The water pump may have axial force when it is running, and some axial force has little effect on the pump, but some of the axial force will have some adverse effects on the operation of the pump when the axial force is too large. Yes, today I will follow the editor of УРАП Water pump to take a look at the factors that affect the axial force produced by the pump and how to deal with it.
1. The reason for the axial force is that the pressure between the suction and discharge ports of the pump is not equal. This will make the liquid pressure on both sides of the impeller that is not symmetrical, so it will produce axial direction during operation. Forceful. And if the liquid pressure on both sides of the impeller is not included in the cross-sectional area of ​​the shaft, and the influence of the rotation of the impeller on the pressure distribution is not considered, then the force acting on the impeller is between the force on the disc and the force on the wheel cover. The difference is converted into a calculation formula that is the product of the difference between the pressure at the outlet position and the pressure at the inlet position and the area of ​​the impeller wheel cover, and because the outlet pressure is continuously greater than the inlet pressure, the pump will be There is a force acting on the rotor along the axis of the pump and directed towards the inlet.
2. When the axial force is unbalanced, it will increase the working load of the pump thrust bearing, which will also have some adverse effects on the pump bearing, and at the same time, the axial force will cause the pump rotor to move forward. The position of the suction port fluctuates, and the resulting vibration is likely to cause the position of the orifice of the impeller to rub and damage it.
3. In order to avoid the occurrence of axial force imbalance, it is generally necessary to choose a symmetrical installation method using a balance disc and impeller. For example, a single-stage pump generally has a balance hole on the impeller.
The above is the editor of УРАП Water pump: about the factors that affect the axial force produced by the pump and the processing methods.