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Journal articles on the topic 'Block bearings'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Wei, Li Dui, Shu Lin Duan, Qi Li Wu, Ji Wu, and Wei Guo. "Lubrication Simulation of Main Bearing about a Marine Diesel Engine Based on Multi-Body Dynamics and Elastohydrodynamic." Advanced Materials Research 347-353 (October 2011): 2679–83. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.2679.

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The purpose of this paper is to find a method to study the lubrication character of the main bearings and load condition of the crankshaft about the marine two-stroke diesel engine. Based on the finite element method, multi-body dynamics, elastohydrodynamic and Green-Tripp theory about contact, the simulation of coupling between the elastic crankshaft and engine block is carried out. The load of main bearings, the minimum of oil film thick, orbital path of journal, average of asperity contact pressure are explored. The results indicate that the lubrication is good except No.2 main bearing. Par

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2

Shadmonhodzhaev, Murodilla, Aleksey Zelenchenko, and Igor' Rolle. "Mathematical Model of Locomotive Wheel-Motor Block for the Conditions of Diagnostics Technological Process for Bearing Units at the Position of Vibroacoustic Control." Proceedings of Petersburg Transport University 19, no. 4 (2022): 832–38. http://dx.doi.org/10.20295/1815-588x-2022-4-832-838.

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Purpose: The conduction of experimental studies in the conditions of locomotive depot, the transition to mathematical modeling of wheel-motor block for the conditions of diagnostics position, not allowing disassembly, of traction electric motor bearings. Methods: Diagnostic complexes allowing to determine wheel-motor block technical state in locomotive depots. In order to determine the approaches for the choice and evaluation of power source parameters for vibroacoustic diagnostics position, not allowing disassembly, of wheel-motor blocks of locomotive depot the analysis of designing methodolo

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3

Leonov, Oleg A. "Instrumental control of defects in the main bearings of the cylinder block." Agricultural Engineering, no. 2 (2024): 65–70. http://dx.doi.org/10.26897/2687-1149-2024-2-65-70.

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When detecting faults in main bearings of the cylinder block, it is important to minimize detection errors that could result in the part being incorrectly accepted or incorrectly rejected. Incorrect rejection of a cylinder block main bearing to the left and right of the tolerance limit will result in the need to replace the cylinder block. Incorrect acceptance of the support according to the smallest size may result in a loose cap-to-support fit and possible breakage. Incorrect acceptance of the support according to the largest size can lead to a gap between the liners and their subsequent pla

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4

Wu, Kepeng, Guangwu Zhou, Xiongwei Mi, Ping Zhong, Wenbo Wang, and Daxin Liao. "Tribological and Vibration Properties of Three Different Polymer Materials for Water-Lubricated Bearings." Materials 13, no. 14 (2020): 3154. http://dx.doi.org/10.3390/ma13143154.

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Water-lubricated bearings usually operate under severe environmental conditions, most likely in the mixed regime, in which surface contact between the drive shaft and the bearing sleeve is often significant. This presents great challenges to bearing design, especially material selection. The Tenmat, Thordon, and Rubber are common water-lubricated bearing composites. In this paper, by using a block-on-ring test apparatus, the Stribeck curve, wear rate, and vibration characteristics of three kinds of polymer materials in water-lubricated bearings (Tenmat, Thordon SXL, and Ben Teng Group (BTG) Ru

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5

Khalil, M. K. Bahr, J. V. Svoboda, and R. B. Bhat. "DYNAMIC LOADS ON THE DRIVE SHAFT BEARINGS OF A SWASH PLATE AXIAL PISTON PUMP WITH CONICAL CYLINDER BLOCK." Transactions of the Canadian Society for Mechanical Engineering 27, no. 4 (2004): 309–18. http://dx.doi.org/10.1139/tcsme-2003-0017.

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Variable displacement swash plate pumps are invariably used under conditions that involve heavy loads with variable flow demands. Swash plate pumps with conical cylinder blocks are now widely used in view of their good static and dynamic characteristics. However, drive shafts of these pumps experience dynamic loads due to the pressure forces transmitted through the body of the conical cylinder block to the supporting bearings. Dynamics of such rotating mechanism are quite interesting and should be considered in the design process of the drive shaft and the supporting bearings. A mathematical m

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6

WOŹNIAK, Marek, Cristina Florena BANICA, Mihai DIACONU, Gustavo OZUNA, Piotr JÓŹWIAK, and Krzysztof SICZEK. "INVESTIGATIONS ON WEAR AND FRICTION IN THE SI ENGINE VALVETRAIN." Mechanical Testing and Diagnosis 10, no. 4 (2021): 12–23. http://dx.doi.org/10.35219/mtd.2020.4.02.

