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Wyszukujesz frazę "oil viscosity" wg kryterium: Temat


Tytuł:
The experimental study of the effect of magnetically sensitive elastomers on oil recovery of reservoirs containing high-viscosity oils
Badania eksperymentalne wpływu wrażliwych magnetycznie elastomerów na wydobycie ze złóż rop naftowych o wysokiej lepkości
Autorzy:
Mustafayeva, Rena E.
Powiązania:
https://bibliotekanauki.pl/articles/31343979.pdf
Data publikacji:
2023
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
magnetic field
high-viscosity
silicone
oligomer
oil
polymer
physicochemical properties
pole magnetyczne
wysoka lepkość
silikon
olej
polimer
właściwości fizykochemiczne
Opis:
In world practice, low-viscosity oil accounts for the main share of production. As the development progresses, the share of high-viscosity oil in the total balance increases year on year. The growing unused reserves of high-viscosity oil oblige researchers to solve the issue of developing these reserves, which is an important task for the oil industry. Studies have been carried out to increase oil recovery during the development of oil reservoirs containing high-viscosity oil by pumping a solution of magnetically active polymer, namely silicone oligomer, the matrix of which contains 5–25% Fe+3 ions, treated with a constant transverse magnetic field with a strength of H = 51740 A/m. A mixture of 90% by weight of quartz sand and 10% by weight of bentonite clay, with a permeability of k = 1.4 D, was used as a reservoir model. The high-viscosity oil model consisted of St-45 aviation oil. A silicone oligomer of 159–360 brand was used as a matrix with an operating temperature range of 60°C to +300°C, into which particles of gamma-Fe2O3 Nano powder with a size of 0.5 nm are introduced, with a degree of filling of the matrix of 5–25% by volume of Fe. Magnetization saturation is 80 emu/g, residual magnetization is 460 emu/g, and coercive force is 670 Oh. Validation of the proposed method was carried out by physical modeling of the process of displacement of high-viscosity oil with a magnetic elastomer on a laboratory installation. The oil recovery coefficient was calculated according to a wellknown method. The use of magnetically sensitive polymer can be an effective method of developing heavy oil fields. For each heavy oil field, taking into account its specifics (reservoir properties of the rock, physicochemical properties of oil, etc.), an appropriate magnet active polymer is selected. As the experimental results show, the best indicator of the oil recovery coefficient is achieved at 65%, compared with 48% of recovery in the absence of magnetic field exposure.
W praktyce światowej główną część produkcji stanowią ropy o niskiej lepkości. W miarę postępu rozwoju udział rop o dużej lepkości w ogólnym bilansie rośnie z roku na rok. Rosnące niewykorzystane zasoby ropy naftowej o wysokiej lepkości obligują badaczy do rozwiązania kwestii zagospodarowania tych zasobów, co jest ważnym zadaniem dla przemysłu naftowego. W czasie zagospodarowania złóż ropy naftowej o dużej lepkości prowadzone były badania nad zwiększeniem wydobycia ropy poprzez tłoczenie roztworu magnetycznie aktywnego polimeru, jakim jest oligomer silikonowy, którego matryca zawiera 5–25% jonów Fe+3, poddanego działaniu stałego poprzecznego pola magnetycznego o natężeniu H = 51740 A/m. Jako model złoża zastosowano mieszaninę: 90% mas. piasku kwarcowego i 10% mas. glinki bentonitowej, o przepuszczalności k = 1,4 D. Modelem ropy o dużej lepkości był olej lotniczy St-45. Jako matrycę o zakresie temperatur pracy od 60°C do +300°C zastosowano oligomer silikonowy marki 159–360, do którego wprowadzone zostały cząsteczki nanoproszku gamma-Fe2O3 o rozmiarach 0,5 nm, a stopień wypełnienia matrycy jest w zakresie 5–25% obj. Fe. Nasycenie magnetyczne wynosi 80 emu/g, namagnesowanie szczątkowe wynosi 460 emu/g, a siła koercji wynosi 670 Oh. Walidację proponowanej metody przeprowadzono poprzez fizyczne modelowanie procesu wypierania oleju o dużej lepkości elastomerem magnetycznym w instalacji laboratoryjnej. Współczynnik odzysku oleju obliczono według znanej metody. Zastosowanie magnetycznie czułego polimeru może być skuteczną metodą zagospodarowania złóż ciężkich rop. Dla każdego złoża ciężkiej ropy naftowej, biorąc pod uwagę jego specyfikę (właściwości skały zbiornikowej, właściwości fizykochemiczne ropy itp.), dobierany jest odpowiedni polimer magnetycznie aktywny. Z eksperymentu wynika, że najlepszy współczynnik odzysku oleju osiągnięto na poziomie 65%, w porównaniu z 48% odzysku przy braku ekspozycji na pole magnetyczne.
