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Relevant bibliographies by topics / Maximum Bearing Pressure

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Journal articles
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Academic literature on the topic 'Maximum Bearing Pressure'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Maximum Bearing Pressure"

1

Martin, F. A. "Dynamically Loaded Journal Bearings: Position of Maximum Pressure Ratio." Journal of Tribology 117, no. 3 (1995): 558–60. http://dx.doi.org/10.1115/1.2831291.

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The position of the maximum “pressure ratio” in dynamically loaded bearings, using short bearing theory, has previously been published only in graphical (map) form. Simple equations are derived here so that this position (relative to the load line) can be obtained directly in numerical form.

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Hirani, H., K. Athre, and S. Biswas. "Dynamically Loaded Finite Length Journal Bearings: Analytical Method of Solution." Journal of Tribology 121, no. 4 (1999): 844–52. http://dx.doi.org/10.1115/1.2834144.

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A closed-form pressure distribution, using a combination of short- and long-bearing approximations, is proposed for dynamically loaded journal bearings. The angles for start and finish of positive pressure curve are determined employing simple analytical equations. The mobility method, based on the suggested pressure distribution is easy to use, predicts results of acceptable accuracy and the execution time is comparable to that required for the short bearing approximation. This paper also provides a conceptually simple analytical method for evaluating angular location of the instantaneous max

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Singla, Amit, and Amit Chauhan. "Experimental study for performance evaluation of steadily loaded true elliptical and orthogonally displaced non-circular journal bearing profiles." Industrial Lubrication and Tribology 68, no. 6 (2016): 702–11. http://dx.doi.org/10.1108/ilt-10-2015-0155.

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Purpose The non-circular journal bearings may be used over circular journal bearings because of their superior thermal stability. The paper aims at experimental study of thermal performance of two different true elliptical and orthogonally displaced non-circular journal bearing profiles. Design/methodology/approach The experiments have been conducted on a specially designed test rig which simultaneously evaluates oil film pressure and temperature along the circumference of non-circular journal bearing. The tests are conducted for the designed true elliptical and orthogonally displaced journal

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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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Bouyer, J., and M. Fillon. "On the Significance of Thermal and Deformation Effects on a Plain Journal Bearing Subjected to Severe Operating Conditions." Journal of Tribology 126, no. 4 (2004): 819–22. http://dx.doi.org/10.1115/1.1792678.

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The present work analyzes the influence of global and local thermal effects and also mechanical and thermal deformations on bearing performance. Local thermal effects are important in the case of a highly loaded bearing because these effects are concentrated within a small zone of the bearing. The thermoelastohydrodynamic study, including deformations due to pressure, leads to a significant decrease in maximum pressure and a slight decrease in maximum temperature. For accurate performance predictions of bearings operating under severe conditions, numerical simulations have to take into account

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Mosher, P., and D. W. Childs. "Theory Versus Experiment for the Effects of Pressure Ratio on the Performance of an Orifice-Compensated Hybrid Bearing." Journal of Vibration and Acoustics 120, no. 4 (1998): 930–36. http://dx.doi.org/10.1115/1.2893922.

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This research investigates the effect of varying the concentric recess pressure ratio of hybrid (combination hydrostatic and hydrodynamic) bearings to be used in high-speed, high-pressure applications. Bearing flowrate, load capacity, torque, rotordynamic coefficients, and whirl frequency ratio are examined to determine the concentric, recess-pressure ratio which yields optimum bearing load capacity and dynamic stiffness. An analytical model, using two-dimensional bulk-flow Navier-Stokes equations and anchored by experimental test results, is used to examine bearing performance over a wide ran

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Gupta, G., C. R. Hammond, and A. Z. Szeri. "An Approximate THD Theory for Journal Bearings." Journal of Tribology 112, no. 2 (1990): 224–29. http://dx.doi.org/10.1115/1.2920245.

