Why should the outlet of a centrifugal pump be provided with a variable diameter? It becomes thinner and then thicker as shown in the picture
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Is there anyone who knows enough to explain it?
What is the purpose of setting this short section?
Looking at the diameter reduction at the inlet and outlet, this pump has really gone through a lot of ups and downs.
This must have been added or changed later.
The purpose of the pup joint is to facilitate maintenance and facilitate disassembly of the pump. There is only a small gap that can be pried for such a large diameter pipe.
The purpose of diameter reduction is to convert the kinetic energy of the fluid into pressure energy for transmission, because if it is transmitted by kinetic energy, the loss will be too great and the transmission distance will not be very far.
You have to ask what the designer’s considerations were for this.
Is there no valve at the pump outlet? Can the diameter reduction prevent the pump from overflowing?
Dissent. Most of the reasons are pressure, and the ease of disassembly may be incidental.