Experiment of pressure pulsation of vertical inline centrifugal pump under different working conditions
CHEN Jinwei1, PEI Ji1*, WANG Wenjie1, DENG Qifan1, WANG Zhongsheng2
1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Shandong Changzhi Co. Ltd., Zibo, Shandong 255000, China
Abstract：In order to research the pressure pulsation characteristics of vertical inline centrifugal pump under different conditions, the test was conducted by applying a dynamic frequency pressure sensor system under 4 different operating conditions, and the monitoring points of pressure were located on the inlet pipe and the volute. Both frequency and time-frequency characteristics were investigated in the experiment. The results show that the pressure pulsation at each monitoring point has a certain periodi-city. The amplitude of pulsation is the highest near the volute tongue. As the flow rate increases, the amplitude of each monitoring point first decreases and then increases. Except under 1.4Qd condition, the dominant frequency of pressure pulsation at the inlet pipe is 2 times the shaft frequency, and the amplitude exhibits strong fluctuation characteristics. The dominant frequency of pressure pulsation at the volute tongue is of blade passing frequency, and its amplitude increases as the flow rate increases. It shows wide frequency volatility at high frequency under 0.6Qd and 1.0Qd. The dominant frequency of the pressure pulsation at the volute diffuser is of blade passing frequency under 0.6Qd and 1.0Qd, and the main frequency under overload conditions is of shaft frequency. The amplitude of shaft frequency decreases as the flow rate increases.
陈金维,裴吉*,王文杰,邓起凡,王中升. 立式管道离心泵多工况压力脉动试验[J]. 排灌机械工程学报, 2022, 40(12): 1212-1218.
CHEN Jinwei,PEI Ji*,WANG Wenjie,DENG Qifan,WANG Zhongsheng. Experiment of pressure pulsation of vertical inline centrifugal pump under different working conditions. Journal of Drainage and Irrigation Machinery Engin, 2022, 40(12): 1212-1218.