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The aim of this paper is to make available to the industrial designer results of the thermohydrodynamic theory of journal bearings, by providing a simplified, yet accurate model of journal bearing lubrication that can be implemented on a personal computer and be used in an interactive mode. The simplified THD theory we propose consists of two coupled ordinary differential equations for pressure and energy and an algebraic equation for viscosity, which are to be solved iteratively. Bearing load capacity, maximum bearing temperature, maximum pressure, coefficient of friction and lubricant flow r

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Zhang, Jun Yan, and Shu Kui Han. "The Analysis of the Deformation and Contact Lubrication Problem of HPD Diesel Engine Piston Pin Bearing Based on the FFT Method." Advanced Materials Research 538-541 (June 2012): 1962–66. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1962.

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Based on the unified Reynolds equation model and fast Fourier transform (FFT) method, the lubrication performance of the piston pin bearing for high power density diesel engine was studied by numerical simulation. First of all, through the coupled solving of a unified Reynolds equation and elastic deformation equation, the influence of the viscous-pressure effect on the maximum film pressure and the minimum oil film thickness for piston pin bearing are investigated. The results show that, after considering the viscosity-pressure effect, the minimum oil film thickness and the maximum film press

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SĘP, Jarosław, Leszek TOMCZEWSKI, and Lidia GAŁDA. "STEADY-STATE ANALYSIS OF JOURNAL BEARINGS WITH HELICAL GROOVES." Tribologia 279, no. 3 (2018): 123–30. http://dx.doi.org/10.5604/01.3001.0012.7020.

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The spiral groove on the sliding journal surface enables the contaminants and eventual wear debris removal from the contact zone and bearing clearance. In this way, the wear and seizure resistance of slide bearings operating in difficult conditions became greater. The presence of a groove on bearing’s surface affects the hydrodynamic performance of the bearing. The aim of the article is to study the load carrying capacity, oil flow rate, and maximum oil temperature and pressure of slide bearings with a spiral groove at different operational conditions. Simulations were realized with the adiaba

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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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Dissertations / Theses on the topic "Maximum Bearing Pressure"

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Verma, Amber. "Influence of Column-Base Fixity On Lateral Drift of Gable Frames." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/42686.

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In a typical light metal building, the structural members are designed for the forces and moments obtained from the wind drift analysis, which assumes pinned connections at the base. The pinned connections provide no moment at the base and have zero rotational stiffness. However, in reality every connection provides some restraint and has some rotational stiffness. Hence, by considering a modeling assumption of pinned condition, the actual behavior of the connection is not captured and this results in overestimation of lateral drifts and appearance of larger moments at the knee of the gable fr

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Book chapters on the topic "Maximum Bearing Pressure"

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Kumar, Sunil, Vijay Kumar, and Anoop Kumar Singh. "Artificial Neural Network Model Development for the Analysis of Maximum Pressure of Hole Entry Journal Bearing Using SciLab." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8304-9_2.

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Fedkin, Valentin V., Theodore D. Burlick, Mary L. Leech, Andrey A. Shchipansky, Peter M. Valizer, and W. G. Ernst. "Petrotectonic origin of mafic eclogites from the Maksyutov subduction complex, south Ural Mountains, Russia." In Plate Tectonics, Ophiolites, and Societal Significance of Geology: A Celebration of the Career of Eldridge Moores. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.2552(09).

