Discussion on issues related to thin-walled impellers and permanent magnets~~
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This post was last edited by wu376849671 on 2016-9-6 23:40. 1. For all vane pumps, to what extent does the weight of the impeller affect efficiency? Why haven’t high-tech materials been used to manufacture thin-walled impellers in order to reduce their weight and improve efficiency? If feasible, it should also be possible to directly influence the axial balance design of the pump, thereby further improving its efficiency. 2. What material are the permanent magnets used in magnetic pumps and shielded pumps from the major brands available on the market? Samarium-cobalt? Neodymium iron boron? How much does a different magnetic energy product affect the efficiency of the pump? 3. Is the demagnetization effect of magnets as temperature rises a linear change (within the range from room temperature to the operating temperature of permanent magnets)? 4. The above issues mainly apply to small pumps with a power rating of 15 KW or less... Although I have been in this industry for many years, I did not graduate from a chemical engineering program; as a result, most of my work over the years has involved dealing with on-site tasks, and I have not had the opportunity to delve deeply into many theoretical concepts. I hope you will kindly share your insights.
The cost of high-tech materials is too high. Small ferrites, larger rare earths. It is guessed that demagnetization does not change linearly
As long as the desired energy-saving effects can be achieved, I think cost shouldn’t be a major issue. Based on 7,200 hours of operation per year, even for a small pump, it’s possible to save several thousand yuan. Is the difference between ferrites and rare earth permanent magnets size?
How is the savings of a few thousand yuan calculated? It’s better to just use IE3 high-efficiency motors, as they save more energy
I have extensive experience with shielded pumps; feel free to add me on QQ: 79753774 for further discussion.
There is a significant difference between neodymium-iron-boron and samarium-cobalt ferrites; in terms of both power and durability, rare-earth permanent magnets perform better；