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Journal articles on the topic 'Thrust Bearings'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 May 2022

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1

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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2

Li, Xibing, Weixiang Li, Xueyong Chen, Ming Li, Huayun Chen, and Xin Yue. "Design and performance analysis on heat pipe hydrostatic thrust bearings based on rectangular oil pad." Industrial Lubrication and Tribology 70, no. 7 (2018): 1251–57. http://dx.doi.org/10.1108/ilt-10-2017-0303.

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Purpose The purpose of this paper is to examine the effect of application of a heat pipe in an aspect of hydrostatic thrust bearings on thermal balance and deformation and the role of this application in increasing the rotating speed of a workbench. Design/methodology/approach Numerical simulations of oil film temperature field, the temperature field and thermal deformation of the bearing’s workbench and base were performed by finite element analysis (FEA) software for both the traditional hydrostatic thrust bearings and the heat pipe ones. Findings Oil pad and workbench of the hydrostatic thr

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3

Sahto, Muhammad Punhal, Wei Wang, Ali Nawaz Sanjrani, Chengxu Hao, and Sadiq Ali Shah. "Dynamic Performance of Partially Orifice Porous Aerostatic Thrust Bearing." Micromachines 12, no. 8 (2021): 989. http://dx.doi.org/10.3390/mi12080989.

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The aerostatic thrust bearing’s performance under vibration brings certain changes in stiffness and stability, especially in the range of 100 to 10,000 Hz, and it is accompanied by significant increase in fluctuations due to the changes in frequency, and the size of the gas film damping. In this research work, an analysis is carried out to evaluate the impact of throttling characteristics of small size orifice on stiffness and stability optimization of aerostatic thrust bearings. There are two types of thrust bearing orifices such as: partial porous multiple orifice and porous thrust bearings

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4

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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5

Murdzia, Edward, and Stanisław Strzelecki. "CALCULATIONS OF TILTING-PAD THRUST BEARINGS." Tribologia 298, no. 4 (2022): 27–36. http://dx.doi.org/10.5604/01.3001.0015.8366.

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The application of thrust bearings in different engineering designs generates problems of thermal state, which generates the wear of the fixed or tilting pads of bearings. These problems can be avoided by means of proper methods and numerical algorithms of calculations of the bearing static characteristics, including the maximum oil film temperature. The knowledge of thermal state of bearings should assure safe, reliable, and durable bearing operation and is important for the designers of thrust bearings. This paper presents the results of calculations of some static characteristics of a tilti

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6

Zhu, Jiasheng, and Kyosuke Ono. "A Comparison Study on the Performance of Four Types of Oil Lubricated Hydrodynamic Thrust Bearings for Hard Disk Spindles." Journal of Tribology 121, no. 1 (1999): 114–20. http://dx.doi.org/10.1115/1.2833790.

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In this paper, the static and dynamic performance of herringbone, step-pocket, taper-pocket, and taper-flat thrust bearings were numerically analyzed. Optimal values for the design parameters of each type of bearing were analyzed in terms of both maximum axial stiffness (kzz) and maximum ratio of axial stiffness to friction torque (kzz/T) and bearing performance for both cases was calculated. The optimal performance characteristics of these bearings were compared in terms of application to hard disk spindles. Step-pocket and taper-pocket thrust bearings are superior to herringbone and taper-fl

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7

Zhou, Quan, Yu Hou, and Ru Gang Chen. "Application of Materials on Foil Thrust Bearings for Micro Turbines." Advanced Materials Research 201-203 (February 2011): 2759–62. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2759.

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Foil bearing that has a soft surface is a kind of air bearing. The performances of foil bearings are greatly affected by the materials of bearing surface, which is called foil element. In order to estimate the performance of foil bearings, two kinds of foil thrust bearings that are made of different materials respectively were tested in a micro turbine system, which contains rotation part and static part. Load capacity and stability of these foil thrust bearings were investigated in experiments. The results show that bearing which contains rubber has higher load capacity and bearing which cont

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8

Teo, C. J., and Z. S. Spakovszky. "Analysis of Tilting Effects and Geometric Nonuniformities in Micro-hydrostatic Gas Thrust Bearings." Journal of Turbomachinery 128, no. 4 (2005): 606–15. http://dx.doi.org/10.1115/1.2219761.

