Impellers for centrifugal pump

The main types of pump impellers include channel type (single channel, double
channel), blade type (closed, open), spiral centrifugal, and vortex type.
The flow path impeller features a curved flow channel formed from the inlet to the
outlet within the impeller. This design makes the flow path impeller particularly
suitable for pumping liquids containing large particulate impurities or long
fibers, demonstrating excellent anti-clogging capability. However, in comparison,
its anti-cavitation performance is somewhat inferior, falling short of other types
of impellers.
Impeller with blades
The casting process for semi-open and open impellers is relatively simple, and they
are easy to maintain and clean to remove blocked impurities. However, their
drawback is that during transportation, solid particles gradually increase wear on
the inner walls of the volute chamber and the gaps between the blades, thereby
reducing the pump's operational efficiency. Additionally, this wear can disrupt the
flow stability of the liquid in the passage, causing pump vibration. Therefore,
this type of impeller is not suitable for conveying media containing large
particles or long fibers.
In comparison, closed impellers offer higher operational efficiency and can run
smoothly for extended periods, with relatively lower axial thrust. However, it
should be noted that closed impellers are prone to clogging, making them unsuitable
for pumping sewage media containing large particles or long fibers.
Helical/ spiral centrifugal impeller
The design feature lies in its twisted blades, which extend from the suction inlet
toward the axial direction along the conical hub body. This design ensures that the
transported liquid does not collide with any other components inside the pump when
flowing through the blades, thereby avoiding potential damage to the pump while
maintaining non-destructive handling of the liquid. Thanks to the helical
propulsion effect, the impeller exhibits excellent particle suspension capability,
making pumps equipped with this type of impeller particularly suitable for pumping
media containing large particles and long fibers.
Vortex impeller
The design feature of the vortex impeller is that its blades are partially or
entirely recessed from the flow passage of the volute, endowing it with excellent
anti-clogging performance. During the pump's operation, particles are driven by the
vortices generated by the impeller's rotation within the water pressure chamber.
Notably, the movement of these suspended particles does not generate energy but
instead exchanges energy with the liquid in the flow passage. This design ensures
that suspended particles or long fibers do not directly contact the blades during
flow, significantly reducing blade wear and eliminating issues of clearance
enlargement caused by abrasion. Consequently, the vortex impeller is particularly
suitable for pumping media containing large particles and long fibers.

Minimum Order: 1 sets

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