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Journal articles on the topic 'Hydrodynamic bearing'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

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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2

Hirani, H., and P. Samanta. "Hybrid (hydrodynamic + permanent magnetic) journal bearings." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 221, no. 8 (2007): 881–91. http://dx.doi.org/10.1243/13506501jet282.

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Survey of patents on bearings indicates the maturity of hydrodynamic and rapid development of magnetic bearings. Active magnetic bearings are costlier compared with permanent magnetic bearings. To understand the performance characteristics of permanent magnetic bearings, an experimental setup has been developed. Experimental studies on radial permanent magnetic bearings demonstrated the drawbacks, such as high axial thrust and low load capacity. This has led the authors to hybridize the permanent magnet with hydrodynamic technology and to explore the possibility of achieving the low starting t

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3

Xiang, Chang Zheng, Yu Juan Wang, and Yun Fei Chen. "Hydrodynamic Lubrication in a Nanoscale Bearing." Advanced Materials Research 60-61 (January 2009): 1–5. http://dx.doi.org/10.4028/www.scientific.net/amr.60-61.1.

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Nonequilibrium molecular dynamics simulation is used to simulate the hydrodynamics lubrication in the nanoscale bearing. A physical model of the nanascale bearing that the thin liquid water film confined between two solid walls has been set up. The simulation results indicate that the hydrodynamic pressure profiles as the macroscopic state are formed in nanoscale bearings. The hydrodynamic pressure increases with increasing shear velocity, and corresponding load capacity also increases with increasing sliding velocity of the upper driven wall. These results are in accordance with classical Rey

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4

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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5

Baumann, Katrin, and Hermann Freund. "Modelling and Simulation of Aerodynamic Cylindrical Bearings Using ANSYS Hydrodynamic Bearing Element Types." Vehicles 5, no. 3 (2023): 1118–32. http://dx.doi.org/10.3390/vehicles5030061.

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Modern power engine concepts and environmental restrictions demand oil-free lubrication of rotors, for example, by gas bearings. However, the stiffness and damping properties ruling the rotor’s dynamics are poorly documented for aerodynamic bearings and simple calculation methods are lacking. Based on the similarity between aerodynamic and hydrodynamic journal bearings, it is investigated to what extent the hydrodynamic bearing element types of the commercial FE program ANSYS are also suitable for air bearings. Within these elements, the compressibility of the gas is neglected. After verificat

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6

Wang, Chin-Cheng, and Chieh-Lin He. "Numerical study of a hydrodynamic journal bearing with herringbone grooves for oil leakage reduction." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, no. 3 (2018): 439–46. http://dx.doi.org/10.1177/1350650118785660.

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Hydrodynamic journal bearings and herringbone-grooved journal bearings were numerically analyzed using finite volume-based computational fluid dynamics software. Navier–Stokes equations were solved to describe pressure and velocity distributions in three dimensions. Values of the Sommerfeld number were calculated as a benchmark case for a hydrodynamic journal bearing. The predicted values of the Sommerfeld number are comparable to theoretical results from engineering tribology literature. For a hydrodynamic journal bearing, it is found that there is a positive correlation between the maximum p

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7

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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8

Heshmat, Crystal A., David S. Xu, and Hooshang Heshmat. "Analysis of Gas Lubricated Foil Thrust Bearings Using Coupled Finite Element and Finite Difference Methods." Journal of Tribology 122, no. 1 (1999): 199–204. http://dx.doi.org/10.1115/1.555343.

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Load performance of gas lubricated, compliant surface foil thrust bearings has an interlocking relationship with the compliance of the bearing and hydrodynamics of convergent wedge surface. Compliance of the bearing consists of supporting spring elements (elastic foundation) and a smooth elastic top foil. In this paper, a class of gas lubricated foil thrust bearings has been investigated analytically utilizing a novel approach which combines Finite Difference (FD) and Finite Element (FE) methods. Solution of the governing hydrodynamic equations dealing with compressible fluid is coupled with t

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9

Gengyuan, Gao, Yin Zhongwei, Jiang Dan, and Zhang Xiuli. "CFD analysis of load-carrying capacity of hydrodynamic lubrication on a water-lubricated journal bearing." Industrial Lubrication and Tribology 67, no. 1 (2015): 30–37. http://dx.doi.org/10.1108/ilt-03-2013-0028.

