Abstract:In order to explore the influence of inducer on pressure fluctuation in a compact magnetic drive pump, nine different monitoring points are set up in the impeller and volute fluid domains. Through CFD transiently numerical simulations, the pressure fluctuation charts in time domain and frequency domain are obtained respectively, and the fluctuation characteristics are compared with the pump without the inducer. The results show that the amplitude of fluctuation in the first blade passing frequency in the pump with the inducer is lower than that without it. The amplitude of pressure pulsation near the blade inlet is higher than that the latter as well. In the volute, the pressure fluctuation variation rule and amplitude are changed obviously near the volute tongue after inducer is placed, and the influence of jet-wake formed by blade sweeping over the leading edge of the separator on the fluctuation is reduced. Therefore, to a certain extent, placing an inducer before the impeller is conducive to the safe operation of the pump but also reduces the vibration in the pump.
孔繁余,张坤*,童凯,钱文飞,汪家琼. 诱导轮对紧凑型磁力泵压力脉动的影响[J]. 排灌机械工程学报, 2021, 39(3): 224-230.
KONG Fanyu,ZHANG Kun*,TONG Kai,QIAN Wenfei,WANG Jiaqiong. Influence of inducer on pressure fluctuation of compact magnetic drive pump. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(3): 224-230.