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ABSTRACT The Maksyutov complex is a mid- to late-Paleozoic high- to ultrahigh-pressure (HP-UHP) eclogite-bearing subduction zone terrane in the south Ural Mountains. Previous reports of radial fractures emanating from quartz inclusions in garnet, omphacite, and glaucophane, cuboid graphite pseudomorphs after matrix diamond, and microdiamond aggregates preserved in garnet identified by Raman spectroscopy indicate that parts of the complex were subjected to physical conditions of ∼600 °C and &gt;2.8 GPa for coesite-bearing rocks, and &gt;3.2 GPa for diamond-bearing rocks. Peak UHP eclogite-facies metamorphism took place at ca. 385 Ma, and rocks were exhumed through retrograde blueschist-facies conditions by ca. 360 Ma. Bulk analyses of 18 rocks reflect the presence of mid-oceanic-ridge basalt (MORB), oceanic-island basalt (OIB), and island-arc tholeiite (IAT) basaltic and andesitic series plus their metasomatized equivalents. To more fully constrain the petrotectonic evolution of the complex, we computed isochemical phase equilibria models for representative metabasites in the system Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O-TiO2 based on our new bulk-rock X-ray fluorescence (XRF) data. Both conventional Fe-Mg exchange thermometry and phase equilibrium modeling result in higher peak equilibrium temperatures than were previously reported for the complex. Pseudosection analysis provides minimum P-T conditions of 650–675 °C and 2.4–2.6 GPa for peak assemblages of the least retrogressed Maksyutov eclogites, whereas Fe-Mg exchange thermometry yields temperatures of 750 ± 25 °C for a pressure of 2.5 GPa. We interpret our new P-T data to reflect a thermal maximum reached by the eclogites on their initial decompression-exhumation stage, that defines a metamorphic field gradient; the relict coesite and microdiamond aggregates previously reported testify to pressure maxima that define an earlier prograde subduction zone gradient. The eclogitic Maksyutov complex marks underflow of the paleo-Asian oceanic plate and does not represent subduction of the Siberian cratonal margin.

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Conference papers on the topic "Maximum Bearing Pressure"

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Strzelecki, S., H. Kapusta, and J. Swiatek. "Effect of Oil Supply Pressure on the Maximum Oil Film Temperature of 2-Lobe Journal Bearing." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63827.

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Two-lobe journal bearings are applied in the responsible bearing systems of steam turbines, turbogenerators and compressors. As compare to the bearing with the cylindrical bush they have better stability in the range of higher rotational velocities and loads simultaneously assuring very good cooling conditions for the oil film. For the two-lobe journal bearing the oil film pressure, temperature and viscosity distributions have been obtained by iterative solution of the Reynolds’, energy and viscosity equations. An effect of supplied oil pressure on the maximum oil film temperature was investig

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Morais, L., and L. A. Ferreira. "Sensibility Analysis of Design Parameters for Journal Bearings Optimization of Mass Balancing Systems." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63243.

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This work presents a sensibility analysis for the journal bearings of combustion engines mass balancing systems. Applying it, it’s possible to improve the journal bearings and avoid possible failures. This analysis consists on studying the effects of the variation of the journal bearings main parameters (radial clearance, journal bearing diameter and journal bearing length) on the journal bearings operating conditions (minimum film thickness, maximum pressure and power loss). The analysis also includes the comparison and selection of the different metallic materials that can be used in these j

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Mosher, Phillip, and Dara W. Childs. "Theory Versus Experiment for the Effects of Pressure Ratio on the Performance of an Orifice-Compensated Hybrid Bearing." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0507.

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Abstract This research investigates the effect of varying the concentric recess pressure ratio of hybrid (combination hydrostatic and hydrodynamic) bearings to be used in highspeed, high-pressure applications. Bearing flowrate, load capacity, torque, rotordynamic coefficients, and whirl frequency ratio are examined to determine the concentric, recess-pressure ratio which yields optimum bearing load capacity and dynamic stiffness. An analytical model, using two-dimensional bulk-flow Navier-Stokes equations and anchored by experimental test results, is used to examine bearing performance over a

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Khatri, Rasish, Larry Hawkins, Massimiliano Ortiz Neri, Francesco Cangioli, and Davide Biliotti. "Design and Prototype Test Data for a 300 kW AMB-Supported Turbine Generator for Natural Gas Pressure Letdown." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91172.

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Abstract A 300 kW integrated and fully-sealed turbine generator for natural gas pressure letdown (PLD) was developed by Baker Hughes, a GE company (BHGE), in conjunction with Calnetix Technologies. This paper describes the design and analysis of the generator, magnetic bearings, and touchdown bearings, with a focus on the dynamic performance and key characteristics of the machine. The permanent magnetic (PM) synchronous generator is supported by PM-biased, homopolar magnetic bearings and has a maximum continuous operating speed (MCOS) of 31.5 krpm. A touchdown bearing system is implemented usi

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Nakamura, Kyotada, Seitaro Ogiso, Michiaki Suzuki, and K. Umeki. "Development of Double Metal Bellows Air Pressure Spring With Lead Rubber Bearing Type 3-Dimensional Seismic Isolator." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1428.

