Abstract：In order to solve the vibration problem of circular arc gear pumps caused by cavitation, an experimental method of cavitation flow and vibration characteristics of circular arc gear pump based on ensemble empirical mode decomposition（EEMD） is proposed. Based on the cavitation test platform of circular arc gear pumps, EEMD and Hilbert marginal spectrum analysis techniques were introduced to obtain the frequency domain results of monitoring points at different speeds and different outlet pressures, and the vibration characteristics of circular arc gear pump were studied. The test results show that EEMD and Hilbert marginal spectrum analysis technology can effectively identify the outlet vibration characteristics of circular gear pump. At the rated outlet pressure, the vibration acceleration signal at the pump outlet mainly causes the increase of the energy level in the low frequency band, especially in the case of 1000Hz to 1500Hz with the increase of the working speed. At the rated speed, the marginal spectrum peak value, center frequency position and frequency variation range of vibration acceleration signal show a trend of first increasing, then decreasing and then increasing with the increase of outlet pressure. Furthermore, the peak value of marginal spectrum, center frequency and bandwidth of vibration acceleration signal of circular gear pump can be extracted as the characteristic parameters of pump cavitation.
魏小玲，冯永保，刘珂，何祯鑫. 基于EEMD的圆弧齿轮泵空化流动及振动特性试验研究[J]. 振动与冲击, 2022, 41(10): 90-98.
WEI Xiaoling，FENG Yongbao，LIU Ke，HE Zhenxin. Experimental study on the cavitation flow and vibration characteristics of circular arc gear pumps based on EEMD. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(10): 90-98.
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