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The Massachusetts Institute of Technology (MIT) microengine rotors are supported by hydrostatic gas journal and hydrostatic gas thrust bearings. Due to the low length-to-diameter ratio of the devices, the thrust bearings play an important role in providing sufficient tilting stiffness to resist any tilting motion about the spinning axis of the rotor. The performance of the thrust bearings can be influenced by geometric nonuniformities such as thrust-bearing clearances and orifice diameters, and profiles which arise in the process of micro-fabrication. To enable stable high speed operation of t

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9

Zhou, Quan, Yu Hou, and Ru Gang Chen. "Development of Foil Thrust Bearings with Simple Structure for Micro Turbines." Advanced Materials Research 368-373 (October 2011): 1392–95. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.1392.

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Because of the low power loss and high stability, foil bearings are suitable lubrication components for high speed rotational systems. At present, the foil bearings used in actual applications almost have complicated structure and are hard to manufacture. In this paper, two kinds of foil thrust bearings with simple structure are presented. Configurations of these two foil thrust bearings are introduced; meanwhile, the load capacity and running stability are also tested in a high speed micro turbine. It is shown that viscoelastic supported foil thrust bearing has higher load capacity and hemisp

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10

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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11

Teo, C. J., and Z. S. Spakovszky. "Modeling and Experimental Investigation of Micro-hydrostatic Gas Thrust Bearings for Micro-turbomachines." Journal of Turbomachinery 128, no. 4 (2005): 597–605. http://dx.doi.org/10.1115/1.2219760.

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One major challenge for the successful operation of high-power-density micro-devices lies in the stable operation of the bearings supporting the high-speed rotating turbomachinery. Previous modeling efforts by Piekos (2000, “Numerical Simulation of Gas-Lubricated Journal Bearings for Microfabricated Machines,” Ph.D. thesis, Department of Aeronautics and Astronautics, MIT), Liu et al. (2005, “Hydrostatic Gas Journal Bearings for Micro-Turbo Machinery,” ASME J. Vib. Acoust., 127, pp. 157–164), and Spakovszky and Liu (2005, “Scaling Laws for Ultra-Short Hydrostatic Gas Journal Bearings,” ASME J.

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12

Wang, Xin Rong, Xiao Hai Li, Ya Chao Cui, and Li Hua Yang. "Design of Main Pump Motor’s Water Lubricated Bearing and Research on its Lubrication Performances." Advanced Materials Research 538-541 (June 2012): 1971–74. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1971.

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Water-lubricated thrust bearing is a key component of certain main pump motor. In this paper, the right structure of water-lubricated thrust graphite bearings is designed based on low viscosity hydrodynamic lubrication theory by combining the bearings running working condition, and the frictional accessory material is also determined by theoretical analysis and test. The factors influencing lubrication performances of water-lubricated thrust bearings are analyzed; the methods improving lubrication performances are put forward to guarantee that water-lubricated thrust graphite bearings have the

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13

Lie, Yu, and R. B. Bhat. "Coupled Dynamics of a Rotor-Journal Bearing System Equipped with Thrust Bearings." Shock and Vibration 2, no. 1 (1995): 1–14. http://dx.doi.org/10.1155/1995/602701.

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The rotordynamic coefficients of fixed-pad thrust bearing are introduced and calculated by using the out-domain method, and a general analysis method is developed to investigate the coupled dynamics of a rotor equipped with journal and thrust bearings simultaneously. Considerations include the effects of static tilt parameters of the rotor on rotordynamic coefficients of thrust bearing and the action of thrust bearing on system dynamics. It is shown that thrust bearing changes the load distribution of journal bearings and the static deflection of the rotor and delays the instability of the sys

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14

JOHNSON, ROBERT E., and NOAH D. MANRING. "Translating circular thrust bearings." Journal of Fluid Mechanics 530 (May 10, 2005): 197–212. http://dx.doi.org/10.1017/s0022112005003782.

