旋涡泵压力脉动特性的研究

发布时间：2018-09-03 21:00

【摘要】：旋涡泵作为低比转速泵越来越多地应用于船舶、航天航空和化工等领域。但是旋涡泵内部的流体压力脉动会引起泵和装置的振动噪声问题,成为高性能旋涡泵设计应用过程亟待解决的问题。本文通过数值模拟和试验分析相结合的方法分析一台旋涡泵的压力脉动特性,并探讨通过非等距叶片分布方式以降低压力脉动的方法。结果表明:叶片均布条件下,叶频是压力脉动的主要频率,且在阻隔面附近叶频的幅值最大。与均布叶片旋涡泵相比,非等距分布叶片旋涡泵在不影响其性能的同时能够显著降低在叶频处的脉动峰值,但在叶频两侧产生了附加的频率,而振动总级有明显的下降。该研究为减小旋涡泵的压力脉动和泵体振动提供了一个可行方案,对含旋涡泵系统的减振降噪具有参考意义。
[Abstract]:Vortex pump is more and more used in ship, aerospace and chemical industry as low specific speed pump. However, the pressure pulsation in the vortex pump will cause the vibration and noise of the pump and the device, which is an urgent problem to be solved in the design and application process of the high performance vortex pump. In this paper, the pressure pulsation characteristics of a vortex pump are analyzed by combining numerical simulation with experimental analysis, and the method of reducing pressure pulsation by non-equidistant blade distribution is discussed. The results show that the frequency of blade is the main frequency of pressure pulsation under the condition of uniform blade distribution, and the amplitude of leaf frequency near the barrier surface is the largest. Compared with the uniform vane vortex pump, the non-equidistant vane vortex pump can significantly reduce the pulsation peak at the frequency of the blade without affecting its performance, but the additional frequency is produced on both sides of the blade frequency, and the total vibration level is obviously decreased. This study provides a feasible scheme for reducing the pressure pulsation and the body vibration of the vortex pump, and has reference significance for the vibration reduction and noise reduction of the vortex pump system.
【作者单位】：武汉第二船舶设计研究所;浙江大学;
【分类号】：TH314

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