Centrifugal pump water hammer
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Hello, everyone! I have a personal question: what are the main causes of water hammer in centrifugal pumps? Another theory is that variable-frequency motors do not experience water hammer effects, while only industrial-frequency motors do. Do you all think this statement is correct? What is the underlying logical framework?
Hello! The water hammer phenomenon in centrifugal pumps is mainly caused by the sudden stop or start of the pump, which leads to a sudden change in the direction or speed of the water flow in the pipes, thereby creating pressure surges. Additionally, rapidly closing valves can also cause water hammer. Regarding variable-frequency motors and fixed-frequency motors, variable-frequency motors can accelerate or decelerate smoothly by adjusting the frequency, thereby avoiding water hammer effects caused by sudden start-up or stoppage of the pump. In contrast, power-frequency motors exhibit relatively abrupt movements during startup and shutdown, making them more prone to water hammer. Therefore, this claim has a certain basis in truth. .
I really don’t know; there are also issues related to centrifugal pumps and water hammer. The diesel turns black very quickly, with a colority value greater than 3.5. What’s the reason? https://bbs.hcbbs.com/thread-5670984-1-1.html (Source: Haichuan Chemical Industry Forum)
Okay, thank you! What you say is consistent with what I know. Just to be safe, I’ll still consult the experts on the forum. Thank you so much!