Research on Sealing Technology of Magnetic Fluid in Medicinal High-Speed Grinder Gearbox

Huang, Jing Fei; Rui, Yan Nian; Xiao, Jianfeng

doi:10.4028/www.scientific.net/amr.433-440.600

Cited by 12 publications

(1 citation statement)

References 2 publications

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“…They are used primarily in vacuum technology. 4 However, they are also applied in valves, 5 highspeed devices, 6 a miniature seal in the water environment, 7 or in fans for cooling electric motors. 8 They also often occur in combination with other seals.…”

Section: Introductionmentioning

confidence: 99%

Magnetic fluid seal critical pressure calculation based on numerical simulations

Szczęch

2019

SIMULATION

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Magnetic fluid seals are among the most common ferrofluid applications. One interesting area is the use of numerical simulations to determine the critical pressure, which is a basic parameter determining the possible range of seal operating pressures. The purpose of this study is to present the method of critical pressure calculations in magnetic fluid seals based on magnetic field numerical simulations, which will provide better results than the methods used previously. It is a relatively simple method and can help to reduce the difference between simulations and experiments. Different seal stage shapes, such as symmetric trapezoidal, asymmetric trapezoidal, and rectangular, were taken into account. The research shows that an increase in the magnetic fluid volume applied at the seal stage and a magnetic saturation increase in the seal gap allow the manufacturing inaccuracy influence to be reduced, meaning that the difference between the simulation and experiment results is smaller. In addition, in this paper, the pressure transfer mechanism between liquid rings of the multistage seal is analyzed to show its influence on the critical pressure value calculated based on simulations.

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Section: Introductionmentioning

confidence: 99%

Magnetic fluid seal critical pressure calculation based on numerical simulations

Szczęch

2019

SIMULATION

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Advanced applications of magnet in magnetic fluid seal: A developers’ perspective

Liu

Li²,

Cai

et al. 2023

Journal of Magnetism and Magnetic Materials

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Failure mechanism and pressure resistance investigation of divergent magnetic fluid seals with staggered pole teeth

et al. 2023

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This paper investigates the failure mechanism of a divergent magnetic fluid seal (MFS) with staggered pole teeth (SPT). By pole teeth, we mean the teeth machined on the inner ring surface of the pole pieces, which have a magnetic field gathering effect. A sealing apparatus capable of directly visualizing the surface deformation of the magnetic fluid film is developed, and the sealing mechanism is studied through experiments. The magnetic field distribution of the sealing apparatus is numerically analyzed to calculate its theoretical value, and this is compared against the experimental observations. The impacts of the eccentricity distance of the axial pole teeth and the addition of magnetic insulation materials on the pressure resistance of the MFS–SPT structure are investigated. The results show that, during the pressure loading process, the magnetic fluid moves to the low-pressure side. When the seal fails, micro-leakage and complete leakage occur successively in the MFS–SPT structure. There is good agreement between the experimental and theoretical pressure resistance of a divergent MFS–SPT. As the eccentricity distance of the axial pole teeth increases, the pressure resistance of the divergent MFS–SPT is enhanced. The sealing performance of the divergent MFS–SPT structure is improved when a magnetic insulation material is added to the grooves of the axial teeth.

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Research on Sealing Technology of Magnetic Fluid in Medicinal High-Speed Grinder Gearbox

Cited by 12 publications

References 2 publications

Magnetic fluid seal critical pressure calculation based on numerical simulations

Magnetic fluid seal critical pressure calculation based on numerical simulations

Advanced applications of magnet in magnetic fluid seal: A developers’ perspective

Failure mechanism and pressure resistance investigation of divergent magnetic fluid seals with staggered pole teeth

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