Thematische Bibliographien / Oil-air lubrication

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Auswahl der wissenschaftlichen Literatur zum Thema „Oil-air lubrication“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 11. Februar 2022

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Zeitschriftenartikel zum Thema "Oil-air lubrication"

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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Zeng, Qunfeng, Jinhua Zhang, Jun Hong und Cheng Liu. „A comparative study on simulation and experiment of oil-air lubrication unit for high speed bearing“. Industrial Lubrication and Tribology 68, Nr. 3 (11.04.2016): 325–35. http://dx.doi.org/10.1108/ilt-05-2015-0066.

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Purpose The purpose of this paper is to design an oil-air lubrication system with low temperature rise, vibration and noise simplifies the spindle configuration. The oil-air lubrication unit is a key component for high-speed grinding machine tools. The development of oil-air lubrication unit suitable for high/ultrahigh rotational speed is a daunting task owing to the lubrication challenges. Design/methodology/approach This paper emphasizes three main issues: the analysis of oil-air two-phase flow for tradition oil-air lubrication unit with the simulation method; the design of new oil-air lubrication unit for the high/ultrahigh-speed grinding machine tools and the comparative experiment research of tradition and new oil-air lubrication unit. The optimum structure parameters that create the optimum flow pattern and operating conditions resulting in low temperature increase, vibration and noise of oil-air lubricated spindle can be achieved by the simulation method and experiments. Findings The simulation and experimental results show that new oil-air lubrication unit lubricating a high speed electric spindle has a better performance with a small temperature increase and vibration, which means that our proposed method is an effective design method for oil-air lubrication system. Originality/value A design method suitable for high-speed oil-air lubrication unit is proposed. New oil-air lubrication unit is expected to apply for high/ultrahigh rotational speed grinding machine tools.

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Cai, Lin, Jin Li Wang und Hong Tao Zheng. „An Experimental Study on Oil-Air Lubrication of Sliding Friction Element“. Applied Mechanics and Materials 34-35 (Oktober 2010): 181–85. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.181.

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The objective of this research is to study the lubricating property of oil-air lubrication on sliding friction element. The performance of sliding friction element under different lubrication parameters and preloads were investigated by measuring the element’s temperature and friction coefficient. The results show that oil air lubrication could complete the lubrication and cooling of sliding friction element. As the oil supply is increased at the same load, speed and air supply level, the temperature rise and friction coefficient decrease, but when the oil supply is increased to 15ml/h, they remain unchanged. As the air supply is increased at the same load, speed and oil supply level, the temperature rise decreases monotonically and the friction coefficient remains steady.

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Li, Li Quan, Shao Gang Liu und Jin Li Wang. „The Research on Oil-Air Lubrication and Oil Lubrication in the Sliding Bearing“. Key Engineering Materials 572 (September 2013): 393–96. http://dx.doi.org/10.4028/www.scientific.net/kem.572.393.

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In order to study the effect of oil-air lubrication on traditional sliding bearing, the experiments oil-air lubrication and oil lubrication have been done by using friction-abrasion testing machine. By means of measuring friction moment, the temperature rise of two different lubrication systems in the same conditions and studying the friction moment and the temperature rise of oil-air lubrication and oil lubrication with different load at the same rotating speed level, the results obtained show that when rotating speed and oil supply is at 210rpm and 1.4L/h level, the friction moment of traditional sliding bearing with oil lubrication increases significantly after the load 900N, and when rotating speed, oil supply and air pressure is at 210rpm , 30ml/h and 0.25MPa level, the friction moment of traditional sliding bearing with oil-air lubrication increases significantly after the load 1500N. The friction moment of oil-air lubrication and oil lubrication is almost the same before the load 900N, and after the load 900N, the friction moment of oil-air lubrication is much lower than the oil lubrication. The oil-air lubrication temperature rise is much lower than the oil lubrication in traditional sliding bearing with the same experimental conditions.