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15

Iordanoff, I., P. Stefan, R. Boudet, and D. Poirier. "Dynamic Analysis of a Thrust Bearing—Effect of Misalignment and Load." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 209, no. 3 (1995): 189–94. http://dx.doi.org/10.1243/pime_proc_1995_209_424_02.

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The ABG SEMCA, specialists in air-conditioning machinery, has considered the concept of small turbines with high rotation speeds (50 000–80 000 r/min). Air radial and thrust bearings are particularly well adapted for this kind of turbine. The load on the thrust bearing can be directed on one way or en the other. Therefore two thrust bearings are needed in order to support a bidirectional load However, some problems of stability have been found in the non-loading thrust bearing. This paper deals with a dynamic analysis of a thrust bearing and outlines the bad effects of misalignment on the unlo

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16

Pettinato, B. C., and P. DeChoudhury. "Rotordynamic and Bearing Upgrade of a High-Speed Turbocharger." Journal of Engineering for Gas Turbines and Power 125, no. 1 (2002): 95–101. http://dx.doi.org/10.1115/1.1519273.

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The paper discusses the redesign of a high-speed turbocharger for improved bearing life and mechanical operation. The bearings were changed from a pair of combination journal/thrust bearings to a pair of redesigned journal bearings with double acting thrust bearing at the center of the unit. Internal oil passages, drain cavities, and seals were also revised. These modifications resulted in reduced oil leakage across end seals, reduced coke buildup at the turbine, increased thrust load capacity, and improved rotordynamics. Both the analytical and experimental results, which consisted of bearing

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17

Allaire, P. E., E. H. Maslen, D. W. Lewis, and R. D. Flack. "Magnetic Thrust Bearing Operation and Industrial Pump Application." Journal of Engineering for Gas Turbines and Power 119, no. 1 (1997): 168–73. http://dx.doi.org/10.1115/1.2815543.

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Magnetic bearings represent a new bearing technology, which has some advantages over conventional fluid film and wiling element bearings for some applications. The paper describes the basic concepts of magnetic thrust bearing operation involving the magnetic actuator, electronic controls, power amplifier, and sensor. The magnetic actuator is a magnetic circuit, which generates attractive forces. These support the rotating shaft. While it is often thought that magnetic bearings are highly nonlinear devices, this paper demonstrates that they are linear in both the perturbation flux and current w

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18

Martsinkovsky, V., V. Yurko, V. Tarelnik, and Yu Filonenko. "Designing Thrust Sliding Bearings of High Bearing Capacity." Procedia Engineering 39 (2012): 148–56. http://dx.doi.org/10.1016/j.proeng.2012.07.019.

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19

Khan, Polina V., Dawit Zenebe Segu, and Pyung Hwang. "The effect of the arc on annular-thrust aerostatic porous bearings." Industrial Lubrication and Tribology 69, no. 6 (2017): 925–29. http://dx.doi.org/10.1108/ilt-12-2016-0310.

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Purpose Aerostatic porous bearings are important for guide rails and spindles. It is well-known that flow restrictors made of porous materials offer major advantages over conventional restrictors in such bearings, including design and manufacturing, load-carrying capacity, stiffness, damping and dynamic stability. Thus, this work numerically investigates the effect of the arc on a new combined annular-thrust aerostatic porous bearing. Design/methodology/approach The static characteristics of an annular-thrust aerostatic porous bearing were studied using a fast finite element scheme. The pressu

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20

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

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

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21

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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22

KORNEYEV, А. Yu, A. V. SYTIN, А. V. KUZAVKA, and E. V. MISHCHENKO. "THE MATHEMATICAL MODEL OF CALCULATION OF THE THRUST CONICAL FOIL BEARINGS." Fundamental and Applied Problems of Engineering and Technology 3 (2020): 3–10. http://dx.doi.org/10.33979/2073-7408-2020-341-3-3-10.

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The question of creating a unified method of calculation for the thrust and conical part of the combined thrust conical foil bearings. Mathematical model for calculating the turbulent flow of a lubricant in the conical and thrust parts of foil bearings. The design of the bearing and foil, the function of the gap in the lubricant layer of the bearing, the Reynolds equation and the equation of deformations of elastic elements are presented.

