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Artykuły w czasopismach na temat „Self Aligning Ball Bearing”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Geng, Keke, and Shengye Lin. "Effect of angular misalignment on the stiffness of the double-row self-aligning ball bearing." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 4 (2019): 946–62. http://dx.doi.org/10.1177/0954406219885979.

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The double-row self-aligning ball bearing commonly runs with angular misalignment between the inner and outer rings, and the angular misalignment significantly affects the bearing performance. However, the effect of angular misalignment on the dynamic characteristics of the double-row self-aligning ball bearing has not been studied thoroughly. This paper investigates the effect of angular misalignment on the stiffness of the double-row self-aligning ball bearing. The quasi-static model for the double-row self-aligning ball bearing is established with five degrees of freedom, namely, three tran

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2

Bercea, I., D. Nélias, and G. Cavallaro. "A unified and simplified treatment of the non-linear equilibrium problem of double-row rolling bearings. Part 1: Rolling bearing model." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 217, no. 3 (2003): 205–12. http://dx.doi.org/10.1243/135065003765714854.

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To increase the rigidity of bearings-shaft systems, the shaft is often supported by a series of double-row rolling bearings. Little work on multiple-row rolling bearings has been published. A comprehensive model is proposed which permits the determination of the internal interactions. The total elastic deflection between bearing rings is described using a vector-and-matrix method. A variety of double-row rolling bearing types are analysed, such as tapered roller bearing, cylindrical roller bearing, spherical roller bearing, self-aligning ball bearings and angular contact ball bearing. The basi

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3

Wojnar, Grzegorz, and Michał Juzek. "The Impact of Non-Parallelism of Toothed Gear Shafts Axes and Method of Gear Fixing on Gearbox Components Vibrations." Acta Mechanica et Automatica 12, no. 2 (2018): 165–71. http://dx.doi.org/10.2478/ama-2018-0026.

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Abstract The subject of the experimental research was a modified back-to-back test stand. During the test, the driven gear with a number of teeth z1=16 was fixed on stationary axis. The tested gearbox worked without load and the closing gearbox was dismantled to avoid any additional vibration and noise. A mechanical system was also used which, during the tests, allowed to change the position of the above mentioned stationary axis. Gear with number of teeth z1 was fixed on a stationary axis with the arrangement of two self-aligning ball bear-ings which prevented significant changes in the angul

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4

Vartha, Venkateswarlu, M. S. Arun Kumar, Saxon Mathew, et al. "Failure Analysis of Ball-Bearing of Turbo-Pump Used in Liquid Rocket Engine." Materials Science Forum 830-831 (September 2015): 709–12. http://dx.doi.org/10.4028/www.scientific.net/msf.830-831.709.

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Rolling contact bearings often referred as antifriction bearings are found in many applications where rotating components are involved. Extreme operating conditions, counterfeit or inferior quality bearings, inadequate lubrication, etc often lead to bearing failures. Each rolling contact bearing failure leaves traces of evidences on what caused its failure. Failure analysis of one such bearing is the subject of this paper.One of the engine ground tests was aborted due to the failure of a self-aligning deep groove ball bearing used in turbo-pump of a liquid rocket engine. Series of engine groun

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5

Kushal, Goyal*1 &. Pratesh Jayaswal2. "FAULT ANALYSIS IN SELF ALIGNING BALL BEARING BY WAVELET TRANSFORM BASED FEATURE EXTRACTION USING NEURAL NETWORKS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 7 (2017): 536–49. https://doi.org/10.5281/zenodo.829767.

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The objective of the present work is to classify different individual defects in case of self aligning ball bearing by using statistical tools coupled with a machine learning technique. The analysis of the generated results is then made and a better understanding of theoretical observations has been put in. To study fault in the bearing, vibration analysis procedure has been undertaken. In the present study, inner race and rough surface defects have been considered. The useful features of the vibration signal have been extracted by using Wavelet Transform which are then used as input to Neural

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6

Parmar, Vivek, VH Saran, and SP Harsha. "Nonlinear vibration response analysis of a double-row self-aligning ball bearing due to surface imperfections." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 234, no. 3 (2020): 514–35. http://dx.doi.org/10.1177/1464419320924918.