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Purpose – The purpose of this paper is to improve hydrodynamic load-carrying capacity of a water-lubricated journal bearing by a new bush structure. Water-lubricated bearing is becoming more and more popular since it is environmentally friendly and saves energy. However, contrary to oil and grease-lubricated bearings, water-lubricated bearing is limited in many situations due to its low hydrodynamic load-carrying capacity. Design/methodology/approach – The present article proposes a new bearing bush, with a transition-arc structure, which is favorable for increasing hydrodynamic load-carrying

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10

Xiang, Guo, Yanfeng Han, Renxiang Chen, Jiaxu Wang, Xiaokang Ni, and Ke Xiao. "A hydrodynamic lubrication model and comparative analysis for coupled microgroove journal-thrust bearings lubricated with water." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 234, no. 11 (2019): 1755–70. http://dx.doi.org/10.1177/1350650119884798.

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The novelty of this study is to develop a hydrodynamic lubrication numerical model for coupled microgroove journal-thrust bearings (or coupled bearings) under water-lubricated condition. In the present model, the continuity of the hydrodynamic pressure and the fluid field (or coupled hydrodynamic effect) at common boundary is considered to reveal the mutual effect between the hydrodynamic behavior of the journal bearing and the thrust bearing. The lubrication performances of the coupled microgroove bearing with three bottom shapes, i.e., isosceles triangle, right triangle, and left triangle, a

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11

Kustosz, R., I. Altyntsev, M. Darlak, et al. "The Tin Coatings Utilisation As Blood Contact Surface Modification In Implantable Rotary Left Ventricle Assist Device Religaheart Rot." Archives of Metallurgy and Materials 60, no. 3 (2015): 2253–60. http://dx.doi.org/10.1515/amm-2015-0371.

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Abstract Constructions of the mechanical-bearingless centrifugal blood pumps utilize different types of non-contact physical bearings, which allows to balance the forces that have an impact on the pump impeller, stabilizing its position in the pump house without wall contact. The paper presents investigations of the hybrid (passive magnetic bearings and hydrodynamic bearings) suspension system for the centrifugal blood pump. Numerical simulations were used to evaluate the hydrodynamic bearing lifting force and magnetic bearing forces interaction. An important aspect of rotor suspension system

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12

Nadia, Bendaoud, and Mehala Kadda. "Numerical Analysis of the Fluid Flow Behavior in the Plain Journal Bearing at Textured and Not Textured Surface." International Journal of Surface Engineering and Interdisciplinary Materials Science 9, no. 1 (2021): 40–59. http://dx.doi.org/10.4018/ijseims.2021010103.

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Hydrodynamic plain bearings are components that provide the guiding in rotation of rotating machines, such as turbines, the reactors. This equipment works under very severe operating conditions. In order to improve the hydrodynamic performance of these rotating machines, the industrialists specialized in the manufacture of hydrodynamic bearings have designed a bearing model with its textured interior surface. The numerical analysis is carried out to study the for both plain bearings types with a textured a non-textured surface thus to see the improvement of the plain bearing hydrodynamic perfo

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13

WODTKE, Michał. "HYDRODYNAMIC THRUST BEARINGS WITH POLYMER LINING." Tribologia 268, no. 4 (2016): 225–37. http://dx.doi.org/10.5604/01.3001.0010.6998.

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Polymeric linings of sliding surfaces of the hydrodynamic bearings have been used successfully for over 50 years. Despite of their long history of operation and research, they have not become widespread in industrial applications. This fact may be surprising, considering the conclusions that have been published concerning bearing operation and design. This paper summarizes the current state of the art of the tilting-pad thrust bearings with a polymer lining of pad sliding surfaces. Bearing design and the most commonly used polymeric materials are described. The results of the latest theoretica

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14

Wang, You-Qiang, Xiu-Jiang Shi, and Li-Jing Zhang. "Experimental and numerical study on water-lubricated rubber bearings." Industrial Lubrication and Tribology 66, no. 2 (2014): 282–88. http://dx.doi.org/10.1108/ilt-11-2011-0098.

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Purpose – Water-lubricated rubber bearing is one of the most appropriate bearings for underwater use. The most popular design used widely today is the straight fluted rubber bearing. The special configuration leads to partial hydrodynamic lubrication and low load capacity. A new bearing bush structure with two cavities which is favorable for constructing continuous hydrodynamic lubrication was designed and studied. The paper aims to discuss these issues. Design/methodology/approach – A new bearing bush structure with two cavities which is favorable for constructing continuous hydrodynamic lubr

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15

Li, H. Y., M. K. Zhang, Q. Y. Wu, and X. W. Luo. "Investigation on suitable design parameters for hydrodynamic bearing of LVADs." Journal of Physics: Conference Series 2707, no. 1 (2024): 012117. http://dx.doi.org/10.1088/1742-6596/2707/1/012117.

