Experimental_Study_on_Leaf-Stripping_Mechanism_of_Separating_Machinery_for_Corn_Stalk_Skin_Flesh_Lea1.pdf
玉米秸秆皮穰分离机械的叶片剥离机理的实验研究【中文3309字】
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玉米秸秆皮穰分离机械的叶片剥离机理的实验研究【中文3309字】,中文3309字,玉米,秸秆,分离,机械,叶片,剥离,机理,实验,试验,研究,钻研,中文
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Experimental Study on Leaf-Stripping Mechanism of Separating Machinery for Corn Stalk Skin Flesh Leaf YU Keqiang (Mechanical Engineering College, Hei long jiang Institute of Science and Technology, Harbin 150030) Keywords: Corn stalk; Separation machinery; Leaf-stripping mechanism Abstract. For deciding the structure and parameters of Skin flesh leaf separation machinery of Stems and leaves separation mechanism of corn stalk,the Skin flesh leaf separation machinery key mechanismleaf-stripping mechanism was experimented in the paper by Self-designed leaf-stripping equipment. For optimization parameters in structure and motion of leaf-stripping mechanism,the experimental method of the three-factor quadratics rotary orthogonal combination was adopted, and two evaluation indexes were applied in the experiment. By carrying on the experiments, the suitable parameters in structure and motion were obtained as below, rotation speed of leaf-stripping roll was 9211224rpm. leaf-stripping teeth plate clearance was 36.841.5mm. and moisture content of corn stalk was 44.965 . Corn stalks accounted for 27.39 percent of Chinas crop stalk, accounting for 46% of the resources of crop stalks can be collected, but less comprehensive utilization still in the inefficient use of stage, most of the corn stalks are just simply processing and utilization. Corn stalks is an abundant renewable resource, which is consisted by three parts of the skin, flesh, leaves. The skin is rich in cellulose and lignin, is quality cheap raw materials for paper and building materials; leaves and flesh contains rich protein, starch, fat and hemicellulose and other quality feed for herbivores, can also be used to produce xylose, cultivate edible fungus has broad application prospects1,2,3,4. Therefore, if the various components of corn stover can achieve its corresponding uses that allow parts to be able to make the best use of each, will be conducive to the effective use of resources, protect the environment and improve farmers income, thereby creating enormous social and economic value. Therefore the skin, flesh and leaves of corn talks separation is important. For our corn stalks the Skin flesh leaf separation machinery research and development status quo, studied for the development of efficient corn stalk Skin flesh leaf separation machinery, this article mainly studied leaf-stripping mechanism pilot witch is the key institutions. Test device and test preparation Test apparatus. Based on the pre-test, the design the secondary leaf-stripping process, ie two leaf-stripping device of leaf-stripping job. The study design leaf-stripping test device shown in Figure 1. 1 - console;2 - feeding mouth;3 - oriented mouth;4- leaf-stripping teeth roll; 5 - plate teeth;6 - rack;7 - motor Fig.1 Configuration of leaf-stripping equipment for corn stalk Applied Mechanics and Materials Vol. 302 (2013) pp 494-498 Online available since 2013/Feb/13 at (2013) Trans Tech Publications, Switzerland doi:10.4028/AMM.302.494 All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of TTP, . (ID: 30, University of California, San Diego, La Jolla, USA-18/01/15,00:21:35) Leaf-stripping mechanism is consisted by two rows relatively rotating leaf-stripping teeth roll (leaf-stripping teeth roll mounted plate tooth: the advantage of strength, can resist the impact, less prone to bending), the structure in Figure 1 below. leaf-stripping teeth roll is consisted by spindle, pallet, tooth, its structure diagram is shown in Figure 2. leaf-stripping teeth roll installed boards teeth, its length are 77mm thickness are 6mm ,width are 89,87,84,81,79 mm Five kinds, plate tooth designed to zigzag. plate tooth linked by a bolt with the pallet, the pallet adjacent two plates away from the center of the tooth are 120mm. 1.leaf-stripping teeth roll;2.Horizontal teeth;3.Plate tooth;4.pallets;5 corn stalk. Fig.2 Configuration of the leaf-stripping teeth roll Corn stalk go from the gap of the two adjacent plate tooth, Speed rotation of the plate, applied a striking force to the blade, so that the connecting portion between the stem and leaf breakage, to achieve the separation of the stems and leaf. leaf-stripping teeth roll is drived by speed motor through the belt , each pair leaf-stripping teeth roll rely gears to transmit power the two exclude leaf-stripping teeth roll by chain drive to transmit power. Test Materials and Methods. (1) Test material Northeast Agricultural University Xiangfang farm in 2011 l0 harvest corn stalks, stalk ,random sample diameter were more than 25 mm, as the study of the test material, the moisture content of 15% of a 65%. (2) Test method Quadratic orthogonal rotation combination design of this study using three factors of arrangements for the trial. Test factors evaluation. There are many factors that affect the stalks stems and leaves separated, stalks diameter, the