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This work attempts to study the vibration response of a double-row self-aligning ball bearing due to surface and localized imperfections. For the contact deformation at the ball–race interactions, the Hertzian load–deflection relation is used for the evaluation of time-varying contact stiffness. The elastohydrodynamic theory is applied to find out the central film thickness. For both the inner and outer race waviness cases, the system response is observed as periodic (with vibrations of high amplitude) at [Formula: see text], i.e. multiples of Nb and its vicinity, but gradually turns to quasi-

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7

Parmar, Vivek, V. Huzur Saran, and S. P. Harsha. "Effect of an unbalanced rotor on dynamic characteristics of double-row self-aligning ball bearing." European Journal of Mechanics - A/Solids 82 (July 2020): 104006. http://dx.doi.org/10.1016/j.euromechsol.2020.104006.

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8

Ambrożkiewicz, Bartłomiej, Arkadiusz Syta, Anthimos Georgiadis, Alexander Gassner, Grzegorz Litak, and Nicolas Meier. "Intelligent Diagnostics of Radial Internal Clearance in Ball Bearings with Machine Learning Methods." Sensors 23, no. 13 (2023): 5875. http://dx.doi.org/10.3390/s23135875.

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This article classifies the dynamic response of rolling bearings in terms of radial internal clearance values. The value of the radial internal clearance in rolling-element bearings cannot be described in a deterministic manner, which shows the challenge of its detection through the analysis of the bearing’s dynamics. In this article, we show the original approach to its intelligent detection through the analysis of short-time intervals and the calculation of chosen indicators, which can be assigned to the specific clearance class. The tests were carried out on a set of 10 brand new bearings o

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9

Xing, Yu, Yifei Zhang, Yin Zhang, Daoyun Qiao, Yuxia Pei, and Yuan Xiao. "Dynamic Service Mechanism of Double-Row Spherical Roller Bearings Due to Self-Aligning Behavior." Machines 11, no. 3 (2023): 400. http://dx.doi.org/10.3390/machines11030400.

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Spherical roller bearings (SRBs) are widely used under self-aligning operating conditions, such as rotor bending or an angular misalignment between inner and outer rings due to their self-aligning function. However, the characterization of SRBs’ self-aligning function is often ignored in the present models. The reason for this is that the self-aligning condition is essentially a fault condition, and many scholars have assumed SRBs are in an ideal operating condition. Although there is nothing wrong with this analysis theoretically, it is incapable of characterizing SRBs’ service behavior compr

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10

Ambrożkiewicz, Bartłomiej, Arkadiusz Syta, Anthimos Georgiadis, Alexander Gassner, and Nicolas Meier. "Experimental Verification of the Impact of Radial Internal Clearance on a Bearing’s Dynamics." Sensors 22, no. 17 (2022): 6366. http://dx.doi.org/10.3390/s22176366.

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This paper focuses on the influence of radial internal clearance on the dynamics of a rolling-element bearing. In the beginning, the 2—Degree of Freedom (DOF) model was studied, in which the clearance was treated as a bifurcation parameter. The derived nonlinear mathematical model is based on Hertzian contact theory and takes into consideration shape errors of rolling surfaces and eccentricity reflecting real operating conditions. The analysis showed characteristic dynamical behavior by specific clearance range, which reflects others in a low or high amplitude and can refer to the optimal clea

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11

Ambrożkiewicz, Bartłomiej, Arkadiusz Syta, Alexander Gassner, Anthimos Georgiadis, Grzegorz Litak, and Nicolas Meier. "The influence of the radial internal clearance on the dynamic response of self-aligning ball bearings." Mechanical Systems and Signal Processing 171 (May 2022): 108954. http://dx.doi.org/10.1016/j.ymssp.2022.108954.

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12

Zhuo, Yaobin, Xiaojun Zhou, and Chenlong Yang. "Dynamic analysis of double-row self-aligning ball bearings due to applied loads, internal clearance, surface waviness and number of balls." Journal of Sound and Vibration 333, no. 23 (2014): 6170–89. http://dx.doi.org/10.1016/j.jsv.2014.04.054.

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13

Bilhan, Hakan, Onur Geckili, Tonguc Sulun, and Tayfun Bilgin. "A Quality-of-Life Comparison Between Self-Aligning and Ball Attachment Systems for 2-Implant–Retained Mandibular Overdentures." Journal of Oral Implantology 37, sp1 (2011): 167–73. http://dx.doi.org/10.1563/aaid-joi-d-10-00070.