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Abstract Left ventricular assist devices (LVADs) are crucial and helpful to support heart function for patients with heart failure. For the LVAD with hydrodynamic bearings, high reliability of the bearing is necessary to support the rotor and achieve the performance of LVADs. This research investigates the effect of various design parameters on the performance of a dislocated hydrodynamic bearing in LVAD based on numerical simulation, where Reynolds equation is solved to simulate the behaviour of the bearing under different design conditions. For the design of hydrodynamic bearing, several par

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16

Talih, Galip, Sani Kandemir, and Mehmet Bagcı. "Hydrostatic And Hydrodynamic Bearing On Grinding Machine." European Journal of Research and Development 4, no. 4 (2024): 188–203. https://doi.org/10.56038/ejrnd.v4i4.542.

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In recent years, the demand for hydrostatic bearing application has been increasing due to the possibilities and advantages they offer. Advances in the understanding of hydrostatic lubrication and the improvement of computer technology have opened new avenues for improving hydrostatic bearing performance and precision. This paper reviews the geometry, advantages and disadvantages of hydrostatic bearings, including the hydraulic system. Hydrostatic bearing applications operate using relatively high viscosity oil, but have the potential for extremely low motion errors with high damping, high sti

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17

Thomsen, Kim, and Peder Klit. "Improvement of journal bearing operation at heavy misalignment using bearing flexibility and compliant liners." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 226, no. 8 (2012): 651–60. http://dx.doi.org/10.1177/1350650112439372.

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A flexure journal bearing design is proposed that will improve operational behaviour of a journal bearing at pronounced misalignment. Using a thermoelastohydrodynamic model, it is shown that the proposed flexure journal bearing has vastly increased the hydrodynamic performance compared to the stiff bearing when misaligned. The hydrodynamic performance is evaluated on lubricant film thickness, pressure and temperature. Furthermore, the influence of a compliant bearing liner is investigated and it is found that it increases the hydrodynamic performance when applied to a stiff bearing, whereas th

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18

CZABAN, Adam. "CFD ANALYSIS OF THE HYDRODYNAMIC LUBRICATION OF A MISALIGNED, SLIDE CONICAL BEARING." Tribologia 268, no. 4 (2016): 41–53. http://dx.doi.org/10.5604/01.3001.0010.6977.

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The lateral loads carried by hydrodynamic bearings, and also their uneven distribution, introduce an additional axial misalignment between the shaft and sleeve. The machining and mounting errors also result in improper initial alignment of bearing shaft or sleeve. Furthermore, due to vibrations, misalignment of shaft fluctuates during the operation of the bearing. This has an impact on the operating parameters of the bearing, and, in extreme cases, where the maximum allowable value of the misalignment is exceeded, the bearing can be damaged. The aim of this work is to investigate the effect of

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19

Diop, Khadim, Abdérafi Charki, Stéphane Champmartin, and Abdelhak Ambari. "Reliability of a Hydrodynamic Journal Bearing." Applied Mechanics and Materials 789-790 (September 2015): 342–52. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.342.

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Journal fluid bearings are widely used in industry due to their static and dynamic behavior and their very low coefficient of friction. The technical requirements to improve the new technologies design are increasingly focused on the indicators of dependability of systems and machines. Then, it is necessary to develop a methodology to study the reliability of bearings in order to improve and to evaluate their design quality. Few works are referenced in literature concerning the estimation of the reliability of fluid journal bearings. This paper deals with a methodology to study the failure pro

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20

Ziese, Christian, Cornelius Irmscher, Steffen Nitzschke, Christian Daniel, and Elmar Woschke. "Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation." Lubricants 9, no. 4 (2021): 44. http://dx.doi.org/10.3390/lubricants9040044.