Źródło:
Nafta-Gaz; 2023, 79, 2; 110-113
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the kinetics of changes in selected physicochemical indicators of engine oil in operation
Autorzy:
Chmielewski, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2097596.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
internal combustion engine
cylinder liner
engine oil
kinematic viscosity
silnik o spalaniu wewnętrznym
tuleja cylindrowa
olej silnikowy
lepkość kinematyczna
Opis:
The article presents the results of operational tests of engine oil, including the observation of changes in the values of selected physicochemical parameters of oil in subsequent operation cycles, in accordance with the service life specified by the vehicle manufacturer. Preliminary analysis of defined indicators characterizing the condition of engine oil were performed in terms of their suitability for the ongoing monitoring of the technical condition of the engine. On the basis of the values of selected indicators of fresh oil recorded in the course of operational tests and during replacement, one indicator was selected, the kinematic viscosity at 100°C, for which an unambiguous trend of changes was observed during the tests. The last stage was to verify the hypothesis about the correlation between the observed changes in the value of the indicator and the mileage of the engine-vehicle.
Źródło:
Combustion Engines; 2022, 61, 1; 24--29
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of radial slide bearings with a floating ring considering the physical properties of oil
Autorzy:
Mazurkow, Aleksander
Homik, Wojciech
Konieczny, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2203874.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
floating ring bearing
oil viscosity
radial slide bearing
łożyskowanie ślizgowe z panewką
lepkość oleju
łożysko poprzeczne ślizgowe
Opis:
Radial slide bearings are typically used in turbochargers (among other applications), owing to their simple design and advantages, such as good heat dissipation from the working zone, high stability of operation and low resistance to motion. The current research is both experimental and theoretical. In a state of static equilibrium, the operation of a bearing can be described using a system of five coupled differential equations. The bearing’s operating parameters are related to the type of oil used. Two types of oil, VG46 and VG68, were used for testing. In accordance with the applicable standard, the tolerance of kinematic viscosity of oils is ±10%. The results imply a significant influence of the oil class and viscosity tolerance on the resistance to motion caused by internal friction forces in the oil. In conclusion, it seems advisable that the calculation procedures currently in use should include the slide bearing design optimisation by taking the resistance to motion in the bearing into account.
Źródło:
Transport Problems; 2022, 17, 4; 27--40
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of oil feeding type and oil grade on the oil film bearing capacity
Autorzy:
Mazurkow, Aleksander
Witkowski, Waldemar
Kalina, Adam
Wierzba, Bartłomiej
Oleksy, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1841683.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
hydrodynamic bearing
oil feeding method
static characteristics
viscosity
VG oil grade
relavity eccentrity
THD
Opis:
Two types of hydrodynamically lubricated plain journal bearings were subject to examination differing in the method used to feed them with oil. The first type was fed from a lubrication pocket and the second from the bearing face side. Mathematical models were developed with two-way oil flow allowing to determine the oil film bearing capacity, the maximum pressure, the maximum temperature, and the film oil minimum height for given position of journal relative to solid bush. Static characteristics were developed used in the further course of the study to compare operating parameters of the considered types of bearings. Another issue considered in the paper is the effect of oil VG grade on bearing performance with conditions of oil feeding taken into account and results of the research presented.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 2; 381-386
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie skuteczności warstwy przeciwkorozyjnej wytworzonej przez olej ochronny o niskiej lepkości w warunkach polowych
Field examination of the effectiveness of the corrosion layer formed by the protective oil of low viscosity
Autorzy:
Frydrych, Jarosław
Ziółkowska, Monika
Powiązania:
https://bibliotekanauki.pl/articles/1834040.pdf
Data publikacji:
2020
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
korozja
olej ochronny
czasowa ochrona
lepkość kinematyczna
badania polowe
corrosion
protective oil
temporary protection
kinematic viscosity
field tests
Opis:
The phenomenon of atmospheric corrosion of metals causes significant economic losses in the economy of most developed countries. In order to reduce them, many methods have been developed that use physical phenomena and chemical reactions to protect metal surfaces against corrosion. One of the methods that use the phenomenon of physical protection is temporary protection of metals with lubricants, i.e. plastic greases and lubricating-protective oils. Plastic greases are characterized by a very high kinematic viscosity and create tight and thick protective layers on the surface of metals. Protective oils intended for temporary protection are designed to create a tight, thin, well-adhering protective layer on the metal surface. Temporary protection of metals against corrosion with protective oil consists in covering the metal surface with easily removable lubricants, whose task is to create a tight protective layer separating the surface of the protected metal from the adverse effects of weather conditions. Temporary metal protection is also used in the case of corrosion protection of intermediates between production stages, and in the case of finished products, e.g. during storage and transport. One of the most important features of protective oils is the formation of a thin protective layer on the metal surface to separate the metal surface from the surrounding air. This protective layer is produced by protective oils of low kinematic viscosity. Due to the lack of any requirements for operational tests for protective oils in real conditions, an attempt was made to develop such a methodology and verify it by conducting a field test. The article describes a method of testing the effectiveness of metal protection against corrosion in field conditions. The method of preparing the surface of selected elements for corrosion protection and the method of applying a protective layer on metal plates of a simple shape and with a complex surface shape are described. The description of the test stand as well as the method of selecting the places of exhibition are included. The results of the conducted study are presented. The obtained test results are of an application nature.
