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급동형태(扱胴形態)와 작물(作物)의 수분함량(水分含量)이 맥주보리의 탈곡성능(??性能)에 미치는 영향(影響)
이승규,김성태,민영봉,Lee, Seung Kyu,Kim, Sung Tae,Min, Young Bong 한국농업기계학회 1983 바이오시스템공학 Vol.7 No.2
The purpose of this experiment was to evaluate the effect of the drum structures and crop moisture contents on the performance of newly developed throw-in type axial thersher. Sachun No.2 malting barley with four different crop moisture levels was used as the testing material. Four different types of threshing drum; the cylindrical drum-equipped with teeth or rubber bars and the conical drum-equipped with teeth or rubber bars were tested. The results are summarized as follows; 1. The threshing efficiency of cylindrical drum was higher than that of the conical one, and the drum with teeth was more effective in threshing than the one with bars. However, the higher the threshing efficiency over the whole range of moisture levels and drum speeds given, the more the rapid and unexpectable variations in threshing efficiencies 2. The separation efficiency of the conical drum was decreased as drum speed was increased and was not so much influenced as crop moisture content. But in case of the cylindrical drum, the result was shown in opposite way to that of the conical one. The separation efficiency of the drum with teeth was higher than that of the drum with bars and no significant decrease in separating efficiency was found at wet crop condition. 3. Foreign matters other than grain passing through the concave sieve was decreased as crop moisture content was increased, and the purity was increased at middle range of drum speed regardless of drum types. 4. Minimum grain loss was found at 700 rpm to 800 rpm of drum speed for all types of drums. The effect of crop moisture content on total grain loss was varied with drum types. As far as the grain loss is concerned, the conical drum having teeth was not so greatly influenced by various crop moisture contents and drum speeds as compared with the other types of drum. 5. Generally, the crop moisture content has more relevant effect on the germination than the drum speed regardless of drum types. The germination percentage of grain threshed by the conical drum and the bar attached drum were higher than those of cylindrical one and teeth attached one, respectively.
이승규,김민경,이연정,정석근,오미화,김동훈,박광욱,이완규,함준상,Lee, Seung-Gyu,Kim, Min-Kyung,Lee, Yeon-Jeong,Jeong, Seok-Geun,Oh, Mi-Hwa,Kim, Dong-Hun,Park, Kwang-Wook,Lee, Wan-Kyu,Ham, Jun-Sang 한국축산식품학회 2010 한국축산식품학회지 Vol.30 No.1
산양유의 체세포수는 측정방법에 따라 많은 차이가 보고되고 있으나 국제적인 표준방법으로 pyronin Y-methyl green stain에 의한 직접현미경법이 사용되고 있다. 8개 목장 총 48개 시료를 pyronin Y-methyl green stain에 의한 직접검경법, 국립축산과학원에서 보유중인 ADAM-SCC, 충청북도 축산위생연구소에서 보유중인 Somacount 500으로 측정하여 결과를 비교하였다. Pyronin Y-methyl green stain 측정시 전체 평균은 $7.3{\times}10^5$ cells/mL인 반면 ADAMSCC와 Somacaount 500은 각각 $4.9{\times}10^5$과 $11.6{\times}10^5$ cells/mL로 나타나 과소 또는 과대평가되는 결과를 보였다. 직접현미경법과 ADAM-SCC또는 Somacaount 500과의 상관계수는 각각 0.0332 또는 0.2285로 매우 낮으며 장비간의 상관계수도 0.1552로 매우 낮게 나타났다. 산양유의 체세 포수 저감을 위해서는 측정장비의 개발이 필요하며 장비를 표준화하기 위한 표준측정법으로 pyronin Y-methyl green stain의 채택이 필요하다.
