| 高吸程射流泵装置的气蚀临界沉没度研究 |
| |
| 引用本文： | 邹晨海,李,红,向清江,等.高吸程射流泵装置的气蚀临界沉没度研究[J].中国农村水利水电,2014,0(2):122-124. |
| |
| 作者姓名： | 邹晨海 李 红 向清江 等 |
| |
| 作者单位： | 江苏大学流体机械工程技术研究中心 |
| |
| 基金项目： | 国家高科技研究发展计划(“863”计划);国家农业科技成果转化资金 |
| |
| 摘 要： | 随着河水等水位的不断下降，高吸程喷射泵得到越来越多的应用。当射流泵内压力低于流体的汽化压力时，就会发生气蚀，不仅对进入喉管的流体有节流的作用，减小流量，还会剥蚀射流泵部件壁面，产生噪声，降低泵效。为了避免气蚀的发生，就要控制高吸程喷射泵的气蚀临界沉没度。本文推导出了气蚀临界沉没度的计算公式，通过已知的高吸程喷射泵产品性能参数及下泵深度求得气蚀临界沉没度。通过试验，间接测量了两组扬程分别为44m及34m的高吸程喷射泵正常工作时的最大吸程，验证了理论计算结果。通过对计算所得气蚀临界沉没度和试验测得的最大吸程比较分析，发现高吸程喷射泵射流泵无法正常工作的原因是发生了气蚀或工作压力太小，可以采取调节下泵深度或增加工作泵扬程等措施以满足使用需要。
|
| 收稿时间： | 2013-07-18 |
| 修稿时间： | 2013-08-15 |
STUDY ON CRITICAL CAVITATION DEPTH OF SUPER SUCTION LIFT JET PUMP |
| |
| Abstract: | With the river level declining, Super suction lift jet pump is applied in more and more situation. Cavitation happens When jet pump internal pressure below the fluid evaporation which will not only to lead throttle effect, but also lead denudation on the wall of jet pump, produce noise and reduce the pump efficiency. In order to avoid cavitation, critical cavitation depth should be controled. Through this paper, the formulas of critical cavitation depth are simplified and deduced. Through the test, the maximum depth of two Super suction lift jet pumps including 25m and 34m head centrifugal pumps are measured indirectly. The data which revised after experiment and the results of calculation are nearly consistent. Through comparison and analysis, the reason why the Super suction lift jet pump can''t work normally is happening cavitation or working pressure is too small. Controlling depth of jet pump or increase working pump head can be taken to satisfy the user requirements. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国农村水利水电》浏览原始摘要信息 |
| 点击此处可从《中国农村水利水电》下载免费的PDF全文 |
|
