Pipe pumps are relatively quiet products among water pump products. However, due to certain conditions, factors and faults, the noise of pipe pumps can increase, and sometimes the noise can even be unbearable. The loud noise of pipeline pumps is also a common situation reported to us by users during use. After studying their specific situations, we found out through investigation that it is mainly caused by the following reasons.
1. Water pump noise caused by improper installation
When installing, we pay attention to one level, two stability and three stability. Flat means horizontal. When installing the water pump, the feet must be kept level (special circumstances are a different matter) and cannot be tilted. Stable means it must be stable and cannot be loose and wobbly. Sturdy means that the installation foundation must be solid and stable, and one side cannot be grounded and the other side cannot be suspended in the air. In addition, in order to avoid resonance and noise, the pipe pump feet should be equipped with vibration isolation pads, and the inlet and outlet must be equipped with expansion joints (soft joints). Why do we do this? Since the motor of the water pump is inherently noisy and accompanied by slight vibration during operation, if no vibration isolation pad is installed, a chain reaction will occur between the water pump and the foundation, and the resonance will intensify the vibration. If expansion joints are not installed at the inlet and outlet, the vibration and noise of the motor will be transmitted to the pipeline, and the pipeline will act like a resonance chamber, which will further intensify the vibration and noise. At the same time, the pipeline will also emit sound and vibration under the action of water flow resistance and pressure in the pipeline, so expansion joints must be installed to eliminate resonance and resonance between the pipeline and the water pump.
2. Noise caused by unbalanced water pump impeller
Some water pumps have been used for a long time, and the impeller may be damaged by debris sucked into the pump cavity during operation, or other reasons may cause the impeller to lose balance, causing the impeller to lose its balance. The motor bearings have different load-bearing strengths, causing noise. At the same time, the motor shaft will also be affected by the unbalanced impeller, causing it to be out of center and causing noise.
3. Noise caused by bearing damage
Some customers install the water pump outdoors and use it without any cover. Rainwater will be sucked in by the fan blades from the motor windshield. If it invades the bearing chamber of the motor back cover, the bearing will be oxidized and rusted, and the bearing ball will no longer be smooth. , 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 damaged and is not replaced in time, it is still used and the water is not cut off. The mechanical seal loses its sealing effect and the pump chamber is damaged during operation. The internal pressure causes the water in the pump body to spray out. The water retaining ring on the motor shaft can protect the motor bearings from water intrusion for a short period of time. However, if more and more water sprays out and invades the bearing chamber, it will also damage the bearings. At this time, the sound of the working water pump may be as loud as a train running over the rails.