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23

Martsynkovskyy, Vasyl, and Volodymyr Yurko. "Solutions for Increasing the Bearing Capacity of Thrust Bearings." Applied Mechanics and Materials 630 (September 2014): 208–19. http://dx.doi.org/10.4028/www.scientific.net/amm.630.208.

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Design faults, imperfect manufacturing processes, change of technological operating modes of the turbocompressors in gas, petroleum, chemical and petrochemical industry cause axial rotor shifts. Therefore, the task of manufacturing the high-efficient and reliable thrust bearings is important nowadays along with effective rotor balancing, methods of axial forces calculation considering possible operating modes, improvement of static electricity elimination system, protective and monitoring systems of the axial shift. Effective methods for increasing the bearing capacity of thrust bearings, appl

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24

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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25

Constantinescu, V. N., and S. Galetuse. "Stability Criterion for Spiral Grooved Thrust Gas Bearings." Journal of Tribology 112, no. 4 (1990): 734–37. http://dx.doi.org/10.1115/1.2920322.

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A previous analysis of dynamic stability for a blocked center inward pumping spiral grooved thrust gas bearing is extended to two other types of similar bearings, namely annular thrust bearings with either inward or outward pumping. Both a numerical small perturbation analysis and an analytical procedure are used, the latter one being based on an approximate shape of the pressure distribution. The analysis provides a critical compressibility number up to which the bearings is unconditionally stable.

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26

Glavatskih, Sergei B. "Evaluating Thermal Performance of a PTFE-Faced Tilting Pad Thrust Bearing." Journal of Tribology 125, no. 2 (2003): 319–24. http://dx.doi.org/10.1115/1.1506329.

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This paper compares and analyses operating characteristics of equalizing tilting pad thrust bearings with babbitt and polytetrafluoroethylene (PTFE) composite facings. Each bearing arrangement included six pads with an outer diameter of 228.6 mm and 60 percent offset. The babbitted bearing was typical of design in general use. A PTFE composite was applied instead of the babbitt to a similar bearing. Bearings were tested at different load-speed combinations in the fully flooded mode. Pad temperature distributions, collar temperatures and bearing friction torque were continuously measured. Test

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27

Jimboh, K., H. Aono, T. Chikata, Y. Hagiwara, K. Nakasu, and T. Hoshino. "Thrust Load Measurement on Aero-Engine Bearing." Journal of Engineering for Gas Turbines and Power 107, no. 1 (1985): 181–86. http://dx.doi.org/10.1115/1.3239680.

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Aero-engine bearings operate in an extraordinarily high speed range (high DN number) and severe conditions. It is especially necessary to measure and adjust the bearing thrust load in the engine development phase, but it is very difficult to measure the thrust load accurately, because bearings and bearing housings are subjected to elevated temperature and oil environment. Open space permitted for installation of thrust measurement transducers is small and limited around the bearing housing. We tried to measure the thrust load by applying “Unit Cells,” which are installed between bearing and be

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28

Allaire, P. E., R. L. Fittro, E. H. Maslen, and W. C. Wakefield. "Measured Force/Current Relations in Solid Magnetic Thrust Bearings." Journal of Engineering for Gas Turbines and Power 119, no. 1 (1997): 137–42. http://dx.doi.org/10.1115/1.2815537.

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When magnetic bearings are employed in a pump, compressor, turbine, or other rotating machine, measurement of the current in the bearing coils provides knowledge of the forces imposed on the bearings. This can be a significant indicator of machine problems. Additionally, magnetic bearings can be utilized as a load cell for measuring impeller forces in test rigs. The forces supported by magnetic bearings are directly related to the currents, air gaps, and other parameters in the bearings. This paper discusses the current/force relation for magnetic thrust bearings. Force versus current measurem

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29

Wang, Lei, Chong Gao, Shi Jie Wang, Jing Zhao, and Li Li. "Finite Element Analysis of Thrust Bearing in ESPCP System." Advanced Materials Research 781-784 (September 2013): 2834–38. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2834.

