Thematische Bibliographien / Bearing lubrication

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Auswahl der wissenschaftlichen Literatur zum Thema „Bearing lubrication“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Bearing lubrication"

Li, Song Sheng, Zhi Hong Hu, Peng Zhou, Peng Chen, Xiao Yang Chen, Jia Ming Gu und Li Xia Fu. „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, the axial preload, the oil viscidity, the design contact angle of bearing, and the ball materials and so on are analyzed on the heating performances in a bearing. The results show that it is easy to come into being elasto-hydrodynamic lubrication state for a bearing running in an ultra high-speed and lubricated by oil-air. It is also shown that the higher speed is, the more the quality of heat produced inside the oil films in the elasto-hydrodynamic lubrication state will be, which will bring the bearings working conditions worse.

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Bao, Heyun, Xiaonan Hou, Xin Tang und Fengxia Lu. „Analysis of temperature field and convection heat transfer of oil-air two-phase flow for ball bearing with under-race lubrication“. Industrial Lubrication and Tribology 73, Nr. 5 (13.07.2021): 817–21. http://dx.doi.org/10.1108/ilt-03-2021-0067.

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Purpose Under-race lubrication can increase the amount of lubricating oil entering a bearing and greatly improve lubrication and cooling effects. The oil-air two-phase flow and heat transfer characteristics inside a ball bearing with under-race lubrication play a key role in lubrication and cooling performance. The purpose of this paper is to study these two characteristics, and then provide guidance for lubrication and heat dissipation of bearing with under-race lubrication. Design/methodology/approach In this paper, a simplified three-dimension heat transfer model of ball bearing with under-race lubrication is established; the coupled level set volume of fluid method is used to track the oil-air two-phase flow, and the Palmgren method is used to calculate the heat generation. The influence of rotation speed and inlet velocity on oil volume fraction, temperature and convection heat transfer is investigated. A temperature test for under-race lubrication is carried out. Findings Because of the centrifugal force, lubricating oil is located more on the outer ring raceway. As the rotation speed decreases and the inlet velocity increases, the oil volume fraction increases and the temperature decreases. Furthermore, the area with high oil volume fraction has a large convection heat transfer coefficient and low temperature. The error between the simulation temperature and the test temperature is within 10%. Originality/value The research on the temperature field and convection heat transfer characteristics of under-race lubrication ball bearings at different rotation speeds and inlet velocities is rarely involved.

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Sun, Jun, Xinlong Zhu, Liang Zhang, Xianyi Wang, Chunmei Wang, Hu Wang und Xiaoyong Zhao. „Effect of surface roughness, viscosity-pressure relationship and elastic deformation on lubrication performance of misaligned journal bearings“. Industrial Lubrication and Tribology 66, Nr. 3 (08.04.2014): 337–45. http://dx.doi.org/10.1108/ilt-12-2011-0110.

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Purpose – Current lubrication analyses of misaligned journal bearings were generally performed under some given preconditions. To make the lubrication analysis closer to the actual situation and usable to the journal bearing design, the purpose of this paper was to calculate the lubrication characteristics of misaligned journal bearings considering the viscosity-pressure effect of the oil, the surface roughness and the elastic deformation of the journal bearing at the same time. Design/methodology/approach – The lubrication of bearings was analyzed using the average Reynolds equation. The deformation of the bearing surface under oil film pressure was calculated by a compliance matrix method. The compliance matrix was established by finite element analysis of the bearing housing. The viscosity-pressure and viscosity–temperature equations were used in the analysis. Findings – The oil viscosity-pressure relationship has a significant effect on the lubrication of misaligned journal bearings. The surface roughness will affect the lubrication of misaligned journal bearings when the eccentricity ratio and angle of journal misalignment are all large. The directional parameter of the surface has an obvious effect on the lubrication of misaligned journal bearings. The deformation of the bearing surface has a remarkable effect on the lubrication of misaligned journal bearings. Originality/value – The lubrication characteristics of misaligned journal bearings were calculated considering the viscosity-pressure effect of the oil, the surface roughness and the elastic deformation of the journal bearing at the same time. The results of this paper are helpful to the design of the bearing.

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Kingsbury, E. „Parched Elastohydrodynamic Lubrication“. Journal of Tribology 107, Nr. 2 (01.04.1985): 229–32. http://dx.doi.org/10.1115/1.3261026.

