Used Lubricating Oil
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. DETERMINAÇÃO DOS PARÂMETROS CINÉTICOS E SIMULAÇÃO COMPUTACIONAL DO PERFLUOROPOLIÉTER (PFPE) EMPREGADO COMO LUBRIFICANTE SINTÉTICO
This work aims to determine the kinetic parameters of the thermal decomposition of a lubricating grease based on perfluoropolyether (PFPE) and the computational simulation of this decomposition. The determination of kinetic parameters of thermal decomposition was done by thermal analysis using thermogravimetry (TG) at different heating rates (β) of 10, 15 a
Quím. Nova. Publicado em: 26/08/2019
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2. Evaluation of the oil flow using the MQL technique applied in the cylindrical plunge grinding of AISI 4340 steel with cbn grinding wheel
Abstract The grinding process is defined as an abrasive cutting action of a tool known as grinding wheel, which is submitted to high rotations, promoting excellent finishing and accuracy in dimensions, respecting the parameters established in each project. During the machining, the cutting edges of the abrasive grains undergo wearing and this increases the c
REM, Int. Eng. J.. Publicado em: 2018-07
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3. Influence of water in the MQL technique in the grinding of steel AISI 4340 using CBN wheels
Abstract Usually, machining employs cooling methods to avoid high temperatures. In most cases, the cutting fluid is applied with high flow and low pressures. This technique consumes a large amount of cutting fluid that causes serious problems in the environment and in the health of the worker. An alternative to the conventional cooling method is the Minimum
REM, Int. Eng. J.. Publicado em: 2018-07
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4. ELEMENTAL DETERMINATION IN LUBRIFICANT OIL AND FUEL OIL BY ICP OES AND DRC-ICP-MS / DETERMINAÇÃO ELEMENTAR EM ÓLEO LUBRIFICANTE, ÓLEO COMBUSTÍVEL E BIODIESEL POR ICP OES E DRC-ICP-MS
Neste trabalho, são propostas duas metodologias para análise elementar em óleo lubrificante, óleo combustível e biodiesel, através das técnicas de espectrometria de emissão óptica com plasma indutivamente acoplado e espectrometria de massa com plasma indutivamente acoplado com célula de reação dinâmica. Foram combinadas a facilidade e a rapidez
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2011
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5. Determinação de metais em óleos lubrificantes, provenientes de motores de ônibus urbano, utilizando a FAAS
This work proposed a procedure to examine ashes produced in burning lubricating oils used in public transportation, in Teresina PI. Sulphanilic acid was added to the oil samples, which were burned at 550 °C for three hours and 650 °C for two hours. The ash solutions were analyzed by FAAS and there were significant differences in the metal contents of the w
Química Nova. Publicado em: 2010
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6. Analysis of the influence of sparkout time on grinding using several lubrication/cooling methods
The plunge cylindrical grinding operation has been widely employed in the manufacturing process of components which require excellent surface quality achieved within small ranges of dimensional tolerance. The sparkout time has proved to be an important parameter in this operation, contributing to obtain surfaces with high geometric and dimensional precision.
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03
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7. Application of the Minimum Quantity Lubrication (MQL) technique in the plunge cylindrical grinding operation
Precision cylindrical grinding is used extensively in the manufacture of precision components in the metal-mechanical industry in general. Modern CNC grinding machines have improved this process with respect to the positioning and rigidity of the machine-workpiece-tool system, allowing the production of high precision parts with low dimensional tolerances. B
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03
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8. Coolant lubricity and coolant-lube compatibility with regard to slideway behavior
Coolants are widely used in industries for metal cutting operations. Though there are varieties of coolants available, the most widely used are water-soluble coolants because of their low cost and better heat dissipation compared to straight cutting oils. In the present investigation, amongst the various causes, which deteriorate the coolant, the role of har
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-12
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9. Biossorção utilizando alga marinha (sargassum sp.) aplicada em meio orgânico
No presente trabalho escolheu-se o óleo lubrificante automotivo usado de uma frota de ônibus da cidade de Natal-RN-Brasil. Este óleo foi caracterizado, indicando que os metais contidos em maior concentração são Ferro (Fe) e Cobre (Cu). Para o processo de biossorção utilizou-se a alga marinha feofícea Sargassum sp para se estudar a influênci
Publicado em: 2007
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10. Determinação de contaminantes em óleos lubrificantes usados e em esgotos contaminados por esses lubrificantes
A simple and reliable ashing procedure is proposed for the preparation of used lubricating oil samples for the determination of Zn, Fe, Pb, Ni and Cu by the flame atomic absorption spectrometry technique. Sulphanilic acid was added to oil samples, the mixture coked and the coke ashed at 550 ºC. The solutions of the ash were analysed by flame AAS for these m
Química Nova. Publicado em: 2006-12
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11. Effects of the use of biodiesel on the properties of lubricating oil in a compression-ignition engine / Efeitos do uso do biodiesel sobre propriedades do óleo lubrificante usado em um motor de ignição por compressão
Adding to an ongoing sequence of tests aimed at validating the use of biodiesel (ethyl ester) mixed with diesel in higher proportions in Brazil, this study was conducted to investigate the effects of utilizing a B10 fuel mixture (10% volume biodiesel diluted in diesel) on the degradation of lubricating oil in an aspirated, indirect-injection, 1.9 L compressi
Publicado em: 2006
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12. Estudo da relação entre viscosidade do lubrificante e vibração em uma caixa de engrenagens. / Study of the relation between oil viscosity and vibration in a gearbox.
The crescent implementation, by brazilian industry, of predictive maintenance techniques demands, from vibration analyses processes, more capability for supplying information on the state of equipment. Among the existent analysis procedures for rotative machines, the vibration analysis is one of the more used, being nowadays, present in a wide portion of imp
Publicado em: 2006