摘要
通过安装在不同测点位置的加速度传感器获取了离心泵的空化信号,利用时域和频域分析手段进一步探索离心泵空化的特点和规律。实验结果表明:位于泵壳上的测点B对空化更加敏感,更适宜作为空化监测点;空化前后,振动信号呈现出了先增大又逐渐减小的趋势,且在6 kHz和8 kHz出现明显的峰值;5 kHz～8 kHz和8 kHz～12 kHz频带振动加速度级以及5 kHz～12 kHz宽带振动加速度级在空化后都有10 dB左右的增大,能够明显地反映出空化的变化趋势,可以作为空化监测的特征量。
Vibration signals of cavitation in a centrifugal pump were acquired with acceleration transducers mounted on different positions in order to find the cavitation characteristics.The test results showed that the measuring point B mounted on the pump case is more sensitive to cavitation and more suitable to act as a monitoring point;the signals reveal a up-down trend,and have obvious peak values in 6kHz and 8kHz;the band vibration acceleration levels in 5 kHz^8 kHz and 8 kHz^12 kHz,and the broadband vibration acceleration levels in 5 kHz^12 kHz have about 10dB uprising after cavitation,which can clearly reflect the vibration tendency of cavitation,and can be used as indicators for cavitation monitoring.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第4期161-165,共5页
Journal of Vibration and Shock
基金
国防"十一.五"预研项目资助
关键词
离心泵
空化
空化监测
振动分析
振动加速度级
centrifugal pump
cavitation
cavitation monitoring
vibration analysis
vibration acceleration level
