| 张俊友,温艳霞,白英.三效降膜蒸发器噪声的试验研究[J].声学技术,2009,(1):64~67 |
| 三效降膜蒸发器噪声的试验研究 |
| Experimental study of the noise of falling-film evaporator |
| 投稿时间：2008-10-20 修订日期：2009-01-08 |
| DOI： |
| 中文关键词: 噪声 气流 热压泵 |
| 英文关键词: noise jet steam fall-film evaporator |
| 基金项目:内蒙古自然科学基金项目(200408020711) |
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| 中文摘要: |
| 针对目前国内外乳粉车间的环境噪声严重超标情况,依据中华人民共和国标准(声学),在某乳粉浓缩车间对三效降膜蒸发器设备不同工况下所发射的噪声进行了全面测试,测得在不同工作压力下的噪声发射声压级最高达109dB,并运用喷射气流噪声特性公式,结合频谱分析仪数据准确获得峰值噪声频率,反算出降膜蒸发器设备喷射气流的速度大致为600m/s的超音速,证实了降膜蒸发器设备中拉伐尔喷管中的超音速宽频带噪声的理论,进一步运用现代信号分析仪器对采集的噪声信号进行系统分析,验证了气流喷射噪声是该设备的最主要噪声源,对乳粉浓缩生产车间工作环境噪声做出合理评价,为进一步改善该设备生产环境噪声污染提供数据支持. |
| 英文摘要: |
| Currently the noise in omestic milk powder factories is far beyond the standard in the world.Based on the national standard,GB/T17248.3-1999,the noise generated by the fall-film evaporator has been tested in different working conditions.The results indicate that the maximal sound pressure level is 109dB,theoretical and experimental results show that the velocity of jet steam of the falling-film evaporator is about 600m/s.And a further test proves that the jet steam is the main source of noise.Based on this study it has been expected to adopt effective measures to improve production equipment and working condition. |
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