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Wen, Guan, Youhua Ge, Dai Zhendong und Zheng Gao. „Study on aeronautical steel under minimal quantity lubrication“. Industrial Lubrication and Tribology 67, Nr. 5 (10.08.2015): 402–6. http://dx.doi.org/10.1108/ilt-04-2013-0044.

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Purpose – The purpose of this paper is to investigate that if the lubrication system of a helicopter reducer is compromised, its gears and bearings will be at non-lubricating oil work state, which causes the reducer to be damaged in a very short time. Design/methodology/approach – Various 2 per cent additives were injected and mixed with aeronautical oil to produce 45-min oil/mist lubrication and oil/air lubrication experiments performed upon aeronautical steel tribo-pairs. Findings – The results show that the best anti-wear effect is produced by oil/air lubrication that contains 2 per cent T391. It consumes the least quantity of oil and produces the least wear width, the least rise in temperature and the best surface wear quality. Originality/value – The technology of oil/air lubrication that contains an extreme-pressure and anti-wear additive is a feasible way to improve the operational ability of a helicopter transmission system that is out of oil.

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Wang, Jin Li, Li Quan Li und Shao Gang Liu. „The Research on Oil-Air Lubrication in Grooved Sliding Bearing“. Key Engineering Materials 572 (September 2013): 384–87. http://dx.doi.org/10.4028/www.scientific.net/kem.572.384.

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Many Factors affect the oil-air lubrication of sliding bearing such as oil supply, air pressure, load, bearing structure and so on. In order to study the effects of bearing structure on oil-air lubrication in sliding bearing, the oil-air lubrication and oil lubrication experiments of grooved sliding bearing have been done by using friction-abrasion testing machine. By means of measuring the temperature rise and the friction coefficient of grooved sliding bearing on oil-air lubrication and oil lubrication with different level of load at the same rotating speed, the results obtained show that the friction coefficient of oil-air lubrication with oil supply 30ml/h, air pressure 0.25MPa is almost the same as oil lubrication with oil supply 1.4L/h. The oil-air lubrication temperature rise is much lower than the oil lubrication in grooved sliding bearing with the same experimental conditions.

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Tret'yakov, E. I., N. A. Yurchenko und A. A. Lysyak. „Improving Oil–Air Lubrication Systems“. Metallurgist 48, Nr. 7/8 (Juli 2004): 414–16. http://dx.doi.org/10.1023/b:mell.0000048427.14344.72.

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Bao, Heyun, Xiaonan Hou und Fengxia Lu. „Analysis of Oil-Air Two-Phase Flow Characteristics inside a Ball Bearing with Under-Race Lubrication“. Processes 8, Nr. 10 (01.10.2020): 1223. http://dx.doi.org/10.3390/pr8101223.

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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 characteristics inside a ball bearing with under-race lubrication play a key role in lubrication and cooling performance. The motions of ball bearing subassemblies are complicated. Ball spin affects the oil volume fraction. In this paper, the coupled level set volume of fluid (CLSVOF) method is used to track the oil-air two-phase flow inside the ball bearing with under-race lubrication. The influence of various factors on the oil volume fraction inside the ball bearing with under-race lubrication is investigated, particularly rotating speeds, inlet velocity and the size of oil supply apertures under the inner ring. The influence of the ball spinning is analyzed separately. The result demonstrates that, on account of the centrifugal force, lubricating oil is located more on the outer ring raceway at rotational speeds of 5000 r/min, 10,000 r/min, 15,000 r/min and 20,000 r/min. The oil volume fraction inside the bearing gradually increases at an oil inlet velocity of 5 m/s, 10 m/s and 15 m/s. The circumferential distribution of oil is also similar. As the diameter of the oil supply aperture increases from 1.5 mm to 2 mm, the oil volume fraction increases inside the ball bearing. However, the oil volume fraction slightly decreases from 2 mm to 2.5 mm of oil supply aperture diameter. Ball spin does not affect the circumferential distribution trend of the lubricating oil, but slightly reduces the oil volume fraction. Furthermore, ball spin causes the surface fluid to rotate around its rotation axis and increases the speed.