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Thrust bearing is one of the most important components in ESPCP system, which determines the life of the whole system under the restriction of some factors such as the installation depth and the viscosity of swabbed petroleum oil etc. To increase the ability of high temperature resistance of thrust bearings under the limited radial size, the damage reason of applied bearings was analyzed. Some different modified methods were employed on configuration and material. Contact problems were researched with finite element analysis software. Comparison of the analysis results shows that in the tube,

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30

Walicka, A., P. Jurczak, and J. Falicki. "Inertia and Couple-Stress Effects in a Curvilinear Thrust Hydrostatic Bearing." International Journal of Applied Mechanics and Engineering 22, no. 3 (2017): 759–67. http://dx.doi.org/10.1515/ijame-2017-0048.

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AbstractThe flow of a couple-stress lubricant in a clearance of a curvilinear thrust hydrostatic bearing with impermeable walls is considered. The flow in the bearing clearance is considered with inertia forces. The equations of motion are solved by an averaged inertia method. As a result, the formulae for pressure distributions without and with inertia effects were obtained. Radial thrust bearings and spherical bearings are discussed as numerical examples. It is shown that inertia effects influence the bearing performance considerably.

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31

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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32

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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33

van Beek, A., and A. Segal. "Rubber supported hydrostatic thrust bearings with rigid bearing surfaces." Tribology International 30, no. 1 (1997): 47–52. http://dx.doi.org/10.1016/0301-679x(96)00021-7.

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Gad, Abdelrasoul M. "On the performance of foil thrust bearing with misaligned bearing runner." Industrial Lubrication and Tribology 69, no. 2 (2017): 105–15. http://dx.doi.org/10.1108/ilt-11-2015-0177.

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Purpose Compliant foil thrust bearings are promising bearings for high-speed oil-free turbomachinery. However, most previous experimental and numerical approaches to investigate the performance of these bearings have ignored the effect of bearing runner misalignment. Therefore, this paper aims to evaluate the effects of static and dynamic angular misalignments of the bearing runner on the performance of a gas-lubricated foil thrust bearing. Design/methodology/approach The bearing runner is allowed a maximum angular misalignment that produces a minimum gas film thickness as low as 20 per cent o

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35

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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36

San Andre´s, Luis. "Effects of Misalignment on Turbulent Flow Hybrid Thrust Bearings." Journal of Tribology 124, no. 1 (2001): 212–19. http://dx.doi.org/10.1115/1.1400997.

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An extended computational bulk-flow analysis for prediction of performance in angled injection, orifice-compensated hydrostatic/hydrodynamic thrust bearings is presented. The fluid motion within the thin film lands is governed by mass conservation and momentum transport equations. Mass flow conservation and a simple model for momentum transport within the hydrostatic bearing recesses are also accounted for. A perturbation analysis for small amplitude shaft axial motions and angulations leads to zeroth and first-order equations describing the equilibrium and perturbed fluid flows. The computati

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37

HASHIMOTO, Hiromu, and Sanae WADA. "Pressure boundary conditions for high speed thrust bearings. (1st report Infinitely long thrust bearings)." Transactions of the Japan Society of Mechanical Engineers Series C 52, no. 483 (1986): 2925–33. http://dx.doi.org/10.1299/kikaic.52.2925.

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HASHIMOTO, Hiromu, Sanae WADA, and Tadashi YOSHIDA. "Pressure boundary conditions for high speed thrust bearings. 2nd report. Finite width thrust bearings." Transactions of the Japan Society of Mechanical Engineers Series C 54, no. 505 (1988): 2228–36. http://dx.doi.org/10.1299/kikaic.54.2228.

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39

Xu, Xiao Qiu, Jun Peng Shao, Xiao Dong Yang, Yan Qin Zhang, Xiao Dong Yu, and Bing Wei Gao. "Simulation on Multi-Oil-Cavity and Multi-Oil-Pad Hydrostatic Bearings." Applied Mechanics and Materials 274 (January 2013): 274–77. http://dx.doi.org/10.4028/www.scientific.net/amm.274.274.