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The vibration behaviour of turbocharger rotors is influenced by the acting loads as well as by the type and arrangement of the hydrodynamic bearings and their operating condition. Due to the highly non-linear bearing behaviour, lubricant film-induced excitations can occur, which lead to sub-synchronous rotor vibrations. A significant impact on the oscillation behaviour is attributed to the pressure distribution in the hydrodynamic bearings, which is influenced by the thermo-hydrodynamic conditions and the occurrence of outgassing processes. This contribution investigates the vibration behaviou

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21

Wang, Chin-Cheng, and Jyun-Ting Lin. "Numerical study of hydrodynamic herringbone-grooved journal bearings combined with thrust bearings considering thermal effects." Journal of Mechanics 38 (2022): 13–21. http://dx.doi.org/10.1093/jom/ufab036.

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Abstract Hydrodynamic herringbone-grooved journal bearings (HGJBs) are analyzed by solving Navier–Stokes and energy equations. It is well known that the load capacity of hydrodynamic bearings may be affected by high temperatures and low oil viscosity. Therefore, the main objective of this study is to understand the pressure distribution of hydrodynamic HGJBs under different oil viscosity and eccentricity ratios. In this paper, 3 different configurations are studied, namely, a HGJB, a combined HGJB and thrust bearing, and a combined HGJB and grooved thrust bearing. The bearing characteristics,

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22

Feng, N. S., and E. J. Hahn. "Vibration Analysis of Statically Indeterminate Rotors With Hydrodynamic Bearings." Journal of Tribology 120, no. 4 (1998): 781–88. http://dx.doi.org/10.1115/1.2833779.

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In statically indeterminate rotor bearings systems, where the rotor is supported by one or more hydrodynamic bearings, the reactions at each hydrodynamic bearing, and hence its stiffness and damping properties depend not only on the bearing type, the operating conditions and the bearing dimensions but also on the relative lateral alignment between the journal and the bearing housing; the alignment, therefore, has a significant influence on the system stability and unbalance response. Additional complications arise if nonsymmetric bearing types such as elliptic or tilting pad bearings are prese

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23

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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24

Tieu, A. K. "Hydrodynamic Thrust Bearings: Theory and Experiment." Journal of Tribology 113, no. 3 (1991): 633–38. http://dx.doi.org/10.1115/1.2920671.

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In this paper results from experimental studies and computer simulation of hydro-dynamic tilting thrust bearings are presented. The bearing performance in terms of outlet film thickness, friction coefficient, and bearing temperature was measured in a high speed thrust bearing test rig. The numerical simulation involves the solution of the generalized Reynolds equation and the energy equation, which considers thermal effects on the oil viscosity and the squeezing of the oil film.

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25

Wang, You Qiang, and Chao Li. "Numerical Analysis of Hydrodynamic Lubrication on Water-Lubricated Rubber Bearings." Advanced Materials Research 299-300 (July 2011): 12–16. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.12.

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Water lubricated rubber bearings are one of the most appropriate bearings for underwater use. The most popular design used widely today is the straight fluted rubber bearing. The special configuration leads to partial hydrodynamic lubrication and low load capacity. A new bearing bush structure which is favorable for constructing continuous hydrodynamic lubrication was designed and produced for experiment in the paper. The eccentricity ratio of the new structure rubber bearing was measured under different loads in experiment. Used the measured eccentricity ratios, the load capacity was calculat

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26

Kumar, Paras, and Ashish Kumar Gupta. "Experimental Investigation on Hydrodynamic Journal Bearing using SAE 10W30 Multi Grade Oil." International Journal of Advance Research and Innovation 2, no. 1 (2014): 179–85. http://dx.doi.org/10.51976/ijari.211429.

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This paper presents an experimental study of pressure distribution on hydrodynamic journal bearing with SAE 10W30 multi grade oil. Hydrodynamic Journal bearing test rig (HJBTR) is used to test the 40 mm diameter and 40 mm long bearing (l/d = 1) made of Bronze. Test bearing is located between two antifriction bearings and loaded mechanically. The space between the shaft and the bearing is filled with SAE 10W30. A constant load of 800 N is applied at various journal rotational speeds of 1000, 1500, 2000 rpm. Various parameters like frictional torque, oil temperature and pressure at 10 different

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27

Szczęch, Marcin, Wojciech Horak, and Yuliia Tarasevych. "NUMERICAL ANALYSIS OF OPERATING PARAMETERS OF HYDRODYNAMIC THRUST BEARINGS LUBRICATED WITH MAGNETIC FLUID." Tribologia 291, no. 3 (2020): 43–51. http://dx.doi.org/10.5604/01.3001.0014.4764.