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The aim of this study was to evaluate the self-aligning overdenture attachment system by comparing its oral health–related quality of life (OHRQL) with a traditionally used ball attachment system. In this randomized, within-subject crossover trial, 25 edentulous subjects each received 2 mandibular implants, and were then assigned to receive either self-aligning or traditional ball attachments. After 3 months, all subjects were switched to the second attachment type. The OHRQL was evaluated for both of the treatments using the short form of the Oral Health Impact Profile (OHIP-14). A subanalysi

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14

Tian, Junxing, Yuhou Wu, Jian Sun, et al. "Thermal Dynamic Exploration of Full-Ceramic Ball Bearings under the Self-Lubrication Condition." Lubricants 10, no. 9 (2022): 213. http://dx.doi.org/10.3390/lubricants10090213.

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A silicon nitride ceramic bearing has good self-lubricating characteristics. It still has a good operational status under the condition of a lack of oil. However, the temperature distribution of a silicon nitride ceramic bearing during its operation is unclear. To clarify the thermal distribution of a full-ceramic ball silicon nitride ceramic bearing under self-lubricating conditions, the changing trend of the rolling friction temperature between the rolling elements and channels with different accuracies is analyzed using the friction testing machine. The bearing heat generation model based o

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15

Yang, Hang, Zheng Wei Zhang, Xin Fang Zhang, Xue Feng Liu, and Gang Peng. "Investigation on Driving Force of Ball Bearing Motor." Applied Mechanics and Materials 778 (July 2015): 199–204. http://dx.doi.org/10.4028/www.scientific.net/amm.778.199.

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To study ball bearing motor working principle, an ingenious experiment was self-designed, which results indicated that the nature for driving torque of the ball bearing motor was thermal expansion rather than electromagnetic force as generally considered. Furthermore, the threshold current and cutoff temperature for the ball bearing motor were found in our experiment.

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16

Vinogradov, B. V., D. O. Fedin, V. I. Samusia, and D. L. Kolosov. "Dynamic loads in self-aligning gear transmissions of heavy loaded machines." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 1 (2021): 84–90. http://dx.doi.org/10.33271/nvngu/2021-1/084.

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Purpose. Development of a mathematical model of a heavy loaded gear transmission with a self-aligning drive gear; evaluation of the dynamic load on the gear transmission in the gear alignment process. Methodology. The calculation schematic and equations of the relative motion of the self-aligning drive gear are formed using the methods of rigid body dynamics. Analytical expressions for the gear self-alignment time, collision velocity during the alignment and dynamic load factor are obtained by integrating an ordinary differential equation. Methods of the linear theory for oscillations are used

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17

Oguma, Tadashi, Naritoshi Nakagawa, Makoto Mikami, Long Thantrong, Yasumi Kizaki, and Fumio Takimoto. "Water Lubricated Guide Bearing with Self-aligning Segments." International Journal of Fluid Machinery and Systems 6, no. 2 (2013): 49–55. http://dx.doi.org/10.5293/ijfms.2013.6.2.049.

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18

Gu, Le, Guo Jian Cao, Li Qin Wang, and Xin Xin Ma. "Synthesis and Characterization of a Self-Lubricating Film on Bearing Balls." Advanced Materials Research 154-155 (October 2010): 367–70. http://dx.doi.org/10.4028/www.scientific.net/amr.154-155.367.

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In this work, the feasibility of using planetary ball milling for coating bearing balls with a self-lubricating film was investigated. Bearing balls with appropriate amount of MoS2 powder were put into vacuumed stainless steel vials and ball milled. With proceeding of ball milling, thickness of the self-lubricating film increased at first and then decreased. X-ray diffraction (XRD) and X-ray photoelectron spectrum (XPS) results revealed that the surface of the self-lubricating film was MoS2 and the inner region was a mixture of iron molybdenum alloys (Fe3Mo, FexMoy), MoS2 and FeS. Friction coe

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19

Huang, Run Qing, Li Feng Xi, C. Richard Liu, and Jay Lee. "Prognostics for Ball Bearing Based on Neural Networks and Morlet Wavelet." Materials Science Forum 505-507 (January 2006): 1153–58. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.1153.

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This paper deals with a new scheme for prognostics of ball bearing based on Self-Organizing Map (SOM), back propagation neural-network and complex Morlet Wavelet methods. It uses complex Morlet wavelet-based envelope to extract successfully the characteristic frequencies of ball bearing. Then the minimum quantization error (MQE) indicator deriving from SOM is used for performance degradation assessment. Based on Weight Application to Failure Times (WAFT) technology, which deriving from back propagation neural networks, a prognostics model of ball bearing is developed successfully. And the expe

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20

Han, Qinkai, Zhuang Ding, Zhaoye Qin, Tianyang Wang, Xueping Xu, and Fulei Chu. "A triboelectric rolling ball bearing with self-powering and self-sensing capabilities." Nano Energy 67 (January 2020): 104277. http://dx.doi.org/10.1016/j.nanoen.2019.104277.

