摘要
为研究叶轮出口宽度对离心泵流动诱导振动噪声的影响,以一台单级单吸离心泵为研究对象,保持泵体和叶轮其他几何参数不变,将叶轮出口宽度b2从10mm分别改为6,8和12mm.在离心泵闭式实验台上测量了不同出口宽度模型泵在全流量范围内的振动和噪声信号,并对信号进行处理和分析.实验结果表明:模型泵流动诱导的振动对泵体的影响最大,随着叶轮出口宽度的增加,模型泵4个测点的振动强度大致呈先增加后降低的趋势,当b2=8mm时,模型泵的振动强度最大;在不同流量工况下,模型泵噪声信号随叶轮出口宽度的增加其轴频峰值变化规律复杂,b2=10mm的模型泵各工况下噪声信号的轴频峰值相对较小,且在设计工况下达到最小值.
In order to research the effects of impeller outlet width on flow induced the vibration and noise of centrifugal pumps induced by the flow, a single grade single suction centrifugal pump was selected as research object. The outlet width was varied from 10 mm to 6, 8, 12 mm, while the volute and other geometric parameters kept constant. Based on the centrifugal pump closed experimental rig, the flow induced vibration and noise signals of model pump with different outlet width in the full flow range were measured and analyzed. Experimental results show that the influence of flow induced vibration on volute is the largest. With the increase of impeller outlet width, the variation tendency of vibration intensity for 4 measure points augments at first and then decreases. When the outlet width is 8 ram, the vibration intensity of model pump gets the maximum value. Under different conditions, the shaft frequency peak of noise signal varied intricately with the increase of impeller outlet width. When the outlet width is 10 ram, the shaft frequency peak of the model pump is low under every con- dition, and gets the minimum value at designed condition.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第1期123-127,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家杰出青年基金资助项目(50825902)
国家自然科学基金资助项目(51079102)
江苏省自然科学基金创新学者攀登项目(BK2009006)
江苏省'333高层次人才培养工程'科研基金资助项目
江苏省'六大人才高峰'基金资助项目
江苏高校优势学科建设工程资助项目
关键词
离心泵
叶轮
振动
噪声
出口宽度
centrifugal pumps
impeller
vibration
noise
outlet width