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Li, Li Quan, Shao Gang Liu, Jin Li Wang und Lin Cai. „The Research on Oil-Air Lubrication and Oil Lubrication Used in the Sliding Friction Element“. Key Engineering Materials 486 (Juli 2011): 283–86. http://dx.doi.org/10.4028/www.scientific.net/kem.486.283.

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In order to study the effect of oil-air lubrication on sliding friction element, the experiments between oil-air lubrication and oil lubrication have been done by using friction-abrasion testing machine. By means of measuring the temperature rise, the friction coefficient of two different lubrication systems in the same conditions and studying the temperature rise and the friction coefficient of oil-air lubrication with different oil flow rate at the same load and rotating speed level, the results obtained show that when the oil flow rate of oil- air lubrication is equal to 10ml/h, the temperature rise of the element is the same as submerged lubrication caused. As the effect of oil aeration, the friction coefficient of oil-air lubrication is higher. When the load and rotating speed is at 1500N, 210rpm level, as the oil flow rate increases, the temperature rise and friction coefficient of oil-air lubrication element decreases significantly, however, they remain almost unchanged with the increasing of oil supply while the oil flow rate is increased to 15ml/h.

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Syedhidayat, Shan, Quan Wang, Al-Hadad M. A. A. Mohsen und Jinrong Wang. „Choice and Exchange of Lubricating Oil for Injection Molding Machine“. Recent Patents on Mechanical Engineering 12, Nr. 4 (26.12.2019): 378–82. http://dx.doi.org/10.2174/2212797612666190730145515.

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Background: One of the most common manufacturing equipment for polymer product is injection molding machine. In order to ensure the precise, stable and continuous operation of the injection molding machine, the maintenance of the lubrication system must be done well. The stability, reliability, rationality and low noise performance of the lubrication system of injection molding machine directly affect the quality of injection products, dimensional accuracy, molding cycle, working environment and maintenance. Objective: The purpose of this study is to introduce the methods of choice, maintenance of lubricating oil for injection molding machine from many literatures and patents in the recent years, such as lubricating oil device, lubricating composite and structure. Methods: An example of the 260M5 automatic injection molding machine is introduced for the inspection and maintenance of the lubrication system including lubricating oil and lubricating grease. Results: To ensure the lubrication of the injection molding machine, it needs to strictly observe the lubrication time and modulus of the injection molding machine. It needs to strictly control the temperature rise of the lubricating oil and select the correct lubricating oil and grease to ensure the lubrication quality. Conclusion: In the operation of the injection molding machine, it is necessary to check that the lubricating oil is sufficient and the lubricating points are working properly. It ensures sufficient lubrication of the injection molding machine and strictly observes the lubrication time and modulus of the injection molding machine. The stored lubricating oil should be sealed well to prevent air pollution.

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Mehr Quellen

Dissertationen zum Thema "Oil-air lubrication"

Pinckney, Francis Douglas. „Air-oil mist lubrication of small bore ball bearings at high speeds“. Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/104537.

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Hehir, Ryan Thomas. „A CFD Investigation of the Two Phase Flow Regimes Inside the Bearing Chamber and De-aerator of a Jet Engine“. Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73386.