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The engine valvetrain system operating under conditions of insufficient oil lubrication, caused by incorrect installation of the gasket between the block and the head, was tested. The aim of the analysis was to determine the wear intensity and resistance to motion in camshaft bearings. A model was developed that includes a camshaft, bearings, tappet-valve-spring subassemblies and a part of the lubrication system. It was used to determine the bearing loads and the amount of oil supplied. The volumetric wear of the camshaft journals and bearing covers was measured. For the estimated engine run,

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7

WOŹNIAK, Marek, Cristina Florena BANICA, Mihai DIACONU, Gustavo OZUNA, Piotr JÓŹWIAK, and Krzysztof SICZEK. "Investigations on wear and friction in the SI engine valvetrain." Combustion Engines 175, no. 4 (2018): 53–64. http://dx.doi.org/10.19206/ce-2018-408.

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The engine valvetrain system operating under insufficient oil lubrication conditions, caused by an incorrect installation of the gasket between the block and the head, was tested. The aim of the analysis was to determine the wear intensity and resistance to motion in camshaft bearings. A model including a camshaft, bearings, tappet-valve-spring subassemblies and a part of the lubrication system was developed. It was used to determine the bearing loads and the amount of oil supplied. The volumetric wear of the camshaft journals and bearing covers was measured. For the estimated engine run, the

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8

Khim, Gyungho, Chun Hong Park, and Jeong Seok Oh. "A Method of Calculating Motion Error in a Linear Motion Bearing Stage." Scientific World Journal 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/696417.

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We report a method of calculating the motion error of a linear motion bearing stage. The transfer function method, which exploits reaction forces of individual bearings, is effective for estimating motion errors; however, it requires the rail-form errors. This is not suitable for a linear motion bearing stage because obtaining the rail-form errors is not straightforward. In the method described here, we use the straightness errors of a bearing block to calculate the reaction forces on the bearing block. The reaction forces were compared with those of the transfer function method. Parallelism e

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9

Ma, Zhihao, Gai Liu, Yichen Liu, Zhaocheng Yang, and Huangqiu Zhu. "Research of a Six-Pole Active Magnetic Bearing System Based on a Fuzzy Active Controller." Electronics 11, no. 11 (2022): 1723. http://dx.doi.org/10.3390/electronics11111723.

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Magnetic bearings have a series of excellent qualities, such as no friction and abrasions, high speed, high accuracy, and so on, which have fundamentally innovated traditional forms of support. In order to solve the problems of the large volume, low power density and high coupling coefficient of three-pole magnetic bearings, a six-pole AC active magnetic bearing is designed. Firstly, the basic structure and working principle of a two-degree-of-freedom (2-DOF) six-pole active magnetic bearing is introduced. Secondly, a suspension force modeling method of a 2-DOF AC active magnetic bearing based

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10

Stoica, R. M., D. Voicu, R. Vilau, L. Barothi, and L. Deleanu. "Bearings fault detection by means of frequency analysis." IOP Conference Series: Materials Science and Engineering 1220, no. 1 (2022): 012032. http://dx.doi.org/10.1088/1757-899x/1220/1/012032.

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Abstract The present paper aims to analyse the possibility to prevent machine failure due to bearing faults, with the use of frequency analysis. The experimental research consisted in mounting a simple mechanical transmission, integrating an electric motor, a rigid coupling, a driven shaft, two pillow block bearings and a uniaxial accelerometer (connected to a data acquisition board), which was tested at two constant motor speeds. Follow-up, with the use of recorded data, it was plotted the envelope spectrum of bearing functioning, based on BPFO, BPFI, FTF and BSF harmonics, which were later u

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11

Wei, Lidui, Haijun Wei, Shulin Duan, and Yu Zhang. "An EHD-mixed lubrication analysis of main bearings for diesel engine based on coupling between flexible whole engine block and crankshaft." Industrial Lubrication and Tribology 67, no. 2 (2015): 150–58. http://dx.doi.org/10.1108/ilt-08-2013-0088.

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Purpose – The purpose of this paper is to develop a good calculation model to accurately predict the lubrication characteristic of main bearings of diesel engine and improve the service life. Design/methodology/approach – Based on the coupling of the whole flexible engine block and the flexible crankshaft reduced by the Component Mode Synthesis (CMS) method, considering mass-conserving boundary conditions, the average flow model equation and Greenwood/Tripp asperity contact theory, an elastohydrodynamic (EHD)-mixed lubrication model of the main bearings for the diesel engine is developed and r

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12

Fu, Yueshuai, Huimin Fu, and Qiong Wu. "A Reliable Life Consumption Assessment and Individual Life Monitoring Method for Rolling Bearings." Machines 11, no. 7 (2023): 742. http://dx.doi.org/10.3390/machines11070742.

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Rolling bearings are critical rotating components in aerospace and high-speed trains. The service loads of rolling bearings are generally different from each other, causing significant differences in their damage degrees and reliable life potential. To ensure bearing reliability during service, a reliable life consumption assessment and individual life monitoring method is proposed. Firstly, a small-sample reliable life evaluation method is established based on an accelerated life test conducted at a constant load or load block spectrum before delivery, by which the lower confidence limit of t

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13

Starikov, Alexander V., and Vladislav D. Kostukov. "Analysis of the operation of electromagnetic bearings in the difference of the center of the magnetic system relative to the axis of rotation and variations of the supply voltage." Vestnik of Samara State Technical University. Technical Sciences Series 31, no. 1 (2023): 103–13. http://dx.doi.org/10.14498/tech.2023.1.8.

