
Research on Vibration of Unit and Workshop of Yonghu Pump Station
Jia-qin YANG, Long CHEN, De-xiang LIU, Ying-jie PAN, Wei LU
Research on Vibration of Unit and Workshop of Yonghu Pump Station
In view of the problems such as excessive vibration of unit in the second phase of Yonghu Pumping station, strong vibration of local structure of workshop and serious wear of pump port ring, we carried out on-site inspection. Through the analysis and study of the field test results, the paper draws the conclusion that the high vibration of the unit is caused by the rapid shrinkage of the inlet taper pipe of the water pump, the strong vibration of the local structure is caused by the resonance caused by its natural vibration frequency consistent with the pump blade frequency, and the severe wear of the pump port ring is caused by the improper use of materials. According to the conclusion, the strong vibration of the pump station building disappears, the excessive vibration of the unit and the wear of the mouth ring are improved.
pump station / vibration / spectral analysis / fault diagnosis {{custom_keyword}} /
Tab.1 Equipment information list表1 仪器设备信息一览表 |
名称 | 型号 | 编号 | 灵敏度 |
---|---|---|---|
动态信号采集分析系统 | uT3408FRS-ICP | UT3408FRS201102231 | - |
压电式加速度传感器 | CA-YD-188 | 02500 | 50.48 mV/(m·s2) |
压电式加速度传感器 | CA-YD-188 | 02451 | 50.06 mV/(m·s2) |
压电式加速度传感器 | CA-YD-188 | 02458 | 51.92 mV/(m·s2) |
压电式加速度传感器 | CA-YD-188 | 02503 | 49.41 mV/(m·s2) |
压电式加速度传感器 | CA-YD-186 | 07335 | 10.27 mV/(m·s2) |
力传感器 | YDL-1 | 10897 | 4.18 pC/N;1pC=1 mV/N |
Tab.2 Detection results of natural vibration frequency of components with strong vibration sensation表2 振感强烈的构件自振频率检测结果 (Hz) |
构件 | 出水侧平台 | 泵房出水侧 | 中控室 | |||||
---|---|---|---|---|---|---|---|---|
梁 | 地面 | 墙壁 | 立柱 | 立柱 | 侧墙 | 门墙 | 地面 | |
自振频率 | 60,100,220 | 60,210,230 | 90,100,110 | 55,85,100 | 100,125,210 | 70,100,120 | 20,50,60 | 20,40,50 |
Tab.3 Detection result of natural vibration frequency of water pump inlet and outlet pipes表3 水泵进出水管自振频率检测结果 (Hz) |
构件 | 进水管 | 进水渐缩管 | 出水渐缩管 | 出水管 |
---|---|---|---|---|
自振频率 | 160,185,230 | 150,175,210 | 165,220,290 | 50,65,100 |
Fig.2 Time domain waveform of vibration of pump bearing of Unit 9图2 9号机组水泵轴承振动时域波形图 |
Tab.4 Pump bearing vibration spectrum drawing point of Unit 9表4 9号机组水泵轴承振动频谱图采点 |
序号 | 1 | 2 | 3 | 4 |
---|---|---|---|---|
频率/Hz | 60 | 180 | 220 | 1305 |
EU/(m·s-2) | 0.9675 | 0.6283 | 0.4752 | 1.5591 |
Tab.5 Vibration intensity of each measuring point of Unit 9表5 9号机组各测点的振动烈度 (mm/s) |
进水池水位 | 21.43 m | 20.64 m | |
---|---|---|---|
测点位置 | 水泵轴承径向(水平) | 3.37 | 4.07 |
水泵轴承径向(垂直) | 3.32 | 3.83 |
Tab.6 Stuffing box inlet test results表6 填料函进气试验结果 |
水位及状态 | 操作 | 60 Hz加速度幅值/(m·s-2) |
---|---|---|
20.50 m,不进气 | 无 | 1.336 |
20.00 m,不进气 | 无 | 1.477 |
19.8 m,单侧进气 | 无 | 1.179 |
19.75 m,单侧进气 | 无 | 1.588 |
19.58 m,单侧进气 | 无 | 1.949 |
19.43 m,双侧进气 | 无 | 2.008 |
19.43 m,进气减弱 | 单侧浇水 | 1.857 |
19.43 m,进气减弱 | 双侧浇水 | 1.732 |
19.43 m,进气消失 | 加大水量 | 1.489 |
19.43 m,进气消失 | 再加大水量 | 1.489 |
19.43 m,双侧进气 | 停止浇水 | 2.047 |
19.43 m,进气减弱 | 单侧浇水 | 1.710 |
19.43 m,进气恢复 | 停止浇水 | 1.821 |
19.43 m,双侧进气 | 停止浇水 | 2.026 |
Fig.8 Spectrum diagram of bearing after 1 s power failure of Unit 9图8 9号机组断电1 s后轴承频谱图 |
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