Who has a cross-section diagram of a traditional self-priming pump?
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Who has cross-sectional diagrams of strong self-priming pumps (with diaphragm pumps), self-priming pump types that function as self-priming units, large teapot-style self-priming pumps, and self-priming pumps with external and internal mixing stages?
I’m giving a PPT presentation today. You were severely criticized by your boss; tell me why other people’s self-priming pumps have low efficiency. Do you know how their structure works? So I’m asking for a cross-sectional view to get an idea! Satisfied with the flower delivery!
Internal mixing and external mixing – where’s the principle here? It’s definitely low
The last edit to this post was made by 3983596_FPPZ on 2018-12-24 at 15:40. The reasons why self-priming pumps, whether of external or internal mixing type, have lower efficiency than ordinary pumps are as follows: 1. The presence of a return hole (tube), or drainage hole, results in additional volumetric losses; if it can be closed, then there are no losses； 2. The pump’s discharge vortex chamber is larger than that of ordinary pumps, resulting in significant diffusion losses ； 3. The distance between the impeller and the baffle is smaller than that in ordinary pumps, resulting in significant shock losses ； 4. With the pump diffuser outlet located in the gas-liquid separation chamber, there is a loss due to sudden diffusion ； 5. Generally, there is no solid tube serving as a channel between the opening of the outlet diffuser and the outlet tube; instead, the liquid flows on its own, resulting in severe losses due to turbulent eddies ； 6. The suction pipe is S-shaped, resulting in additional frictional and local losses compared to ordinary pumps ； 7. To compensate for the aforementioned losses (head loss) while still meeting the performance requirements, the impeller diameter must be larger than that of ordinary pumps, which in turn results in greater disk friction losses.