When the feed water pump of one side is in normal operation, the pressure of the water side of the pump impeller is higher than that of the suction end. Therefore, the impeller acting on a pointer to the inlet of the axial force, the axial thrust is usually called the water pump, the multi-stage water pump, then the pump for the axial thrust axial thrust and its value up to several tons, such as axial thrust balance, will make the rotor axial displacement, serious the pump caused by static and dynamic friction components. Therefore, it is necessary to take corresponding measures to balance the axial thrust of the pump.
Causes of axial thrust of water pump:
1. The size of both sides of the impeller cover. The pressure distribution of the two sides of the cover plate is also different, so that an axial thrust opposite to the flow direction of the impeller inlet is generated.
2. Fluid flow from the inlet to the outlet of the impeller from the axial direction of the radial, will produce a direction of the same direction as the impeller inlet fluid flow direction.