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A parched subregime of elastohydrodynamic lubrication is proposed, lying between starved and mixed. Parched EHL is necessary to describe instrument ball bearing behavior, for example: long term transients in film thickness. A parched bearing has the least driving torque demand and best spin axis definition possible from any lubrication regime. Some measurements made in a 40 mm bore bearing show that parched operation is not limited to small bearings.

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CZABAN, Adam. „CFD ANALYSIS OF THE HYDRODYNAMIC LUBRICATION OF A MISALIGNED, SLIDE CONICAL BEARING“. Tribologia 268, Nr. 4 (31.08.2016): 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 misalignment on the hydrodynamic pressure distribution in the conical sliding bearing lubrication gap and on the bearing load carrying capacity and friction force values. This paper shows the result of a CFD simulation of hydrodynamic conical bearings lubrication with the assumption that the bearings are misaligned, i.e. where the rotation axis of bearing shaft is not parallel to the axis of the cone of the bearing sleeve. The commercial CFD software ANSYS Fluent was used in this research. It was assumed that the flow of lubricating oil is laminar, without slipping on bearing surfaces, and that the oil has non-Newtonian properties.

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Pratama, Edward Rangga, und Alaya Fadllu Hadi Mukhammad. „Bearing Failure Analysis on Gearbox Forced Draft Fan at LNG Plant“. Indonesian Journal of Science and Technology 3, Nr. 2 (30.08.2018): 124. http://dx.doi.org/10.17509/ijost.v3i2.12756.

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Boilers Forced Draft Fan has a gearbox reducer to reduce speed from steam turbine as a driver and fan as the driven. Based on Predictive Maintenance Group at Machinery and Heavy Equipment Section, it was found that gearbox has high vibration and noise when boilers load on 195 Ton/Hr (Max Load 295 Ton/hr). Vibration Analysis indicates that the source of vibration comes from bearings with peak value 0.572 in/sec at gearbox high speed outboard vertical and 0.593 in/sec at gearbox high speed outboard horizontal (Max Allowance 0.50 in/sec). Lubrication analysis using X-ray Flourescence method, to see wear particle on lubricating oil showed that Tin(Sn) content is very high 203.62 mg/L (maximum allowance for Tin(Sn) at gearbox is 20mg/L), but wear debris are not found in lubricating oil. Gearbox disassembly found that high speed and low speed bearings suffered severe corrosion. Corrosion at bearings are caused by water contamination on lubrication oil, it comes from steam leak due to carbon ring failure at steam turbine which is steam turbine bearing lubrication and gearbox lubrication get into one lubrication system. After Bearings replaced with a new one, vibration analysis shown improved vibration conditions 0.084 in/sec at gearbox high speed outboard vertical and 0.066 in/sec at gearbox high speed outboard horizontal. In conclucion, high vibration and noise at gearbox reducer were caused by bearings failure due to severe corrosion, and water contamination on lubrication oil for gearbox due to carbon ring failure on steam turbine.

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Jin, Z. M., D. Dowson und J. Fisher. „Analysis of fluid film lubrication in artificial hip joint replacements with surfaces of high elastic modulus“. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 211, Nr. 3 (01.03.1997): 247–56. http://dx.doi.org/10.1243/0954411971534359.

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Lubrication mechanisms and contact mechanics have been analysed for total hip joint replacements made from hard bearing surfaces such as metal-on-metal and ceramic-on-ceramic. A similar analysis for ultra-high molecular weight polyethylene (UHMWPE) against a hard bearing surface has also been carried out and used as a reference. The most important factor influencing the predicted lubricating film thickness has been found to be the radial clearance between the ball and the socket. Full fluid film lubrication may be achieved in these hard/hard bearings provided that the surface finish of the bearing surface and the radial clearance are chosen correctly and maintained. Furthermore, there is a close relation between the predicted contact half width and the predicted lubricating film thickness. Therefore, it is important to analyse the contact mechanics in artificial hip joint replacements. Practical considerations of manufacturing these bearing surfaces have also been discussed.

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Qiu, Jun Peng, Mei Yin und Ling Song Guo. „Lubrication Mode and Selection of the Helicopter Transmission System Roller Bearing“. Applied Mechanics and Materials 86 (August 2011): 156–61. http://dx.doi.org/10.4028/www.scientific.net/amm.86.156.

