[Asia Pump Network News] Some vortex pump vortex pump, regenerative pump and so on. Because it is by the impeller rotation of the liquid to produce vortex motivation and inhalation and discharge of liquid, it is called the vortex pump. Vortex pump direct whirlpool pump is used to suck water and physical and chemical properties similar to the water used, the use of liquid temperature shall not exceed 60 ℃, commonly used in boiler feed water supporting, in shipbuilding, textile, chemical, metallurgy, machinery manufacturing , Aquaculture, fixed fire prevention and pressure regulator, heat exchange unit, remote irrigation and other agricultural departments have a wide range of applications. The following and we share the working principle and advantages and disadvantages of the vortex pump. The working principle of the vortex pump When the prime mover through the shaft driven impeller rotation in the pump, the liquid from the suction port into the runner, by the centrifugal force of the rotating impeller, was thrown around the annular flow channel, the liquid in the flow channel rotation. Because each of the liquid particles are subject to centrifugal force, the inner liquid in the impeller is greatly affected by the centrifugal force, while the liquid in the flow channel is little affected by the centrifugal force. Due to the different centrifugal forces, the liquid causes longitudinal vortex motion. The fluid relies on longitudinal vortices to flow through the passages between the blades multiple times within the flow path (Figure 1-35). Once the liquid passes through the leaf asking channel, the lift is increased once, and finally the liquid is pushed out to discharge El. After the liquid is discharged, a partial vacuum is formed in the passage between the blades, and the liquid continuously enters the impeller from the suction inlet and repeats the above movement. In this way, the vortex pump absorbs liquid and discharges the liquid, thus continuing to work. It can be seen from the working principle of a general vortex pump that it acts like a multistage centrifugal pump. Each vane channel is equal to one level. Once the liquid passes through the channel, the energy increases once. Therefore, the lift of the general vortex pump is higher than that of the centrifugal pump The pump is 2 to 5 times larger than the impeller diameter, so it is a high-lift, low-flow pump. Compared with a centrifugal pump of the same performance, the vortex pump is small in size and light in weight; it is much smaller in size and much simpler in construction than a positive displacement displacement pump. Therefore, the general vortex pump has the advantages of simple structure, compactness, small size, light weight and low cost. Vortex pump shortcomings 1. Lower efficiency, up to 55%, most of the efficiency of the vortex pump 20-40%, thus preventing it from the direction of high-power development. 2. Vortex pump cavitation performance is poor. 3. The vortex pump can not be used to pump more viscous media. As the viscosity of the liquid increases, the head and efficiency of the pump will decrease drastically and the viscosity of the medium will be limited to 114 centistokes. 4. Vortex pump impeller and pump between the radial clearance and axial clearance of the more stringent requirements to the processing and assembly process to bring some difficulties. 5 The medium to be pumped is limited to pure liquid. When liquids contain solid particles, they can degrade pump performance or cause the vortex pump to become inoperable due to increased axial and radial clearance due to wear. Vortex pump advantages 1. Vortex pump small size, light weight characteristics in the ship has great advantages. 2. Self-priming or self-priming with simple device. 3. With a steep drop of the lift characteristic, it is insensitive to pressure fluctuations in the system. 4. Some vortex pumps to achieve liquid-vapor mixed. This is of great importance for the pumping of volatile liquids containing gases and high temperature liquids with high vapor pressure. 5. Vortex pump structure is simple, casting and machining processes are easy to achieve, some of the vortex pump parts can also use non-metallic materials, such as plastic, nylon molded impeller. Guangzhou IFAT China Water Show article belongs to the building industry interconnect (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: gogoing (QQ / micro-channel: 181 817 456) starting: http : //beng.liuti.cn/ (Service Hotline: 400-6030-811)