What are the Hydraulic Losses of Centrifugal Slurry Pumps?

The hydraulic losses of Centrifugal Slurry Pumps are shock loss, vortex loss and friction loss along the path. Next, Dredge Pump Factory will give you a detailed explanation.

First, the impact loss

Each Centrifugal Slurry Pump has its own design flow. When operating under design flow conditions, the flow at the inlet enters the impeller along the vanes, so no impact with the vanes occurs. Similarly, the outlet flow does not impact the pump casing, which is more efficient. However, when the flow rate deviates from the design condition, the direction of the liquid flow deviates from the direction of the blade, causing an impact.

Second, the vortex loss

In the Sump Slurry Pump, the flow cross section is a very complex spatial section. When the liquid passes here, the flow rate is too small and the direction is constantly changing, so that vortex loss is inevitably generated. In addition, when the overcurrent surface has sharp corners, burrs, and dead water, the vortex loss is also increased.
 

Sump Slurry Pump

Third, the friction loss along the way

Due to the roughness of the over-flow surface of the pump and the viscosity of the liquid, the frictional resistance loss occurs when the liquid swims. The size of the loss is expressed by the following formula;

Hm=AQ2 where A is the coefficient.

Painted on the coordinates, it is a parabola with the origin as its apex.

In the hydraulic loss of each part, the hydraulic loss in the impeller is the largest, accounting for about half of the total black and white loss. Secondly, the hydraulic loss at the turn of the guide vane accounts for about 1/4 of the total hydraulic loss, while the remaining 1/4 of the hydraulic loss is lost in the impeller to the vane, the vane diffusing part, the anti-vane to the impeller inlet, etc. Parts.

In order to reduce the hydraulic loss of the Centrifugal Slurry Pumps, the cross-section of the flow should be changed gently and the speed should be reasonable. And choose the appropriate impeller, vane type and entrance and exit placement angle. In addition, the surface finish of the overcurrent components should be increased.