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The bearings will directly affect the performance of helicopter transmission system whether they are in normal work or not. Lubrication is the essential element for the normal work of bearings. Under the condition of the bearing design and manufacture technique, material technique is becoming more and more advanced, and lubricant becomes “the fifth main part”, which has been got a wide-ranged agreement. One of the most critical factors to improve bearing life is lubricant. This paper analyzes lubrication type and mode, and the failure of helicopter transmission system roller bearing caused by improper lubrication. It further explains the importance of lubrication to the bearings. And how to select lubrication mode and lubricant to improve the bearing life is also summed up.

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Sun, Pei Ming, Xie Ben Wei und Shu Qin Chen. „The Research of Lubricating and Colling System of the Low-Speed and Heavy-Load Sliding Bearing“. Advanced Materials Research 744 (August 2013): 95–99. http://dx.doi.org/10.4028/www.scientific.net/amr.744.95.

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This paper analyzes the influence of lubricating oil film of the low-speed and heavy-load sliding bearing on a variety of factors. It introduces the operation of Bearing for lubricating oil film in monitoring method, common fault causes and treatment measures. Finally, the bearing cooling system structure is discussed, providing reference for practical engineering application. There are many reasons to cause the failure of the bearing lubrication such as bearing assembly defects, the error of size and cooling system problems. By detecting and contrast parameters, this study analyze the determine data and correct the fault. Through the use of reasonable structure of the oil tank and cooling water channel, we can improve the lubrication performance, and extend the bearing life. This paper analyzes the factors restricting the low speed and high load sliding bearing lubricant film, and solves the actual bearing lubrication problem.

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Zhang, Feng, Gong Bo Han und Su Xia Duan. „Paper Machine Bearing’s Temperature and Air-Velocity Optimization under Air-Oil Lubrication“. Advanced Materials Research 550-553 (Juli 2012): 3054–58. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.3054.

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The purpose of this resarch was investigated the air-oil temperature field distribution under air-oil lubrication and oil lublubrication, meanwhile also study the air-oil lubrication effect under different air velocity inlet the bearing cavities of the high-speed paper machine dryer section. Base on the CFD theory, the temperature field of CARB bearing outer ring and the velocity field of the bearing cavities were simulated by the FLUENT software.Result show that air-oil lubricatin can reach the same cooling effect is contras with oil lubrication in the same heat production by roller; the best air-velocity value of air-oil lubrication system is obtain for the change of temperature and pressure in bearing cavities. It is confirm that the air-oil lubrication is viable in the high-speed paper machine dryer section.

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Dissertationen zum Thema "Bearing lubrication"

Baart, Pieter. „Grease lubrication mechanisms in bearing seals“. Doctoral thesis, Luleå, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26652.

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Rolling bearings contain seals to keep lubricant inside and contaminants outside the bearing system. These systems are often lubricated with grease; the grease acts as a lubricant for the bearing and seal and improves the sealing efficiency. In this thesis, the influence of lubricating grease on bearing seal performance is studied. Rheological properties of the grease, i.e. shear stress and normal stress difference, are evaluated and related to the lubricating and sealing performance of the sealing system. This includes the seal, grease and counterface. The grease velocity profile in the seal pocket in-between two sealing lips is dependent on the rheological properties of the grease. The velocity profile in a wide pocket is evaluated using a 1-dimensional model based on the Herschel-Bulkley model. The velocity profile in a narrow pocket, where the influence of the side walls on the velocity profile is significant, is measured using micro particle image velocimetry. Subsequently, the radial migration of contaminants into the seal pocket is modelled and related to the sealing function of the grease. Additionally, also migration in the axial direction is found in the vicinity of the sealing contact. Experimental results show that contaminant particles in different greases consistently migrate either away from the sealing contact or towards the sealing contact, also when the pumping rate of the seal can be neglected. Lubrication of the seal lip contact is dependent on several grease properties. A lubricant film in the sealing contact may be built up as in oil lubricated seals but normal stress differences in the grease within the vicinity of the contact may result in an additional lift force. The grease, which is being sheared in the vicinity of the contact, will also contribute to the frictional torque. It is important to maintain a lubricant film in the sealing contact to minimize friction and wear. Here the replenishment of oil separated from the grease, also referred to as oil bleed, is of crucial importance. A model is presented to predict this oil bleed based on oil flow through the porous grease thickener microstructure. The model is applied to an axial sealing contact and a prediction of the film thickness as a function of time is made. The work presented in the thesis gives a significant contribution to a better understanding of the influence of lubricating grease on the sealing system performance and seal lubrication conditions.
Godkänd; 2011; 20110824 (andbra); DISPUTATION Ämnesområde: Maskinelement/Machine Elements Opponent: Georgia Power Distinguished Professor Richard F Salant, Georgia Institute of Technology, Atlanta, USA Ordförande: Professor Braham Prakash, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet, Luleå Tid: Torsdag den 22 september 2011, kl 09.30 Plats: E231, Luleå tekniska universitet