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The article sets the task of reducing the consumption of electrical energy by electromagnetic bearings. To achieve this goal, it is proposed to shift the center of the magnetic system of bearings that compensate for the weight of the rotor relative to the axis of rotation. The displacement value is assumed to be equal to half the clearance value in the safety bearings of the unit under consideration. A mathematical model of a radial electromagnetic bearing, its design scheme, taking into account the displacement of the center of the magnetic system relative to the axis of rotation, a block dia

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14

SYTIN, A. V., N. V. TOKMAKOV, A. V. GORIN, and М. А. TOKMAKOVA. "EVALUATION OF THE TECHNICAL CONDITION OF THE FLAPE BEARING WITH ADJUSTABLE RIGIDITY." Fundamental and Applied Problems of Engineering and Technology 6 (2020): 101–5. http://dx.doi.org/10.33979/2073-7408-2020-344-6-101-105.

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The article considered the assessment of the technical condition of a petal bearing with adjustable stiffness. A schematic diagram of bearing stiffness control is presented. Revealed a constructive solution providing rigidity adjustment. For a qualitative assessment of the technical condition, a petal bearing was modeled in the VATCAD environment. The schematic diagram and block diagram of the control system of the experimental stand for assessing the technical condition of the petal bearing are described. Recommendations are given for the further application of the concept of assessing the te

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15

Ambrożkiewicz, Bartłomiej, Arkadiusz Syta, Nicolas Meier, Grzegorz Litak, and Anthimos Georgiadis. "Radial internal clearance analysis in ball bearings." Eksploatacja i Niezawodnosc - Maintenance and Reliability 23, no. 1 (2021): 42–54. http://dx.doi.org/10.17531/ein.2021.1.5.

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Radial internal clearance (RIC) is one of the most important parameters influencing on rolling bearing exploitation in mechanical systems. Lifetime of rotary machines strongly depends on a condition of applied rolling elements, thus a study on applied clearance is very important in terms of maintenance and reliability. This paper proposes, a novel approach of studying RIC, based on a nonlinear dynamics method called recurrences. The results are confronted with standard analyses, i.e. statistical condition indicators, Fast Fourier Transform and Continuous Wavelet Transform. The application of t

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16

Gypka, A., V. Aulin, O. Lyashuk, A. Hrynkiv, and V. Hud. "The patterns of changes in the degree of lubrication of the crankshaft bearings of car engines depending on the parameters of the load-speed modes of operation." Problems of Tribology 29, no. 3/113 (2024): 72–78. http://dx.doi.org/10.31891/2079-1372-2024-113-3-72-78.

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The practice of operating machines and mechanisms indicates that bearing wear is one of the main reasons for limiting their durability. This especially applies to the sliding bearings of crankshafts of car engines, where the intensity of wear of their working surfaces significantly depends on the properties of the lubricant. An experimental study of the wear resistance of the sliding bearings of the crankshafts of car engines was carried out on the KI-5543 model break-in and braking stand. In experimental studies, BELZONA Super E-Metal insulating material was used to provide electrical isolati

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17

Ebrat, Omidreza, Zissimos P. Mourelatos, Kexin Hu, Nickolas Vlahopoulos, and Kumar Vaidyanathan. "An Elastohydrodynamic Coupling of a Rotating Crankshaft and a Flexible Engine Block." Journal of Tribology 126, no. 2 (2004): 233–41. http://dx.doi.org/10.1115/1.1645297.

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A comprehensive formulation is presented for the dynamics of a rotating flexible crankshaft coupled with the dynamics of an engine block through a finite difference elastohydrodynamic main bearing lubrication algorithm. The coupling is based on detailed equilibrium conditions at the bearings. The component mode synthesis is employed for modeling the crankshaft and block dynamic behavior. A specialized algorithm for coupling the rigid and flexible body dynamics of the crankshaft within the framework of the component mode synthesis has been developed. A finite difference lubrication algorithm is

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18

RODICHEV, A. Yu, N. V. TOKMAKOV, M. A. GRIADUNOVA, and А. O. IVANOV. "CONCEPT OF MECHATRONIC CONICAL ROLLING BEARING." Fundamental and Applied Problems of Engineering and Technology 2 (2021): 146–49. http://dx.doi.org/10.33979/2073-7408-2021-346-2-146-149.

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The article presents the concept of a mechatronic tapered rolling bearing. The results of a brief analysis of the produced mechatronic rolling bearings are given. The structural and functional diagram of a mechatronic tapered rolling bearing is presented. The proposed concept is based on a mechanical system, as well as a monitoring and control system. A constructive solution has been identified that provides clearance adjustment in a tapered rolling bearing. The schematic diagram and block diagram of the control system of a mechatronic tapered rolling bearing are described. Recommendations are

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19

Albdery, Mohsin H., and Istvan Szabo. "Experimental Study of the Effect of Misalignment on Rolling Element Bearing." European Journal of Engineering and Technology Research 6, no. 7 (2021): 87–90. http://dx.doi.org/10.24018/ej-eng.2021.6.7.2661.