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The paper presents the results of numerical simulations (CFD) of hydrodynamic thrust slide bearings lubricated with magnetorheological (MR) fluid. The analyses were carried out to evaluate the influence of the rheological properties of the lubricant, as well as the geometry of the bearing's thrust pad surface. Bearing load conditions were considered on the key functional features of the system, i.e. axial force and torque. The paper presents a comparative analysis of various geometries of thrust bearings and points out possible functional features of hydrodynamic thrust bearings lubricated wit

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28

Vasilenko, V. V., V. I. Kirishchieva, M. A. Mukutadze, and V. E. Shvedova. "Investigation of the Wear Resistance of a Journal Bearing with Polymer-Coated Grooved Support Ring." Advanced Engineering Research 22, no. 4 (2023): 365–72. http://dx.doi.org/10.23947/2687-1653-2022-22-4-365-372.

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Introduction. In modern heavy-loaded friction units, metallopolymer coated bearings operating in the boundary friction mode are widely used. Their successful application is provided by the viscoelastic deformation of these coatings under load. To pass from boundary friction to liquid friction, it is required to create a bearing hydrodynamic wedge. Currently, the use of journal bearings with polymer-coated grooved support ring is hindered by the lack of a methodology for their calculation. This work analyzes a model of movement of a micropolar lubricant in the operating clearance of a journalbe

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29

Lai, Tianwei, Yu Guo, Wei Wang, Yu Wang, and Yu Hou. "Development and Application of Integrated Aerodynamic Protuberant Foil Journal and Thrust Bearing in Turboexpander." International Journal of Rotating Machinery 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/8430943.

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Foil bearing provides compliant support and moderate Coulomb friction for rotor-bearing system, which is conducive to stability and reliability of high speed rotating machinery. In this paper, both hydrodynamic lubricated foil journal and foil thrust bearings are applied in a 150 m3·h−1 turboexpander for air separation. In the bearings, protuberant foil is chosen as the supporting subfoil due to its merits of easy fabrication and assembly. Static loading and deflection of the bearings are tested, respectively, before integration into the turboexpander. Afterwards, the loading and deflection cu

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30

Santos, I. F., and F. H. Russo. "Tilting-Pad Journal Bearings With Electronic Radial Oil Injection." Journal of Tribology 120, no. 3 (1998): 583–94. http://dx.doi.org/10.1115/1.2834591.

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This paper gives a theoretical treatment of the problem of journal bearings modeling connected to electronic oil injection into the bearing gap. The feasibility of influencing the static behavior of hydrodynamic forces by means of such oil injection is investigated. The lubricant is injected into the bearing gap by two mechanisms of lubrication: the conventional hydrodynamic lubrication and through orifices distributed along the bearing surface (active lubrication in the radial direction). By controlling the pressure of the oil injection, it is possible to get large variations in the active hy

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31

Kishor, B., and S. K. Gupta. "On the Dynamic Analysis of a Rigid Rotor-Gear Pair-Hydrodynamic Bearing System." Journal of Vibration and Acoustics 111, no. 3 (1989): 234–40. http://dx.doi.org/10.1115/1.3269847.

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This paper is an attempt to provide a dynamic analysis of a rigid rotor-gear pair-hydrodynamic bearing system with journal motions in the oil film space of the bearings. A mathematical model has been developed considering the kinematics of the gear pair as affected by journal motions and using a concept of an instantaneous line of action. Effects of bearing parameters on dynamic tooth loads have been studied. The load-speed environment of hydrodynamic bearings supporting the geared rotors is shown to be affected by journal motions in bearings. Results indicate that, for the given gear pair and

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Czaban, Adam. "CFD Analysis of Hydrodynamic Pressure Distribution in Non-Newtonian Oil in Journal Bearing Lubrication Gap." Solid State Phenomena 220-221 (January 2015): 37–42. http://dx.doi.org/10.4028/www.scientific.net/ssp.220-221.37.

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This paper presents the results of CFD analysis of the hydrodynamic pressure distribution in slide journal bearings lubricated by non-Newtonian oil. It was assumed that the oil shear stress varies from shear rate according to the Ostwald–de Waele relationship (power law lubricant). The comparison was related to bearings differences only in properties of lubricating oil – Newtonian and non-Newtonian properties; other parameters for both in each case were the same. The Tables show relative decrease of the maximum hydrodynamic pressure value and bearing lift capacity according to the bearing lubr

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Li, Song Sheng, Zhi Hong Hu, Peng Zhou, et al. "Analysis of Heating Performances for Ultra-High Speed Electric Spindle Bearings Based on the Energy Theory of TEHL in Point Contact State." Applied Mechanics and Materials 37-38 (November 2010): 135–40. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.135.

