Influence of liquid film thickness on bearing characteristics of magnetic‐liquid suspension guide‐way

Zhao, Jianhua; Zhang, Bin; Chen, Tao; Wang, Qiang; Gao, Dianrong

doi:10.1049/joe.2018.9010

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…The overall magnetic induction in the contact area of the bearing is stronger than that in the single‐sided permanent magnet ring bearing, whereas the length beyond 250 mT of the point contact bearing is significantly longer than that of the single‐sided permanent magnet ring bearing. In sum, the magnetic fluid film in the contact area of the inner and outer raceway of the bearing has a greater load‐carrying capacity and better lubrication effect under the joint action of bilateral magnetic rings [28, 34]. The magnetic induction intensity in the contact area of the upper and lower columns of the double‐row ball bearing follows almost the same distribution.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in this figure, the magnetic induction intensity increases along with a decreasing distance between the rolling body and the inner and outer ring raceway, and the maximum magnetic induction intensity is obtained at the minimum distance. In other words, the magnetic fluid can form a certain aggregation in the contact area and show a higher load‐carrying capacity at the minimum film thickness [28]. The magnetic induction intensity in the top contact area of the thrust ball bearing is greater than that in the bottom contact area, and a huge difference can be observed between the magnetic induction intensities in the outer and inner contact areas of the centripetal ball bearing due to the fact that some magnetic energy leaks in the air when the magnetic source passes through the magnetic circuit to generate magnetic leakage.…”

Section: Resultsmentioning

confidence: 99%

“…The top end cap and magnetic ring spacer are made of mild steel with good magnetic conductivity, whereas the bottom end cap is made of aluminium alloy, a non‐conductive material. A 0.5‐mm clearance is maintained between the permanent magnet ring and the top end cap to ensure that the system can operate properly [28]. Under the action of the permanent magnet ring, the magnetic field forms a magnetic circuit in the bearing structure, and the red dashed box and arrows in the figure indicate the magnetic circuit and the direction of the magnetic field, respectively.…”

Section: Magnetic Fluid Lubrication Bearing Analysis Modelmentioning

confidence: 99%

See 2 more Smart Citations

Structural design and magnetic field analysis on magnetic fluid lubricated bearings

Wang

Pan

et al. 2022

The Journal of Engineering

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A structural model of a bearing is proposed based on a general standard bearing structure and magneto-fluidic lubrication, and the magnetic field of the bearing lubrication gap is analyzed under the action of an applied magnetic source. Results show that the magnetic field can form a magnetic circuit in the bearing structure, and a significant magnetic flux density is formed in the contact area of the rolling element of the bearing. The magnetic induction intensity in the contact area of the rolling element of the thrust bearing can provide magnetic fluid lubrication, and the magnetic induction intensity in the contact area of the rolling element of the point contact bearing is greater than that of the linear bearing. The magnetic inductance of the rolling elements in the rolling element contact area of a double row point contact bearing is greater than that of a single ring. The double permanent magnet ring structure has a more advantageous magnetic field effect than a single ring, and the magnetic inductance in the rolling element contact area of both rows of a double row point contact bearing is relatively the same.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Magnetic Fluid Lubrication Bearing Analysis Modelmentioning

confidence: 99%

See 1 more Smart Citation

Structural design and magnetic field analysis on magnetic fluid lubricated bearings

Wang

Pan

et al. 2022

The Journal of Engineering

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“…The hydraulic resistance can form when the lubricant flows through the gap between magnetic sleeve and magnetic pole, and then the hydrostatic force will produce in the end face of magnetic pole [3][4] . The current of the electromagnetic system is in the real-time regulation state, so the great heat loss can be produced in the coils, and then the temperature rise and thermal deformation of magnetic pol will be presented.…”

Section: Fig1 Magnetic Liquid Double Suspension Bearingmentioning

confidence: 99%

“…MLDSB is mainly supported by electromagnetic suspension and assisted by hydrostatic supporting, and then its bearing capacity and stiffness can be greatly improved. It's suitable for the occasions of medium speed, heavy load [1][2] .…”

Section: Introductionmentioning

confidence: 99%

Temperature Rise and Thermal Deformation of Magnetic Pole of MLDSB under Multiple Physical Field Coupling

Zhao¹,

Zhao²,

Li³

et al. 2020

Preprint

Self Cite

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The thermal deformation of magnetic poles caused by the heat loss of the coils of Magnetic Liquid Double Suspension Bearing (MLDSB) can reduced the gap between magnetic poles and magnetic sleeve, and the probability and degree of impact-rub can be increased in the working process of MLDSB. And the coatings of magnetic poles and magnetic sleeve can be worn overly, and the operation stability and service life of MLDSB will be reduced severely. The thermal deformation of magnetic poles can be affected by the material property of magnetic pole, the electric current of the coils, and the cooling effect of the lubricants and so on, so it belongs to the multiple physical field coupling. Therefore, the flow-solid-thermal coupled mathematics model of MLDSB is established and solved with ANSYS in this paper, and the distribution law of flow field of the magnetic pole is explored. The transfer path and distribution principles of heat loss are revealed and the distribution law of temperature rise and thermal deformation of magnetic pole in different operating conditions are explored. The results indicate that the temperature rise and thermal deformation of the stator is symmetrically distributed in the center, it gradually increase from the outside to the center, and the thermal deformation near the corner of magnetic pole is largest. The most heat loss can be taken away by the lubricants under the condition of heat balance. The thermal deformation of magnetic pole can increase linearly as the current gradually increase, and the stress is concentrated in the threaded hole and magnetic pole. The thermal deformation decreases linearly as the inlet pressure of the lubricants gradually increase. The PIV results of flow trace are basically consistent with the simulation results. The research in this paper can provide the theoretical reference for the structural design and the optimization of MLDSB.

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Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

et al. 2023

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With the development of green tribology in the shipping industry, the application of water lubrication gradually replaces oil lubrication in stern bearings and thrust bearings. In terms of large-scale and high-speed ships, water-lubricated bearings with high performance are more strictly required. However, due to the lubricating medium, water-lubricated bearings have many problems such as friction, wear, vibration, noise, etc. This review focuses on the performance of marine water-lubricated bearings and their failure prevention mechanism. Furthermore, the research of marine water-lubricated bearings is reviewed by discussing its lubrication principle, test technology, friction and wear mechanism, and friction noise generation mechanism. The performance enhancement methods have been overviewed from structure optimization and material modification. Finally, the potential problems and the perspective of water-lubricated bearings are given in detail.

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Influence of liquid film thickness on bearing characteristics of magnetic‐liquid suspension guide‐way

Cited by 6 publications

References 5 publications

Structural design and magnetic field analysis on magnetic fluid lubricated bearings

Structural design and magnetic field analysis on magnetic fluid lubricated bearings

Temperature Rise and Thermal Deformation of Magnetic Pole of MLDSB under Multiple Physical Field Coupling

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

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