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Simmons, Gregory F. „Journal bearing design, lubrication and operation for enhanced performance“. Doctoral thesis, Luleå tekniska universitet, Maskinelement, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25801.

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The increasing introduction of intermittent power sources combined with the de-regulation of electricity markets has led to increased instability in the electrical grid. This has led to increased start-up and shutdown of regulating power sources such as hydro-electric power plants and operation at non-ideal operating states both of which increase the wear and tear on machines. Likewise, the push for a less environmentally intrusive society has raised the importance of utilizing equipment with reduced impact on the natural surroundings.These challenges lead to a need to improve the robustness of existing and new equipment to guarantee their usefulness in a future with increased instability. While many components in hydropower systems require thorough investigation to improve their robustness, this work is focused on the guide/journal bearings which support the rotating portion of power generating machines.This work addresses the journal bearing problem through a multi scaled approach covering small and large scale laboratory experiments as well as investigations of a full scale machine.A journal bearing test machine was constructed to investigate a number of new synthetic lubricants and polymer bearing materials. These tests found that a significant reduction in power loss could be accomplished without significantly affecting the bearing's minimum film thickness by changing from a traditional mineral oil to a high viscosity index oil of much lower base viscosity grade. The high viscosity index lubricants were then improved to reduce start-up friction as well. Further studies were conducted in small scale to determine the optimum lubricant characteristics for the startup problem. This knowledge was used to develop new lubricants to test in the journal bearing test machine which showed great reductions in power loss in the bearing and pumping system as well as greatly reduced bearing operating temperature.Further experimental work led to the development of practical guidance for power plant operators contemplating a lubricant change. This technique focuses on the importance of maintaining equivalent viscosity in the minimum film thickness region after a lubricant change. Efficiency improvements can then be calculated by comparing the viscosity in the bulk of the bearing to that with the original lubricant.Experimental work with polymer bearing facing materials demonstrated the dramatic reductions in break away friction that these materials can provide. A number of polymer composite materials were investigated for their friction characteristics at the moment of the start of sliding, finding that PTFE based materials were far superior to traditional Babbitt metal. This work with polymer faced bearings was extended to testing in a tilting pad journal bearing test rig which allowed for identification of the dynamic characteristics resulting from changes in bearing pad material.Investigations in the full scale with the Porjus U9 unit provided valuable insight into the dynamics of a full scale machine as well as needed data for the improvement of multi-physics models of bearings. Insights from the Porjus U9 experiments clarify many of the design challenges for large journal bearings.The results from this work demonstrate that significant performance improvement of journal bearings is possible through the use of new lubricants, materials, and adjustments in operational methods.
Godkänd; 2013; 20130531 (gresim); Tillkännagivande disputation 2013-09-06 Nedanstående person kommer att disputera för avläggande av teknologie doktorsexamen. Namn: Gregory F Simmons Ämne: Maskinelement/Machine Elements Avhandling: Journal Bearing Design, Lubrication and Operation for Enhanced Performance Opponent: Professor Rob Dwyer-Joyce, Dept of Mechanical Engineering, University of Sheffield, UK Ordförande: Professor Braham Prakash, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet Tid: Fredag den 27 september 2013, kl 13.00 Plats: D770, Luleå tekniska universitet

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Paydas, Atil. „An investigation into fluid film lubrication in dynamically loaded bearings“. Thesis, University of Central Lancashire, 1998. http://clok.uclan.ac.uk/19223/.