position of the blade on the stalks, the moisture content of the stalks, the stalks save way will affect the leaf-stripping. The pre-test analysis, ignore the stalks itself some factors, determine to leaf-stripping teeth roll speed n (rpm), the adjacent tooth spacing s (mm), stalks stems and leaves of the moisture content w (%) for the main factors , leaf-stripping rate Y1 as index were tested. leaf-stripping rate refers to the percentage of the leaf-stripping quality through the role of the plate tooth and stalks on the total mass of the blade. Its measuring method is as follows: Each set of tests are five parallel tests, each test each processing a stalk, Each test to get rid of the leaf close up to its mass was weighed., Retained leaf of the stalk by hand-stripped weigh ed quality, calculated removing leaves accounted for the percentage of the total mass of the blade, take five times the average of the test results as to the leaf-stripping rate of each test. Calculated as follows: =%100 Q D Formulas: leaf-stripping rate； Dthe quality of removing leaves,/g； Qthe total mass of the blades of each stalk,/g。 Applied Mechanics and Materials Vol. 302495 Test arrangements. The leaf-stripping teeth roll Rotational speed n (rpm), the adjacent plate tooth spacings (mm) and stalk stem and leaf moisture content w (%) as the trial main influencing factors, leaf-stripping rate Y1 as index arrangements trial. Factor level coded as shown in Table 1 Tab. 1 Experimental variables when the moisture content increases,leaf is easyly ripped off by the plate tooth, leaf-stripping rate increase; when stems and leaves is less moisture content, stems and leaves connecting force is relatively small, easily stripped leaves, leaf-stripping rate increased. (2)The impact of two factors on the leaf-stripping rate The influence of the interaction of two factors in this test to the leaf-stripping rate, respectively is Leaf-stripping teeth roll speed and plate tooth spacing, Leaf-stripping teeth roll speed and stalk stems moisture content, plate tooth spacing and stalk stems moisture content The Leaf-stripping teeth roll speed and plate tooth spacing has a greater influence in Leaf-stripping rate, and Application Design-Expert software to map out the interaction of response surface map of leaf-stripping teeth roll speed and plate tooth spacing Interaction between the two indicators of leaf-stripping rate as shown in Figure 4. 496Advanced Engineering and Materials Be seen from Figure 4, in the condition of -1 to +1, when the plate tooth spacing is fixed at a certain value, as the speed increases, leaf-stripping rate is also increased significantly, the speed and the leaf-stripping rate index function as monotonically increasing function, and when the speed fixed at a value, with the increase of the plate tooth spacing, leaf-stripping rate instead reduced, the spacing and the leaf-stripping rate index function as monotonically decreasing function, this Consistency with single factor in the leaf-stripping rate,impact. Test analysis from a single factor and two factors that want to get a higher leaf-stripping rate, Leaf-stripping teeth roll speed value should be 921 1224rpm, adjacent plate tooth spacing values is 36.8 41.5mm, stalk stem and leaf moisture content value should be between 44.9% to 65% Fig.3 Efect of single factor on leaf-stripping Fig.4 The influence of rotation speed spacing upon leaf-stripping Test Summary. Study by the test requirements, the leaf-stripping rate should get a higher value. Considering all factors, draw various factors of the test suitable for the following values: (1) leaf-stripping teeth roll speed When the speed is the higher value, leaf-stripping is larger,when speed exceeds a certain value then leaf-stripping reduce, considering each index , the leaf-stripping teeth roll speed range 921 1224rpm. (2) plate tooth spacing Plate tooth spacing has a significant on the leaf-stripping rate. Spacing transfer small, can obtain a higher leaf-stripping rate, considering each index, the plate tooth spacing should be 36.8 41.5mm. (3) The stalk moisture content With stalk moisture content increasing leaf-stripping rate first decreases and then increases, the lowest point of the curve in the 0 level (40%) nearby. Just harvested corn stover moisture content of about 60%, considering each index, stalk moisture content should be 44.9% to 65%. The conclusion Confirmed by experiment, the experimental design of corn stalks leaf-stripping institutional structure is simple and reliable, easy to operate, can effectively separate the stalk stems and leaves, higher rates of separation and to lay the foundation for its subsequent processing. Accordance with the requirements of the the stalk stems and leaves separation processing quality, leaf-stripping rate as investigated index comprehensive Evaluation leaf-stripping institutional structure and motion parameters of corn stalk and to determine the main parameters range. In this study about leaf-stripping mechanism, tooth spacing is the most important factor to affect the processing quality, as long as select appropriate the spacing val
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