Influence of Operating Temperature on the Static Characteristics of an Externally Pressurized Thrust Bearing Lubricated with Refrigerant Gas

Lian, Huaqi; Rong, Chengjun; Li, Yulong

doi:10.1007/s11249-021-01501-2

Cited by 3 publications

(3 citation statements)

References 26 publications

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“…If the operating temperature of the lubrication point exceeds the upper limit of the grease use temperature, it can accelerate the evaporation of the grease base oil, cause oxidative deterioration, and lead to colloidal shrinkage and oil splitting phenomenon [100]. Meanwhile, the operating temperature of the bearings also varies with the temperature of the surrounding ambient medium [101]. Therefore, when selecting bearing grease, it is necessary to consider not only the dropping point temperature of the grease but also parameters such as the type of its base oil, antioxidant properties, and evaporation properties, as well as the influence brought about by the temperature of the ambient medium [102,103].…”

Section: Selection Of Bearing Greasementioning

confidence: 99%

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Peng,

Zhao,

Shangguan

et al. 2023

Coatings

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With the significant penetration of wind generation, wind turbines require higher and higher lubrication performance for bearings. To improve the lubrication performance of wind power bearings, this study takes wind power bearings as the research object and comprehensively analyzes the wear forms of wind power bearings as well as intelligent lubrication methods. Firstly, the main roles and wear forms of wind turbine bearings are sorted out and analyzed. Secondly, the common lubrication problems of wind power bearings are analyzed from the bearing grease selection, lubrication mode, and lubrication status, highlighting the important influence of lubrication on bearings. Thirdly, the wind turbine bearing wisdom lubrication method research and organization, mainly including the wind power generation bearing lubrication materials, lubrication devices and monitoring methods, and other issues of research and analysis. Finally, current challenges and future development directions are summarized, which are designed to provide theoretical reference and technical support for the related research and engineering practice in the field of wind power engineering.

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Section: Selection Of Bearing Greasementioning

confidence: 99%

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Peng,

Zhao,

Shangguan

et al. 2023

Coatings

View full text Add to dashboard Cite

show abstract

“…Aerostatic bearings are extensively used in high−precision machining and ultra− precision machining owing to their remarkable attributes, including near−zero friction, high speed, and exceptional accuracy [1][2][3][4]. However, designing nano−positioning devices with high positional accuracy is challenging because of inherent nano−vibrations induced by turbulent vortices [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Performances of Novel Aerostatic Bearings with Primary and Secondary Orifice Restrictors

Yu,

Zuo,

et al. 2023

Lubricants

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Aerostatic bearings are crucial support components in ultra−precision manufacturing equipment. However, improvements in the load−carrying capability (LCC) of aerostatic bearings often lead to higher intensity nano−vibrations. This paper introduces a novel primary and secondary orifice restrictor (PSOR) designed to simultaneously enhance the LCC and mitigate nano−vibrations in aerostatic bearings. The static performance of complex turbulent flows occurring within the chamber of aerostatic bearings with PSORs was investigated. The dynamic performance of the turbulent flows was analyzed through 3D transient numerical simulation using the large eddy simulation method. The LCC and nano−vibration acceleration were measured experimentally, and the results indicated that the design of the secondary orifice diameter could enhance LCC and mitigate nano−vibrations, consistent with theoretical predictions. The accuracy of the proposed model was validated, confirming the effectiveness of PSOR. In the experiments, an aerostatic bearing with a secondary orifice diameter of 0.1 mm exhibited the lowest LCC and largest nano−vibration. Conversely, an aerostatic bearing with a secondary orifice diameter of 0.26 mm exhibited the highest LCC and weakest nano−vibration. This study provides insights into the formation mechanism of turbulent vortex and interaction mechanism among the primary orifice and secondary orifices in aerostatic bearings with a PSOR.

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“…Static pressure spindles and slides are supported and lubricated by static pressure bearings that include aerostatic and hydrostatic bearings, which mainly use air and oil as lubricants [5][6][7][8]. The performance of static pressure bearings can be accurately calculated based on the computational fluid dynamics (CFD) method [9][10][11][12][13]. However, the stiffness of static pressure spindles and slides is not that of their supporting bearings due to the influence of FSI, which is a common phenomenon in many fields [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Mechanism of Fluid-Structure Interaction on Stiffness of Static Pressure Spindles and Slides

et al. 2023

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The stiffness of static pressure spindles and slides is affected by the phenomenon of fluid-structure interaction (FSI). Many methods have been proposed to calculate the stiffness with FSI considered. However, the influence of FSI on stiffness is still unknown. This paper studies the lateral stiffness of an aerostatic slide. The relationship between the lateral stiffness of the aerostatic slide, the lateral bearings, and the solid structure is deduced. According to the relationship, this paper proposes a theory that reveals the influence mechanism of FSI on the stiffness of static pressure spindles and slides. The proposed theory is also valid for the normal stiffness of the aerostatic slide and the thrust stiffness of an aerostatic spindle.

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Influence of Operating Temperature on the Static Characteristics of an Externally Pressurized Thrust Bearing Lubricated with Refrigerant Gas

Cited by 3 publications

References 26 publications

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Static and Dynamic Performances of Novel Aerostatic Bearings with Primary and Secondary Orifice Restrictors

Influence of the Mechanism of Fluid-Structure Interaction on Stiffness of Static Pressure Spindles and Slides

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