What is the Lomakin effect?
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The book states that in fluid rotary machines, when the fluid passes through the shaft seal, there are different pressure drops on the two sides of the rotating shaft, which generates a radial force that pushes the rotor back toward the center of the shaft seal. This phenomenon was later named the Lomakin effect. Why is the pressure drop different on both sides of the rotating shaft? Please explain. . .
This post was last edited by 3983596_FPPZ on 2018-11-12 at 16:34. I read the article you mentioned; it was quite difficult to read as it was written in Traditional Chinese characters :dizzy:. Lomakin is a person’s name – he proposed this theory, but his conclusions were exactly the opposite of what I had imagined. The article contained a lot of information, and I didn’t delve too deeply into it; the arguments presented were quite detailed. In the actual use of pumps, I believe that the inertial force acting to return the shaft to its proper position is much stronger than the effect described in that theory. Therefore, we should focus on the more important aspects and avoid getting too caught up in the minor details.
For example, in horizontal pumps, the shaft exhibits a certain degree of deflection when they are stopped. After it starts rotating, does the shaft change? What force causes it to change? Shouldn’t inertial force maintain the deflection?
Highly rotating objects exhibit a precession phenomenon, such as gyroscopes; you can look up information to learn more about this