The concept and application of vortex pump

Vortex pump by rotating the impeller on the liquid force in the direction of the liquid to the liquid in the impulse to transfer kinetic energy in order to achieve the liquid pump. The impeller is a disk of the same thickness, with a large number of radial blades on either side of its outer edge. In the corresponding parts of the pump shell has a constant cross-section of the annular flow channel, the entire flow channel is divided into a suction tongue, the two rows, respectively, with the pump suction and exhaust pipe connected. The liquid in the pump rotates with the impeller to generate a certain centrifugal force, thrown out into the annular flow passage in the pump housing, and is forced to flow back under the restriction of the flow passage shape to re-enter the other back flow passage from the root of the impeller. Therefore, the movement of the liquid between the blade and the annular flow path is an advancing helix to the stationary pump casing, and a reverse helix to the rotating impeller. Vortex pump is named for this vortex movement of liquid. The liquid can enter the blades continuously for several times to obtain the energy, until finally discharged from the discharge port. A vortex pump works somewhat like a multistage centrifugal pump, but a vortex pump does not have an energy conversion device like a centrifugal pump volute or vane. Vortex pump is mainly through multiple continuous work way to transfer energy to the liquid, it can produce high pressure. In the process of energy transfer, the energy loss is larger due to the repeated impact of the liquid, and the efficiency of the pump is relatively low, generally 20 to 50%. Vortex pumps are only suitable for applications that require low flow (1 ~ 40 m 3 / h) and high lift (up to 250 m), such as fire pumps, gasoline pumps on aircraft refueling trucks and small boiler feed pumps. Vortex pumps can deliver highly volatile and gas-laden fluids but should not be used to deliver thicker liquids with viscosities greater than 7 Pa / s and unclean liquids containing solid particles. The characteristics of the vortex pump small flow, high head, with self-priming function, can be used to transport viscosity of less than 5 degrees E solid particles and their water-like liquid. Such as gasoline, kerosene, alcohol, etc., can be used as a small steam boiler water, chemicals, pharmaceuticals, high-rise water supply purposes. Over-current components as well as stainless steel and other materials can be used to transport acid, alkali corrosive liquids. Transmission medium temperature is -20 ~ +80 degrees. From the structure can be divided into; single-stage, two-stage, multi-stage; direct connection forms.

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