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When the liquid delivered by the dredge pump flows in the pump, it usually produces three types of hydraulic loss, volume loss and mechanical loss.
When the liquid flows in the pump, the resistance varies depending on the smoothness of the flow path.
In addition, when the fluid enters the impeller and comes out of the impeller, it will generate collisions and vortices, which will also cause energy loss.
These two losses are collectively referred to as hydraulic losses.
Because the pump body is stationary, the gap exists due to the rotation of the impeller in the pump body.
Thus a small portion of the high pressure liquid at the impeller exit will automatically flow back to the impeller inlet.
There may also be a portion of the liquid that will flow from the balance tube back to the impeller inlet.
Or leakage from the seal, these losses are collectively referred to as volume loss.
Because the pump is in friction with the bearing, packing, etc. during operation, the impeller runs in the pump body.
Its front and rear covers also rub against the liquid
The energy loss caused by these frictions is collectively referred to as mechanical loss.
The above is the internal power loss of the dredge pump
In order to reduce the hydraulic loss, volume loss and mechanical loss of the pump
The pump should work as much as possible within the operating range
Increased clearance due to wear and tear, which increases leakage and reduces pump efficiency
Therefore, the pump should be in trouble and repaired in time to maintain a good lubrication state.
The packing gland and other fasteners should be properly tightened to reduce energy consumption and improve pump efficiency.
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