Centrifugal pump principle is simple said high-speed rotating impeller, liquid between the blade rotates, due to the effect of centrifugal force, the liquid from the impeller center is flung to the impeller outer edge and the kinetic energy increases. After the fluid entering the pump shell, as the flow in the volute type pump shell gradually expand, liquid velocity decreases gradually, part of the kinetic energy into static pressure can, so the liquid with high pressure along the flow discharge. Centrifugal pumps are called centrifugal pumps because of the centrifugal pump. If mishandled, the centrifugal force generated by the impeller causes the pump to vibrate and abnormal noise. When the pump is used, the pump vibration and noise are abnormal.
1. The pump foundation is reliable.
When vibration occurs, first check whether the anchor bolts of the centrifugal pump are fastened. If not fastening can cause centrifugal pump vibration. Also consider whether the foundation strength of the ground foot is sufficient, sometimes because of the design reason, the foundation partial soft also can cause the vibration.
2. Alignment of the coupling.
Many centrifugal pumps are driven by coupling, and there are many kinds of couplings. The normal operation and service life of the coupling, shaft, bearing and machine seal are directly affected by the normal three-jaw coupling.
3. Find the central health level self-priming pump.
The center is also a common cause of vibration, and must be adjusted strictly according to the standard.
4. Bearing inspection.
Whether the bearing installation is defective or not.
5. Adjustment of rotor center position.
The rotor of the pump should be concentric with the stator. Otherwise, friction will occur during the operation of the pump, causing vibration.
6. Axial bending and rotor measurement.
If the cause of the shock is not found externally, the pump can only be disintegrated. First measure and correct the bending of the shaft. After no problem, the rotor will be installed to measure the overall wobble and ladle deviation. If excessive, it must be corrected.
7. Static and static balance detection.
In order to avoid shaking when the centrifugal pump is disassembled, the impeller should be tested for static balance.
The influence of external conditions on the pump.
When the water pump itself may have all the problems, such as still unable to solve the vibration problem, the influence of external conditions on the pump is also considered. Such as: the pump foundation resonance caused by inherent frequency and vibration frequency is similar, the prime mover fault caused by the water pump vibration, piping connection with pump USES powerful counterpart and other reasons can cause abnormal vibration of the pump. Generally, the corresponding measures can be taken to solve the problem.
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