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首页> 外文会议>First Joint Conference IAHR-IWA on Pumps, Electromechanical Devices and Systems Applied to Urban Water Management Vol.2; 2003; Polytechnic University of Valencia Spain >Pressure pulsation problems in a self-evacuating, variable speed centrifugal pump for wastewater conveyance
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Pressure pulsation problems in a self-evacuating, variable speed centrifugal pump for wastewater conveyance

机译：用于废水输送的自排空，变速离心泵中的压力脉动问题

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摘要

The Lunnarp pumping station for food industry wastewater has got two self-evacuating, variable speed centrifugal pumps. The pumps have experienced problems ever since the start-up, manifesting themselves as strong pressure fluctuations on the suction side as well as on the pressure side during normal, steady state operation. Pump operation was also accompanied by strong noise and vibrations. The pumps are located about 3 m above the pump sump water level. In order to understand and possibly counteract the problems, dynamic pressure measurements were performed on the pump for a number of operational conditions and for a number of modifications of the pumping station, especially on the suction side. Initial assumptions that the pump problems could be attributed to vapour cavitation due to the geometrical suction head and inappropriate design of the suction pipe proved to be wrong. The problem seemed, however, to be related to the presence of air/gas in the pump. A number of measures were tested but the problem could not be pin-pointed unambiguously. Significant improvement was finally obtained on the suction side by connecting the air valve in the pump with the sump water by means of a small plastic tube.
机译：食品工业废水的伦纳普泵站配备了两个自排空，变速离心泵。自启动以来，这些泵就一直遇到问题，表现为在正常的稳态运行过程中，吸入侧以及压力侧的压力波动很大。泵的运行还伴随着强烈的噪音和振动。泵位于泵池水位上方约3 m处。为了理解并可能解决这些问题，在泵上针对多种运行条件以及泵站的多种修改（尤其是在吸入侧）进行了动压力测量。最初的假设认为泵的问题可能是由于几何吸头造成的气穴现象所致，并且吸管的设计不当被证明是错误的。然而，问题似乎与泵中存在空气/气体有关。测试了许多措施，但是不能明确指出问题所在。通过使用小塑料管将泵中的空气阀与集水连接起来，最终在吸入侧获得了显着改善。

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