Energy Loss of Magnetic Coupling for Pump

Jiaqiong Wang (), Jundong Duan, Ruijie Zhang and Jingru Sun
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Jiaqiong Wang: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Jundong Duan: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Ruijie Zhang: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Jingru Sun: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China

Energies, 2025, vol. 18, issue 3, 1-14

Abstract: To investigate the energy loss characteristics of magnetic pumps, an experimental setup for magnetic transmission in pumps was constructed. Through experiments, the impact of various factors on the eddy current loss of the magnetic coupling was examined, including rotational speed, electrical conductivity of the isolation sleeve material, axial coupling length of the magnetic coupling, and the physical properties of the fluid medium. Additionally, the temperature variation at different axial positions along the isolation sleeve was measured. The results indicated that eddy current loss increases with higher rotational speeds and shows a nearly linear relationship with the axial coupling length of the magnetic coupling. Furthermore, as the conductivity of the isolation sleeve material rises, the eddy current loss also increases linearly. The conductivity and viscosity of the fluid medium were found to have negligible effects on eddy current loss. Friction losses due to the liquid medium inside the metal isolation sleeve were much smaller than the eddy current losses generated by the sleeve, and thus can be ignored. For non-metallic isolation sleeves, the energy loss is primarily attributed to fluid friction. Finally, the temperature along the axial direction of the isolation sleeve increases progressively from the flange to the bottom.

Keywords: magnetic pump; magnetic coupling; energy loss; isolation sleeve; eddy current loss; experimental research (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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