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A new simple 3-dimensional seismic isolator concept for a commercial fast breeder reactor (FBR) building was proposed. The isolator consists of common reliable industrial parts, metallic bellows and lead rubber bearing (LRB). Air pressurized metallic bellows is for vertical isolation and LRB is for horizontal. The isolation frequencies are 0.5Hz for horizontal and 0.56Hz for vertical respectively. The maximum vertical displacement to absorb is 400mm and the vertical load of 9807kN should be supported per each isolator. A conceptual design was performed for these design requirements and a scale

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Aoki, Shigeru, Yuji Nakanishi, Kazutoshi Tominaga, et al. "Reduction of Seismic Response of Mechanical System by Base Isolation System With Friction Bearing." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26302.

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Reduction of seismic response of mechanical system is important problem for aseismic design. Some types of base isolation systems are developed and used in actual base of buildings and floors in buildings for reduction of seismic response of mechanincal system. In this paper, a base isolation system utilizing bearing with friction and restoring force of bearing is proposed. Friction bearing consists of two plates having spherical concaves and oval type metal or spherical metal with rubber. First, effectiveness of the base isolation system is examined experimentally. Using artificial time histo

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Tamburello, David, Matthew Kesterson, and Steven Hensel. "Thermal Analysis of the 9975 Package Used for Long Term Nuclear Material Storage." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93058.

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Abstract The 9975 is a double containment shipping package used to transport plutonium bearing materials for the US Department of Energy. The 9975 is also used for long term storage of plutonium bearing materials at the Savannah River Site. The package utilizes a fiberboard overpack to protect against fire and impact events. The 9975 has been shown to maintain containment during a hypothetical facility accident fire even though the facility fire is hotter and longer than the regulatory transportation fire. Fiberboard aging and degradation has been investigated using both laboratory and field s

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Gandhi, Bhupendra K., and Sanjeev Bharani. "Pressure Distribution Along the Casing of a Centrifugal Pump and Its Effect on Support Bearing Temperature Distribution." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60002.

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In a centrifugal pump, impeller transfer energy to liquids and a part of the transferred kinetic energy converts into the pressure energy in the surrounding casing. Any asymmetric pressure distribution around the impeller gives rise to radial force, which increases temperature at support bearings of the pump. An effort has been made in the present work to relate rise in the bearing temperature with the pressure distribution around the impeller with and without minor change in its position (by 0.5–1.0 mm) relative to the casing. The maximum bearing temperature is found at full open delivery val

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Lee, Jung Gu, and Alan Palazzolo. "Two Dimensional Modified Reynolds Equation Including Pressure Dependent Viscosity Effect." In ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61174.

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The Reynolds equation plays an important role for predicting pressure distributions for fluid film bearing analysis, One of the assumptions on the Reynolds equation is that the viscosity is independent of pressure. This assumption is still valid for most fluid film bearing applications, in which the maximum pressure is less than 1 GPa. However, in elastohydrodynamic lubrication (EHL) where the lubricant is subjected to extremely high pressure, this assumption should be reconsidered. The 2D modified Reynolds equation is derived in this study including pressure-dependent viscosity, The solutions

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Basavaraju, Chakrapani, and Ronald C. Fox. "Relaxed Hanger Spans for Non-Critical Piping." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-2181.

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Piping systems are normally used to transport air, gases, steam, water, and other fluids. Piping systems in power plants, petro-chemical, and other industrial facilities that carry non-hazardous fluids like air, water, etc. with no significant pressures at moderate temperatures can be considered as non-critical. Codes such as ASME B31.1 provide suggested dead weight spans for the placement of supports. In this paper, relaxed hanger spans are computed for non-safety related piping systems taking in to consideration the maximum bending stress, maximum deflection or pipe sag, and bearing stresses

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