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Any single machine rotary component in the process could result in downtime costs. It is necessary to monitor the overall machine health while it is in use. Bearing failure is one of the primary causes of machine breakdown in industry at high and low speeds. A vibration signature evaluation has historically determined misalignments in shafting systems. These misalignments are also responsible for the bearing increase in temperature. The purpose of this work is to undertake a comparative study to obtain the reliability of the effect of the amount of misalignment on bearing by using thermography

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20

Albdery, Mohsin H., and Istvan Szabo. "Experimental Study of the Effect of Misalignment on Rolling Element Bearing." European Journal of Engineering and Technology Research 6, no. 7 (2021): 87–90. http://dx.doi.org/10.24018/ejeng.2021.6.7.2661.

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Any single machine rotary component in the process could result in downtime costs. It is necessary to monitor the overall machine health while it is in use. Bearing failure is one of the primary causes of machine breakdown in industry at high and low speeds. A vibration signature evaluation has historically determined misalignments in shafting systems. These misalignments are also responsible for the bearing increase in temperature. The purpose of this work is to undertake a comparative study to obtain the reliability of the effect of the amount of misalignment on bearing by using thermography

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21

Wang, You Qiang, Xiu Jiang Shi, and Fu E. Ren. "Friction and Wear Mechanism between Rubber and Nickel for Water Lubricated Bearings." Advanced Materials Research 530 (June 2012): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amr.530.91.

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Water lubricated rubber bearing is one of the most appropriate bearings widely used in submerged pump for drainage. The water lubricated rubber bearings sometimes worked in absent-water conditions especially at the machine start or brake. The friction and wear characteristics of the water lubricated rubber/Nickel coating pair were tested under dry, wet and water lubrication conditions respectively on the high-speed ring-block friction and wear testing machine. The effect of load and speed on the friction coefficient was examined in the experiment. The friction and wear mechanism of the rubber/

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22

Chen, Liang, Dongxin Xue, Xigeng Song, Zhaoqi He, and Dongjie Huang. "A Study on Anti-Shock Performance of Marine Diesel Engine Based on Multi-Body Dynamics and Elastohydrodynamic Lubrication." Applied Sciences 11, no. 23 (2021): 11259. http://dx.doi.org/10.3390/app112311259.

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Diesel engine anti-shock performance is important for navy ships. The calculation method is a fast and economic way compared to underwater explosion trial in this field. Researchers of diesel engine anti-shock performance mainly use the spring damping model to simulate the main bearings of a diesel engine. The elastohydrodynamic lubrication method has been continuously used in the main bearings of diesel engines in normal working conditions. This research aims at using the elastohydrodynamic lubrication method in the main bearings of the diesel engine in external shock conditions. The main bea

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23

Shiler, A. V., V. V. Shiler, A. V. Smolyaninov, and K. M. Kolyasov. "Dynamic interaction of a block wheelset and assessment of its impact on the endurance of the bogie components." Herald of the Ural State University of Railway Transport, no. 4 (2022): 39–46. http://dx.doi.org/10.20291/2079-0392-2022-4-39-46.

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A method of comparative assessment of the influence of the features of dynamic interaction in the «block wheel-set - rail track» system on the wear rate of the rolling surfaces of wheels, axle bearings, and the support of the freight car bogie due to new design solutions implemented in the block wheelset is presented. A block wheelset differs from a typical pair in that it has separated the functions of holding and directing movement (ridge) and ensuring the movement of the wheelset in a straight section of the track (straight and winding). In the process of simulation modeling of interaction

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24

Zlenko, Mikhail A., Alexey S. Terenchenko, and Ivan S. Shibaev. "The choice of design parameters of main and conrod bearings for passenger car engines." Izvestiya MGTU MAMI 16, no. 1 (2022): 5–12. http://dx.doi.org/10.17816/2074-0530-106459.

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BACKGROUND: The creation of a new internal combustion engine begins with a preliminary design, during which the architectural design of the engine is born, the main features of its basic components are determined. Bearings (in this case, sliding bearings) are the cornerstones of the design, which create the foundation and form the basis the skeleton of the power train mechanism and, as a result, the image of the future engine. Therefore, the exact selection of these key engine components is an ongoing challenge. AIMS: Тo develop and propose an engineering method for selecting bearing par

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25

Wang, Jun, Zhilin Dong, and Shuang Zhang. "KAN-HyperMP: An Enhanced Fault Diagnosis Model for Rolling Bearings in Noisy Environments." Sensors 24, no. 19 (2024): 6448. http://dx.doi.org/10.3390/s24196448.