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In a jet engine air and oil are mixed during removal from the bearing chamber. Before the oil can be recycled back into the system it must be separated from the air. This is accomplished through use of a de-aerator and breather. The oil air mixture enters the de-aerator first. The de-aerator is a vertical cylinder in which the air and oil enter from the top of the system. Gravity then pulls the oil down as it circulates along the outer wall of the de-aerator. The air is forced out through a top hole and sent to the breather where any oil droplets which remain are furthered separated. A pedestal is located near the bottom of the de-aerator. The pedestal creates a gap between itself and the de-aerator wall. Ideally this gap should be large enough to allow oil to flow through the gap without pooling on the pedestal, but small enough so that air does not flow through the gap. The oil will pool up on the pedestal and reduce the efficiency of the system. In this research, a 30° conical pedestal with a gap of 10.7% was tested. The results showed that the pedestal gap of 10.7% is too large and allows air to flow through the gap. The maximum water was 8.5% and the average water thickness was 5.11%. After studying both the previous experimental data and current CFD data, it is recommended further testing be conducted on pedestal gaps between 8.5% and 9.5%.
Master of Science

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Sikora, Vojtěch. „Optimalizace mazacího systému pro mazání ložisek válcovacích stolic“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443758.

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The thesis focuses on the optimization of the central lubrication system for the lubrication of rolling bearings of rolling mills in the operation continuous wire rod mill. The work is divided into theoretical and practical part. The first part of the theoretical work is focuses on the search of rolling and tribodiagnostics. The next part focuses on the description of modern central lubrication systems, explanation of their principle and practical use. The practical part explains the function of the old lubrication system for rolling mill bearings with an analysis of its problems. Next is described the technical design of a new central lubrication system, its application into operation and its actual commissioning are described. The last part of the thesis is the conclusion and evaluation of the benefits of the new central lubrication system compared to the old one.

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Kučera, Ondřej. „Realizace edukačních úloh na experimentálních stanicích pro kluzná ložiska mazaná olejem a vzduchem“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229016.

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This master thesis is focused to make education exercise on simulation equipment, tilting pad apparatus and air bearing apparatus. Exercise are, for better understanding problems, completed about exercise measurement viscosity. Were to be proposed three separate exercise for exercising, which were to be well – tried. Measured data from stations for sliding bearing will students confront with computed data. To every exercise are created instructions for exercising, educational presentation and poster to arrangement.

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Gilbert, Kenneth T. „Design and development of a lubrication pump for a horizontally mounted air-conditioning compressor“. [Johnson City, Tenn. : East Tennessee State University], 2003. http://etd-submit.etsu.edu/etd/theses/available/etd-1111103-155816/unrestricted/gilbertk.pdf.

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Gao, Chih-Chung, und 高志忠. „The Performance of High-Speed Ball Bearings with Oil-Air Lubrication System“. Thesis, 1997. http://ndltd.ncl.edu.tw/handle/86494706958269375700.

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碩士
國立中正大學
機械工程學系
85
The ball bearing is widely used on many high speed rotating systems due to its low starting friction and high load capacity. However, heat generating and dynamic loading caused by high speed operation have been the limiting factors for increasing the speed limit of many high speed ball bearing applications. Therefore, how to provide proper lubrication and preload to reduce heat generation effectively are major task for high-speed ball bearing operation.Recently, oil-air lubrication has been used on high-speed ball bearing because of precise oil quantity control and high cooling efficiency. However, the fluctuation of oil supply resulted from the periodic oil feeding is unfavorable. In this study, the measuring equipment of fluctuation of oil supply was established. The operation parameters affecting stability of oil supply of oil-air lubrication system are experimentally studied. A test rig for high-speed ball bearings was also developed. The stable oil supply conditions obtained from preceding experiments is applied to bearing tests. The performance of high-speed ball bearing under different preload, running speed and oil flow rate has been investigated by measuring temperature rise and friction torque of test bearing.From this study, operating conditions that provide stable oil supply and good bearing performance were established. The effects of bearing preload on bearing temperature rise was also presented. It is also demonstrated that the high-speed ball bearing test rig built in this study provides a useful tool to develop lubrication technology for high-speed rotating system.

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Chang, Hann-Yow, und 張漢佑. „The Design, Manufacture, and Analysis of the Continuous Oil-Air Lubrication System of Plunger Type for High Speed Spindle“. Thesis, 2004. http://ndltd.ncl.edu.tw/handle/64355812203995565717.