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This thesis is concerned with the development of a nunerical technique for the computational analysis of ruptured liquid films in both steadily and dynamically loaded bearings. The approach is based on the principle of oil flow continuity. A cavitation algorithm, proposed by H. G. Elrod, was implemented for studies of hydrodynamic lubrication in infinitely long cylinder/plane bearings (i.e. non-conformal contacts) under combined sliding, rolling and normal motion. Difficulties involved in the implementation of this algorithm were investigated in great depth. A new 'improved' method of solution, which is well-suited to the computational analyses of steadily and dynamically loaded bearings, was developed. The improved technique involves the solution of the hydrodynamic lubrication problem for oil film pressures or degrees of lubricant filling in the full film and cavitated regions of a bearing. Detailed studies of cylinder/plane under conditions of both instantaneous and sinusoidal normal motion were performed. The improved solution was shown to facilitate the implicit implementation of the Jakobsson-Floberg-011son boundary conditions (i.e. the inclusion of 'oil film history' phencinena) in dynamically loaded bearing analyses. Detailed comparisons between the oil film history and classical solutions, and published experimental studies were made. Computer programs based on the classical Reynolds equation and the improved method of solution were developed for the analysis of circuTiferentially grooved, finite journal bearings operating under steady-state and dynamic loading conditions. The improved method of solution produced more realistic predictions of performance characteristics, particularly oil film extent, oil flow and bearing power loss. Comprehensive comparisons with published theoretical and experimental studies were made. Encouraging agrenent was obtained between the oil flow continuity analyses and experiments. Journal centre orbit analyses of dynamically loaded bearings, typically found in reciprocating engines, indicated that the oil film history solution may reveal a nunber of new features of time-varying performance characteristics not previously predicted by the classical Reynolds solution.

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Jamaludin, Nordin. „Monitoring low speed rolling element bearing using stress waves techniques“. Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341044.

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Campbell, Craig Maurice. „Signature analysis techniques for needle bearing defect detection“. Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/19539.

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Westsson, David. „Simulation of torque caused by the lubrication fluid in a ball bearing“. Thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-126563.

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De, La Presilla Román. „Fretting in Wind Power Pitch Bearings: Micro-Slip Experiments and Bearing Test Rig Design“. Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279489.

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Wind power is the fastest-growing form of green energy production in Europe, today accounting for 15% of the total power demand with 100.000 turbines installed. This tremendous development relied on a massive technological undertaking that must be continued, and even accelerated in order to meet the European Commission’s environmental goals for 2050. Currently, more active individual control of the rotor blades, turning the blade into and out of the wind, has proven its ability to reduce structural loads on the blades and other components significantly, therefore paving the road towards strong cost reductions. To allow for such adjustment, the rotor blades are connected to the rotor hub via pitch bearings. However, these new structural load reduction control strategies force the pitch bearings into a much more demanding operation condition. More frequent positioning activity and often in the form of smaller oscillating motions, when compared to traditional pitch control. This leading to an increased risk of wear damage of the pitch bearing that could fully incapacitate the blade control. At which point the safe regulation of the turbine can no longer be guaranteed and catastrophic failure, such as the loss of a rotor blade, is possible. This project pertains to the design a bearing test rig that can be used to test rolling element bearings with contact conditions that emulate those found in pitch bearings. A novel frameless motor-driven concept is proposed. The concept is aimed towards preventing unnecessary damage of non-test bearings and improving the dynamic performance of the test rig for a given motor capacity. One further objective of the project involved using an existing KTH single contact test rig to study the friction behavior of different lubricants when minute reciprocal tangential displacements are imposed.
Vindkraft är idag det snabbast växande området för grön elproduktion i Europa och står med 100 000 installerade turbiner för 15% av den totala elförsörjningen. Denna otroliga utvecklingen har berott på en massiv teknologisk insats som måste fortsätta. För att nå Europakommissionens miljömål för 2050 måste expansionen av grön elproduktion och vindkraft till och med trappas upp. Nyligen har en mer aktiv individuell reglering av rotorbladen, vilket möjliggör att bladen kan styras in- och ut ur vinden, visat sig kunna reducera lasterna på blad och andra komponenter avsevärt, vilket därmed möjliggör stora kostnadsreduceringar. Dessa justeringar möjliggörs genom att rotorbladen ansluter hubben via ett rotorbladslager. Dessa nya lastreducerande reglerstrategier tvingar dock lagren att arbeta under högre belastning jämfört med traditionell reglering av rotorbladens lutningsvinkel. Det här sker genom mer frekvent positionering och ofta som små oscillerande rörelser, vilket leder till en högre risk för slitage på rotorbladslagren, som i sin tur kan leda till förlust av rotorbladsregleringen. När så sker kan inte längre en säker reglering av turbinen garanteras och katastrofala fel är möjliga, så som förlust av rotorblad. Det här projektet avser att utarbeta en design för en lagerprovningsrigg som kan användas för att testa rullager med kontaktvillkor som efterliknar de som återfinns i rotorbladslagren. Ett nytt koncept,m som är baserat på en ramlös motor, presenteras. Konceptet avser att förhindra onödigt slitage hos testriggens motorlager och förbättra de dynamiska egenskaperna för en given motorkapacitet. Projektet innefattar även en studie av friktionsbeteendet hos olika smörjmedel under små upprepande tangentiella rörelser, som utförts med en befintlig testrigg på KTH.

