Is a regular grooved structure formed between the impeller and the end cover?

A regular grooved structure is formed between the impeller and the end cover, and this is commonly found in certain fluid machinery such as centrifugal pumps, axial flow pumps, fans, etc. This structure may serve several purposes: 1. Guiding the fluid: The grooved structure helps to direct the fluid along a specific path, thereby improving the efficiency of fluid flow in and out. With this design, turbulence in the flow of fluid between the impeller and the end cover can be reduced, thereby minimizing energy loss. 2. Increased stiffness: As the impeller rotates, it is subjected to forces from the fluid; a regular grooved structure can enhance the stiffness of the impeller as well as the connection areas between it and the end caps, thereby improving the torsional resistance and durability of the entire assembly. 3. Reducing leakage: In equipment such as centrifugal pumps, by creating matching groove-shaped structures, leakage of fluid from the high-pressure area to the low-pressure area can be reduced, thereby improving the pumping efficiency of the equipment. 4. Flow regulation: In some applications, grooved structures can be used to adjust the dynamic properties of fluids, such as changing flow velocity, direction, or reducing turbulence. 5. Heat dissipation: In some high-speed rotating machinery, grooved structures can provide a larger surface area, which helps to dissipate heat and maintain the equipment at its proper operating temperature. The specific reasons depend on the design and application of the device. When designing fluid machinery, engineers select and optimize these structures based on the required performance characteristics. .

Analyze whether there are hard particles in the pump’s feed. Is the inlet filter failed (corrosion and penetration, no filter screen in place, filter screen removed manually)? ； The mesh count of the inlet filter is too low, resulting in poor performance.

You write a lot, so you must be right O(∩_∩)O haha~

You may have misunderstood. Normally, there should be no such grooves. It is formed by the friction between the impeller and the end cover, but it is extremely regular! Theoretically, both sides of the impeller are convex; the convex surfaces wear out first, and no grooves are formed.

Thank you all for your answers, but the problem still hasn’t been solved