国际会议--大学英语课

国际会议--大学英语课

The seventh industry development academic conferenceThe current status and future development of cotton machinery

Organizers: United Nations Industrial Development Organization Shihezi UniversityPage 1

国际会议--大学英语课

AA Professor of Industrial Engineering The represent of China in United Nations Industrial Development Organization; The Director of the NationalInstitute

of Industrial Engineering; The chairman of Industrial Engineering Department of Tsinghua University.She specialized in the optimum performance of machinery, has been obtained the SPECIAL CONTRIBUTION AWARD FOR PROMOTING NATIONAL INDUSTRIAL DEVELOPMENT; published more than 30articles, of which more than 20 papers collected by SCI.

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国际会议--大学英语课

Simulation and experiment of influence factors on isolating effect of plastic film from mechanical plucking unginned cottonAA

国际会议--大学英语课

INTRODUCTION

On account of the special mulching film planting mode for cotton planting in Xinjiang region of China, lots of plastic film will mix in cotton in the process of mechanical harvest, which generates the content of heterologous fiber exceeding the standard severely, makes the quality grade of product decline, and is one of the main factors that make mechanical plucking unginned cotton unsalable.

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国际会议--大学英语课

Research on the international

In other countries, research on detecting and cleaning of unginned cotton is limited and a mass spectrometer is applied to detect qualitatively and quantificationally and to clean mainly in America. However, this system requires high reliability, reaction speed and great resettability. In addition, the cost of this system is pretty high. So this system is not suitable for cotton processing plant in China

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国际会议--大学英语课

Research direction

In order to improve the performance of the plastic film separator for mechanical plucking unginned cotton, and find out the optimal combination of influential factors that affect the performance of the separator, the CFD numerical simulation method was adopted. The effects of separator with different parameters were simulated and analyzed, and the working parameters of this machine were enforced optimization experimental study which used the orthogonal test method and was based on the influence factors including skew barrel’s angle, big netty roller’s rotate speed, skew barrel’s entrance air speed and netty roller axis’s horizontal included angle.To find out the best parameters.

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国际会议--大学英语课

Content and Method

Experimental materials and methods Simulation and Analysis of different parameters of plastic membrane separator on machine harvested cotton Orthogonal test research on plastic film's isolation of unginned cotton.

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国际会议--大学英语课

EXPERIMENTAL MATERIAL AND METHODExperimental material The variety of unginned cotton was Zhongmian 293, and the total mass was 103 kg. plastic film in mechanical plucking unginned cotton, Structure and principle of isolation device The main structure of plastic film s

eparator for mechanical plucking unginned cotton contains a low-pressure draught fan, unginned cotton transporting skew barrel, big netty roller, small netty roller, isolation chamber, closed-air aspirator, unginned cotton entrance, plastic film exit, etc.

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国际会议--大学英语课

Simulation

Influence of skew barrel’s angle on single unginned cotton particle’s movement status: skew barrel’s angle (a) 25°, (b) 30°, (c) 35°, (d) 40°

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国际会议--大学英语课

Simulation

Influence of big netty roller’s rotate speed on single unginned cotton particle’s movement status:big netty roller’s rotate speed (a) 60 r·min-1, (b) 80 r· min-1, (c) 100 r· min-1, (d) 120 r· min-1

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国际会议--大学英语课

Simulation

Movement status of unginned cotton particles under different skew barrel’s entrance air speed:skew barrel’s entrance air speed (a) 17 m/s, (b) 20 m/s, (c) 23 m/s, (d) 26 m/s

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国际会议--大学英语课

Verification of test results

From the analysis of experimental result data, the maximum, minimum and mean of isolation rate of plastic film were 94.73 %, 88.23 % and 90.52 %. The maximum, minimum and mean of brought-out rate of unginned cotton were 1.15, 0.7 and 0.91. According to the testification of experiment, the performance indexes got from the optimal combination of factors were approximate with the optimized results. That is, the optimal combination could meet the demand of the isolation performance of plastic film.

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国际会议--大学英语课

CONCLUSION

This article took skew barrel’s angle, big netty roller’s rotate speed, skew barrel’s entrance air speed, and netty roller axis’s horizontal included angle as influential factors, and took isolation rate of plastic film and brought-out rate of unginned cotton as the indexes of isolation performance of plastic film, and used Fluent to simulate and analyze the working parameters of plastic film separator for mechanical plucking unginned cotton. Orthogonal tests were conducted on the testbed for plastic film’s separation performance of mechanical plucking unginned cotton in order to find the optimal index combination of plastic film’s isolation of unginned cotton. The result turns out that when skew barrel’s angle was 30°, big netty roller’s rotate speed was 80 m· skew barrel’s entrance air speed wa …… 此处隐藏：3848字，全部文档内容请下载后查看。喜欢就下载吧 ……