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Taking multi-oil-cavity and multi-oil-pad hydrostatic bearings as studied projects, firstly make brief instructions for structure characteristics and working principal of hydraulic system; Then, build three-dimensional models of multi-oil-cavity and multi-oil-pad hydrostatic bearings respectively. Adopting finite volume method, oil film mesh is generated by universal finite analysis software CFD; then, carry on numerical simulations for pressure distribution and temperature distribution of the two studied hydrostatic thrust bearing under various viscosity, and make comparative analysis for dif

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40

Hong, Yao Yao, Li Jun Du, and She Miao Qi. "Numerical Simulation of Oil Film State and Mechanical Performance of Heavy Hydrostatic Thrust Bearings." Applied Mechanics and Materials 318 (May 2013): 148–52. http://dx.doi.org/10.4028/www.scientific.net/amm.318.148.

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The finite element method (FEM) is applied in the numerical simulation of heavy hydrostatic thrust bearings to study the influence of pressure and temperature on bearing deformation. The pressure distribution and the temperature distribution are obtained by solving the Reynolds equation and the energy equation. The bearing deformations caused by temperature and pressure are computed by imposing the two obtained distributions on the bearing. Because the pressure distribution and the temperature distribution are influenced by the oil film thickness and the oil film thickness is influenced by the

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Zhai, Liming, Zhengwei Wang, Yongyao Luo, and Zhongjie Li. "TEHD analysis of a bidirectional thrust bearing in a pumped storage unit." Industrial Lubrication and Tribology 68, no. 3 (2016): 315–24. http://dx.doi.org/10.1108/ilt-07-2015-0092.

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Purpose The purpose of this paper is to analyze lubrication characteristics of a bidirectional thrust bearing in a pumped storage, considering the effect of the thermal elastic deformation of the pad and collar. Design/methodology/approach This study used the fluid–solid interaction (FSI) technique to investigate the lubrication characteristics of a bidirectional thrust bearing for several typical operating conditions. The influences of the operating conditions and the thrust load on the lubrication characteristics were analyzed. Then, various pivot eccentricities were investigated to analyze

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Ziebell, Arne, Oskar Schöppl, Roland Haubner, and Thomas Konegger. "Identification of Bearing Defects in Hybrid Thrust Ball Bearings by Vibration Analysis." Materials Science Forum 825-826 (July 2015): 844–51. http://dx.doi.org/10.4028/www.scientific.net/msf.825-826.844.

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Hybrid ball bearings, consisting of metallic washers in combination with ceramic bearing balls, feature a variety of significant advantages in comparison to standard steel bearings, including mechanical properties and reduced friction during operation. Key aspects for a successful operation are a prevention of defects of both balls and washers, as well as the knowledge of critical and optimal operation parameters. This relevant information can be obtained through test rig trials, where vibration analysis has found to be a versatile and efficient tool for the characterization of the operational

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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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Feng, Huihui, and Shuyun Jiang. "Dynamic analysis of water-lubricated motorized spindle considering tilting effect of thrust bearing." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 20 (2016): 3780–90. http://dx.doi.org/10.1177/0954406216652437.

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The dynamic modeling for the rotor with large diameter thrust bearings is one of the key issues in the design and operation of water-lubricated motorized spindle. In the machining process, the spindle not only translates along the x, y, z directions, but also tilts about the x and y axes under the cutting forces. As a result, the tilting effect of the thrust bearing on the dynamic performances of the motorized spindle should be considered. A five degree-of-freedom dynamic model for the spindle is established based on the Newton’s Laws and the principle of Angular Momentum. The translational an

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Babin, Alexander, Leonid Savin, and Sergey Majorov. "Dynamic Characteristics of Rotors on Passive and Active Thrust Fluid-film Bearings with Fixed Pads." MATEC Web of Conferences 148 (2018): 11003. http://dx.doi.org/10.1051/matecconf/201814811003.