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To analyze the lubricating state and the heating performances of the spindle bearings in ultra-high speed electric spindles, taken the characteristics of oil-air lubrication into account and based on the theories about rolling bearing dynamics and thermal elasto-hydrodynamic lubrication in point contact state, a model was built with the energy method for analyzing the heating performances the ball elements on both raceways in spindle bearings. An equation was derived for calculating the total quality of heat produced in a bearing. The influences of some basic factors such as the running speed,

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34

Lu, Daixing, Yinsheng Zhang, and Junjie Lu. "Numerical Study on the Bearing Capacity of Lubricant Film in Journal Bearing with Micro-textured Surface." Journal of Physics: Conference Series 2477, no. 1 (2023): 012039. http://dx.doi.org/10.1088/1742-6596/2477/1/012039.

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Abstract For studying the hydrodynamic lubrication performance of micro-textured radial journal bearings, a numerical model of hydrodynamic lubrication for journal bearings was established first. Solve the established numerical model using FDM, and the lubricant film pressure distribution and static characteristics of bearings were obtained. Considering the processing cost and feasibility of the processing technology, the cylindrical texture arranged in the radial of the bearing shell surface is applied, the lubricant film thickness equation considering the micro-texture is introduced into the

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35

Guo Xiang, Guo Xiang, Yanfeng Han, Renxiang Chen, Jiaxu Wang Jiaxu Wang, and Ni Xiaokang. "A numerical method to investigate the mixed lubrication performances of journal-thrust coupled bearings." Industrial Lubrication and Tribology 71, no. 9 (2019): 1099–107. http://dx.doi.org/10.1108/ilt-02-2019-0063.

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Purpose This paper aims to present a numerical model to investigate the mixed lubrication performances of journal-thrust coupled bearings (or coupled bearings). Design/methodology/approach The coupled hydrodynamic effect (or coupled effect) between the journal and the thrust bearing is considered by ensuring the continuity of the hydrodynamic pressure and the flow field at the common boundary. The mixed lubrication performances of the coupled bearing are comparatively studied for the cases of considering and not considering coupled effect. Findings The simulated results show that the hydrodyna

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36

Karimaei, Hadiseh, and H. R. Chamani. "Effect of Crankshaft and Crankcase Material Stiffness on Load Distribution in Main Bearings." International Journal of Automotive and Mechanical Engineering 15, no. 4 (2018): 5941–56. http://dx.doi.org/10.15282/ijame.15.4.2018.16.0453.

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In multi-cylinder diesel engines, hydrodynamic pressure distribution of main bearings has significant effect on the load distribution applied on engine crankcase, therefore, has an effect on the stress distribution and deflection of crankcase. Flexibility of crankshaft and crankcase assembly has significant effect on load distribution in engine main bearings. In this paper, the effect of elastic deformations of both crankshaft and crankcase on the load distribution in the main bearings is studied. Considering deformations of crankcase and crankshaft together with the elasto-hydrodynamic (EHD)

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37

Hu, Xinliang, Jun Wang, Kaiping Yu, and Quande Chi. "Research on the influence of lubrication performance of hydrodynamic journal bearings based on orthogonal test method." Advances in Engineering Technology Research 1, no. 3 (2023): 775. http://dx.doi.org/10.56028/aetr.3.1.775.

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The orthogonal experiment design method is used based on analysis of lubrication of hydrodynamic journal bearing．The effect of structural parameters ( bearing diameter，wide diameter ratio and clearance ratio) and operating parameters ( linear velocity and specific pressure) on lubrication performance of hydrodynamic journal bearings is studied． The results show that the linear velocity and specific pressure have significant influence on maximum oil film pressure of the bearings．The influence of specific pressure and bearing diameter on load capacity of the bearings is significant．The bearing d

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Eusepi, M. W., and D. F. Wilcock. "A New Hydrodynamic Gas Bearing Concept." Journal of Tribology 110, no. 4 (1988): 614–20. http://dx.doi.org/10.1115/1.3261702.

