1. The noise caused by the imbalance of the water pump impeller. Some water pumps have been used for a long time, and the impeller is damaged by the sundries sucked into the pump cavity during operation or other reasons, resulting in the imbalance of the impeller. The left is light and the right is heavy, and the head is heavy and the feet are light. At this time, when the motor runs at high speed, the bearing strength of the motor bearing will be different, resulting in noise, At the same time, the motor shaft will also be affected by the unbalanced impeller, resulting in noise
2. For the noise caused by bearing damage, some customers install the water pump outdoors and use it without any shelter. The rainwater will be sucked by the wind blades from the motor hood. If it invades into the bearing chamber of the motor rear cover, the bearing will be oxidized and rusted, the bearing ball will no longer be smooth, and mechanical noise will be emitted. If it is installed indoors, this problem generally does not occur, but there will be another situation. If the mechanical seal is not replaced in time when it is damaged and still used without shutdown, the mechanical seal will lose its sealing function. There is pressure in the pump cavity during the operation of the water pump, causing the water in the pump to spray out. The water retaining ring on the motor shaft can protect the motor bearing from water intrusion in a short time, However, if water is sprayed more and more, it will damage the bearing after invading the bearing chamber
3. The manufacturer of multi-stage centrifugal pump said that the pump noise caused by improper installation should be flat, stable and solid during installation. Flat refers to the level. During the installation of water pump, the foot should be kept horizontal and can not be tilted. Stable refers to being stable and can not be loose and shaky. Solid refers to that the installation foundation must be solid and stable, and can not land on one side and hang in the air on the other side.
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