Vertical multistage centrifugal pump is an important equipment widely used in industry, agriculture and urban water supply. It is composed of a pump body, a rotor component and a motor, where the rotor components include a pump shaft, impeller, bushing, impeller stop sleeve, etc. The seals of vertical multistage centrifugal pumps are mechanically sealed, cooled and lubricated by pressurized water in the balance chamber. The inlet, middle, and outlet sections of the components are tensioned by tie rods to ensure the stability and reliability of the equipment.
When the impeller on the drive shaft of the vertical multistage centrifugal pump motor rotates at high speed, the liquid filled in the impeller is subjected to centrifugal force and is pushed from the center of the impeller along the flow path between the impellers to the periphery of the impeller. Under the action of the blades, the liquid simultaneously increases the pressure and velocity and is guided by the guide shell to the next stage. This continuous flow through all impellers and guide housings further increases the pressure energy of the liquid. After each impeller is gradually superimposed, a certain lift is obtained.
The working principle of a vertical multistage centrifugal pump follows the general rules and working conditions of a centrifugal pump. The multistage centrifugal pump uses oil to seal the gap between the moving parts and reduce the harmful space, thus forming a rotary variable capacity vacuum pump. These multistage pumps are usually equipped with gas ballast to ensure the integrity of the multi-stage pumping or pressurization.
When using a vertical multistage centrifugal pump, it is necessary to pay attention to the exhaust problem. If there is air in the pump body, it cannot reach the rated pressure, and it cannot be pumped, resulting in idling phenomenon. To solve this problem, the pump itself can be started, for example by filling the pump at start-up, to ensure that the air in the pump body is exhausted.
In conclusion, the vertical multistage centrifugal pump is an efficient and reliable equipment that is widely used in various fields. During use, it is necessary to pay attention to the exhaust problem to ensure the normal operation and efficiency of the equipment. At the same time, regular maintenance and maintenance are also the key to ensure the long-term stable operation of the equipment.