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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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22

Li, Chang, and Zhi Li Sun. "The Reliability Virtual Experiment Based on Deep Groove Ball Bearing." Advanced Materials Research 44-46 (June 2008): 893–900. http://dx.doi.org/10.4028/www.scientific.net/amr.44-46.893.

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With the application of explicit dynamics and probability finite element method, reliability virtual experiment of deep groove ball bearing is carried out. Based on self –adaptive mesh module of the ANSYS/LS-DYNA, true numerical simulation of the working process is presented after the three-dimensional finite element bearing model is built. Then, the contact stress and strain among balls, retainer and inner (outer) race and also the pressure law during the contact process are obtained. As the randomness of manufacture and assemblage tolerance is inevitable, Monte Carlo method is adopted when s

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23

Yumin, SHANO, and Kikuo NEZU. "Detection of Self-Aligning Roller Bearing Fault by Asynchronous Adaptive Noise Cancelling Technology." JSME International Journal Series C 42, no. 1 (1999): 33–43. http://dx.doi.org/10.1299/jsmec.42.33.

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Kim, Taeyun, and Jangbom Chai. "Pre-Processing Method to Improve Cross-Domain Fault Diagnosis for Bearing." Sensors 21, no. 15 (2021): 4970. http://dx.doi.org/10.3390/s21154970.

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Models trained with one system fail to identify other systems accurately because of domain shifts. To perform domain adaptation, numerous studies have been conducted in many fields and have successfully aligned different domains into one domain. The domain shift problem is caused by the difference of distributions between two domains, which is solved by reducing this difference. Source domain data are labeled and used for training the models to extract the features while the target domain data are unlabeled or partially labeled and only used for aligning. Bearings play important roles in rotat

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Koike, Hitonobu, Toshihiko Matsumura, Koshiro Mizobe, Yuji Kashima, and Katsuyuki Kida. "Evaluation of Tribological Thermal Failure on PEEK-PTFE Hybrid Alumina Ball Bearings." Materials Science Forum 878 (November 2016): 142–47. http://dx.doi.org/10.4028/www.scientific.net/msf.878.142.

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In this paper, the thermal failure (seizure or melting) of hybrid radial bearing (PEEK ring-PTFE composite retainer and alumina ball) under rolling contact fatigue test was investigated. For effective operation of equipment in various environments such as dirty, harmful or corrosion situations, the radial PEEK-PTFE hybrid bearings were produced by machining. The PEEK accumulation layer containing carbon graphite was formed on the raceway of bearing's inner ring at 1200-1500 rpm rotation speed. Due to the self-lubrication of the PEEK composite accumulation layer as solid lubricant, the operatio

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Liu, Jun, Huaxi Zhou, Xiaoyi Wang, and Changguang Zhou. "Investigation of the Contact Characteristics of a Single-Nut Ball Screw Considering Geometric Errors." Lubricants 13, no. 2 (2025): 57. https://doi.org/10.3390/lubricants13020057.

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As the critical performance index of ball screws, the contact characteristics have a significant influence on the lubricant properties, tribological properties, and wear properties of ball screws, which further directly affect the service life of ball screws. The non-uniform load distribution induced by geometric errors results in imbalances among balls along the nut, negatively impacting the service life of ball screws. This study focuses on the load distribution of single-nut ball screws under low-speed working conditions. This paper proposes a self-adjustable model of load distribution that

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Yau, Her-Terng, Shang-Yi Wu, Chieh-Li Chen, and Yu-Chung Li. "Fractional-Order Chaotic Self-Synchronization-Based Tracking Faults Diagnosis of Ball Bearing Systems." IEEE Transactions on Industrial Electronics 63, no. 6 (2016): 3824–33. http://dx.doi.org/10.1109/tie.2016.2522941.

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Blanch, Rodney J., Alex J. Sleeman, Timothy J. White, Alan P. Arnold, and Anthony I. Day. "Cucurbit[7]uril ando-Carborane Self-Assemble to Form a Molecular Ball Bearing." Nano Letters 2, no. 2 (2002): 147–49. http://dx.doi.org/10.1021/nl015655s.