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碩士
國立彰化師範大學
機電工程學系
92
Abstract The study is to devise an oil-air lubrication system, which can be employed to bearing lubrication, especially high-speed bearing. The consumption of the lubrication oil in the oil-air lubrication system is little. The stability of the lubrication oil will influence the temperature rise and the friction torque of the high-speed spindle. Therefore, the study is to design an oil-air lubrication system to provide a stable output control of lubrication oil. The system can offer minimum amount of lubrication oil to the spindle continuously. The system is divided into two parts: the drive mechanism and the oil circuit system. The first part is framed by a mechanic cam and then performed the constant stable output by dual columns. In order to make the output as stable as it can be, the movement of the dual column should work in uniform motion. Therefore, the flat cam is obtained with the help of the mechanical dynamics software ADAMS. After be constructed and tested, it can serve as devised. In the design of oil circuit system, the main structure is equipped with different check valves, which are made of Acrylic. The system has been tested to see its volume effect in different structures. The result shows that the check valve of double layers rubber pipe has better volume effect. Thus, based on the design, tested with regular oil output, minimum oil output, the particle size of the oil-air output and the variety of density. It is obviously that the system can reach the expected goal after the tests. Then, the lubrication system is constructed with 8 outlets.

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Bücher zum Thema "Oil-air lubrication"

DellaCorte, Christopher. A systems approach to the solid lubrication of foil air bearings for oil-free turbomachinery. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Buchteile zum Thema "Oil-air lubrication"

Gaca, Hans, Jan Ruiter, Götz Mehr und Theo Mang. „Oil-Air Systems“. In Encyclopedia of Lubricants and Lubrication, 1258–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_116.

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Bui, Tuan-Anh, und Quang-Tu Vu. „A Study on an Oil-Air Mixed Lubrication Monitoring System for Spindle Unit of CNC Milling Machine“. In Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020), 920–28. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69610-8_122.

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„Air-Oil-Lubrication“. In Encyclopedia of Lubricants and Lubrication, 21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_100020.

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„Oil/Air Lubrication“. In Encyclopedia of Lubricants and Lubrication, 1258. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_100494.

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„Compressed Air-Oil Systems“. In Encyclopedia of Lubricants and Lubrication, 279. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_100130.

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„Lubrication with Mixtures of Air and Oil Drops“. In Encyclopedia of Lubricants and Lubrication, 1097. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_100419.

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Kumar, Ashwani, Yatika Gori und Pravin P. Patil. „Finite Element Analysis-Based Thermo-Mechanical Performance Study of Heavy Vehicle Medium Duty Transmission Gearbox“. In Handbook of Research on Advancements in Manufacturing, Materials, and Mechanical Engineering, 322–36. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4939-1.ch015.

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The main objective of this chapter is to investigate the performance of automobile transmission gearbox under the influence of load, rotational speed, and lubrication on multi speed gearbox gear surface. Gear oil SAE 80W-90 was used as gearbox lubricant, for cooling of transmission gearbox for high performance. An assumption has been made at the air-gear oil mist within transmission is under steady state condition, in isothermal equilibrium with the transmission gear oil bath of lubricant. The lubrication in multi speed transmission is subjected to thermo-elastohydrodynamic lubrication. The present chapter deals with the thermo-mechanical performance study of multi speed transmission (4 speed, excluding reverse gear) system, which combines transient structure analysis of the gear train assembly. The engaged gear teeth pairs transmit torque subjected to thermo-elastohydrodynamic arrangements of lubrication. The study here analyzed transmission in second gear pair.

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Itoigawa, F., T. Nakamura und T. Matsubara. „Starvation in Ball Bearing Lubricated by Oil and Air Lubrication System“. In Tribology Series, 243–52. Elsevier, 1998. http://dx.doi.org/10.1016/s0167-8922(98)80079-5.

