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Artykuły w czasopismach na temat „Bearing characteristics”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 26 lipca 2025

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1

Lin, Xi Chen, Rui Ping Zhou, and Neng Qi Xiao. "Influence Characteristics of Fluid Film Bearing’s Displacement-Load on Rotating Vibration of Rotor System." Applied Mechanics and Materials 727-728 (January 2015): 567–71. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.567.

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In high load-carrying bearing-rotor system, bearings’ places usually change for load distribution or in continual work. It influences the system’s stability, and brings out different vibration response in rotor system. This article puts forward mathematical model of bearing’s stiffness under load which is calculated from bearing displacement. Then through numerical integration it studies system’s rotating vibration with different bearing settings. The results of the analysis show that bearing displacement has a great effect on dynamic characteristics of the bearing-rotor system.

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2

Strzelecki, Stanisław. "STATIC CHARACTERISTICS OF OFFSET 8-LOBE JOURNAL BEARINGS." Tribologia 295, no. 1 (2021): 39–51. http://dx.doi.org/10.5604/01.3001.0015.4899.

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The 8-lobe journal bearings have found application in the bearing systems of spindles of grinding machines. The design of bearings and the large number of lobes and oil grooves assures good cooling conditions of bearing. These bearings can be manufactured as the bearings with cylindrical, non-continuous operating surfaces separated by six lubricating grooves, bearings with the pericycloidal shape of the bearing bore, and as offset journal bearing. This paper presents the results of the computation of static characteristics of an offset 8-lobe journal bearing operating under the conditions of a

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3

Gao, Hang, Qing Lv, and Li Gang Qu. "Influence of Groove Slotting for Micro-Sensor Embedding on Smart Bearing's Mechanical Characteristics." Key Engineering Materials 297-300 (November 2005): 562–66. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.562.

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It is necessary to slot a groove on the outside of the bearing’s raceway in order to embed micro-sensor for smart bearing. Reasonable choice of slotting parameters for different type of bearings is one of key problems to be solved in smart bearing design. In this paper three-dimensional solid model and corresponding mechanics model for a segment of ball bearing’s out ring are built according to some reasonable simplification and supposition of boundary condition and loading status. Further more the influence of slotting parameters on smart bearing’s mechanical characteristics is studied with F

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4

Ngo, Thi-Thao, Van-The Than, Chi-Chang Wang, and Jin H. Huang. "Analyzing characteristics of high-speed spindle bearing under constant preload." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 232, no. 5 (2017): 568–81. http://dx.doi.org/10.1177/1350650117723484.

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Bearings play an important role in a high-speed spindle. Its characteristics are often influenced by speed and thermal effects. This paper presents an approach that combines an inverse method with a high-speed ball bearing model to determine the characteristics of a high-speed spindle bearing under constant preload in actual working conditions. With temperature distribution in the entire spindle obtained by the experimental inverse heat transfer model from the authors’ previous results, the change in bearing parameters is then calculated and subsequently replaced in the bearing model to analyz

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5

Feng, N. S., and E. J. Hahn. "Vibration Characteristics of Hydrodynamic Fluid Film Pocket Journal Bearings." Advances in Acoustics and Vibration 2010 (December 27, 2010): 1–10. http://dx.doi.org/10.1155/2010/589318.

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Theoretical analyses of hydrodynamic fluid film bearings with different bearing profiles rely on solutions of the Reynolds equation. This paper presents an approach used for analysing the so-called pocket bearings formed from a combination of offset circular bearing profiles. The results show that the variation of the dynamic bearing characteristics with different load inclinations for the pocket bearings is less than that for the elliptic bearing counterpart. It is shown that the natural frequencies as well as the critical speeds, and hence the vibrational behaviour, can also be significantly

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6

Chen-Hui, Jia, Du Cai-Feng, and Qiu Ming. "Research on Nonlinear Dynamic Characteristics and Stability of Aerodynamic Bearings." Open Mechanical Engineering Journal 8, no. 1 (2014): 243–50. http://dx.doi.org/10.2174/1874155x01408010243.

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In order to research the conical spiral groove aerodynamic bearings, the lubrication mathematical model of the bearings was established. The Reynolds equation of the laminar flow condition is used to calculate the partial differential equation of the perturbation pressure with the local finite difference method. Through calculating the stiffness and damping coefficient, the influence of the speed of law and eccentricity ratio on the dynamic characteristic coefficients has been gained. The mathematical model for the stability of the bearing-rotor system is established to study the influence law

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7

Strzelecki, Stanisław, Dominik Olbrzymek, and Jakub Olbrzymek. "STATIC CHARACTERISTICS OF 3-LOBE JOURNAL BEARINGSWITH DIFFERENT LOBES OF GEOMETRY." Tribologia 305, no. 3 (2023): 71–80. http://dx.doi.org/10.5604/01.3001.0053.9438.

