Reasons why slurry pumps vibrate and solutions to handle

Reason I: Impeller unbalanced

Wear and clogging of the impeller will cause the uneven distribution of the impeller mass and then lead to vibration. Impellers should be checked and maintained at a regular time basis.

Reason II: Unreasonable assembly of bearings

Re-assemble the bearings onto the shaft, or change the bearings.

Reason III: Inadequate lubricants for the bearings

Too much or too little of the grease or oil or contaminated grease or oil will cause the short life of the bearings. Take out the bearings and use them again only after cleaned up.

Reason IV: Asymmetry or non-parallel of the motor shaft and the pump shaft

Adjust the motor shaft or the pump shaft, replace with a new shaft if the current one is deformed or bent.

Reason V: Uneven feeding of materials

Uneven feeding of materials or big solids entering will cause unstable flow inside the pump chamber, keep an even slurry feeding and protect large solids from entering into the pump.

Reason VI: Cavitation

Too low pressure inside the pump will generate bubbles and when the bubbles break, there will be vibration and noise. Raise the pump suction liquid level to increase static head.

Reason VII: Loose of the foundation or spare parts or incorrect installation

Loosened foundation or internal or external pump parts will cause vibration during pump operation. Check and maintain the slurry pump regularly.