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Rolling bearings often produce non-stationary signals that are easily obscured by noise, particularly in high-noise environments, making fault detection a challenging task. To address this challenge, a novel fault diagnosis approach based on the Kolmogorov–Arnold Network-based Hypergraph Message Passing (KAN-HyperMP) model is proposed. The KAN-HyperMP model is composed of three key components: a neighbor feature aggregation block, a feature fusion block, and a KANLinear block. Firstly, the neighbor feature aggregation block leverages hypergraph theory to integrate information from more distant

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26

Yang, Xu, XianGuo Li, DeJun Meng, Jia Shi, and ChangYun Miao. "Optical fiber vibration sensor for bearing fault detection based on Sagnac interferometer." Laser Physics 33, no. 6 (2023): 065101. http://dx.doi.org/10.1088/1555-6611/acca04.

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Abstract Bearings are crucial components in mechanical equipment, and bearing failure is one of the reasons for mechanical equipment safety accidents. In this work, an optical fiber vibration sensor based on Sagnac interferometer (SI) is proposed and applied to bearing fault detection. The polarization-maintaining fiber (PMF) is spliced between two single-mode fibers (SMFs) to form a SMF-PMF-SMF (SPS) fiber structure, which is connected with a 3 dB coupler to form a SI based on SPS fiber structure. The mass block is fixed in the middle of the PMF. When the monitored surface or structure vibrat

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27

Gündoğar, Umut Yusuf, and Sibel Zorlu Partal. "Design, 3D FEM Simulation and Prototyping of a Permanent Magnet Spherical Motor." Actuators 10, no. 11 (2021): 305. http://dx.doi.org/10.3390/act10110305.

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In recent years, large tilt angles, uniform magnetic flux distributions, strong forces, and large torques for motors have increasingly become important for robotics, biomedical, and automotive applications that have multi-degrees of freedom (MDOFs) motion. Generally, one-degree of-freedom motors are applied in MDOF motion. These situations cause the systems to have very complex and large structures. In order to address these issues, a 2-DOF surface permanent magnet spherical motor with a new mechanical design for the movement of the rotor with a large tilt angle of ±45° was designed, simulated

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28

Shiler, Valeriy Viktorovich, Alexander Valeryevich Shiler, Alexander Vasilyevich Smolyaninov, and Konstantin Mikhaylovich Kolyasov. "Influence of peculiarities of block wheelset dynamics on life of axle-box bearings." Transport of the Urals, no. 4 (2022): 33–38. http://dx.doi.org/10.20291/1815-9400-2022-4-33-38.

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Standard (typical) wheelset is a direct connection of an axle and two wheels. Wheels have tread surface that provides rounding a curve and centering (winding movement) on tangent track. The authors propose a new design of a wheelset, in which functions of holding and directing the wheelset (flange) are separated from wheel (support wheel) tread surface. Such a wheelset has a row of advantages in comparison with a typical design. The paper proposes a method for a comparative assessment of life of twin cylindrical axle-box bearings in block and standard designs of wheelsets of freight cars. It i

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29

Liang, Qingchen, Peng Liang, Feng Guo, Shuyi Li, Xiaohan Zhang, and Fulin Jiang. "The Influence of Scratches on the Tribological Performance of Friction Pairs Made of Different Materials under Water-Lubrication Conditions." Lubricants 11, no. 10 (2023): 449. http://dx.doi.org/10.3390/lubricants11100449.

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Water-lubricated bearings are widely used in marine equipment, and the lubricating water often contains hard particles. Once these particles enter the gap between the bearing and the shaft, they can scratch the smooth surfaces of the shaft and bearing, influencing the working performance of the bearing system. To investigate the effect of scratch parameters on tribological performance, this paper conducts multiple block-on-ring experiments and constructs a mixed-lubrication model under water-lubrication conditions. The results show that among the three commonly used bearing materials, the trib

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Cui, Wei, Guoying Meng, Tingxi Gou, Aiming Wang, Rui Xiao, and Xinge Zhang. "Intelligent Rolling Bearing Fault Diagnosis Method Using Symmetrized Dot Pattern Images and CBAM-DRN." Sensors 22, no. 24 (2022): 9954. http://dx.doi.org/10.3390/s22249954.

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Rolling bearings are a vital component of mechanical equipment. It is crucial to implement rolling bearing fault diagnosis research to guarantee the stability of the long-term action of mechanical equipment. Conversion of rolling bearing vibration signals into images for fault diagnosis research has been a practical diagnostic approach. The current paper presents a rolling bearing fault diagnosis method using symmetrized dot pattern (SDP) images and a deep residual network with convolutional block attention module (CBAM-DRN). The rolling bearing vibration signal is first visualized and transfo

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31

Wang, Lun, Xincong Zhou, Qipeng Huang, Xueshen Liu, Zhenjiang Zhou, and Shaopeng Xing. "Investigation into the Synergistic Effects of Sediment Concentration and Particle Size on the Friction and Wear Properties of Nitrile Butadiene Rubber." Journal of Marine Science and Engineering 13, no. 1 (2024): 33. https://doi.org/10.3390/jmse13010033.