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Application of fluid-film bearings in rotor machines in many cases could have no alternative due to obvious advantages when compared to roller element bearings. Integration of information technology in mechanical engineering resulting in emergence of a new field of research – mechatronic bearings which allowed tracking condition of the most important parts of a machine and adjusting operational parameters of the system. Application of servo valves to control the flow rate through a fluid-film bearing is the most universal and simple way of rotor’s position control due to relative simplicity of

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Yang, Shifu, Wenbin Zheng, Mulong Jiang, Shiyuan Pei, and Hua Xu. "A comparative experimental study on large size center and bi-directional offset spring-bed thrust bearing." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 234, no. 1 (2019): 134–44. http://dx.doi.org/10.1177/1350650119855241.

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The central support tilting thrust bearing is widely used in the motor-generator unit, and the central support tilting thrust bearing performs poorly compared with the offset bearing. In order to improve the performance of the thrust bearing capable of the bidirectional operation, a spring-supported switching tilting thrust bearing was designed, which could run under offset condition at both clockwise and counterclockwise. In order to verify the reliability of the bearing, we designed a true size thrust bearing test bench and measured the performance parameters of the temperature, pressure, oi

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El-Saie, Y. M. H. Ali, and R. T. Fenner. "Three-Dimensional Thermoelastohydrodynamic Analysis of Pivoted Pad Thrust Bearings Part 2: Application of Theory and Comparison with Experiments." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 202, no. 1 (1988): 51–62. http://dx.doi.org/10.1243/pime_proc_1988_202_085_02.

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In Part 1, a computational method was described for predicting the performance of pivoted pad thrust bearings. In this second part, computed results are compared with experimental data. Three test cases are considered, which cover the range of bearing sizes normally encountered in practice, from a 150 mm diameter laboratory scale experiment through the main propulsion thrust bearings of a destroyer to a 3 m diameter bearing. Generally good agreement is obtained for both temperatures and film thicknesses.

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Nakao, Yohichi, Kenji Suzuki, Kohei Yamada, and Kohei Nagasaka. "Feasibility Study on Design of Spindle Supported by High-Stiffness Water Hydrostatic Thrust Bearing." International Journal of Automation Technology 8, no. 4 (2014): 530–38. http://dx.doi.org/10.20965/ijat.2014.p0530.

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The machining accuracy of ultra-precision machine tools relies on the performance of the spindle and linear table. The machining accuracy of ultra-precision machine tools is now at the level of several tens of nanometers. In order for ultra-precision machine tools to achieve machining accuracy, a precise spindle system is indispensible. High bearing stiffness is particularly important to minimize displacement due to the cutting force. This paper considers a spindle design supported by high-stiffness water hydrostatic thrust bearings. An objective of this study is to design a precision spindle

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Nihon’yanagi, Hiroya, Takahiro Matsueda, Katsuyuki Kida, and Yuji Kashima. "Contact Temperature Calibration of PPS Thrust Bearings under Dry Condition." Materials Science Forum 1020 (February 2021): 131–35. http://dx.doi.org/10.4028/www.scientific.net/msf.1020.131.

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In the present study, Rolling Contact Fatigue (RCF) tests of Poly-phenylene-sulfide (PPS) thrust bearings under dry condition were carried out and the relationship between fatigue life of bearings and temperature was studied. Furthermore, in order to investigate maximum temperature of PPS thrust bearings in service, in order to obtain the calibration data, the temperatures of rolling contact element and Infrared (IR) temperature on the side of top race were measured and correlated. It is concluded that the contact temperature of failure PPS bearing was higher than the glass transition point bu

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Kumar, Vivek, and Satish C. Sharma. "Magneto-hydrostatic lubrication of thrust bearings considering different configurations of recess." Industrial Lubrication and Tribology 71, no. 7 (2019): 915–23. http://dx.doi.org/10.1108/ilt-10-2018-0370.

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Purpose This paper aims to numerically investigate the influence of magnetic field and recess configurations on performance of hydrostatic thrust bearing. Electrically conducting fluid is supplied to bearing, operating in external magnetic field. Influences of recess geometric shapes (circular, rectangular, elliptical and triangular) and restrictor (capillary and orifice) are numerically examined on stead-state and dynamic performance characteristics of bearing. Design/methodology/approach Numerical simulation of hydrostatic thrust bearing has been performed using finite element (FE) method ba

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