菠萝叶刮麻机的噪声分析及其控制  

Noise analysis and control of pineapple leaf fiber extractor

作　　者：邓干然[1] 张劲[1] 欧忠庆[1] 李明福[1] 连文伟[1] 

机构地区：[1]中国热带农业科学院农业机械研究所,国家重要热带作物工程技术研究中心,湛江524091

出　　处：《农业工程学报》2009年第8期99-104,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：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)

摘　　要：针对菠萝叶刮麻机噪声过高的问题,基于噪声频谱分析技术,对分别拆除机罩、凹板、排渣板3个相关部件后的刮麻机噪声进行了测试分析。结果表明,对刮麻机空气动力性噪声影响依次为凹板、机罩、排渣板;对机罩采取了增大与刀片间隙、机罩两侧增设消声孔的措施,刮麻机噪声从93.7dB(A)下降到87.8dB(A),满足了保护操作者听力的要求。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.

关 键 词：噪声降低 频谱分析 机械设计 纤维 

分 类 号：S226.79[农业科学—农业机械化工程]