Application of Vibration Sensor in Water Pump Detection

In the rotating equipment and flowing medium, low-intensity vibration is unavoidable. Therefore, during the manufacture and installation of the unit, interference in the design and operation of the unit should be avoided as much as possible. Reduce vibrational hazards to a minimum. When the pump room or unit vibration occurs, the vibration sensor Product_b54.html measurement should be used to analyze the possible causes of the vibration one by one to find out the crux of the problem. Take effective technical measures to eliminate them. Some of the measures are simpler. Some of the measures are more complicated. If you need a lot of money, you can take several options for a technical and economic comparison. Combined with the technological transformation of the unit, the common causes and elimination measures for the vibration of the motor, pump and pump room are given below.

First, the common causes of motor vibration and eliminate measures

1 , Partial wear of bearing: Unit's misalignment or bearing wear, elimination measures: re-align the unit concentricity, adjust or replace the bearing

2 , rotor friction: uneven air gap or bearing wear. Elimination measures: re-adjust the air gap, adjust or replace the bearing

3 , the rotor can not stop at any position or power imbalance. Elimination measures: re-calibrate rotor static balance or balance.

4 , axial pump shaft power is too large: the water level into the pool is too low, the impeller is not submerged, debris around the impeller, the pump cavitation damage is different, the impeller is missing. Elimination measures: Raise the water level of the pool, reduce the installation elevation of the pump, eliminate debris, and set up the dirt gate, repair or replace the impeller

5 , Basic vibration: The basic stiffness is poor or the bottom angle screw is loose or resonant. Elimination measures: Reinforce the foundation and tighten the anchor screws.

6 , three-phase current instability: torque decreases, the rotor floor way fault. Elimination measures: Detect and repair cage bars.

Second, the common causes of pump vibration and eliminate measures

1 Difficulties in manual cranking: The shaft of the pump is bent, the bearing is worn, the unit is not concentric, and the impeller collides with the pump casing. Elimination measures: Straighten the pump shaft, adjust or replace the bearing, re-check the unit concentricity, readjust the clearance

2 ,The shaft of the pump swings too much: Abrasion or clearance of bearings and journals is too large. Elimination measures: Repair the journal, adjust or replace the bearing

3 , hydraulic imbalance: Impeller imbalance, centrifugal pump plug or damage individual leaf. Elimination measures: Re-align the impeller static balance or balance.

The efficiency of the centrifugal pump unit drastically decreased or the efficiency of the axial flow pump unit dropped slightly accompanied by cavitation noise. Elimination measures: change the speed of the pump, avoid the resonance area, find out the cause of the mode cavitation, and take measures to eliminate cavitation.