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Shen, Hao, Yufan Lv, Yun Kong, et al. "Triboelectric Nanogenerator-Embedded Intelligent Self-Aligning Roller Bearing with the Capability of Self-Sensing, Monitoring, and Fault Diagnosis." Sensors 24, no. 23 (2024): 7618. http://dx.doi.org/10.3390/s24237618.

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Monitoring the dynamic behaviors of self-aligning roller bearings (SABs) is vital to guarantee the stability of various mechanical systems. This study presents a novel self-powered, intelligent, and self-aligning roller bearing (I-SAB) with which to monitor rotational speeds and bias angles; it also has an application in fault diagnosis. The designed I-SAB is compactly embedded with a novel sweep-type triboelectric nanogenerator (TENG). The TENG is realized within the proposed I-SAB using a comb–finger electrode pair and a flannelette triboelectric layer. A floating, sweeping, and freestanding

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Scholvin, Jörg, Anthony Zorzos, Justin Kinney, et al. "Scalable, Modular Three-Dimensional Silicon Microelectrode Assembly via Electroless Plating." Micromachines 9, no. 9 (2018): 436. http://dx.doi.org/10.3390/mi9090436.

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We devised a scalable, modular strategy for microfabricated 3-D neural probe synthesis. We constructed a 3-D probe out of individual 2-D components (arrays of shanks bearing close-packed electrodes) using mechanical self-locking and self-aligning techniques, followed by electroless nickel plating to establish electrical contact between the individual parts. We detail the fabrication and assembly process and demonstrate different 3-D probe designs bearing thousands of electrode sites. We find typical self-alignment accuracy between shanks of <0.2° and demonstrate orthogonal electrical connec

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Truman, Christopher E., Jonathan J. Blake, and Anthony Sackfield. "Analysis of a Self-Tracking Rolling Element Bearing." Journal of Tribology 123, no. 2 (2000): 243–47. http://dx.doi.org/10.1115/1.1308007.

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A novel rolling bearing design, which is patented, is first described and second analyzed with a view to optimizing the bearing parameters. Usually the sides of grooves or ribs guide the rolling elements in ball and roller bearings. By using element-raceway profiles, which are essentially concave–convex, forces can be generated in the two contact regions which: (1) provide positive skew, (2) give stability to the roller motion in response to a disturbing force, and (3) balance lateral traction forces, thus alleviating the need for grooves or ribs. This allows for potential advantages of: (a) u

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Kostek, Robert. "Simulation and Analysis of Vibration of Rolling Bearing." Key Engineering Materials 588 (October 2013): 257–65. http://dx.doi.org/10.4028/www.scientific.net/kem.588.257.

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This article presents a non-linear model of deep groove ball bearing and results of simulation. Vibrations of this bearing are studied for a wide range of clearance. An evolution from periodic to chaotic vibrations is visible due to increase of clearance. A number of phenomena associated with non-linear dynamics are observed, for instance: bistability, chaotic vibrations, windows of periodical vibrations, jump of amplitude, period-doubling cascade leading to chaos, bifurcation directly leading to chaos, and self-similarity of a Poincaré section. Moreover, amplitudes of vibrations are presente

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Koike, Hitonobu, Koshiro Mizobe, Shunsuke Oyama, Yuji Kashima, Kenji Kanemasu, and Katsuyuki Kida. "Observation of Wear on PEEK-PTFE Hybrid Radial Bearings." Advanced Materials Research 683 (April 2013): 385–90. http://dx.doi.org/10.4028/www.scientific.net/amr.683.385.

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In this paper, the wear performance of hybrid radial bearing (PEEK-PTFE and alumina ball) was investigated. For effective operation of equipment in clean energy facilities environment, the PEEK-PTFE hybrid bearings was developed. Radial PEEK-PTFE hybrid bearings were produced by machining and their rolling contact fatigue (RCF) behavior under non-lubricated condition was carried out. PEEK accumulation layer with PTFE and graphite appeared on the bearing's inner ring under 600-3000 rpm rotation speed. Due to the self-lubrication of PEEK layer, the wear loss of hybrid bearing cycles was lower th

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Koike, Hitonobu, Koshiro Mizobe, Shunsuke Oyama, Yuji Kashima, Kenji Kanemasu, and Katsuyuki Kida. "Comparison of Wear on PEEK-PTFE and PPS-PTFE Radial Bearings under Rolling Contact Fatigue." Applied Mechanics and Materials 372 (August 2013): 503–6. http://dx.doi.org/10.4028/www.scientific.net/amm.372.503.