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Difficulty in attaining and controlling a desirable level of damping in foil bearings, and in designing them for large shaft diameters, led to the concept of the Hydroflex™ bearing. In this concept, each of a number of rigid shoes is supported on a compound post and beam flexure, and the radial motion of the pad is damped by a Coulomb friction damper. In this fashion, the tolerance of the foil to shaft growth (centrifugal and thermal) and to misalignment is retained with the added advantages of a larger and controlled level of damping plus the ready availability of conventional gas bearing the

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Snyder, Troy, and Minel Braun. "A CFD-Based Frequency Response Method Applied in the Determination of Dynamic Coefficients of Hydrodynamic Bearings. Part 1: Theory." Lubricants 7, no. 3 (2019): 23. http://dx.doi.org/10.3390/lubricants7030023.

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A general, CFD-based frequency response method for obtaining the dynamic coefficients of hydrodynamic bearings is presented. The method is grounded in experimental parameter identification methods and is verified for an extremely long, slider bearing geometry as well as short and long journal bearing geometries. The influence of temporal inertia on the dynamic response of the bearings is discussed and quantified through the inclusion of added mass coefficients within the mechanical models of the hydrodynamic bearing films. Methods to separate the dynamic stiffness into static stiffness and add

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Fowell, M., A. V. Olver, A. D. Gosman, H. A. Spikes, and I. Pegg. "Entrainment and Inlet Suction: Two Mechanisms of Hydrodynamic Lubrication in Textured Bearings." Journal of Tribology 129, no. 2 (2006): 336–47. http://dx.doi.org/10.1115/1.2540089.

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A new mechanism of hydrodynamic lubrication termed “inlet suction,” applicable to low convergence, micropocketed bearings, has been identified. In this, sliding of one of the bearing surfaces generates a subambient pressure in pockets close to the bearing inlet. Because this pressure is less than the external atmospheric pressure, lubricant is “sucked” into the bearing through the inlet land. This is quite a different mechanism from classical entrainment due to shear. In the current paper flow, hydrodynamic load support and friction are calculated using analytical solutions for simple pocketed

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Zhang, Yongbin, Huansheng Cheng, and Junyan Wang. "Recent Patents on Abnormal Hydrodynamic Thrust Slider Bearings: Part II-the Second Mode of the Bearings." Recent Patents on Mechanical Engineering 13, no. 1 (2020): 35–40. http://dx.doi.org/10.2174/2212797612666191031095436.

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Background: As a successive part, the paper introduces the second mode of abnormal hydrodynamic thrust slider bearings with divergent surface separations registered in the patents, where the boundary slippage is artificially designed both on the stationary surface in the inlet zone and on the whole moving surface. Objective : To introduce a second method for artificially designing the boundary slippage for the formation of abnormal hydrodynamic thrust slider bearings. Methods: The analytical results are presented for the introduced bearings. The performances of the bearings are demonstrated. R

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Mehrotra, Pranav, Paras Seth, Ishaan Nagpal, Devansh Rastogi, and Vivek Kumar. "CFD analysis of hydrodynamic journal bearing operating with non-newtonian lubricant." Journal of Interdisciplinary Mathematics 27, no. 7 (2024): 1637–61. https://doi.org/10.47974/jim-2005.

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The hydrodynamic journal bearing is a crucial machine element used to support radial load in turbomachines. The research in journal bearings focuses on enhancing the steady state and dynamic performance indices. This study deals with the CFD simulations of hydrodynamic journal bearing operating with non-Newtonian lubricants. The CFD simulations have been performed using the Fluent module of Ansys 2023. The Power law fluid model has been used to describe the non-Newtonian character of the lubricant. The plots are generated for maximum fluid pressure, film pressure distribution, and turbulence d

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Jamwal, Gourav, Sanjay Sharma, and R. K. Awasthi. "The dynamic performance analysis of chevron shape textured hydrodynamic bearings." Industrial Lubrication and Tribology 72, no. 1 (2019): 1–8. http://dx.doi.org/10.1108/ilt-05-2019-0172.

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Purpose This paper aims to evaluate the various dynamic performance parameters of hydrodynamic journal bearings. For this, the bearing’s inner surface is textured with chevron-shaped textures with different texture depths and number of textures in different regions/locations. Design/methodology/approach In the present study, the effect of chevron-shaped texture having different values of texture depths, locations and number of textures has been numerically simulated. The dynamic performance characteristics have been calculated by solving the fluid flow governing Reynolds equation using the fin

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van der Meer, Gerben, and Ron van Ostayen. "Investigating Film Thickness and Friction of an MR-Lubricated Journal Bearing." Lubricants 13, no. 4 (2025): 171. https://doi.org/10.3390/lubricants13040171.

