测试科学与仪器2023，Vol.14Issue(3)：350-359,10.DOI:10.3969/j.issn.1674-8042.2023.03.012
基于相轨迹图的轴向柱塞泵振动特性研究
Vibration characteristics of axial piston pump based on phase trajectory diagram
摘要
Abstract
Considering that the vibration of the piston pump shell includes not only motion state information, but also energy state information, this study discloses the relationship between the piston pump vibration signal and the operating state by the piston pump shell vibration phase trajectory. Firstly, the high pressure fluid excitation and the vibration speed, displacement, and vibration energy of the pump shell are related. This relationship can be set forth by analysis of the piston pump fluid vibration transmission path. Secondly, according to the vibration frequency traceability, multi-synchrosqueezing transform (MSST) method is used to reconstruct signal. After the integral transformation of the reconstructed signal, the information of vibration speed and displacement can be obtained further. Finally, the trajectory diagram of the shell vibration is constructed based on the vibration speed and displacement. The experiment under different operating conditions are carried out to expound the variation rules of the kinetic energy and potential energy of the piston pump contained in the phase trajectory diagram of the shell vibration. The results show that combined with vibration frequency traceability, MSST can accurately extract the vibration frequency and phase information of shell vibration acceleration signal caused by hydraulic excitation. The operating condition of piston pump has significant influence on kinetic energy and potential energy of piston pump shell. With the increase of system pressure, the distance between the phase trajectory and the vertical zero-shift axis, and the potential energy of the shell increase significantly. With the increase of speed, the maximum vibration speed of phase trajectory diagram and the kinetic energy of shell increase significantly. The phase trajectory diagram of axial piston pump can reflect the kinetic energy and potential energy of the shell more intuitively. This study can provide a theoretical basis and method support for the fault diagnosis and health assessment of key components such as hydraulic pumps, motors.关键词
轴向柱塞泵/振动能量/多重同步压缩变换/相轨迹图Key words
axial piston pump/vibration energy/multi-synchrosqueezing transform/phase trajectory diagram引用本文复制引用
郝振甫,谷立臣,耿宝龙,刘佳敏,杨莎..基于相轨迹图的轴向柱塞泵振动特性研究[J].测试科学与仪器,2023,14(3):350-359,10.基金项目
National Natural Science Foundation of China(No.51675399) （No.51675399）
