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《Transactions of the Chinese Society of Agricultural Engineering》 2009-08
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Noise analysis and control of pineapple leaf fiber extractor

Deng Ganran,Zhang Jin,Ou Zhongqing,Li Mingfu,Lian Wenwei (Aro-machinery Research Institute of Chinese Academic of Tropical Argicultural Sciences,State Engineering and Technology Research Center for Key Tropical Crops,Zhanjiang 524091,China)  
Measuring and analysis technology based on fast fourier transform was implemented for the problem of noise signal of pineapple leaf fiber extractor by disassembling the hood,concave board and residue discharge sheet,respectively.The main factors that increased aerodynamic noise were in sequence of concave board,the hood and residue discharge sheet.To control the noise level,the gap between the blades and the hood was increased from 20 mm to 40 mm and some holes were drilled on both sides of the hood.The extractor noise was decreased from 93.7 dB(A) to 87.8 dB(A),and the methods meet the requirements of hearing protection of operators.
【Fund】: 科技部科研院所社会公益研究专项“热带农业废弃物资源综合利用技术的研究”(2004DIB4J140)
【CateGory Index】: S226.79
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