In order to solve the problem of unbalanced force of traditional thrust bearings in the operation of well submersible pumps, a permanent magnet bearing device was designed. According to the magnetic features of two parallel rectangular section permanent magnets, a linear magnetic analysis model composed of rectangular section permanent magnet rings is proposed by using the imaginary displacement method and linear superposition principle. The influence of axial offset, axial length of a single ring and radial width of a magnetic ring on the magnetic characteristics of permanent magnet bearings was explored. The analysis results and simulation results show that the average deviation of the analytical computing value and the simulation result does not exceed 9.8%, which verifies that the analytical model is reasonable and accurate. And when the gap is fixed, the axial magnetic force first rises and then decreases with the growing of axial offset and the axial length of a single magnetic ring. It increases with the increase of the radial width of the magnetic ring. This research model provides technical support for the design computing of permanent magnet bearings and the optimization of structural parameters of submersible pumps for wells.

Xiaoguang Gao, Kaiyao Wei. Analysis of Influencing Factors of Magnetic Characteristics of Permanent Magnet Bearings of Submersible Pumps for Wells. Academic Journal of Engineering and Technology Science (2023) Vol. 6, Issue 10: 22-28. https://doi.org/10.25236/AJETS.2023.061003.

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