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Analysis of Dynamic Pressure Gas Thrust Bearing Characteristics with Wedge-shaped Spiral Grooves Based on Fluid-Structure-Thermal Coupling.

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Title: Analysis of Dynamic Pressure Gas Thrust Bearing Characteristics with Wedge-shaped Spiral Grooves Based on Fluid-Structure-Thermal Coupling.
Authors: Dong, Zhiqiang1 dongzhiqiang@tyust.edu.cn, Dong, Yifei2 1424237680@qq.com
Source: Engineering Letters. Feb2026, Vol. 34 Issue 2, p538-553. 16p.
Subjects: Thrust bearings, Dynamic pressure, Fluid-structure interaction, Engineering simulations, Thermal properties, Dynamic loads, Fluid dynamics
Abstract: To address the reduced load capacity of conventional spiral-groove thrust bearings caused by insufficient high-pressure gas buildup at the groove tops, this study introduces a wedge-shaped spiral groove design featuring a composite top structure. A converging wedge is incorporated at the groove top to enhance gas compression by gradually narrowing the flow cross-section, thereby increasing pressure generation. Using ANSYS-based fluid-structure-thermal coupled simulations, we analyzed and compared the flow and thermal characteristics of traditional and wedge-shaped spiral groove bearings. The results indicate that the wedge design increases load capacity by 2% to 4% under identical operating conditions. For both bearing types and the thrust plate, maximum stress, deformation, and temperature rise with increasing rotational speed and inlet pressure. Thrust bearings consistently experience higher stress and deformation than the thrust plate, with the wedge-shaped grooves exhibiting greater stress and deformation compared to traditional grooves. [ABSTRACT FROM AUTHOR]
Copyright of Engineering Letters is the property of International Association of Engineers (IAENG) and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Analysis of Dynamic Pressure Gas Thrust Bearing Characteristics with Wedge-shaped Spiral Grooves Based on Fluid-Structure-Thermal Coupling.
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  Data: <searchLink fieldCode="AR" term="%22Dong%2C+Zhiqiang%22">Dong, Zhiqiang</searchLink><relatesTo>1</relatesTo><i> dongzhiqiang@tyust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Dong%2C+Yifei%22">Dong, Yifei</searchLink><relatesTo>2</relatesTo><i> 1424237680@qq.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Engineering+Letters%22">Engineering Letters</searchLink>. Feb2026, Vol. 34 Issue 2, p538-553. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Thrust+bearings%22">Thrust bearings</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+pressure%22">Dynamic pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid-structure+interaction%22">Fluid-structure interaction</searchLink><br /><searchLink fieldCode="DE" term="%22Engineering+simulations%22">Engineering simulations</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+properties%22">Thermal properties</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+loads%22">Dynamic loads</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To address the reduced load capacity of conventional spiral-groove thrust bearings caused by insufficient high-pressure gas buildup at the groove tops, this study introduces a wedge-shaped spiral groove design featuring a composite top structure. A converging wedge is incorporated at the groove top to enhance gas compression by gradually narrowing the flow cross-section, thereby increasing pressure generation. Using ANSYS-based fluid-structure-thermal coupled simulations, we analyzed and compared the flow and thermal characteristics of traditional and wedge-shaped spiral groove bearings. The results indicate that the wedge design increases load capacity by 2% to 4% under identical operating conditions. For both bearing types and the thrust plate, maximum stress, deformation, and temperature rise with increasing rotational speed and inlet pressure. Thrust bearings consistently experience higher stress and deformation than the thrust plate, with the wedge-shaped grooves exhibiting greater stress and deformation compared to traditional grooves. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Engineering Letters is the property of International Association of Engineers (IAENG) and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 16
        StartPage: 538
    Subjects:
      – SubjectFull: Thrust bearings
        Type: general
      – SubjectFull: Dynamic pressure
        Type: general
      – SubjectFull: Fluid-structure interaction
        Type: general
      – SubjectFull: Engineering simulations
        Type: general
      – SubjectFull: Thermal properties
        Type: general
      – SubjectFull: Dynamic loads
        Type: general
      – SubjectFull: Fluid dynamics
        Type: general
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      – TitleFull: Analysis of Dynamic Pressure Gas Thrust Bearing Characteristics with Wedge-shaped Spiral Grooves Based on Fluid-Structure-Thermal Coupling.
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            NameFull: Dong, Zhiqiang
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            – D: 01
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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