Źródło:
Nafta-Gaz; 2020, 76, 12; 969--976
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improved fleet operation and maintenance through the use of low viscosity engine oils: fuel economy and oil performance
Poprawa efektywności eksploatacji floty dzięki zastosowaniu olejów silnikowych o niskiej lepkości: oszczędność paliwa i wydajność oleju
Autorzy:
Macián, Vicente
Tormos, Bernardo
Bastidas, Sophia
Pérez, Tomás
Powiązania:
https://bibliotekanauki.pl/articles/301233.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
low viscosity engine oils
fuel economy
real working conditions
oil performance
engine wear
oleje silnikowe o niskiej lepkości
oszczędność paliwa
rzeczywiste warunki pracy
wydajność oleju
zużycie silnika
Opis:
For heavy-duty vehicles and road transportation, fuel consumption and associated CO2 emissions have been of great concern, which has led to the development and implementation of technologies to reduce their impact on the environment. Low viscosity engine oils have arisen as one proven cost-effective solution to increase the engine efficiency; however, for the heavy-duty vehicle segment, engine protection against wear is a priority for end-users, and therefore there is some reluctance to the use of that new oil formulations. In this study, eight lubricant oils, representative of the HTHS viscosity reduction that heavy-duty oils have been undergoing and new API CK-4 and FA-4 categories, were evaluated for fuel economy, oil performance and engine wear, in a long-term test involving a fleet of 49 heavy-duty vehicles of four different engine technologies, some of them with diesel fuel and others with compressed natural gas. Results of fuel economy were positive for most of the buses’ models. Regarding oil performance and wear, most of the formulations were found to be suitable for extended oil drain intervals (ODI); and although no alarming results were found, overall performance of the formulations of the fourth stage could lead to significant wear if the oil drain interval is extended. In this study, it should be noted that some of the information has been presented by the authors in other publications, here they are presented with the purpose of complementing the new results and summarize the entire test.
W przypadku pojazdów o dużej ładowności, i transportu drogowego w ogóle, ważny problem stanowi zużycie paliwa i związana z nim emisja CO2, które wymagają opracowywania i wdrażania technologii zmniejszających ich wpływ na środowisko. Jednym ze sprawdzonych i finansowo korzystnych rozwiązań w tym zakresie są oleje silnikowe o niskiej lepkości, które zwiększają wydajność silnika. Jednak w segmencie pojazdów ciężkich, priorytetem dla użytkowników końcowych jest ochrona silnika przed zużyciem, co pociąga za sobą niechęć do stosowania tych nowych preparatów olejowych. W pracy, przedstawiono badania ośmiu olejów smarowych o obniżonej lepkości wysokotemperaturowej HTHS reprezentatywnych dla produkowanych obecnie kategorii olejów do pojazdów ciężkich, z uwzględnieniem nowych kategorii oleju API CK-4 i FA-4. Oleje oceniano pod kątem oszczędności paliwa, wydajności oleju i zużycia silnika w badaniu długoterminowym obejmującym flotę 49 autobusów o silnikach opartych na różnych technologiach, z których część była zasilana olejem napędowym a część sprzężonym gazem ziemnym. Wyniki dotyczące oszczędności zużycia paliwa były pozytywne dla większości modeli badanych autobusów. Jeśli chodzi o wydajność oleju i zużycie silnika, większość preparatów okazała się być przystosowana do dłuższych okresów wymiany oleju; chociaż nie zaobserwowano niepokojących wyników, to jednak ogólna wydajność preparatów w czwartym etapie testu, mogłaby prowadzić do znacznego zużycia silnika przy wydłużeniu okresu wymiany oleju. Część przedstawionych danych publikowaliśmy już w innych pracach. Niniejszy artykuł stanowi uzupełnienie poprzednich wyników oraz podsumowanie całego badania.