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The 3-lobe journal bearings have found application in high-speed bearing systems. The bearing design andthe number of lobes and oil grooves ensure good cooling conditions for the bearings. These bearings can bemanufactured as bearings with cylindrical, non-continuous operating surfaces separated by six lubricatinggrooves, bearings with a pericycloid shape of bearing bore and Offset ones.This paper presents the results of the computation of static characteristics of the 3-lobe journal bearing withthe lobes of different geometry. The conditions of an aligned axis of the journal and sleeve and th

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8

Yang, Jian Xi, Fa Yu Zhang, Jian Ting Liu, and Jian Fang Zhou. "Load-Carrying Capacity Analysis for Sinusoidal Surfaces Hydrodynamic Bearing." Advanced Materials Research 295-297 (July 2011): 1244–50. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1244.

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To obtain a new method to improve hydrodynamic bearing carrying capacity, hydrodynamic journal bearing’s characteristics as well as the current study direction are analyzed. According to the calculation of general cylindrical hydrodynamic journal bearing, the mathematic model for sinusoidal surface hydrodynamic bearing’s carrying capacity is established. It is used to calculate, analyze and compare these two bearings’ carrying capacity with example. The bearing, which has the characteristic of sinusoidal surface, has stronger carrying capacity than general cylindrical hydrodynamic bearing. Wha

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9

Zheng, Yueqing, Tianwei Lai, Shuangtao Chen, Liang Chen, Liqiang Liu, and Yu Hou. "Static characteristics of six pads multilayer protuberant foil thrust bearings." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 231, no. 2 (2016): 158–64. http://dx.doi.org/10.1177/1350650116649328.

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The multilayer protuberant foil bearing, as a new type of compliant surface foil bearing, shows a great and wide application promise. Six pads multilayer protuberant foil thrust bearings with different configurations were designed and fabricated in this study. The static characteristics of these bearings and the effects of their key configuration parameters including the thickness of top foil, the thickness of protuberant foil, and the layers of protuberant foil are investigated. The experimental results reveal that the bearings show nonconstant structural stiffness, and the stiffness mainly d

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10

Keller, Jonathan, Yi Guo, Zhiwei Zhang, and Doug Lucas. "Comparison of planetary bearing load-sharing characteristics in wind turbine gearboxes." Wind Energy Science 3, no. 2 (2018): 947–60. http://dx.doi.org/10.5194/wes-3-947-2018.

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Abstract. In this paper, the planetary load-sharing behavior and fatigue life of different wind turbine gearboxes when subjected to rotor moments are examined. Two planetary bearing designs are compared – one design using cylindrical roller bearings with clearance and the other design using preloaded tapered roller bearings to support both the carrier and planet gears. Each design was developed and integrated into a 750 kW dynamometer tests, the loads on each planet bearing row were measured and compared to finite-element models. Bearing loads were not equally shared between the set of cylindr

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11

Goodwin, M. J., P. J. Ogrodnik, M. P. Roach, L. K. Lim, and Y. Fang. "Steady Load-Carrying Capacity of Recessed Hydrodynamic Bearings." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 209, no. 4 (1995): 255–62. http://dx.doi.org/10.1243/pime_proc_1995_209_436_02.

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Oil-film hydrodynamic bearings are one of the most common forms of bearing used in rotating machinery. Because of their effect on system unbalance response and stability, care has to be exercised in the design of machines running in hydrodynamic bearings—for example they cannot usually be used in machines operating at high rotational speeds when the steady load on the bearing is low. A novel form of hydrodynamic bearing which incorporates recesses in the bearing surface has been proposed by the authors which improves the dynamic characteristics; however, earlier work has not fully assessed the

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12

Jia, Zhining, and Caizhe Hao. "Thermal-Tribological Synergy in PTFE-Based Self-Lubricating Retainers for Ball Bearings Under Oil-Depleted Conditions." Lubricants 13, no. 7 (2025): 280. https://doi.org/10.3390/lubricants13070280.

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To investigate the temperature rise characteristics and tribological performance of angular contact ball bearings equipped with polymer-based self-lubricating retainers under oil-depleted conditions. PTFE-based composite retainers were fabricated using cold-press sintering technology. Comparative experiments on 7206C were conducted on three bearing configurations (domestic, imported NSK, and YSU-S1/S2 self-lubricating retainer bearing) using a dedicated fatigue tester under oil-depleted lubrication. This study demonstrates that angular contact ball bearings equipped with PTFE-based self-lubric

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13

Yang, Taiwei, Hanhua Zhu, Shidong Fan, Jie Wu, Junlang Yuan, and Liangyan Zheng. "Research on Lubrication Characteristics of Ship Stern Bearings Considering Bearing Installation Errors." Lubricants 11, no. 11 (2023): 478. http://dx.doi.org/10.3390/lubricants11110478.