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Scholes, Susan Claire. „The tribology of hard bearing surfaces for use in hip prostheses“. Thesis, Durham University, 1999. http://etheses.dur.ac.uk/1475/.

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Elliott, Tony William. „Highly loaded hybrid journal bearings“. Thesis, Liverpool John Moores University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238639.

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Leung, P. S. „An investigation of the dynamic behaviour of floating ring bearing systems and their application to turbogenerators“. Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384577.

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Bücher zum Thema "Bearing lubrication"

Richard, Booser E., Hrsg. Applied tribology: Bearing design and lubrication. 2. Aufl. Chichester, West Sussex, England: Wiley, 2008.

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Khonsari, Michael M. Applied tribology: Bearing design and lubrication. 2. Aufl. Chichester, West Sussex, England: Wiley, 2008.

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Khonsari, Michael M., und E. Richard Booser. Applied Tribology: Bearing Design and Lubrication. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118700280.

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Richard, Booser E., Hrsg. Applied tribology: Bearing design and lubrication. New York: John Wiley, 2001.

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Zaretsky, Erwin V. Bearing elastohydrodynamic lubrication: A complex calculation made simple. [Washington, D.C: National Aeronautics and Space Administration, 1990.

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Bearing design in machinery: Engineering tribology and lubrication. New York: Marcel Dekker, 2003.

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Campbell, T. I. Furthur laboratory studies of friction in TFE slide surface of a bridge bearing. [Toronto]: Published by the Research and Development Branch, Ontario Ministry of Transportation, 1989.

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Blanchet, Thierry Alain. Demonstration of the feasibility of high temperature bearing lubrication from carbonaceous gases. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1996.

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Morales, Wilfredo. Analysis of a spacecraft instrument ball bearing assembly lubricated by a perfluoroalkylether. [Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1986.

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Bruno, Piccigallo, Hrsg. Hydrostatic lubrication. New York: Elsevier, 1992.

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Buchteile zum Thema "Bearing lubrication"

Qiu, Ming, Long Chen, Yingchun Li und Jiafei Yan. „Bearing Lubrication Application“. In Bearing Tribology, 187–212. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-53097-9_7.

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Qiu, Ming, Long Chen, Yingchun Li und Jiafei Yan. „Sliding Bearing Lubrication Theory“. In Bearing Tribology, 101–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-53097-9_5.

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Qiu, Ming, Long Chen, Yingchun Li und Jiafei Yan. „Rolling Bearing Lubrication Theory“. In Bearing Tribology, 145–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-53097-9_6.

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Ai, Xiaolan, William M. Hannon und M. N. Kotzalas. „Rolling Bearing Lubrication“. In Encyclopedia of Tribology, 2856–63. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_345.

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Qiu, Ming, Long Chen, Yingchun Li und Jiafei Yan. „Friction, Wear, and Lubrication in the Bearing Application“. In Bearing Tribology, 1–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-53097-9_1.

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Jacobs, Georg, und Michael Plogmann. „Rolling Bearing Damages“. In Encyclopedia of Lubricants and Lubrication, 1600–1618. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_296.

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Lugt, P. M., und A. Gabelli. „Grease Lubrication and Bearing Life“. In Grease Lubrication in Rolling Bearings, 283–308. Oxford, UK: John Wiley & Sons Ltd, 2012. http://dx.doi.org/10.1002/9781118483961.ch13.

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Jacobs, Georg, und Michael Plogmann. „Rolling Bearing Lubrication and Materials“. In Encyclopedia of Lubricants and Lubrication, 1618–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_297.