Źródło:
Eksploatacja i Niezawodność; 2020, 22, 2; 201-211
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel castor oil – based deep eutectic solvent: Synthesis and physicochemical property determination
Autorzy:
Usman, Mohammed Awwalu
Nkpuluaku, Chukwuemeka
Ajayi, Toluwalase Olufunmilayo
Powiązania:
https://bibliotekanauki.pl/articles/1031226.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Castor oil
choline chloride
deep eutectic solvent
density
refractive index
viscosity
Opis:
The physicochemical properties of a deep eutectic solvent (DES) and thus its area of application are influenced by the nature salt or hydrogen bond acceptor (HBA), hydrogen bond donor (HBD), molar ratio, temperature and water content. The search for and discovery of new HBD would further widen the scope of DES versatility. In this study, the capacity of castor oil to serve as HBD and form DES with choline chloride (ChCl) was investigated. ChCl and castor oil were mixed in four molar ratios, namely 1:1, 1:2, 1:3, and 1:4. DES was formed at 1:3 and 1:4 molar ratios and code-named DES1 and DES2, respectively. The physicochemical properties of both DESs were measured as a function temperature from 313 K to 353 K. The results indicate that the densities of these castor oil-based DESs are uniquely low when compared to other DESs and ionic liquids. Their physicochemical properties generally follow the known trend for other DES, in terms of temperature variations. The viscosity, conductivity, surface tension and refractive index of castor oil based-based DES all fall within the known range for other choline chloride-based DESs. Based on its pH values, castor oil based DES is a Bronsted acidic deep eutectic solvent. This discovery offers significant potential to expand the possible combinations of salts and HBDs and further increase the areas of application of this solvent.
Źródło:
World Scientific News; 2020, 148; 46-59
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Olej ochronny o niskiej lepkości do czasowej ochrony elementów metalowych przed korozją
Low viscosity protective oil for temporary protection of metal components against corrosion
Autorzy:
Ziółkowska, Monika
Frydrych, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1833974.pdf
Data publikacji:
2020
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
korozja
olej ochronny
czasowa ochrona
lepkość
elementy metalowe
inhibitor korozji
corrosion
protective oil
temporary protection
viscosity
metal components
corrosion inhibitor
Opis:
Corrosion of metals is the gradual destruction of metal under the impact of environmental factors. Chemical or electrochemical processes on the surface of the metal cause irreversible changes in the structure of the metal. To prevent this, during storage or transport, the surfaces of metal elements must be protected against environmental factors, which include: high air humidity, acid rain and variable temperature. These factors accelerate the corrosion process, which cannot be eliminated, but can be reduced by protecting metal elements with e.g. protective oils. Some metals have the ability to passivate, which is a natural protective agent that prevents corrosion. It consists in the formation of an oxide of this metal on the metal surface. Where there is no natural protection against corrosion, protective measures must be used. This paper presents the technology for the production of protective oil for temporary protection against corrosion. The innovation of this project is that the oil will form a thin, well adhering protective layer on the metal surface, which can be easily removed. It is characterised by very low viscosity and low dripping time. It is possible to achieve by using proper base oil with carefully selected anti-corrosion additives. Based on the standard PN-75/C-04154 Petroleum products. Rust protection by metal preservatives the humidity cabinet test method, corrosion tests were carried out. The paper presents the results of a humidity cabinet test for an oil mixture based on deeply refined base oil and properly selected refining additives. The test results confirmed very good anti-corrosive properties of the developed oil due to the use of a corrosion inhibitor and an oxidation inhibitor. The thickness of the protective layer formed on the metal surface was calculated based on a mathematical formula. The resulting layer forms a thin oil film, easy to remove and protecting the metal surface from corrosion.