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The installation quality of a propulsion shaft system directly affects the lubrication statuses of the bearings. The quality of the shaft system installation not only affects the progress of ship construction, but also the safety, stability, and reliability of the shaft system. This article takes sliding bearings in ship shafting as the research object and establishes a hydrodynamic lubrication model of sliding bearings while considering installation errors to address the issue of installation errors of ship stern bearings. The finite difference method and super-relaxation iteration method are

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14

Nazin, Vladimir. "Identifying the influence of design parameters of single-chamber hydrostatic bearing of fuel pump on its main characteristics." Eastern-European Journal of Enterprise Technologies 1, no. 7 (127) (2024): 30–36. http://dx.doi.org/10.15587/1729-4061.2024.298646.

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The object of this study is hydrostatic processes in the fluid friction bearings of gear-type aviation fuel pumps. The problem of the influence of the design parameters of a single-chamber hydrostatic bearing on its main characteristics was solved. The main characteristics were considered to be the load-bearing capacity and the flow rate of the working fluid. When determining the main characteristics of a single-chamber hydrostatic bearing, the Reynolds and flow balance equations were solved jointly. The resulting diagram of pressure distribution over the working surface of the bearing was use

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15

Polyakov, Roman, Leonid Savin, and Denis Shutin. "Reliability Improvement of Rotor Supports by Combining Rolling-Element Bearings and Fluid-Film Bearings." Applied Mechanics and Materials 630 (September 2014): 188–98. http://dx.doi.org/10.4028/www.scientific.net/amm.630.188.

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Reliability of rotating machinery is determined to a considerable degree by the bearing units. For several applications the requirements in rotation speed, bearing load and maximal vibration level are so extreme that neither rolling-element bearings nor fluid-film bearings could provide necessary performance characteristics during all regimes of operation. Hybrid bearings, which are a combination of rolling-element and fluid-film bearings, can improve performance characteristics and reliability of the rotor-bearing systems. The aim of this work is to analyze the advantages and disadvantages of

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16

Polyakov, Roman, Leonid Savin, and Alex Fetisov. "Analysis of the conditions for the occurrence of the effect of a minimum of friction in hybrid bearings based on the load separation principle." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, no. 2 (2018): 271–80. http://dx.doi.org/10.1177/1350650118777143.

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Reliability of rotating machinery is determined to a considerable degree by the bearing units. For several applications the requirements in rotational speed, bearing load and maximal vibration level are so extreme that neither rolling-element bearings nor fluid-film bearings could provide necessary operating characteristics during all regimes of operation. Hybrid bearings, which are a combination of rolling-element and fluid-film bearings, can improve performance characteristics and reliability of the rotor-bearing systems. A hybrid bearing, where a rolling-element bearing and a fluid-film bea

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17

Yi, Howon, Hyunsung Jung, Kyuman Kim, and Keun Ryu. "Static Load Characteristics of Hydrostatic Journal Bearings: Measurements and Predictions." Sensors 22, no. 19 (2022): 7466. http://dx.doi.org/10.3390/s22197466.

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Hydrostatic bearings for liquid rocket engine turbopumps provide distinctive advantages, including high load capacity even with low viscosity cryogenic fluid and extending life span by minimizing friction and wear between rotor and bearing surfaces. Application of hydrostatic bearings into turbopumps demands a reliable test database with well-quantified operating parameters and experimentally validated accurate performance predictive tools. The present paper shows the comprehensive experimental data and validation of predicted static load characteristics of hydrostatic journal bearings lubrica

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18

Qiu, Ming, Zhi Lun Gao, Guo Feng Wang, and Long Chen. "Tribological Properties of Spherical Plain Bearings with Self-Lubricating PTFE Woven Liners." Advanced Materials Research 338 (September 2011): 607–10. http://dx.doi.org/10.4028/www.scientific.net/amr.338.607.

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The friction and wear behaviors of three kinds of spherical plain bearings with PTFE fabric composite liners were investigated by a high oscillating frequency and heavy load tribo-tester. Dry sliding tests were carried out at different oscillating frequencies. With the help of SEM and EDS, the differences of worn surfaces of the three spherical bearings were investigated. The results indicate that the fiber woven with PTFE effects the friction and wear characteristics of bearing, the tribological properties of bearing with Kevlar/PTFE fiber woven liner is the best in the three kinds of bearing

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19

Sawano, Hiroshi. "Relationship Between Fluid Properties and Bearing Stiffness in Water Hydrostatic Bearing." International Journal of Automation Technology 14, no. 1 (2020): 73–79. http://dx.doi.org/10.20965/ijat.2020.p0073.