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In this paper, the wear performance of polymer radial ball bearings (PEEK-PTFE and PPS-PTFE) were investigated. For effective operation of equipment in clean energy facilities environment, the polymer bearings were developed. These polymer bearings were produced by machining and their rolling contact fatigue (RCF) behavior under non-lubricated condition was carried out. PEEK accumulation layer with PTFE and graphite was formed on the bearing's inner ring under 3000 rpm high rotation speed. Due to the self-lubrication of PEEK layer, the wear loss of PEEK-PTFE bearing was lower than PPS-PTFE rad

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Mutoh, Y., K. Tanaka, and M. Uenohara. "Retainer-Dependent Wear of Silicon Nitride Bearings at High Temperatures." Journal of Tribology 116, no. 3 (1994): 463–69. http://dx.doi.org/10.1115/1.2928866.

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Several retainer materials for high-temperature silicon nitride bearings to be used in air were examined with a high-temperature rolling three-ball tester. The “soft” or “self-lubricating” retainer materials (metal-bonded MoS2-WS2 alloys, a carbon-carbon composite and graphite) tended to yield longer bearing life, lower silicon nitride wear rate and lower traction coefficients than the hard retainers (Fe-based sintered alloys, chromia and silicon nitride). The main problem in the use of the self-lubricating retainer materials was their rapid wear by tribo-oxidation at high temperatures.

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Umeda, Junko, Takanori Mimoto, Katsuyoshi Kondoh, and Bunshi Fugetsu. "Tribological Properties of Titanium Plate Coated with Carbon Nanotubes." Key Engineering Materials 545 (March 2013): 158–62. http://dx.doi.org/10.4028/www.scientific.net/kem.545.158.

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This study investigated the tribological property and wear behavior of pure titanium (Ti) plate coated with un-bundled multi-walled carbon nanotubes (MWCNTs). The network-structured MWCNT films were formed on Ti substrate, and their tribological properties were examined by the ball-on-disk wear test equipment under dry sliding condition. SUS304 stainless steel ball was used as a counterpart material in this test. The mean friction coefficient of the Ti plate coated with MWCNTs was remarkably lower and stable compared to the as-received pure Ti plate without any coating films. SEM-EDS analysis

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Chen, C. M., H. L. Chang, C. Y. Chien, and W. H. Lin. "Characterization of influence of high spindle speeds on self-lubricating bearing system." Journal of Physics: Conference Series 2878, no. 1 (2024): 012007. http://dx.doi.org/10.1088/1742-6596/2878/1/012007.

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Abstract This paper studies the influence of bearing speed under a self-lubricating system. In the early 20th century, specialized precision manufacturing companies were founded, further establishing ball bearings as a very valuable, high-quality, and easily accessible mechanical component. This study used a self-lubricating system to achieve constant temperature and precision control. The spindle speed was analysed and tested at three speeds under a fixed pre-loading of 13000 N and a fixed lubricating oil viscosity index of 15. The results showed the spindle speed increases, the heat generate

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Colas, Guillaume, Aurélien Saulot, Yann Michel, Tobin Filleter, and Andreas Merstallinger. "Experimental Analysis of Friction and Wear of Self-Lubricating Composites Used for Dry Lubrication of Ball Bearing for Space Applications." Lubricants 9, no. 4 (2021): 38. http://dx.doi.org/10.3390/lubricants9040038.

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Lubricating space mechanisms are a challenge. Lubrication must be sustained in different environments, for a very long period of time, and without any maintenance possible. This study focuses on the self-lubricating composite used in the double transfer lubrication of ball bearing. Ball/races contacts are lubricated via the transfer of materials from the cage that is made of the composite. A dedicated tribometer has been designed for the study. A specificity of the tribometer is to not fully constrain the composite sample but to let it move, as the cage would do in the bearing. Four composites

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Mirić, Spasoje, Johann W. Kolar, and Dominik Bortis. "Novel tubular linear actuator with integrated magnetic bearing." e & i Elektrotechnik und Informationstechnik 139, no. 2 (2022): 230–42. http://dx.doi.org/10.1007/s00502-022-01013-4.

