Please calculate the gap of this mouth ring
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For a cold oil pump with an inlet ring diameter of d=150mm, the replacement clearance between the shell inlet ring and the impeller inlet ring should be 1.2 MM. How is this value calculated? ? 、
First, consult standards such as API610; thereafter, based on the standard clearance, make slight adjustments according to actual conditions—including factors such as the presence of particles in the fluid, the materials of the stationary and rotating rings, the length of the pump’s cantilever, operating temperature, radial forces on the impeller, rotor runout, and the precision of machining alignment
The standards specify requirements for the minimum gap
The API specifies that the minimum diameter clearance at a rotational diameter of 125mm to 149.99mm is 0.43mm. As for when to replace the clearance, it depends on its impact on efficiency; it seems that replacement is necessary when there is 1.5 times as much wear. I don’t know where you got this 1.2mm figure from.
0.45mm, I’ve calculated it for you; how did 1.2mm come about? Is the car bigger when the hearts aren’t aligned?
Yes, there are requirements specified in API610. Depending on the specific needs of each organization, different clearance requirements apply for materials used at normal temperatures, high temperatures, in clamped conditions, and in unclamped conditions
It depends on whether the quantity you have is sufficient; if it doesn’t meet your requirements, you definitely need to replace it. Here, we use it even though a pump port ring is missing. . . It’s just a bit of a waste. . .
It’s so weird – it can still operate without a mouthpiece pump? It’s a Taiwan University-type pump with high flow rate and low head, right? The volumetric loss has little impact