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Nitrile Butadiene Rubber (NBR) is commonly used in ships’ water-lubricated tail bearings. However, sediment in the water significantly affects these bearings’ friction and wear performance. This study investigates NBR test blocks’ friction and wear behavior in conjunction with ZCuSn10Zn2 copper ring friction pairs within a sediment-laden water lubrication environment. Two primary factors were considered: sediment particle concentration and sediment particle size. Friction and wear tests were conducted under pure water and sediment-laden conditions using the ZY-1 ring block friction and wear te

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32

Wu, Xiangyang, Haibin Shi, and Haiping Zhu. "Fault Diagnosis for Rolling Bearings Based on Multiscale Feature Fusion Deep Residual Networks." Electronics 12, no. 3 (2023): 768. http://dx.doi.org/10.3390/electronics12030768.

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Deep learning, due to its excellent feature-adaptive capture ability, has been widely utilized in the fault diagnosis field. However, there are two common problems in deep-learning-based fault diagnosis methods: (1) many researchers attempt to deepen the layers of deep learning models for higher diagnostic accuracy, but degradation problems of deep learning models often occur; and (2) the use of multiscale features can easily be ignored, which makes the extracted data features lack diversity. To deal with these problems, a novel multiscale feature fusion deep residual network is proposed in th

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Сиваков, В. П., А. В. Вураско, С. Н. Вихарев, С. Н. Исаков, and К. С. Исаева. "The influence of the location of the rotameter blocks of the circulating lubrication of the bearings of the drying part on the drive power." Известия СПбЛТА, no. 249 (September 1, 2024): 271–84. http://dx.doi.org/10.21266/2079-4304.2024.249.271-284.

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В сушильных частях бумаго- и картоноделателных машин применяют две схемы расположения блоков ротаметров систем циркуляционной смазки подшипников. Компактная схема имеет два блока ротаметров (по одному с лицевой и приводной сторон машины). Распределенная по приводным группам сушильной части схема имеет восемь блоков ротаметров (по два блока на каждую группу по приводу). Схемы расположения блоков ротаметров отличаются разной длиной труб малого диаметра (4-7 мм) подачи масла от ротаметров до подшипников. Влияние длины и диаметра труб подачи масла от ротаметров к подшипникам на мощность привода на

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Kiryukhin, Aleksandr. "Stabilization of vibrations of rotary machines in radial sliding bearings with integrated liquid." MATEC Web of Conferences 224 (2018): 02043. http://dx.doi.org/10.1051/matecconf/201822402043.

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The use of radial bearings with segments on a self-generated hydrostatic suspension has been substantiated in order to satisfy the requirements for precision positioning of axes and efficiency of stabilization of shaft oscillations of power-consuming rotary machines. The methods of turbomachine dynamical analysis based on the modelling of the viscous friction forces process and inertia in lubricating films that balance the harmonic loads on the shaft by redistributing the lubricant flow parameters in the bearing gaps with integrated liquid dampers have been further developed. The complex appro

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Liang, Haopeng. "Rolling Bearing Fault Diagnosis based on Residual Neural Network." Frontiers of Mechatronical Engineering 2, no. 4 (2020): 89. http://dx.doi.org/10.18282/fme.v2i4.1547.

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<div class="Section0"><div>Because rolling bearings have been working in an environment with complex and variable working conditions and large noise interference for a long time, the bearing fault diagnosis method has a poor diagnostic effect under variable working conditions. To solve this problem, we propose a residual neural network based on the diagnosis method of rolling bearing fault. The proposed method takes rolling bearing time-domain signal data as input. Because bearing signals have strong time-varying properties, we construct a multi-scale residual block that can not on

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Babudzhan, Ruslan, Kostiantyn Isaienkov, Danylo Krasii, et al. "Collection and processing of bearing vibration data for their technical condition classification by machine learning methods." Modeling Control and Information Technologies, no. 5 (November 21, 2021): 10–15. http://dx.doi.org/10.31713/mcit.2021.02.

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An experimental research facility has been developed to receive vibration signals from mechanisms with installed rolling bearings. A control block for all equipment has been created. For the repeatability of the experiment, an external microcontroller with a programmed proportional-integral-derivative regulator was used. Experiments were carried out to obtain initial data for different types of bearings. The processed data were grouped and made publicly available for further research. It is proposed to solve the problem of emergency stop of the generator, arising during operation due to

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Tong, Xiaohua, Kuifeng Luan, Xianglei Liu, et al. "Tri-Camera High-Speed Videogrammetry for Three-Dimensional Measurement of Laminated Rubber Bearings Based on the Large-Scale Shaking Table." Remote Sensing 10, no. 12 (2018): 1902. http://dx.doi.org/10.3390/rs10121902.

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Laminated rubber bearings are widely used for the mitigation of seismic damage of large-scale structures and equipment. However, owing to the flexibility in horizontal direction, the traditional contacted transducer is difficult to acquire the displacement data accurately in the three directions, respectively. In this paper, three-dimensional displacement measurement of laminated rubber bearing based on the large-scale shaking table is achieved by the use of a tri-camera high-speed videogrammetric system consisting of three complementary-metal-oxide-semiconductor (CMOS) cameras, one synchronou

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Liu, Jianhua, Haonan Yang, Jing He, Zhenwen Sheng, and Shou Chen. "Unbalanced Fault Diagnosis Based on an Invariant Temporal-Spatial Attention Fusion Network." Computational Intelligence and Neuroscience 2022 (March 30, 2022): 1–15. http://dx.doi.org/10.1155/2022/1875011.