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Magnetorheological (MR) fluids are frequently reported to have potential as lubricants for hydrodynamic bearings operating at high loads, but no comprehensive effort has been made to investigate their performance under a variety of operating conditions. This paper, therefore, presents an extensive experimental and numerical investigation of an MR-lubricated hydrodynamic journal bearing subjected to different loads and magnetic fields, and compares these results to those of an oil-lubricated bearing. It is shown that by increasing the magnetic field strength, the performance characteristics of

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MAHESH, B. NIGADE, G.E. KONDHALKAR PROF., and PATIL PROF.DR.Y.P. "EXPERIMENTAL ANALYSIS OF HYDRODYNAMIC SIMPLE JOURNAL BEARING." JournalNX - A Multidisciplinary Peer Reviewed Journal 2, no. 11 (2016): 5–7. https://doi.org/10.5281/zenodo.1468136.

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The new machine design applications require high operating speed, higher power density, small size, high load carrying capacity and to full fill this requirement it is necessary to consider transmission section. So one of the most important element to be considered for design is bearing. Bearing not only support rotor weight and operating speed but also influence on rotor dynamic behaviour This constant trend towards higher power densities in rotating machinery calls for better mechanical components capable of carrying higher loads while being the same or smaller in size without sacrificing ma

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Rho, B.-H., and K.-W. Kim. "The effect of active control on stability characteristics of hydrodynamic journal bearings with an axial groove." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 216, no. 9 (2002): 939–46. http://dx.doi.org/10.1177/095440620221600907.

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Results of theoretical investigations on stability characteristics of an actively controlled hydrodynamic journal bearing are presented. Proportional, derivative and integral controls are adopted for a hydrodynamic journal bearing with an axial groove. Furthermore, a cavitation algorithm, implementing the Jakobsson-Floberg-Olsson boundary condition, is adopted to predict cavitation regions in a fluid film more accurately than the conventional analysis, which uses the Reynolds condition. Using the bearing's linear dynamic coefficients, which are evaluated from the perturbation method, the stabi

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Navthar, Ravindra R., and N. V. Halegowda. "Experimental Investigation of Oil Film Thickness for Hydrodynamic Journal Bearings." Applied Mechanics and Materials 110-116 (October 2011): 2377–82. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2377.

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Journal bearings are widely applied in different rotating machineries. These bearings allow for transmission of large loads at mean speed of rotation. These bearings are susceptible to large amplitude lateral vibration due to self-exited instability which is known as oil whirl or synchronous whirl. This oil whirl depends on many parameters such as oil film thickness, viscosity of lubricant, load on bearing, inertia of fluid etc. out of which oil film thickness plays an important role in operation of Journal bearings. As oil film thickness decreases metal to metal contact occurs this further ca

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Ballal, Yuvaraj. "Analysis on Active Hydromagnetic Journal Bearing using Ansys." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 2395–400. http://dx.doi.org/10.22214/ijraset.2021.34734.

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In this study Active hydromagnetic journal bearing is designed and analysed by using ANSYS tool. Active Hydromagnetic journal bearing is a combination of Hydrodynamic journal bearing & Active magnetic bearing. We know that hydrodynamic journal bearing used to low speed and high load carrying capacity & its drawback is at high-speed shaft surface is come in contact and there wear also happen. In this condition hydrodynamic bearing also damages from contaminants as dirt or ash, also in the rise in temperature. In the active magnetic bearing is used to high speed and low load carrying cap

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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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Litwin, Wojciech, Artur Olszewski, and Michał Wodtke. "Influence of Shaft Misalignment on Water Lubricated Turbine Sliding Bearings with Various Bush Modules of Elasticity." Key Engineering Materials 490 (September 2011): 128–34. http://dx.doi.org/10.4028/www.scientific.net/kem.490.128.

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Hydropower industry increasingly frequently uses water lubricated bearings in turbines. This stems from the lack of negative impact of such solution on the environment. The paper presents an analysis of the influence of shaft misalignment in a turbine with water lubricated main shaft bearing on its hydrodynamic capacity. The theoretical analysis was based on the results of calculations for experimentally verified elastohydrodynamic lubrication (EHL) model. The obtained results showed impact of the stiffness of bush material and the degree of misalignment on bearing's hydrodynamic capacity.

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