Abnormal vibration problem of stainless steel submersible pump
Abnormal vibration and instability of stainless steel submersible pumps during operation may be caused by a variety of factors. The following is a detailed analysis of this problem and the corresponding treatment methods:
1. Possible causes
Installation and fixing problems
Loose anchor bolts: The anchor bolts of the water pump base are not tightened or loose, causing the pump body to vibrate during operation.
Insufficient pipeline support: The outlet pipeline is not independently supported, and the pipeline vibration affects the water pump, increasing the vibration amplitude of the water pump.
Mechanical component problems
Bearing damage: The upper and lower bearings of the water pump are damaged or severely worn, resulting in abnormal vibration during operation.
Impeller problems: Loose, falling off or damaged impellers, as well as friction between impellers and sealing rings, can cause vibration.
Moving and static parts collision: There is friction between moving and static parts inside the water pump, such as impellers and pump casings, causing vibration.
Electrical and voltage problems
Unstable working voltage: The power supply voltage is too low or too high, resulting in unstable operation of the motor, which in turn affects the vibration of the water pump.
Water quality and flow rate problems
Water quality changes: The density of the pumped liquid is large or the viscosity is high, which exceeds the design range of the water pump, resulting in unstable operation.
Flow and head do not match: Low head and large flow cause the motor power to be inconsistent with the characteristics of the water pump, resulting in vibration.
Foundation and environmental problems
Foundation settlement: The foundation supporting the submersible pump and the motor settles unevenly, causing the pump body to tilt or deform, causing vibration.
Cavitation and pipeline pressure: The cavitation phenomenon of the submersible pump and the rapid change of pressure in the pipeline may also cause vibration and noise.
2. Treatment methods
Inspection and tightening
Tighten the anchor bolts: Check and tighten all anchor bolts evenly to ensure that the pump body is stable.
Reinforce pipeline support: Set up independent and stable support for the outlet pipe of the water pump to prevent pipeline vibration from affecting the water pump.
Replacement and repair
Replace bearings: When the bearing is found to be damaged, replace it with a new one in time.
Repair the impeller: Check the state of the impeller. If it is loose, detached or damaged, it needs to be repaired or replaced.
Eliminate friction between moving and static parts: Determine the position of friction parts, adjust or repair related parts, and eliminate friction.
Adjust electrical and voltage
Check the power supply voltage: Use a voltmeter to check the power supply voltage to ensure that it is within the normal range. If there is any abnormality, adjust the transmission voltage.
Improve water quality and flow
Check water quality: Regularly check water quality changes to ensure that the pumped liquid meets the design requirements of the water pump.
Adjust flow and head: Reduce flow by adjusting valves and other methods to match the motor power with the pump characteristics.
Strengthen foundation and improve environment
Strengthen foundation: Strengthen the foundation supporting the submersible pump and motor to prevent uneven settlement.
Improve working environment: Optimize the working environment of the submersible pump to reduce cavitation and sharp changes in pressure in the pipeline.
