Reciprocating pump problem
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Common reciprocating pumps on site have 3 cylinder heads and 5 or 7 cylinder heads. Why not 4 or 6 cylinder heads?
In order to better balance the crankshaft force and reduce the fluctuation of outlet flow.
My personal guess is whether it is to disperse the stress on the crankshaft. If an even number of plungers are used, there must be 180-degree symmetry in the angular position of the journal when evenly distributed, which will intensify the stress on the journal. Please someone who understands mechanics please explain. This post should be posted to the machinery and equipment section.
I agree with what was said above. It is mainly to prevent resonance problems. The more plungers, the more continuous the flow, the better.