탈곡기(脫穀機)의 선별(選別) 성능(性能)을 측정(測定)하는 방법(方法)의 개발(開發)에 관(關)한 연구(硏究)
이승규 ( Sung Kyu Lee ),정창주 ( Chang Joo Chung ) 한국농공학회 1975 韓國農工學會誌 : 전원과 자원 Vol.17 No.1
This study was intended to develop a method for measuring the grain separating performance of threshers. The grain separating apparatus used for the experiment was designed and constructed, the function of which was to separate pneumatically mature and immature grain, chaff, straw, dust, and other impurities from the products of threshing. The apparatus has five material outlets where grains and impurities are fallen down by separation depending upon the specific gravity of the material white it moves above the outlets. The principle of design was to separate the mixture of mature grain, immature grain and chaff as distinct as possible, and to induce the mature grains onto the first outlet, the immature grains onto the second and the third, and the straw wastes onto the forth and the fifth outlets. The developed apparatus was tested to evaluate its separating performance with two rice varieties (Tongil and Mine-hikari) at different moisture levels and air velocities. The optimum conditions for operating the apparatus were found from experiment. The results are summarized as follows; 1. The degrees of separation, especially the amount of immature grain contained in the mature paddy, were dependent upon air speed delivered. The optimum air velocities for this apparatus for each levels of grain moisture contents were found from a series of experiments as follows; 14.7-15.3m/sec. for grain of 16 percent moisture content in wet basis, 15.3-16.0m/sec. for 20 percent, and 16.0-16.4m/sec for 24 percent. 2. Composition ratios determined based on the brine separating method was fairly well acted upon the developed apparatus, indicating its recollecting rate of the mature grains as 97.6 to 99.9 percent. The developed separatus acted similarly upon the two rice varieties which had different composition of immature paddy grain. In other words, the separating performance by the apparatus had a good correlation with the one by the brine separating method. 3. As immature grains were separated out unsatisfactory in these experiments than the brine separating method, further investigation may be needed to improve a separating performance of these materials. But the results obtained suggested a possibility of using the tester to replace the current hand separating method, ther eby enabling more consistent test results and also eliminating nearly all costly hand seperating operations.
투입식(投入式) 탈곡기(脫穀機)의 탈곡(脫穀) 및 선별(選別) 성능(性能)에 관(關)한 연구(硏究)
이승규 ( Sung Kyu Lee ),정창주 ( Chang Joo Chung ),김성래 ( Soung Rae Kim ) 한국농공학회 1975 韓國農工學會誌 : 전원과 자원 Vol.17 No.3
This study was carried out to develop the throw-in type thresher with its size as small as possible. Developing the smallest possible size of the throw-in type thresher has been very important to increase mobility and to reduce the machine price. The thresher that developed for this purpose was tested as to threshing and separation performance for the samples collected in eight catch boxes under the concave while threshing. The amount of grain collected in each compartments was measured and the threshing and separating pattern along the total span of the threshing drum was determined. The performance of separating and threshing units of the test thresher and threshing loss was evaluated by use of the developed grain separating apparatus and the method for measuring the grain separating performance of threshers. The results are summarized as follows; 1. The unthreshed grain (drum losses) and semi-threshed grain did not appeared at all throughout the treatments. 2. When threshed by making use of the developed throw-in type thresher, the threshing grain loss at about 25 per cent grain moisture was about one-half when threshed at about 18 per cent grain moisture. 3. And its grain separating loss in higher feed rate was decreased in comparison with that of lower feed rate. These results suggests that the throw-in type thresher may be suitable for wet threshing and for higher feed rate of threshing. 4. Above 60 per cent of total grain passing through concave fell through the screen within a scant 30 cm from the feeding inlet. This threshing pattern may suggest that major threshing action may be finished before about one third of cylinder length. The required separating load extended over the whole drum span is so defferent that separating elements should be redesigned so as to accomodate this variable pattern of separation load. 5. It was apparent from the experiment that the length of the threshing drum of the throw-in type thresher could be reduced from 1285mm to about 1050mm without increasing grain separation loss greatly.