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Hydrostatic bearings are important elements that directly affect machining accuracy in machine tools. Although hydrostatic bearings using water can reduce environmental influence compared with those using oil, they have low rigidity and damping properties. By investigating the properties of water used for working fluid of hydrostatic bearings, there is a possibility that the characteristics of hydrostatic bearings using water can be improved. Therefore, in this study, the relationship between the properties of water used as a working fluid of hydrostatic bearings and the characteristics of bea

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20

Yu, Yongjian, Ruixiang Ma, Yujun Xue, and Yonggang Liu. "Study on Thermal Characteristics of Angular Contact Ball Bearings Considering Roundness Error." Lubricants 12, no. 2 (2024): 43. http://dx.doi.org/10.3390/lubricants12020043.

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To develop an angular contact ball bearing with low power consumption, a heat generation calculation model for angular contact ball bearings has been established based on bearing quasi dynamics, elastohydrodynamic lubrication theory, heat transfer theory, and Kirchhoff’s law of energy conservation, considering the effects of roundness error, bearing preload, centrifugal effect, and thermal expansion. The correctness of the model is verified through experiments. The influence of different operating conditions and roundness errors on the thermal characteristics of angular contact ball bearings i

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21

Wang, You Qiang, and Li Jing Zhang. "Characteristics and Outline of Water-Lubricated Thordon Bearing." Advanced Materials Research 496 (March 2012): 355–58. http://dx.doi.org/10.4028/www.scientific.net/amr.496.355.

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Thordon is a new liner material used widely in water-lubricated bearings in virtue of its shockproof characteristic, high load and wear resistance. The category of materials used in water-lubricated bearings was briefly outlined and tribological characteristics of most of the materials were compared in the paper. The defects of the traditional water-lubricated bearing materials were listed and the advantage of the Thordon bearing was presented. The development status and the tribological characteristics of the water-lubricated Thordon bearings were studied. The application prospects of the wat

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22

Lu, Chen, Qian Sun, Laifa Tao, Hongmei Liu, and Chuan Lu. "Bearing Health Assessment Based on Chaotic Characteristics." Shock and Vibration 20, no. 3 (2013): 519–30. http://dx.doi.org/10.1155/2013/645308.

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Vibration signals extracted from rotating parts of machinery carry a lot of useful information about the condition of operating machine. Due to the strong non-linear, complex and non-stationary characteristics of vibration signals from working bearings, an accurate and reliable health assessment method for bearing is necessary. This paper proposes to utilize the selected chaotic characteristics of vibration signal for health assessment of a bearing by using self-organizing map (SOM). Both Grassberger-Procaccia algorithm and Takens' theory are employed to calculate the characteristic vector whi

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23

Baroud, Charles, Ilene Busch-Vishniac, and Kristin Wood. "Induced Micro-Variations in Hydrodynamic Bearings." Journal of Tribology 122, no. 3 (1999): 585–89. http://dx.doi.org/10.1115/1.555405.

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Fluid-structure interactions in hydrodynamic bearings result in load carrying and drag forces which give the bearing its characteristics. While these bearings offer many benefits as machine components, one of their shortcomings is their limited efficient range. In this paper, we demonstrate the use of micron-scale actuators to actively control the thrust and drag forces on a slider bearing. We show that for a set of control parameters, we are able to affect the performance of a bearing by more than 100 percent during operation, increasing the bearing’s range of operation. [S0742-4787(00)01602-

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24

Liu, Yang, Jiyuan Han, Siyao Zhao, Qingyu Meng, Tuo Shi, and Hui Ma. "Study on the Dynamic Problems of Double-Disk Rotor System Supported by Deep Groove Ball Bearing." Shock and Vibration 2019 (February 26, 2019): 1–12. http://dx.doi.org/10.1155/2019/8120569.

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Aiming at the analysis of the dynamic characteristics of the rotor system supported by deep groove ball bearings, the dynamic model of the double-disk rotor system supported by deep groove ball bearings was established. In this paper, the nonlinear finite element method is used combined with the structural characteristics of deep groove ball bearings. Based on the nonlinear Hertz contact theory, the mechanical model of deep groove ball bearings is obtained. The excitation response results of the rotor system nodes are solved by using the Newmark-β numerical solution method combined with the Ne

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25

Lee, Dong-Soo, and Dong-Hoon Choi. "A Dynamic Analysis of a Flexible Rotor in Ball Bearings with Nonlinear Stiffness Characteristics." International Journal of Rotating Machinery 3, no. 2 (1997): 73–80. http://dx.doi.org/10.1155/s1023621x97000080.

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This paper presents an effective analysis approach for a flexible rotor in ball bearings with nonlinear stiffness characteristics to obtain realistic dynamic behavior results. The ball bearing is modeled in five degrees of freedom and the nonlinear stiffness characteristics of the bearing are completely described as functions of combined loads and spin speed. For dynamic behavior analysis of the nonlinear rotor-bearing system, a transfer-matrix method is iteratively used until the bearing displacements and the shaft displacements at every bearing location converge to the same values. The resul

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26

Ren, Tianming, and Ming Feng. "Static Characteristics of a Micro Bidirectional Rotating Thrust Bearing with Novel Herringbone Grooves." Lubricants 13, no. 3 (2025): 109. https://doi.org/10.3390/lubricants13030109.

