Abstract：To improve the operation stability of the multiphase pump, it is important to study the influence of gas volume fraction (GVF) change on the vibration characteristics of the pump’s key parts. Firstly, under different GVF conditions, the vibration measurements of PR pump and PH pump which are two different multi-stage multiphase pump with different types of impeller were carried out. Then, the time-frequency characteristics of the vibration signal were analyzed. Finally, a two-dimensional characteristic value (Root mean square, Kurtosis) was constructed to carry out characteristic analysis of vibration signal. The results show that when the relative GVF is increased from 0% to 100%, the vibration of the bearing housing and pump inlet of the two kinds of multiphase pump are enhanced. And the bearing housing has the greatest vibration severity. The maximum vibration severity of the bearing housing of the PH pump is higher than that of the PR pump. The vibration energy of the PR pump’s bearing housing is transferred to pump inlet more significantly with the GVF increased. On the two-dimensional Root mean square-Kurtosis diagram of bearing housing vibration signal, the PR pump and PH pump can be clearly distinguished by zero kurtosis line. In addition, the kurtosis value of vibration signal at all measuring points of PR pump is higher than that of PH pump, which indicating that the probability of PR pump failure is higher.
Key words: Multiphase pump; Vibration; Time-frequency characteristics; Root mean square; Kurtosis
朱国俊，门羿，冯建军，李康，闫思娜，李晨昊. 含气率变化对不同型式混输泵的振动特性影响研究[J]. 振动与冲击, 2022, 41(17): 185-192.
ZHU Guojun, MEN Yi, FENG Jianjun, LI Kang, YAN Sina, LI Chenhao. Effects of gas volume fraction variation on vibration characteristics of different types multiphase pumps. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(17): 185-192.
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