About Sanitary Centrifugal Pump
Sanitary Centrifugal Pump is a vane pump. During the rotation of the impeller, due to the interaction between the blades and the liquid, the blades transfer mechanical energy to the liquid, so that the pressure of the liquid can be increased to achieve the purpose of conveying the liquid. The operation of the centrifugal pump has the following characteristics:
① The head generated by the centrifugal pump at a certain speed has a limited value. The working point flow and shaft power depend on the conditions of the device system connected to the pump (position difference, pressure difference and pipeline loss). The head changes with the flow rate.
② Stable operation, continuous delivery, no pulsation of flow and pressure.
③ Generally, there is no self-priming ability, and the pump needs to be filled with liquid or the pipeline needs to be evacuated before it can start working.
④ The centrifugal pump is started with the discharge pipeline valve closed, and the vortex pump and axial flow pump are started with the valve fully open to reduce the starting power.
Before the pump is started, the pump casing is filled with the liquid to be conveyed; after starting, the impeller is driven by the shaft to rotate at high speed, and the liquid between the blades must also rotate with it. Under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer edge and gains energy, leaving the outer edge of the impeller at high speed and entering the volute pump casing.
In the volute, the liquid slows down due to the gradual expansion of the flow channel, and part of the kinetic energy is converted into static pressure energy, and finally flows into the discharge pipe at a higher pressure and is sent to the required place. When the liquid flows from the center of the impeller to the outer edge, a certain vacuum is formed in the center of the impeller. Since the pressure above the liquid surface in the storage tank is greater than the pressure at the pump inlet, the liquid is continuously pressed into the impeller. It can be seen that as long as the impeller keeps rotating, the liquid will be continuously sucked in and discharged.