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Bidirectional rotating thrust bearings are critical components for the development of bidirectional equipment. This paper presents the design and numerical study of an oil-lubricated bidirectional rotating thrust bearing with novel herringbone grooves, which consists of three groups of spiral grooves. The lubrication mechanism of the novel herringbone grooves is revealed. The static characteristics of the thrust bearing are numerically investigated by solving the Reynolds equation applying the finite element method. The influences of the radial width, depth, angle, circumferential width ratio,

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27

Hong, Sung-Ho, and Woo-Ju Jeon. "Lubrication Performance of Misaligned Journal Bearings with Flexible Structure under Shock Load Conditions." Lubricants 11, no. 12 (2023): 500. http://dx.doi.org/10.3390/lubricants11120500.

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Bearings might be damaged due to shock loads caused by disturbances, in addition to static loads. In this study, a flexible structure was applied to enhance the lubrication characteristics of misaligned journal bearings subjected to impact loads. When an impact load is added to the bearing, a misaligned journal bearing has a high possibility of metal-to-metal contact. It might also lead to failure. Misalignment can occur at any time during bearing operation. A flexible structure is applied to the end of the bearing as a way to improve lubrication performance in a system where impact loads migh

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28

Lu, Huaiqing, and Zhuxin Tian. "Investigation of the Static Performance of Hydrostatic Thrust Bearings Considering Non-Gaussian Surface Topography." Lubricants 11, no. 6 (2023): 267. http://dx.doi.org/10.3390/lubricants11060267.

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The dynamic and static characteristics of hydrostatic thrust bearings are significantly affected by the bearing surface topography. Previous studies on hydrostatic thrust bearings have focused on Gaussian distribution models of bearing surface topography. However, based on actual measurements, the non-Gaussianity of the distribution characteristics of bearing surface topography is clear. To accurately characterize the non-Gaussian distribution of bearing surface topography, the traditional probability density function of Gaussian distribution was modified by introducing Edgeworth expansion. Th

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29

Guo, Zhiqiang, Shenlong Li, Wei Wu, and Liuyang Zhang. "Quasi-Static Load Sharing Characteristics of a Planetary Gear Set with Planet Journal Bearings." Applied Sciences 10, no. 3 (2020): 1113. http://dx.doi.org/10.3390/app10031113.

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The quasi-static load sharing characteristics of a planetary gear set with planet journal bearings are numerically investigated. The application of journal bearings instead of rolling bearings in planetary gear sets is an alternative to increase the rotation speed. Therefore, an effective analysis method is needed to estimate the dynamic performance of a planetary gear set with planet journal bearings. Here, an available load sharing factor computation method is developed considering the effect of the variable journal bearing stiffness. Results of an experiment are used to validate the effecti

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30

Schüler, Eckhard, and Olaf Berner. "Improvement of Tilting-Pad Journal Bearing Operating Characteristics by Application of Eddy Grooves." Lubricants 9, no. 2 (2021): 18. http://dx.doi.org/10.3390/lubricants9020018.

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In high speed, high load fluid-film bearings, the laminar-turbulent flow transition can lead to a considerable reduction of the maximum bearing temperatures, due to a homogenization of the fluid-film temperature in radial direction. Since this phenomenon only occurs significantly in large bearings or at very high sliding speeds, means to achieve the effect at lower speeds have been investigated in the past. This paper shows an experimental investigation of this effect and how it can be used for smaller bearings by optimized eddy grooves, machined into the bearing surface. The investigations we

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31

Tian, Zhuxin, and Guohua Chen. "Discussion on dynamic characteristics of long journal bearings considering surface roughness." Advances in Mechanical Engineering 14, no. 11 (2022): 168781322211364. http://dx.doi.org/10.1177/16878132221136451.

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The hydrodynamic bearing is the key part of many rotating machines, and dynamic characteristics of the bearing would affect the operation performance of machines directly. Thus, this study focused on dynamic characteristics of long journal bearings and tried to illustrate the influence of surface roughness on dynamic performances of long bearings. Applying Christensen stochastic model and long bearing approximation, the modified Reynolds equation was established. To solve the modified Reynolds equation, the numerical integration method was applied. It is found that the surface roughness would

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32

Lu, Zhi-wei, Jun-an Zhang, and Bo Liu. "Research and Analysis of the Static Characteristics of Aerostatic Bearings with a Multihole Integrated Restrictor." Shock and Vibration 2020 (February 29, 2020): 1–11. http://dx.doi.org/10.1155/2020/7426928.