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AbstractLinear actuators (LAs) are used for applications that require repetitive linear motion, such as linear pumps and compressors, servo drives in industrial automation, and pick-and-place robots in the pharmaceutical and semiconductor industry. These LAs usually have mechanical ball or slide bearings, which require frequent maintenance due to signs of wear limiting the LAs’ usage in high-purity and high-precision processes of the latter applications.Therefore, this paper analyzes a novel LA with integrated magnetic bearings (MBs). It shows how the basic structure of the tubular LA is deriv

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Sun, Jian Rong, Chang Sheng Li, Hua Tang, Jin Yinzi Liu, and Zhi Cheng Guo. "Tribological Properties of Ni-Cr-W Matrix High Temperature Self-Lubrication Composites Sintered by Hot Isostatic Pressing." Advanced Materials Research 619 (December 2012): 531–35. http://dx.doi.org/10.4028/www.scientific.net/amr.619.531.

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The high temperature self-lubrication Ni-Cr-W matrix composites were prepared by powder metallurgy and sintered by hot isostatic pressing (HIP). Atomized Ni-Cr-W powder was mixed with friction components of MoS2and Graphite. The mixed powders were cold pressed 450MPa and sintered at 1100°C~1200°C in the presence of argon atmosphere for 1 hour under 180MPa hot isostatic pressing with respect to their application in slide bearing bushing. The tribological properties are investigated on UMT-2 tester in ball-on-disc against alloy steel ball. The results showed that the appropriate addition of MoS2

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Ren, Fang, Sha Wang, Mingming Yu, et al. "Influence of Graphite/Graphene on the Tribological Behaviors of Self-Lubricating Fabric Composite." Materials 13, no. 1 (2020): 232. http://dx.doi.org/10.3390/ma13010232.

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Graphite/graphene particles were employed as functional fillers to modify hybrid polytetrafluoroethylene/polyisophthaloyl metaphenylene diamine (PTFE/Nomex) fabric-reinforced phenolic composites. The tribology behavior was investigated using a ball-on-disk wear tester, together with a 3D digital microscope. The graphite/graphene exhibits the synergetic effect from the results, which not only reduces the friction efficient but also improves the wear resistance of the composites. Moreover, the wear mechanisms were studied by the wear surface microstructure analysis. It is proposed that the syner

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Wang, Yan Shuang, Zhe Liu, and Hai Feng Zhu. "Heat Generation of Bearing." Key Engineering Materials 480-481 (June 2011): 962–67. http://dx.doi.org/10.4028/www.scientific.net/kem.480-481.962.

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Heat generation of a bearing was studied based in this paper. Computational models of power loss were built. The total heat generation was gotten. Influences on total heating were analyzed at various inner ring rolling velocities and applied loads. The results show that bearing rolling velocity and axial load affect heat generation strongly. Meanwhile sliding friction, which exists between balls and the cage pocket, cages and the surface of outer ring, is the main factors of bearing heating. Bearings with shaft are mainly used in gyro motors of aviation, aerospace, marine navigational systems,

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Saidi, Lotfi, Eric Bechhofer, and Mohamed Benbouzid. "Relationship Analysis Between Helicopter Gearbox Bearing Condition Indicators and Oil Temperature Through Dynamic ARDL and Wavelet Coherence Techniques." Machines 13, no. 8 (2025): 645. https://doi.org/10.3390/machines13080645.

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This study investigates the dynamic relationship between bearing gearbox condition indicators (BGCIs) and the lubrication oil temperature within the framework of health and usage monitoring system (HUMS) applications. Using the dynamic autoregressive distributed lag (DARDL) simulation model, we quantified both the short- and long-term responses of condition indicators to shocks in oil temperature, offering a robust framework for a counterfactual analysis. To complement the time-domain perspective, we applied a wavelet coherence analysis (WCA) to explore time–frequency co-movements and phase re

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Tiwari, Prashant, and SH Upadhyay. "Degradation assessment of ball bearings utilizing curvilinear component analysis." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 233, no. 3 (2018): 714–30. http://dx.doi.org/10.1177/1464419318817097.

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The performance degradation assessment of ball bearings is of great importance to increase the efficiency and the reliability of rotating mechanical systems. The large dimensionality of feature space introduces a lot of noise and buries the potential information about faults hidden in the feature data. This paper proposes a novel health assessment method facilitated with two compatible methods, namely curvilinear component analysis and self-organizing map network. The novelty lies in the implementation of a vector quantization approach for the sub-manifolds in the feature space and to extract

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Ghalamchi, Behnam, Jussi Sopanen, and Aki Mikkola. "Simple and Versatile Dynamic Model of Spherical Roller Bearing." International Journal of Rotating Machinery 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/567542.

