Depending on the force of the rotating impeller on the liquid, drive the liquid in the direction of liquid movement to transmit kinetic energy to realize the pump to transport the liquid. The image shows the working principle of the vortex pump. The impeller is a disk of uniform thickness, with many small radial blades on either side of its outer edge. There is an annular flow channel of equal cross section in the pump casing corresponding to the vane.
The entire flow channel is divided into two suction and discharge sides by a parting barb, which are respectively connected with the suction and discharge pipes of the pump. . When the liquid in the pump rotates with the impeller, it generates a certain centrifugal force, throws it out into the annular flow channel in the pump casing, and is forced to flow back under the restriction of the shape of the flow channel. flow, and then enters another leaf channel from the root of the leaf.
Therefore, the liquid path between the vanes and the annular flow channel is a kind of forward spiral for a stationary pump casing and backward spiral for a rotating impeller. The vortex pump gets its name from this vortexing motion of the liquid. The liquid can continuously enter between the blades for energy until it is finally discharged from the discharge port.
The work of the vortex pump is somewhat like a multi-stage centrifugal pump, but the vortex pump does not have an energy conversion device like the volute or guide vane of the centrifugal pump. The vortex pump mainly transfers energy to the liquid through multiple continuous works, so it can generate higher pressure. In the process of power transmission, due to the multiple impacts of the liquid, the power loss is relatively large, and the efficiency of the pump is low, generally 20-50%.
Vortex pump only for applications that require small flow (1 to 40m3/h), higher lift (up to 250 meters) of occasions, such as fire fighting pump, aircraft refueling car gasoline pump, water pump small boiler feed. The vortex pump can transport liquids with high volatility and gas, but it should not be used to transport thick liquids with a viscosity higher than 7 Pa s and dirty liquids containing solid particles.
