Texture Optimization and Verification for the Thrust Bearing Used in Rotary Compressors Based on a Transient Tribo-Dynamics Model

Lyu, Bugao; Jing, Lilong; Meng, Xianghui; Liu, Ruichao

doi:10.1115/1.4053261

Cited by 11 publications

(3 citation statements)

References 44 publications

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“…Ref. [33] mentioned that due to the influence of fluid inertial force, textures with a depth of more than 10 µm may cause the Reynolds equation to no longer be applicable. In addition, the texture width should be related to the size of the texture unit and designed within the texture unit.…”

Section: Constraintsmentioning

confidence: 99%

Research on the Optimal Design Approach of the Surface Texture for Journal Bearings

Gu,

Cui,

Zhang

2024

Lubricants

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Aiming to improve the comprehensive performance of the journal bearing system, this paper presents a multi-objective adaptive scale texture optimization design approach. A mixed lubrication model for the textured journal bearing system is established by considering the effects of cavitation and roughness. The geometrical parameters of the textures were co-optimized using a multi-objective grey wolf optimizer to obtain the optimal texture schemes that are suitable for different operating conditions. Through this approach, the influences of different texture schemes under transient operating conditions can be investigated. According to the results, it was found that different texture schemes result in different friction reduction effects. Proper surface texture is beneficial in increasing the minimum oil film thickness and reducing the possibility of asperity contact. The adaptive scale texture exhibits strong adaptability and achieves significant hydrodynamic effects. Therefore, the developed approach provides valuable insights for the optimization design of journal bearing systems.

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Section: Constraintsmentioning

confidence: 99%

Research on the Optimal Design Approach of the Surface Texture for Journal Bearings

Gu,

Cui,

Zhang

2024

Lubricants

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“…Truong et al [21] developed a method to measure the thermal behavior of high-speed spindles, which can generate a bearing stiffness matrix while considering thermal expansion effects. In tribology research, Lyu et al [22] , from Shanghai Jiao Tong University, employed three different optimization algorithms to construct a transient dynamic model that coupled journal with thrust bearings for texture optimization studies.The results confirmed that textured thrust bearings exhibit reduced wear depth, thereby improving work efficiency. A team from the Technion-Israel Institute of Technology [23] proposed a finite element model based on the coupled Euler-Lagrange (CEL) method to comprehensively explain the anomalous static friction generated by spherical contact with ultra-thin soft coatings.…”

Section: Introductionmentioning

confidence: 99%

Stiffness characteristics of angular contact ball bearing considering thermal - mechanical coupling

gao,

xu,

chen

et al. 2024

Preprint

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When the rotor is rotating at high speed, the ball bearing stiffness exhibits strong nonlinear characteristics. This paper primarily investigates the influence of different speeds, axial loads, and other factors on the angular contact ball bearing stiffness. To address the inconvenience of simultaneously simulating dynamic temperature fields and deformation results using ANSYS software, a novel coupling method is proposed to achieve simulation results that closely resemble actual working conditions. By utilizing a MATLAB script program based on Palmgren's friction heat generation theory, real-time extraction of frictional heat generation in high-speed angular contact ball bearings under combined shaft action, radial load, and speed is achieved. The obtained heat generation results are then applied as boundary conditions in the finite element model of bearings to establish a coupling field for further analysis. Subsequently, Ansys Workbench simulates the impact of this coupling model on relative displacement between inner and outer rings under identical load and speed conditions to ultimately obtain dynamic stiffness results for angular contact ball bearings. A novel approach to calculating stiffness was introduced in the subsequent bearing stiffness test bench, wherein the radial load and relative displacement of the measured angular contact ball bearing were determined by converting material mechanics formulas. This method effectively addresses the inconvenience of measuring bearing stiffness in rotor systems and aligns with simulation results.The findings indicate that bearing dynamic stiffness increases with axial load at constant speed, with axial stiffness being greater than radial stiffness. Additionally, higher rotational speeds under coaxial loads result in more pronounced increases in frictional heat but lead to decreased overall stiffness. The feasibility of simulation results from thermal-mechanical coupling models has been demonstrated.

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“…The thrust bearings with optimized geometric parameters significantly reduced the contact force and wear depth at high frequency. Mishra et al [41] investigated the tribological behaviors of LST for a scroll compressor within different refrigeration ambients, and the surface texturing showed significant tribological improvements, largely independent of the type of lubricant or refrigerant.…”

Section: Introductionmentioning

confidence: 99%

The Tribological Behavior of Cast Iron by Laser Surface Texturing under Oil-Lubricated Initial Line Contact for Rotary Compressor

Ding,

Hu,

Wei

et al. 2023

Lubricants

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The tribological behaviors of cast iron by laser surface texturing were experimentally compared with the behavior of untextured by unidirectional rotary sliding friction and wear tests under oil-lubricated initial line contact. The friction coefficient and temperature rise were analyzed with the increasing load applied by block-on-ring tests. In addition, the wear loss and wear mechanism were also investigated through the surface topographies analysis. The results showed that the tribological improvement strongly depended on the contact form. For the oil-lubricated initial line contact in this work, the textured surface showed a better frictional advantage with a lower friction coefficient and lower temperature rise. The hydrodynamic effect enhanced the load-carrying capacity of the oil film and increased the film thickness. The friction coefficients were 11~64% lower than those on the untextured one. Meanwhile, the textured surface deteriorated the wear behavior due to the coupling effect between the micro-cutting effect of the texture edges and the material deformations of the counter surface. The material loss induced by abrasive wear and fatigue wear was the dominant wear mechanism. Namely, the laser surface texturing improved the friction properties but reduced the wear resistance.

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Texture Optimization and Verification for the Thrust Bearing Used in Rotary Compressors Based on a Transient Tribo-Dynamics Model

Cited by 11 publications

References 44 publications

Research on the Optimal Design Approach of the Surface Texture for Journal Bearings

Research on the Optimal Design Approach of the Surface Texture for Journal Bearings

Stiffness characteristics of angular contact ball bearing considering thermal - mechanical coupling

The Tribological Behavior of Cast Iron by Laser Surface Texturing under Oil-Lubricated Initial Line Contact for Rotary Compressor

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