Water pump vibration monitoring

Vibration monitoring is an important means of fault diagnosis of rotary equipment, vibration signal acquisition by measuring the spectrum analysis to determine the source of the accident. Vibration monitoring offline and online two ways. On-line vibration monitoring probes mounted on a pump set include accelerometers, speed sensors, and contactless eddy current displacement probes. Rolling bearing rigid, low damping, the pump shaft vibration can be completely obscured to the bearing box, so measuring the vibration of the bearing box is sufficient, the speed probe is usually used to monitor vibration; and plain bearings with lower rigidity and larger Damping, so there is a shaft vibration Magnetic pump is large and the vibration measured by the bearing box is not likely, so it is best to directly measure the shaft vibration, the installation of two different 90. Non-contact eddy current vibration probe for monitoring, a typical installation shown in Figure l-50. Pumps of different standards used in different industries have different vibration limits. For the APl pump, APl610 provides that when the pump in the workshop experimental seal. In the priority operating area, the cantilever pump and both ends of the pump support bearing box and shaft vibration can not exceed Table 1-80 and Figure l-51 of the rules, set; Vertical suspension pump bearing box and shaft vibration can not exceed Table l- 81 provisions. Item Bearing housing vibration (rolling and plain bearings) Speed ​​less than 3600r / min and single stage power less than 300kW Speed ​​greater than 3600r / min or single stage power greater than 300kW Shaft Vibration (hydrodynamic bearing) Total vibration Vibration velocity (RMS): Vu Pneumatic Diaphragm Pump, Electric Diaphragm Pump Amplitude (um, pp): Au (5.2 × 106 / n) 0.5 or 50, whichever is less Vf to f Note: Pump operation is outside of the priority operating area, The vibration limit is increased by 30%. Item Bearing housing vibration (rolling and plain bearing) Shaft vibration (hydrodynamic bearing) Total vibration Vibration velocity (RMS): Vu Amplitude (um, peak to peak): Au (6.2 × 106 / n) 0.5 or 100, whichever is less Frequency Divide Vf At Note: When the pump operation is outside the priority operating area and within the operating area, the vibration limit is increased by 30%.

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