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Rolling element bearings are essential components of rotating machinery. The spherical roller bearing (SRB) is one variant witnessing increasing use because it is self-aligning and can support high loads. It is becoming increasingly important to understand how the SRB responds dynamically under a variety of conditions. This study introduces a computationally efficient, three-degree-of-freedom, SRB model that was developed to predict the transient dynamic behaviors of a rotor-SRB system. In the model, bearing forces and deflections were calculated as a function of contact deformation and bearin

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Yu, Mingming, Min Zhang, Lin Fang, et al. "Wear failure mechanism analysis of self-lubricating fabric composites at high temperature." Journal of Industrial Textiles 52 (August 2022): 152808372211485. http://dx.doi.org/10.1177/15280837221148500.

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The friction and wear properties of self-lubricating fabric composites were closely related to fiber properties. In this paper, polyimide (PI), polyetheretherketone (PEEK), polyisophthalamide (PMIA) and cyclic aramid (Aramid III) fibers were selected as reinforcing fibers to compare and investigate the friction and wear properties of self-lubricating fabric composites at high temperature. The tribological behavior of self-lubricating fabric composites was evaluated by ball-on-disk friction test. The wear mechanism was investigated by scanning electron microscope and mechanical test. As a resul

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Jiang, Fan, Zhencai Zhu, Wei Li, Bo Wu, Zhe Tong, and Mingquan Qiu. "Feature Extraction Strategy with Improved Permutation Entropy and Its Application in Fault Diagnosis of Bearings." Shock and Vibration 2018 (September 4, 2018): 1–12. http://dx.doi.org/10.1155/2018/1063645.

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Feature extraction is one of the most difficult aspects of mechanical fault diagnosis, and it is directly related to the accuracy of bearing fault diagnosis. In this study, improved permutation entropy (IPE) is defined as the feature for bearing fault diagnosis. In this method, ensemble empirical mode decomposition (EEMD), a self-adaptive time-frequency analysis method, is used to process the vibration signals, and a set of intrinsic mode functions (IMFs) can thus be obtained. A feature extraction strategy based on statistical analysis is then presented for IPE, where the so-called optimal num

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Xie, Yifan, Chang Liu, Liji Huang, and Hongchun Duan. "Ball Screw Fault Diagnosis Based on Wavelet Convolution Transfer Learning." Sensors 22, no. 16 (2022): 6270. http://dx.doi.org/10.3390/s22166270.

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The ball screw is the core component of the CNC machine tool feed system, and its health plays an important role in the feed system and even in the entire CNC machine tool. This paper studies the fault diagnosis and health assessment of ball screws. Aiming at the problem that the ball screw signal is weak and susceptible to interference, using a wavelet convolution structure to improve the network can improve the mining ability of signal time domain and frequency domain features; aiming at the challenge of ball screw sensor installation position limitation, a transfer learning method is propos

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Zhou, Hui, Jun Zheng, Ji Xing Hu, Rui Peng Sang, and Zhi Hua Wan. "Study of MoS₂-Ti Composite Coatings Applied in Precision Ball Bearings." Advanced Materials Research 538-541 (June 2012): 281–85. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.281.

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708C Ball bearings were made of 9Cr18 steel which had precision of class 4, MoS2-Ti composite coatings were deposited on inner and outer races of ball bearings by unbalanced magnetron sputtering system, and bearing cages were made of PTFE-based self-lubricating polymers. Bearing’s tribological torques as a function of storage time in high humidity environment were studied by using LHU-2 thermal & humidity test chamber and Bearing 2000 torque measurement device. Developing bearing vacuum performance test rig to research bearing’s torque as a function of running time, bearings were dismantle

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Mehta, Ankush, Deepam Goyal, Anurag Choudhary, B. S. Pabla, and Safya Belghith. "Machine Learning-Based Fault Diagnosis of Self-Aligning Bearings for Rotating Machinery Using Infrared Thermography." Mathematical Problems in Engineering 2021 (April 15, 2021): 1–15. http://dx.doi.org/10.1155/2021/9947300.

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Bearings are considered as indispensable and critical components of mechanical equipment, which support the basic forces and dynamic loads. Across different condition monitoring (CM) techniques, infrared thermography (IRT) has gained the limelight due to its noncontact nature, high accuracy, and reliability. This article presents the use of IRT for the bearing fault diagnosis. A two-dimensional discrete wavelet transform (2D-DWT) has been applied for the decomposition of the thermal image. Principal component analysis (PCA) has been used for the reduction of dimensionality of extracted feature

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