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The health status of mechanical bearings concerns the safety of equipment usage. Therefore, it is of crucial importance to monitor mechanical bearings. Currently, deep learning is the mainstream approach for this task. However, in practical situations, the majority of fault samples have the issue of severe class unbalancing, which renders conventional deep learning inapplicable. Targeted at this issue, this paper proposes an invariant temporal-spatial attention fusion network called ITSA-FN for bearing fault diagnosis under unbalanced conditions. First, the proposed method utilizes the invaria

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Lin, Shih-Lin. "Intelligent Fault Diagnosis and Forecast of Time-Varying Bearing Based on Deep Learning VMD-DenseNet." Sensors 21, no. 22 (2021): 7467. http://dx.doi.org/10.3390/s21227467.

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Rolling bearings are important in rotating machinery and equipment. This research proposes variational mode decomposition (VMD)-DenseNet to diagnose faults in bearings. The research feature involves analyzing the Hilbert spectrum through VMD whereby the vibration signal is converted into an image. Healthy and various faults show different characteristics on the image, thus there is no need to select features. Coupled with the lightweight network, DenseNet, for image classification and prediction. DenseNet is used to build a model of motor fault diagnosis; its structure is simple, and the calcu

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Zeng, Yimei, and Yang Yu. "Diagnosis of Sliding Bearing Lubrication State Based on SC-ResNet." International Journal of Computer Science and Information Technology 2, no. 3 (2024): 201–9. http://dx.doi.org/10.62051/ijcsit.v2n3.22.

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In response to the issue of poor diagnostic performance of models due to the scarcity of samples for lubrication failure states in sliding bearings in practical engineering applications, this thesis proposes a fault diagnosis method for the lubrication state of sliding bearings based on a Self-Calibrated Residual Network (SC-ResNet). By leveraging the self-calibrated convolution, which significantly enhances the network's receptive field and feature extraction capabilities without increasing the number of parameters and complexity, a self-calibrated residual block is designed to construct the

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Luo, Yuanqing, Yuhang Yang, Shuang Kang, Xueyong Tian, Shiyue Liu, and Feng Sun. "Wind Turbine Bearing Failure Diagnosis Using Multi-Scale Feature Extraction and Residual Neural Networks with Block Attention." Actuators 13, no. 10 (2024): 401. http://dx.doi.org/10.3390/act13100401.

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Wind turbine rolling bearings are crucial components for ensuring the reliability and stability of wind power systems. Their failure can lead to significant economic losses and equipment downtime. Therefore, the accurate diagnosis of bearing faults is of great importance. Although existing deep learning fault diagnosis methods have achieved certain results, they still face limitations such as inadequate feature extraction capabilities, insufficient generalization to complex working conditions, and ineffective multi-scale feature capture. To address these issues, this paper proposes an advanced

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Garnier, Thierry, Dominique Bonneau, and Christian Grente. "Three-Dimensional EHD Behavior of the Engine Block/Crankshaft Assembly for a Four Cylinder Inline Automotive Engine." Journal of Tribology 121, no. 4 (1999): 721–30. http://dx.doi.org/10.1115/1.2834128.

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Detailed formulations are presented for an EHD model that studies all the engine main bearings, considering the bearings, housing and crankshaft elastic deformations in connection with the hydrodynamic pressure fields as well as the quasi-static loads balance for this complex kinematic system. The calculation process uses the finite element method and the Newton-Raphson method for the numerical analysis. The elastic crankshaft behavior is quantified by a standard stiffness matrix. With two structural analysis steps, a condensed housing stiffness matrix is obtained to reduce the computing time.

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M., I. KAPITSA, M. HNENNYI O., and V. BOBYR D. "EFFICIENCY OF MODERNIZATION OF WHEEL-MOTOR BLOCKS (WMB) USING ANTI-FRICTION TRACTION MOTOR SUPPORT BEARINGS (TMSB)." Science and Transport Progress, no. 4(76) (August 28, 2018): 111–24. https://doi.org/10.15802/stp2018/141178.

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<strong>Purpose</strong>. The use of anti-friction traction motor support bearings (TMSB) instead of plain friction traction motor support bearings is a priority direction of locomotive development both for newly constructed locomotives and for those in operation. The solution of the set tasks for introduction of wheel-motor blocks (WMB) with anti-friction bearings demanded the search for alternative variants and new technical solutions. The purpose of the article is to determine the feasibility of re-equipping the diesel locomotive wheel-motor blocks with anti-friction bearings through the li

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Ahsan, Ammar, Kyle Kenney, Jonas Kröger, and Stefan Böhm. "Hydrostatic Bandsaw Blade Guides for Natural Stone-Cutting Applications." Journal of Manufacturing and Materials Processing 4, no. 1 (2020): 20. http://dx.doi.org/10.3390/jmmp4010020.

