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当前位置: 首页 > 文章 > 轴流泵马鞍区水力性能与压力脉动测试与分析 排灌机械工程学报 2018 (2) 118-123
Position: Home > Articles > Test and analysis on pressure pulsation and hydraulic performance of saddle zone in axial flow pump Journal of Drainage and Irrigation Machinery Engineering 2018 (2) 118-123

轴流泵马鞍区水力性能与压力脉动测试与分析

作  者：
何乃昌;谈明高;刘厚林;黄鑫;吴贤芳
单  位：
江苏大学国家水泵及系统工程技术研究中心;江苏大学能源与动力工程学院;苏尔寿污水处理设备(上海)有限公司
关键词：
轴流泵;马鞍区;水力特性;压力脉动
摘  要：
为了分析轴流泵在马鞍区工况的运行特性,对一轴流泵不同工况下的外特性和压力脉动进行了测试,重点分析了轴流泵马鞍区水力特性和压力脉动特性.试验结果表明:模型泵H-Q曲线在0.50Qd~0.60Qd内表现出明显的马鞍形,且扬程在马鞍区内0.55Qd工况时达到最小值,较0.60Qd工况扬程降低0.33 m,为设计工况下扬程的5.5%;叶轮进口和泵出口处压力脉动具有较为明显的周期性,单个周期内压力脉动表现出明显的4波峰4波谷特征;0.55Qd工况时,叶轮进口处压力脉动峰峰值为设计工况的2.3倍;各工况下导叶中间和出口处压力脉动规律较为复杂;叶轮进口压力脉动主频为叶片通过频率,0.55Qd工况叶频处的幅值最大,高于设计工况27.6%.小流量工况下,导叶中间、导叶出口处压力脉动在频域内出现较多低频信号,压力脉动频率成分较复杂.泵出口压力脉动主频在1.00Qd工况下明显表现为叶频.研究成果可为轴流泵不稳定运行特性的优化提供参考.
译  名：
Test and analysis on pressure pulsation and hydraulic performance of saddle zone in axial flow pump
作  者：
HE Naichang;TAN Minggao;LIU Houlin;HUANG Xin;WU Xianfang;National Research Center of Pumps,Jiangsu University;Sulzer Sewage Treatment Equipment(Shanghai) Co.Ltd.;School of Energy & Power Engineering,Jiangsu University;
关键词：
axial flow pump;;saddle zone;;hydraulic performance;;pressure pulsation
摘  要：
In order to analyze the running characteristics of axial flow pump in saddle zone,the pressure pulsation and hydraulic performance of saddle zone in an axial flow pump were tested under different conditions. The pressure pulsation and hydraulic performance of saddle zone in the axial flow pump were analyzed. The results show that the H-Q curve of the model pump has an obvious saddle zone under small flow rate conditions in the axial flow pump. Saddle zone is in the flow rate range of0. 50 Qd-0. 60 Qd. There is a minimum head at 0. 55 Qdwhich is lower than the head at 0. 60 Qdby0. 33 m,and the difference is 5. 5% of design head. The pressure pulsation at the impeller inlet and pump outlet has an obvious time domain periodicity which reflects the four wave crest and trough behavior in one period. The peak-to-peak value of pressure pulsation at the impeller inlet at 0. 55 Qdis2. 3 times the value under design condition. The pressure pulsation regularity of guide vane middle and outlet is complex. The main frequency at the impeller inlet is the blade passing frequency. The maximum pressure pulsation amplitude is located at the blade passing frequency of 0. 55 Qd,which is27. 6% higher than the maximum amplitude of the pressure pulsation under design condition. There appears many low-frequency signals at guide vanes middle and outlet under small flow rate conditions and the pressure pulsation is complicated. The main frequency under the pump outlet shows a blade passing frequency under design condition. The research results can provide a reference for the optimization of unstable running characteristics in the axial flow pump.

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