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In order to further study the performance of aerostatic bearing, an aerostatic bearing with a multihole integrated restrictor was proposed in this paper. Based on the physical model of aerostatic bearings, the governing equation was established, deduced discretely, and solved numerically by the finite-difference method and flow balance principle in Cartesian coordinates. The bearing capacity and stiffness of aerostatic bearings have been analyzed, and the relevant experimental research has been carried out in this paper. The results showed that the number of orifices in the integrated restrict

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33

Fu, Chengguo, Ting Chen, Hui Yang, et al. "Analysis of Temperature Characteristics of Double-Row Spherical Roller Bearings Based on CFD." Lubricants 13, no. 2 (2025): 85. https://doi.org/10.3390/lubricants13020085.

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Double-row spherical roller bearings are frequently employed as supporting components in mining machinery. In practice, these bearings are lubricated manually, and the bearing chamber is filled with grease, which can lead to issues such as grease wastage and increased bearing temperatures. Additionally, factors such as load and speed also influence the bearing temperature, collectively contributing to inadequate lubrication and potential bearing failure. Consequently, it is essential to investigate the temperature of the bearing under operating conditions. Utilizing tribology theory and the pr

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34

Zhang, Xing Hui, Jian She Kang, Jian Min Zhao, and Hong Zhi Teng. "Enhanced Fault Diagnosis of Bearings in Gearbox Based on Lucy-Richardson Deconvolution and Discussion." Applied Mechanics and Materials 764-765 (May 2015): 264–68. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.264.

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Bearings are one of the most important components in rotating machineries. Their failures will lead to great production loss and increase the maintenance cost. So, condition monitoring work of bearings can save and avoid the potential loss caused by bearing fault. Lucy-Richardson deconvolution (LRD) algorithm, as an image processing technique, started to be used in bearing fault diagnosis. However, only data of bearings working in electric motor are used to validate the method. In engineering cases, most bearings are working in gearbox. Therefore, the bearing fault signals are very weak compar

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35

Shi, Zhifeng, Jing Liu, and Shaojiang Dong. "A numerical study of the contact and vibration characteristics of a roller bearing with a surface crack." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 234, no. 4 (2020): 549–63. http://dx.doi.org/10.1177/1464420720903075.

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Roller bearings are key parts in different machineries. As one of the major incipient failure models in the bearings, the surface crack will be enlarged to be a large spalling failure. Moreover, the abrupt changes in the contact characteristics caused by the crack zone would produce unacceptable impulses, which can affect the bearing vibrations. Thus, a study of the contact characteristics and vibrations of the bearings including the surface crack could be conducive for the incipient fault monitoring methods. To overcome this issue, a finite element model is proposed to obtain the influences o

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Masaki, Nobuo, and Shigenobu Suzuki. "Restoring Force Characteristics of Laminated Rubber Bearings Under Various Restraining Conditions." Journal of Pressure Vessel Technology 126, no. 1 (2004): 141–47. http://dx.doi.org/10.1115/1.1637643.

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We conducted the measurement of restoring force characteristics of laminated rubber bearings under various restraining conditions. In the experiment, we provided three laminated rubber bearings with various second shape factors S2=3,4,4.94. The restoring force is obtained by using a newly designed combined loading test apparatus. By using this apparatus, the laminated rubber bearing could be subjected to shear, compressive and rotational deformations independently. In this experiment, we defined the degree of restraint as the ratio of the bending moment to the restricting bending moment which

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Wu, Dengyun, Jianwen Wang, Hong Wang, et al. "An Automatic Bearing Fault Diagnosis Method Based on Characteristics Frequency Ratio." Sensors 20, no. 5 (2020): 1519. http://dx.doi.org/10.3390/s20051519.

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Bearing is a key component of satellite inertia actuators such as moment wheel assemblies (MWAs) and control moment gyros (CMGs), and its operating state is directly related to the performance and service life of satellites. However, because of the complexity of the vibration frequency components of satellite bearing assemblies and the small loading, normal running bearings normally present similar fault characteristics in long-term ground life experiments, which makes it difficult to judge the bearing fault status. This paper proposes an automatic fault diagnosis method for bearings based on

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Wang, Z., Z. C. Yin, Z. N. Wang, and C. M. Chen. "Thermal characteristics analysis of bearing in grinding system of grinding robot." IOP Conference Series: Materials Science and Engineering 1283, no. 1 (2023): 012013. http://dx.doi.org/10.1088/1757-899x/1283/1/012013.