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Burton, Ralph A. „Different Materials in the Journal and Bearing“. In Heat, Bearings, and Lubrication, 54–59. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1248-5_7.

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Jacobs, Georg, und Michael Plogmann. „Rolling Bearing: Types and Features“. In Encyclopedia of Lubricants and Lubrication, 1633–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_295.

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Konferenzberichte zum Thema "Bearing lubrication"

Cann, P. M., und A. A. Lubrecht. „Bearing Performance Limits With Grease Lubrication“. In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63205.

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This paper has examined the influence of bearing design and operation in controlling lubricant supply to the contact zone. Grease lubricated contacts are liable to starvation and as a result the film thickness is reduced, this can result in surface damage or premature bearing failure. It is of obvious importance to know when starvation occurs and the effect of grease type, bearing design and operation on lubrication replenishment. The aim therefore is to develop a starvation parameter capable of predicting the operating limits for a particular bearing/grease system. A number of bearing design parameters are examined in the paper, these include cage design, ball spin and bearing size. Ball spin and cage effects can be efficient mechanisms for maintaining the lubricant supply to the track. Increased bearing size, line contact geometries and high load result in reduced lubricant replenishment of the contact. Using this analysis it will be possible to establish operating limits for families of bearings.

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Allega, M. „Improving Roll Neck Bearing Lubrication“. In AISTech 2021. AIST, 2021. http://dx.doi.org/10.33313/382/229-42612-218.

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Allega, M. „Improving Roll Neck Bearing Lubrication“. In AISTech 2021. AIST, 2021. http://dx.doi.org/10.33313/382/129.

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Xie, Zhongliang, Chunmin Cheng, Jian Jiao, Yun Zhang und Liang Hao. „Analysis of the Interface Lubrication Performances of Water Lubrication Bearing“. In 2020 Global Reliability and Prognostics and Health Management (PHM-Shanghai). IEEE, 2020. http://dx.doi.org/10.1109/phm-shanghai49105.2020.9280970.

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Allega, M. „Improving Roll Neck Bearing Grease Lubrication“. In AISTech 2020. AIST, 2020. http://dx.doi.org/10.33313/380/238.

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Grzegorz, Rotta, und Wasilczuk Michal. „CFD Analysis of the Lubricant Flow in the Supply Groove of a Hydrodynamic Thrust Bearing Pad“. In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44304.

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Inlet temperature is one of the main inputs in all models for analysis of fluid film bearings performance. On the other hand inlet temperature distribution and also oil speed distribution at the inlet is the result of flow phenomena in the gap between bearing pads. These phenomena are complex and in many cases additionally affected by a special bearing design incorporating various arrangements of forced oil supply to the gap between pads. The reason for such arrangements is more efficient introducing of the lubricant cooled in an external cooling system to the oil film. Not much is known about flow phenomena in the gap between the pads and even less if the bearing is fitted with any kind of directed lubrication system. One of those special bearing arrangement is a leading edge groove (LEG) design described by Mikula [1] Experimental results showed that LEG lubricating system in comparison to flooded lubrication caused about 10–20°C drop in maximum temperature in high-speed bearings. But not much is known of potential benefits of using this lubrication method in large low-speed bearings applied in water turbines. There were no attempts of adaptation of this lubrication system to large size bearings. In this case modeling is necessary because of large cost of experiments. Contemporary computer codes of Computational Fluid Dynamics (CFD) enable one to study flow between bearing pads or in lubricating groove and even to build models of a whole hydrodynamic bearing within CFD systems. Some results of modeling lubricant flow in the gap in a bearing with a directed lubrication system are presented in the paper.

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Ogata, Hideki. „Thermohydrodynamic Lubrication Analysis of Slider Bearings With Steps on Bearing Surface“. In ASME/STLE 2009 International Joint Tribology Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/ijtc2009-15144.

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This study focuses on the thermohydrodynamic lubrication analysis of fluid film bearings with step on the surface such as a Rayleigh step bearing. In general, the Reynolds equation does not satisfy the continuity of the fluid velocity components at steps. This discontinuity results in the difficulty to solve the energy equation for the lubricants, because the energy equation needs the velocity components explicitly. The author has solved this problem by introducing the equivalent clearance height and the equivalent gradient of clearance height at steps. These parameters remove the discontinuity of velocity components and the energy equation as well, so that one can solve these equations on all of the bearing surfaces including the step region by finite differential method (FDM). The numerical results of pressure and temperature distributions by the proposed method for a Rayleigh step bearing were compared with the results obtained by a commercial CFD package. These results showed good agreement with each other. This method is extended to 2D unequal grid problems.