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Konferenzberichte zum Thema "Oil-air lubrication"

Li, Liquan, Shaogang Liu, Jinli Wang und Jipeng Liu. „The Research on Oil-air Lubrication and Oil Lubrication in the Rolling-sliding Friction Element“. In information Services (ICICIS). IEEE, 2011. http://dx.doi.org/10.1109/icicis.2011.84.

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Ho¨hn, Bernd-Robert, Klaus Michaelis und Hans-Philipp Otto. „Minimised Gear Lubrication by a Minimum Oil/Air Flow Rate“. In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34119.

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The objectives of the research project were to investigate the limits concerning possible reduction of lubricant quantity in gears without detrimental influence on the load carrying capacity. The investigations covered the influence of the oil level in dip lubricated systems as well as the oil flow rate in spray lubricated systems namely oil-air supply systems on power loss, heat generation and load carrying capacity. The load carrying capacity in terms of characteristic gear failure modes was determined and was compared to the results using conventional lubricant volumes with dip lubrication. Therefore in back-to-back gear tests the parameters speed, load and oil quantity were varied for examination of the four main gear flank damages: scuffing, wear, pitting and micropitting. The investigations showed the application potential of oil/air lubrication also for heavy duty transmissions nevertheless there exists a natural limitation for lowering the oil quantity in transmissions without detrimental influence on the load carrying capacity.

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Nakayama, Keiji. „Triboplasma Generated Under Perfluoropolyether Oil Lubrication“. In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44467.

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In order to prove the triboplasma generation in the vicinity of the sliding contact under oil lubrication, two-dimensional images and energy spectra of the photons emitted from the sliding contact has been investigated under perfluoropolyether (PFPE) oil lubrication in a tribosystem of a diamond pin sliding on a sapphire disk in the atmospheric ambient air pressure and in vacuum. Two-dimensional image of the tribophoton clearly showed the plasma generation under PFPE oil lubrication. The UV photon energy spectrum and disappearance of the UV photon image in vacuum showed that the plasma is generated by air discharge even under oil lubrication.

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Yaguo, Lyu, Shen Jieyang, Liu Zhenxia und Hu Jianping. „The Improvement of Air/Oil Separator Performance in the Aero-Engine Lubrication System“. In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64327.

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Air/oil separator plays an important role in the aero-engine lubricating oil system, and connects oil cavity and atmospheric environment, where it is used to separate oil from oil-gas two-phase flow and reduce the consumption of lubricating oil. Oil-gas separation efficiency and flow resistance are two key performance parameters of the separator. This paper focuses on how to improve the separation efficiency of one certain air/oil separator, which has many venting holes, under the condition of keeping the stability of flow resistance. Based on the mathematical model, a large number of numerical calculations were carried out using the ANSYS-Fluent. The characteristics of oil-gas separation efficiency, flow resistance were achieved firstly, although the venting holes number changes from 4 to 15, but the holes total flow area is constant, under the same operate condition. In addition, the separation efficiency for single diameter oil droplet was also calculated when the venting holes number changes. The results show that increase the venting holes can effectively reduce the minimum oil droplets diameter which could be separated, improve the separation efficiency and maintain steady flow resistance at the same time. The result of this study may provide an idea or method for the optimization and improvement of Air/oil separator with similar structure.

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Steimes, Johan, François Gruselle und Patrick Hendrick. „Performance Study of an Air-Oil Pump and Separator Solution“. In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68895.

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Many applications need to extract a certain phase from a multiphase flow like in oil extraction, flow in nuclear power plants, aircraft lubrication systems, etc. The Aero-Thermo-Mechanics (ATM) Department of Universiteé Libre de Bruxelles (ULB) is developing an original system to extract the gas from a liquid-gas flow together with increasing the pressure of the liquid phase. This system will help to reduce the complexity and the oil consumption of aeroengine lubrication systems. This paper will summarise the results of a first air/oil prototype. It will also present the guidelines learned from this prototype and used to design a second version of the integrated pump and separator. A newly developed oil consumption measurement system will also be presented. Based on previous results, on litterature review and on an in-house theoretical model, the paper will explain theoretically how the separation efficiency is affected by the particle distribution at the inlet of the prototype, and by the key parameters identified in different studies. Finally the conclusions will present the lessons learned through the design and tests of these two prototypes and the future work will be presented.

