| This paper mainly describes the vibration problem of a flash pump. The flash pump is a twin-screw pump in the chemical industry styrene-butadiene rubber device of GaoQiao petrochemical, Pump outlet pipe has the abnormal vibration, caused the pipe parts and piping accessories damaged phenomenon, it affects safety production in a certain degree and makes a potential safety hazard for the device.In order to solve the problem, we decide to find out the reason of the fault by using the technology of vibration monitoring and fault diagnosis after simple analysis of the vibration performance. After analysis the structure and running state of the twin-screw pump unit and outlet pipeline layout, eleven reasonable signal measuring points is set up for collecting the vibration data, and a reasonable evaluation criterion is chose to measure the vibration data. By analysis the working environment of pump, choose the piezoelectric acceleration sensor to collected the vibration signals, and then the vibration data of the pump and pipe is collected in real time and under different working conditions, the data is processing by using the vibration analyzer, and then the vibration frequency spectrogram is got from the result of the processing vibration data. After contrast the fault features and analysis the medium fluid physical property, the reasons for the abnormal vibration fault of the twin-screw pump discharge pipeline is found out.For the reason of the abnormal vibration, some corresponding suggestions of technical transformation is put forward, these suggestions is used for eliminating or reducing the gas content in the liquid material of entrainment in the twin-screw pump imported, and it is used for avoiding the cavitation of the twin-screw pump, and thus reducing the vibration of the flush pump unit and pipeline. These suggestions also can ensure the safetyćhigh efficient and longtime operation for twin-screw pump unit and pipeline. |
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