work with comorbid mental and narcological pathology; and the stage of psychosocial rehabilitation and prevention, which includes supportive psychopharmacological therapy and psychosocial therapy and rehabilitation activities. We conducted a clinical psychodiagnostic examination of 88 patients with a primary episode of Bipolar Affective Disorder (PE BAD) who were treated at the Ternopil Regional Psychoneurological Hospital during the period 2011-2016 in compliance with the principles of biomedical ethics. The following groups were formed from them: 1) 34 patients with depressed variant of PE BAD, who received treatment according to the proposed scheme; 2) 33 patients with depressive variant of PE BAD who received treatment according to the traditional scheme; 3) 11 patients with a manic variant of PE BAD who received treatment according to the proposed scheme; 4) 10 patients with a manic variant of PE BAD who received treatment according to the traditional scheme. The results were compared in pairs in each of the clinical groups according to the clinical version of PE BAD. The evaluation was performed before the start of treatment and 6 months after the start of treatment in three main areas: dynamics of mental state (complete clinical remission, significant improvement of mental state, improvement of mental state, slight improvement of mental state); dynamics of changes in psycho-emotional state based on the results of evaluation using standardized psychodiagnostic tools (M. Hamilton Depression and Anxiety Scales, The Zung self-Rating Depression Scale, Bipolar Diagnostic Scale); the dynamics of quality of life indicators according to the Scale of Quality of Life Mezzich et al. in the adaptation of N.O. Maruta. The comparative analysis showed a higher effectiveness of the proposed therapy compared to the traditional relative clinical effect, normalization of the affective sphere and improvement of the quality of life of patients.

scholarly journals Technical, Financial and Social Cultural of Feasibility Analysis of Combine Harvester in Rice Agribusiness in Tulang Bawang District, Lampung Province

2021 ◽  
Vol 1 (2) ◽  
pp. 46
Author(s):  
Hendra Saputra
Keyword(s):  
Random Sampling ◽  
Traditional Method ◽  
Technical Aspect ◽  
Feasibility Analysis ◽  
Survey Method ◽  
Cultural Aspects ◽  
Combine Harvester ◽  
Adoption Level ◽  
Farmer Income

The objectives of this research were (1) to study the technical aspect of the combined harvester, (2) to calculate the feasibility of rice agribusiness using a combined harvester, (3) to measure adoption level of farmers towards combine harvester in Tulang Bawang District, Lampung Province. The research was carried out in two subdistricts, namely Rawajitu Selatan (represented by Gedung Karya Jitu village) and Rawapitu (represented by Bumi Sari village) of Tulang Bawang district from August 2015 to December 2015, and used survey method. The studied sample of 60 farmers (or 14.90% of 972) was determined with proportional random sampling.  Two sorts of data were collected, namely interview and direct observation on-site, and feasibility analysis on a combined harvester, including technical, financial, and socio-cultural aspects. The result revealed that from technical aspects, combine harvester needed 5 to 7 hours to harvest, produced an excellent quality of unhauled rice with affordable production cost, compared with the traditional method. The use of a combined harvester was financially feasible. This was shown by farmer income and B/C ratio, from socio-cultural aspects, farmers showed high scores of adaption level towards combine harvester, namely 16.29 and 13.06 for Gedung Karya Jitu and Bumi Sari village, respectively.  

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