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Ni, Ben, und John Pieprzak. „Transportation and Transformation of Air Bubbles in Aerated Oil through an Engine Lubrication System“. In 2004 Powertrain & Fluid Systems Conference & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-01-2915.

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Steimes, Johan, François Gruselle und Patrick Hendrick. „Study of an Air-Oil Pump and Separator Solution for Aero Engine Lubrication Systems“. In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94483.

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Lubrication system of aero engines have to manage a two-phase flow of oil and air created in air-sealed bearing chambers. A part of this flow goes through scavenge pumps and a de-aerator before returning to the tank, the other part passes through a de-oiler before leaving the engine. The Aero-Thermo-Mechanics Department of Université Libre de Bruxelles is developing an original and integrated system to pump and separate a liquid-gas flow. This system helps to reduce the complexity and the oil consumption of aero-engine lubrication systems by replacing the de-oiler, the de-aerator and scavenge pumps. The prototype is composed of an axial part (blades and metallic foam) that performs the separation and a radial part that pressurize the liquid. De-oiling efficiency is measured with a radio-tracer measurement system. This paper presents the test results of four configurations (different radii, flow paths, size of the metallic foam). Droplet size measurements at the inlet and the outlet of the prototype are also presented. A physical interpretation has been developed and is presented.

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Cui, Li, und Jingui Wan. „Study on Temperature Control Method of High Speed Ball Bearing with Oil-Air Lubrication“. In 2017 4th International Conference on Information Science and Control Engineering (ICISCE). IEEE, 2017. http://dx.doi.org/10.1109/icisce.2017.262.

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Goto, Hozumi, und Claudiu Valentin Suciu. „Tribological Characteristics of the Aluminum-Silicon Alloy Impregnated Graphite Composite Under Insufficiently Lubricated Reciprocating Sliding Conditions“. In ASME/STLE 2009 International Joint Tribology Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/ijtc2009-15061.

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Tribological characteristics of Al-Si alloy impregnated graphite composite (ALGR-MMC) in contact with bearing steel were investigated under insufficiently lubricated reciprocating sliding conditions. Ball (JIS SUJ2 bearing steel) on disk (ALGR-MMC) type wear tests were conducted under unlubricated conditions, i.e., in air with high (70%) and low (≤ 1%) relative humidity (RH), under drop-feed lubrication, i.e., oil-drops were deposed on the disk surface before commencing the tests, and under immersion lubrication, i.e., the ball-on-disk contact was submerged in a oil (SAE30) bath. Reciprocating sliding movement was maintained, under a contact load of 40 N at a frequency of 3.3 Hz and amplitude of 3.5 mm, for 100,000 cycles. Tribological properties were continuously monitored. Variation of the kinetic friction coefficient (KFC) versus the number of reciprocating cycles (NRC) was obtained for various amounts of oil (lubrication conditions) and two values of the air RH. For drop-feed lubrication the KFC has at beginning the same value as that under immersed lubrication, but if breakdown of the oil film has occurred after a certain NRC, it increases towards the value corresponding to unlubricated conditions. Connected to the oil film breakdown, there is a certain transition range, expressible both in terms of the oil amount and NRC. Minimum quantity of oil to avoid the film breakdown was found. Due to its self-lubricating properties, ALGR-MMC was able to endure adverse lubrication conditions such as insufficiently lubricated reciprocating sliding.

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Zhang, L. X., T. Liu und C. Q. Li. „The Effects of oil-gas Lubrication Air Pressure on the Bearing Temperature of Motorized Spindle“. In 2nd Annual International Conference on Advanced Material Engineering (AME 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/ame-16.2016.12.

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