Multi-stage magnetic-fluid seals for operating in water – life test procedure, test stand and research results

Matuszewski, Leszek

doi:10.2478/pomr-2013-0005

Cited by 16 publications

(2 citation statements)

References 4 publications

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“…According to the fitted logarithmic function image [17], a new type of magnetic fluid seal device pressure resistance value calculation formula is obtained.…”

Section: Experimental Data Analysismentioning

confidence: 99%

Design and simulation of horizontal large shaft diameter seal based on magnetic fluid

2022

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As high-end equipment requires a higher and higher sealing effect, sealing forms such as packing seals expose problems such as considerable wear and high heat generated by friction. Based on the theoretical analysis of the instability at the liquid-liquid interface and the pressure resistance of the seal structure, considering the rotating speed of the rotating shaft, this paper reconstructs the formula for calculating the pressure resistance value of the seal structure. On this basis, a magnetic fluid seal structure is designed for a large horizontal shaft diameter in liquid. Based on the magnetic field analysis software Maxwell, the magnetic field of the magnetic fluid seal is analyzed, and the mapping relationship between the different tooth widths of the pole teeth, the size of the permanent magnet, and the difference in the magnetic induction intensity of the seal gap is obtained. Built in the ring seal test system, the pressure test of the horizontal large shaft diameter seal structure under different rotating speeds was carried out to verify the effectiveness of the seal structure. The results have specific theoretical research significance and engineering application value for designing and applying magnetic fluid seal structures.

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“…According to the fitted logarithmic function image [17], a new type of magnetic fluid seal device pressure resistance value calculation formula is obtained.…”

Section: Experimental Data Analysismentioning

confidence: 99%

Design and simulation of horizontal large shaft diameter seal based on magnetic fluid

2022

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“…e nonsmooth structures and sizes considerably affect the sealing performance [20]. Machining a grooveshaped multilevel structure on the magnetic pole would intercept the magnetic fluid step-by-step and slow down the passing velocity, thus generating the sealing effect [21][22][23]. Sealed structures with two levels or above have also been confirmed to protect the sealing parts from hard damage [24].…”

Section: Introductionmentioning

confidence: 99%

Sealing Performance of Bionic Striped Mud Pump Piston

Cong

Gao

Sun³

et al. 2019

Advances in Materials Science and Engineering

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The mud pump piston is a key part for providing mud circulation, but its sealing performance often fails under complex working conditions, which shorten its service life. Inspired by the ring segment structure of earthworms, the bionic striped structure on surfaces of the mud pump piston (BW-160) was designed and machined, and the sealing performances of the bionic striped piston and the standard piston were tested on a sealing performance testing bench. It was found the bionic striped structure efficiently enhanced the sealing performance of the mud pump piston, while the stripe depth and the angle between the stripes and lateral of the piston both significantly affected the sealing performance. The structure with a stripe depth of 2 mm and angle of 90° showed the best sealing performance, which was 90.79% higher than the standard piston. The sealing mechanism showed the striped structure increased the breadth and area of contact sealing between the piston and the cylinder liner. Meanwhile, the striped structure significantly intercepted the early leaked liquid and led to the refluxing rotation of the leaked liquid at the striped structure, reducing the leakage rate.

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