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In a bandsaw machine, the blade guides provide additional stiffness and help to align the blade near the cutting region. Typically, these are either in the form of blocks made of carbide or ceramics or as sealed bearings. Abrasive particles, generated while cutting hard and brittle materials like natural stones, settle between the contact surfaces of the guides and the blade causing wear and premature failure. The hydrostatic guide system, as presented in this work, is a contactless blade guiding method that uses the force of several pressurized water jets to align the blade to the direction o

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Leszczyńska-Madej, B., and M. Madej. "The Properties of Babbitt Bushes in Steam Turbine Sliding Bearings." Archives of Metallurgy and Materials 56, no. 3 (2011): 805–12. http://dx.doi.org/10.2478/v10172-011-0089-6.

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The Properties of Babbitt Bushes in Steam Turbine Sliding BearingsThe analysis of the properties of babbitt bushes is presented in this article. Materials intended for examinations were charged from the TK-120 steam turbine of TG-8 turbosystem from the Power Station Stalowa Wola. The specimens were subsequently tested for Brinell hardness, microhardness, bending strength and wear resistance. The wear tests were carried out using the block-on-ring tester. The samples were also investigated by means of both light microscopy (LM) and scanning electron microscopy (SEM).

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Han, Te, Dongxiang Jiang, and Nanfei Wang. "The Fault Feature Extraction of Rolling Bearing Based on EMD and Difference Spectrum of Singular Value." Shock and Vibration 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/5957179.

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Nowadays, the fault diagnosis of rolling bearing in aeroengines is based on the vibration signal measured on casing, instead of bearing block. However, the vibration signal of the bearing is often covered by a series of complex components caused by other structures (rotor, gears). Therefore, when bearings cause failure, it is still not certain that the fault feature can be extracted from the vibration signal on casing. In order to solve this problem, a novel fault feature extraction method for rolling bearing based on empirical mode decomposition (EMD) and the difference spectrum of singular v

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Yang, Changbao, Zhisheng Wang, Yuanwei Lyu, Jingyang Zhang, and Ben Xu. "Numerical Investigation of Gas Dynamic Foil Bearings Conjugated with Contact Friction by Elastic Multi-Leaf Foils." Aerospace 10, no. 7 (2023): 585. http://dx.doi.org/10.3390/aerospace10070585.

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With increasing demand for load capacity and dynamic responses, the new generation of Gas Dynamic Foil Bearings (GDFB), assembled from preloaded elastic multi-leaf foils, has been put forward. It exhibits steady and dynamic characteristics that are more sensitive to the contact friction produced by foil–foil bearings and the housings of foil bearings, distinguishing its response to rigidity from those of classic bearings. This study aims to employ numerical simulations to explore GDFBs conjugated with contact friction using elastic multi-leaf foils. A numerical method with Bidirectional Fluid–

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Wang, Liwu, Yanfeng Han, Dongxing Tang, and Jianlin Cai. "Numerical and experimental investigations on the wear behavior of water-lubricated bearings with different materials." Industrial Lubrication and Tribology 74, no. 1 (2022): 134–43. http://dx.doi.org/10.1108/ilt-09-2021-0369.

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Purpose The purpose of this paper is to verify the effectiveness of the proposed transient mixed lubrication and wear coupling model [mixed lubrication and wear (MLW) coupling model] under water lubricated conditions by comparing with the experimental results. Design/methodology/approach Water lubricated bearings are the key parts of the transmission system of an underwater vehicle and some surface ships. In this study, the friction and wear behaviors of rubber, nylon and polyether ether ketone (PEEK) samples with stainless steel underwater lubrication were compared by using ring-block contact

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Wang, Huaqing, Wenbo Zhang, Changkun Han, Zhenbao Fu, and Liuyang Song. "A bearing fault diagnosis method with an improved residual Unet diffusion model under extreme data imbalance." Measurement Science and Technology 35, no. 4 (2024): 046113. http://dx.doi.org/10.1088/1361-6501/ad1708.

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Abstract As a vital constituent of rotating machinery, rolling bearings assume a pivotal function in ensuring the stable operation of equipment. Recently, deep learning (DL)-based methods have been able to diagnose bearing faults accurately. However, in practical applications, the severe data imbalance caused by the limited availability of fault data compared to the abundance of healthy data poses challenges to the effective training of DL models, leading to a decrease in diagnostic accuracy. In this paper, a bearing fault diagnosis method with the improved residual Unet diffusion model (IResU

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Zuo, Yu Yu. "Gas Turbine Engines Lubrication System Design." Advanced Materials Research 900 (February 2014): 773–76. http://dx.doi.org/10.4028/www.scientific.net/amr.900.773.

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There are many reasons for having a lubricant within the engine besides that of reducing friction. However scrupulously clean the engine is maintained, there will always be a small amount of dirt or impurities that find their way inside. That dirt must be removed before it can cause damage to bearings or block small oil passageways. The oil can be used to keep the engine clean by carrying dirt to the oil filter where it is strained out and where it remains until replacement of the filter. The majority of the bearings within the engine are manufactured from steel, a metal which would soon oxidi

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