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Tao, Wei, Yiqing Yuan, William F. Resh und James F. Szewczyk. „CFD Simulation of Connecting Rod Bearing Lubrication“. In SAE 2003 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2003. http://dx.doi.org/10.4271/2003-01-0924.

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Iwasaki, Hideyuki, Yuuto Higasa, Masaaki Takiguchi, Seiichi Sue und Keitaro Shishido. „Effects of Design for Piston Pin and Bearing on State of Bearing Lubrication“. In ASME 2007 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/icef2007-1723.

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We measured the friction of piston pin boss bearings for a gasoline engine to make sure of the state of lubrication. In addition, we checked how the shape of the piston pin as well as that of the pin boss influenced the state of bearing lubrication, which was analyzed according to the FEM calculations of pin and bearing contact pressure. As a result, it was made clear that the state of bearing lubrication sharply deteriorated at an engine speed of 3500 rpm or higher because the deformed pin caused the pin edge to heavily come into contact with the bearing, and a side relief was able to improve the state of lubrication at a high engine speed. We also gave a check to the piston pin for thickness to see how it influenced the state of lubrication, finding that a lighter-weight pin led to the deterioration of lubrication.

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Iyer, Naresh S., Hai Qiu, Weizhong Yan und Kenneth A. Loparo. „Early Detection of Lubrication Anomalies in Oil-Lubricated Bearings“. In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27950.

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Condition monitoring of roller element bearings is of considerable interest to many industries since faulty roller element bearings are known to cause the majority of problems in rotating machinery. The class of failure modes in roller bearings that has received the most attention include spalling or localized defect in one or more of the bearing components. This refers to dislodgement of a portion of the contact surface in one or more of the bearing components in the presence of various kinds of stresses like rotor imbalance, speed, bad lubrication, heavy radial and axial loads. Whereas substantial work has been done in the detection of spalls in bearing components, studies show that one of the primary root causes of spalls in a bearing tends to be ineffective lubrication resulting either from lack of lubrication conditions or the presence of contaminants in the lubricant. Leading bearing companies have indicated that incorrect lubrication can account for more than 90% of bearing failures because of which lubrication can be a key influence that can make or break bearing service and life. This emphasizes the need to develop techniques to sense lubrication anomalies as well as provide information needed to act upon them. In other words, monitoring the health and effectiveness of the bearing lubricant should be at the forefront of a condition-monitoring program for bearings. In this paper, we describe experiments, analyses and results obtained for monitoring and detecting anomalies in bearing lubrication for oil-lubricated bearings. More specifically, we consider two kinds of lubrication anomalies: lack of lubrication and contamination of lubrication. Our work involves the use of techniques in sensing and analyses of acoustic emissions from the bearing housing for detection of anomalous lubrication conditions of the above classes. We explore these techniques by conducting controlled experiments where, conditions equivalent to the appropriate fault condition are simulated in a test rig and AE readings are recorded; as a baseline, we also record vibration readings using traditional accelerometers. Our analyses will consist of extracting features from the AE signal that can suitably distinguish between normal and abnormal lubrication conditions. Additional analyses that can potentially be used to understand the degree of severity of the abnormality will also be presented.

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Berichte der Organisationen zum Thema "Bearing lubrication"

Ozeki, Hiroshi. The Technology About Lubrication and Cooling of a Bearing for Machine Tool Spindle. Warrendale, PA: SAE International, Mai 2005. http://dx.doi.org/10.4271/2005-08-0135.

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Steinhoff, R. G. Lubrication for high load duplex bearings. Office of Scientific and Technical Information (OSTI), August 1997. http://dx.doi.org/10.2172/650157.

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Steinhoff, R. G. Testing and Lubrication for Single Race Bearings. Office of Scientific and Technical Information (OSTI), März 1998. http://dx.doi.org/10.2172/16546.

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Steinhoff, R. G. ES and H-compatible lubrication for duplex bearings. Office of Scientific and Technical Information (OSTI), Oktober 1997. http://dx.doi.org/10.2172/650310.

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