water absorber
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When the pump inlet is above the water level in the tank, it is necessary to design a suction tank or install a bottom valve on the inlet pipe. May I ask what the basic structure and principle of a water absorber are? How to start the pump? An absorption tank can be made by oneself – what is its structure exactly? This post was last edited by mxqian on 2009-4-17 at 19:36.]
For centrifugal pumps, if the liquid level at the suction side is below the impeller, priming must be performed before starting. To retain water in the pump, a foot valve needs to be installed at the inlet of the suction pipe; when the pump is operating, this foot valve causes significant hydraulic losses. The water suction device mentioned by the poster probably refers to the structure of a so-called self-priming pump, right? In other words, no water filling is required before startup (water filling is still necessary for the first startup after installation); after operating for a short period of time, the pump itself can draw water up and enable normal operation. Suction pumps can be classified into the following categories based on their working principle: 1. Gas-liquid mixing type (including internal mixing and external mixing types) ； 2. Water ring type ； 3. Jet type (including liquid jets and gas jets). Working process of the gas-liquid mixed self-priming pump: Due to the special structure of the pump body, a certain amount of water remains inside the pump after it stops operating. When the pump starts again, the rotation of the impeller causes the air and water in the suction pipeline to mix thoroughly, and this mixture is sent to the gas-water separation chamber. The gas at the top of the chamber escapes, while the water at the bottom returns to the impeller, where it mixes again with any remaining air in the suction pipeline. This process continues until all the gas in the pump and suction pipeline has been removed, allowing the pump to achieve self-priming and start pumping water normally. The water ring pump is a self-priming pump that combines a water ring wheel with a pump impeller within a single casing; the water ring wheel is used to expel gas, thereby enabling self-priming. Once the pump is operating normally, the passage between the water ring wheel and the pump impeller can be blocked using a valve, and the liquid inside the water ring wheel can be drained. A jet self-priming pump is composed of a centrifugal pump and a jet pump (or ejector); it relies on a jetting mechanism to create a vacuum at the nozzle in order to achieve suction. This post was last edited by Fan Zhou Wu Hu on 2009-4-18 00:52.]
I'm referring to adding a water intake tank at the inlet of a regular centrifugal pump, built by oneself. What is its principle and structure?