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Abstract Grinding robot is used in building construction to replace manual grinding of concrete components. Bearing in grinding system under high-speed conditions has friction violently with the inner and outer ring, and generates a lot of heat. This will cause thermal failure of grinding system. In order to explore the thermal characteristics of rolling bearings, a numerical analysis model based on bearing heat transfer mechanism was established to study the influence of different working conditions on bearing temperature. The results provide a reference for reducing the thermal failure of ro

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Sun, Huer, Zhao Jian Yang, Qun Long Liang, and Xin Yu Pang. "Characteristics Identification of Overlapping Vibration Signals on Mallat." Advanced Materials Research 97-101 (March 2010): 4375–78. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.4375.

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In rotor-bearing system running, vibration signals measured were an kind of Multi-vibration source signals which is overlapping each other. These overlapping signals were difficult to be separated by the ordinary methods, which is adverse to precisely estimate faults of rotor-bearing system in running. In this paper, a test rig was set up to simulate mis-alignment faults; collected vibration signals of bearings were decomposed and reconstructed by algorithm of Mallat. Reconstructed signal can reflect detail character s of bearings vibration. And vibration signals characteristics of fault rotor

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Kodnyanko, Vladimir, Stanislav Shatokhin, Andrey Kurzakov, et al. "Numerical Modeling on the Compliance and Load Capacity of a Two-Row Aerostatic Journal Bearing with Longitudinal Microgrooves in the Inter-Row Zone." Applied Sciences 11, no. 12 (2021): 5714. http://dx.doi.org/10.3390/app11125714.

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Aerostatic bearings are attractive, with minimal friction losses, high durability, and environmental friendliness. However, such designs have a number of disadvantages, including low load-bearing capacity and high compliance due to high air compressibility and limited injection pressure. The article proposes a double-row aerostatic journal bearing with an external combined throttling system and longitudinal microgrooves in the inter-row zone. It is hypothesized that the use of microgrooves will reduce the circumferential flows of compressed air, as a result of which the compliance should decre

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Su, Yue, Kaifu Xu, Yongqiang Gao, and Lu Jin. "Investigation on the Rotordynamic Characteristics of Turbopumps with Angular Contact Ball Bearings." Vibration 6, no. 3 (2023): 659–79. http://dx.doi.org/10.3390/vibration6030041.

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The support stiffness of the turbopump rotor system with angular contact ball bearing varies with the rotational speed, which leads to the inaccurate prediction of the dynamics of the turbopump rotor system. The model of the rotor bearing system was constructed based on the theoretical model of angular contact ball bearing stiffness, and the dynamics characteristics of the turbopump system were calculated. To verify the accuracy of the stiffness and the dynamics model, a test system of the turbopump rotor with angular contact ball bearings was designed. Since the bearing stiffness cannot be me

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Lin, C. R., and H. G. Rylander. "Performance Characteristics of Compliant Journal Bearings." Journal of Tribology 113, no. 3 (1991): 639–44. http://dx.doi.org/10.1115/1.2920672.

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This investigation of compliant journal bearings is directed toward the fundamental behavior characteristics which are necessary when compliance is factored into the final design. Analytical determintation of performance characteristics are shown as a function of the bearing flexibility. As the deformation coefficient increases, load capacity decreases, the cavitation angle and friction coefficient increase, attitude angle may increase or decrease, stability is improved for attitude angles less than 0.8, and minimum film thickness will occur near the two sides of the bearing.

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Wang, Jianmei, Zhixiong Li, Sadoughi Mohammadkazem, Min Cai, Jianfeng Kang, and Yanan Zhang. "Stability characteristics of lubricating film in mill oil-film bearings." Industrial Lubrication and Tribology 70, no. 1 (2018): 201–11. http://dx.doi.org/10.1108/ilt-12-2016-0318.

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Purpose The stability characteristics of an oil film directly influence the safety and service life of mill oil-film bearings. However, very limited work has been done to address the stability characteristics of mill oil-film bearings. To this end, this paper aims to investigate the stability characteristics of mill oil-film bearings through theoretical and experimental analysis. Design/methodology/approach For the first time, a special designed experiment platform was developed to investigate the stability characteristics of mill oil-film bearings. In addition, a theoretical model of lubricat

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Qiang, Mingchen, Mingzhe Liu, Qi Zhao, Yu Hou, Shaohang Yan, and Tianwei Lai. "Feasibility Analysis of Adopting the Hydrogen Hydrostatic Thrust Bearing." Applied Sciences 13, no. 16 (2023): 9372. http://dx.doi.org/10.3390/app13169372.

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The hydrogen hydrostatic thrust bearing (HHTB) is a key component of hydrogen liquefaction that impacts turbo-expander characteristics. To analyze the feasibility of using the HHTB in this application, characteristics of HHTBs were calculated using a CFD model. To upgrade the performance of the HHTB, the impacts of bearing structure and operating parameters on static performance were investigated. Dynamic characteristics of the HHTB were studied using the dynamic grid method. It was found that the load capacity of the HHTB is less than that of helium-lubricated bearings but higher than that of

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Yang, Yang, Xiaoye Qi, Yongjie Wang, Meiling Wang, Baogang Wen, and Jingyu Zhai. "Dynamic Characteristics of a Cylindrical Roller Bearing with Cage Cracks." Lubricants 13, no. 1 (2025): 25. https://doi.org/10.3390/lubricants13010025.

