• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>IMAC-XXI: a conference amp; exposition on structural dynamics >DYNAMIC RESPONSE AND INSTABILITY OF PROPELLER PUMPS
【24h】

DYNAMIC RESPONSE AND INSTABILITY OF PROPELLER PUMPS

机译：螺旋桨泵的动力响应和不稳定性

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Propeller pumps are the most sensitive type ofrnpumps with respect to flow conditions at the inlet.rnThe flow at the inlet should be uniform and steady.rnAlso, it should be without swirl, vortices andrnentrained air. Flow conditions at the pump intakernare established in the approach-flow region, where,rninlet, fore bay and sump are three significant zones.rnThe design recommendations provide limits forrnoperation levels to ensure not only the operationrnrequirements but also to avoid the dynamicrninsatiability for the pumping stations. In this paper,rnthe effect of water level change in the upstream sidernon dynamic behavior of the pumping station isrnstudied. Critical water level at the pump intake isrnwell determined to avoid dynamic instability. Also,rnthe dynamic characteristics at these conditions arernassessed at one of the main pumping stations inrnEgypt. The results indicated that the minimumrnrequired submergence of the pump inlet could berndetected by measuring vibration amplitudes andrndoing frequency analysis. Decrease the water levelrnwill induce vortices swirl flow at the pump inletrnresulting to severe vibration at non-harmonic highrnfrequencies. Increase water level at the pumprnintake improves dynamic behavior, avoids anyrnsudden breakdown or failure of the pumping station,rnand decrease maintenance and replacement costs.
机译：螺旋桨泵是相对于进口处流动状况最敏感的泵。rn入口处的流量应均匀且稳定。rn此外，它应无涡流，涡流和夹带的空气。泵入口处的流动条件建立在进水区，其中进水口，前舱和集水坑是三个重要区域。设计建议为操作水平提供了限制，不仅要确保操作要求，还要避免泵站的动态不确定性。本文研究了水位变化对泵站上游铁水动力学行为的影响。确定泵入口处的临界水位，以避免动态不稳定。此外，在埃及的主要抽水站之一对这些条件下的动态特性进行了评估。结果表明，可以通过测量振动幅度和进行频率分析来检测泵入口的最小浸没深度。降低水位将在泵进口处引起涡旋涡流，从而在非谐波高频下引起剧烈振动。增加泵进水口的水位可改善动态性能，避免泵站突然发生的故障或故障，并减少维护和更换成本。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号