The role of pipeline pump volute
The volute of the pipeline pump plays a vital role in the pipeline pump system, and its role is mainly reflected in the following aspects:
1. Collecting and conveying fluids
Collecting fluids: The primary function of the volute is to collect the fluid flowing out of the impeller outlet. During the rotation of the impeller, the energy is transferred to the fluid, which gives it kinetic energy. Subsequently, the fluid is collected in the volute.
Conveying fluids: The collected fluid is further guided in the volute and finally conveyed to the pump outlet or the next-stage impeller input port. In this process, the design of the volute ensures the smooth flow of the fluid.
2. Energy conversion
Kinetic energy to pressure energy: Another key role of the volute is to convert the kinetic energy of the fluid into pressure energy. Through its specific spiral design, the volute can control the flow trajectory and angle of the fluid, so that the fluid reaches a certain pressure while rotating. This conversion is crucial to the performance of the pipeline pump because it is directly related to the output pressure and efficiency of the pump.
3. Reducing hydraulic losses
Reducing flow rate: The design of the volute also takes into account the need to reduce the flow rate of the fluid. By gradually increasing the cross-sectional area, the volute gradually reduces the flow rate of the fluid, thereby reducing the hydraulic loss caused by excessive flow rate. This design principle conforms to the Bernoulli continuity equation, that is, the flow rate decreases and the pressure increases.
Eliminate rotational motion: The volute can also effectively eliminate the rotational motion of the fluid flowing out of the impeller. If this rotational motion is not eliminated, it may cause additional hydraulic losses and vibration. The volute, through its specific shape and flow channel design, makes the fluid present a uniform, non-rotating flow state when it flows out of the volute.
4. Improve the efficiency of the pump
Optimize the flow trajectory: A reasonable volute design can optimize the flow trajectory and angle of the fluid, thereby reducing eddy current loss and load loss. These losses are common forms of energy loss during the operation of the pump. By optimizing the volute design, these losses can be significantly reduced and the efficiency of the pump can be improved.
Control the output pressure: The volute can also control the output pressure of the pump by adjusting the gap between the impeller and the volute. This adjustment mechanism enables the pipeline pump to be flexibly adjusted according to different working requirements, thereby ensuring the stable operation of the system.