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Cracks in the cages of bearings frequently appear during manufacturing and operation, directly affecting the dynamic characteristics and reliability of the bearing. A dynamic model of a cylindrical roller bearing with cage cracks was established, in which the interactions between the cage, the roller and rings, and the oil-gas lubrication effects were considered to investigate the influence of cracks. The derived dynamic differential equations of cylindrical roller bearings were solved by means of the modified Newton–Raphson iterative algorithm and the BDF predictive correction algorithm with

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Sun, Jian, Xin Fang, Jinmei Yao, Renyun Guan, Zhe Zhang, and Guangxiang Zhang. "Study on the Effect of Oil Supply on the Sound Field Characteristics of Full Ceramic Ball Bearings under Oil Lubrication." Lubricants 11, no. 3 (2023): 146. http://dx.doi.org/10.3390/lubricants11030146.

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To study the full sound field distribution characteristics of full ceramic ball bearings, reduce the radiation noise of the bearings, and improve their service performance. In this paper, the sound field distribution characteristics of 6206 silicon nitride ceramic deep groove ball bearings are studied under different oil supplies. A mathematical model of the sound field distribution of full ceramic ball bearings under oil lubrication is established, and the validity of the model is verified by experimental data. The bearing cavity simulation model of the full ceramic ball bearing is establishe

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Ren, Tianming, and Ming Feng. "Turbulence Effects on the Dynamic Characteristics of Non-Circular Journal Bearings Under Large Sommerfeld Number Conditions." Lubricants 13, no. 4 (2025): 139. https://doi.org/10.3390/lubricants13040139.

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Turbulence and instability problems are unavoidable challenges for fluid film bearings as rotation speed continues to rise. This paper investigates the effect of turbulence on the dynamic characteristics of two non-circular journal bearings, hybrid two-lobe bearing (TLB) and hybrid three-step recess bearing (TSRB), under large Sommerfeld number conditions. The linear perturbation method and nonlinear trajectory method are employed in this work. The bearing stiffness coefficients, damping coefficients, and threshold speed are determined by solving the perturbed Reynolds equation using the finit

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ZHU, KE-QIN, and JIE PENG. "HYDRODYNAMIC CHARACTERISTICS OF ER FLUID FLOWS IN JOURNAL BEARINGS." International Journal of Modern Physics B 17, no. 01n02 (2003): 205–8. http://dx.doi.org/10.1142/s0217979203017345.

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A numerical analysis is performed on the hydrodynamic characteristics of electrorheological(ER) fluid flows in journal bearings based on the basic hydrodynamic equations. The flow field is assumed to be incompressible and isotropic, the Bingham plastic model is used to describe the behavior of ER fluids. The effect of bearing eccentricity ratio and applied electric field intensity has been studied attentively. It shows that control of the journal bearing through external electric field is much more feasible in high eccentricity ratio bearing than in low eccentricity ratio one.

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Zhou, Lina, Xiaofeng Yang, Zhigang Luo, Jingjing Zhang, Zhen Li, and Xiaodong Wang. "Research on the Lubrication State of the Contact Interface Under the Tilt and Skew State of the Roller of the Aviation Bearing." Lubricants 13, no. 4 (2025): 174. https://doi.org/10.3390/lubricants13040174.

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The lubrication behavior and mechanical characteristics of the main bearing area of an aero-engine main shaft bearing determine the reliability and life of the main shaft bearing. In aero-engine main shaft bearings, the lubricant not only plays the role of lubrication but also affects the dynamic characteristics of the bearing; therefore, if the lubricant drag force is insufficient, it will lead to rolling body slipping. Slipping not only affects the reliability of the bearing operation but also will make the temperature of the contact area instantaneously increase, leading to the occurrence o

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Li, Dongjie, Gang Zhang, Zhuoyuan Li, and Jinhua Sun. "Research on Heat Dissipation Scheme of Active Magnetic Bearing Based on ANSYS." Journal of Physics: Conference Series 2383, no. 1 (2022): 012114. http://dx.doi.org/10.1088/1742-6596/2383/1/012114.

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Compared to mechanical bearings, active magnetic bearings eliminate mechanical friction, resulting in lower energy losses. However, due to the magnetization characteristics and high-frequency working characteristics of the core material of the active magnetic bearing, there will be high wind friction loss, eddy current loss, hysteresis loss and copper loss in the active magnetic bearing. These losses will generate heat and increase the internal temperature of the bearing, which will not only affect the control accuracy of the active magnetic bearing and the stability of the rotor suspension, b

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