Źródło:
Nafta-Gaz; 2020, 76, 11; 864--869
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of processes in crude oil treated with low-frequency sounds
Modelowanie procesów oczyszczania surowej ropy naftowej wykorzystujących dźwięki o niskich częstotliwościach
Autorzy:
Blinayeva, Yelena
Smailova, Saule
Powiązania:
https://bibliotekanauki.pl/articles/407885.pdf
Data publikacji:
2019
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
crude oil
low frequency sound
kinematic viscosity
surowa ropa naftowa
dźwięk o niskiej częstotliwości
lepkość kinematyczna
Opis:
These days new methods of purification of crude oil from paraffin are being sought to improve the quality of oil, reduce its cost and optimize the processes of technological preparation of oil. The paper describes the method of conducting an experiment to study the impact of low-frequency sounds on oil samples of the Zhanazhol field, and presents the results of experiments, the input parameters of the experiment (exposure time and frequency of infrasound), at which the maximum reduction of the kinematic viscosity of oil is achieved. Further study of processes in crude oil under the influence of low-frequency sounds is planned to be investigated in COMSOL Multiphysics®.
Obecnie poszukiwane są nowe metody oczyszczania surowej ropy naftowej z parafiny, prowadzące do obniżenia kosztów i optymalizacji procesów przetwarzania ropy naftowej. W artykule opisano sposób prowadzenia eksperyment polegającego na badającego wpływ dźwięków o niskiej częstotliwości na parametry próbek ropy naftowej pochodzące z pola Zhanazhola. Przedstawiono wyniki doświadczeń, parametry wejściowe eksperymentu (czas ekspozycji i częstotliwość infradźwięków), przy których osiągane jest maksymalne obniżenie lepkości kinematycznej ropy naftowej. Dalsze badania procesów zachodzących w ropie naftowej pod wpływem dźwięków o niskiej częstotliwości planowane są w środowisku COMSOL Multiphysics.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2019, 9, 2; 50-53
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research into the effects of the effective microorganisms addition on the engine oil viscosity
Autorzy:
Krakowski, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/246239.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
petroleum products
oil viscosity
engine oil
microbiological contamination
effective microorganisms
Opis:
In the article, changes in the properties of oils during operation were characterized. The main reason for this is the continuous aging process of the used oil caused by the interaction of oxygen contained in the air, which reacts relatively easily with hydrocarbons and the oxidation process is accelerated just by high temperature. Then the problem of microorganisms occurring in petroleum products and their effect on the properties of oils and the operation of the internal combustion engine was presented. The next part of the article presents effective microorganisms, i.e. what they are and how they work, in particular, their composition and appropriate development conditions. In addition, some of their specific applications were briefly described. In the next part of the article, the research methodology, applied oil samples with additives of effective microorganisms, both for fresh oil and used oil were described. In addition, the measuring test stand with instrumentation and measuring device was shown. The main part of the article contains the characteristics of dynamic viscosity as a function of temperature for fresh oil and used oil compared with oils with the addition of microorganisms in liquid form and ceramic tubes. The developed graphs enabled analysis of the effect of the addition of microorganisms on oil viscosity as ecological products.
Źródło:
Journal of KONES; 2019, 26, 3; 105-112
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The full or partial replacement of commercial marine engine oil with bio oil, on the example of linseed oil
Autorzy:
Malinowska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/243510.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
biolubricant
vegetable oil
linseed oil
engine oil
marine
mineral oil
inedible oil
viscosity
flash point
Opis:
The bio-oils are considered to sustainable, alternative and environmentally friendly source of lubricants compared to commercial engine oils, on the base a mineral, synthetic or semi-synthetic. They are obtained from natural raw material (vegetable or animal oils), which are renewable and non-toxic to humans, living organisms and environment. The vegetable oils called green oils, natural oils, bio-oils or natural esters. They can be obtained from plant seeds, that may be consumed – edible oils (for instance: rapeseed oil) or which cannot be consumed – inedible (for example: linseed oil). The conducted research into linseed oil and its different quantity additives (25% and 50%) to commercial marine mineral oil intended for a medium-speed 4-stroke, trunk marine engine (i.e. Marinol RG 1240). The flash point and dependence of viscosity and temperature were compared and assess. It has been proven that vegetable oils have a high ignition temperature and very small viscosity change in the range of temperatures presented, i.e. high viscosity index. According to the results, it can be recommended the addition of 25% linseed oil in the base lubricant is the relevant for lubricating a medium speed 4-stroke marine engine. The vegetable additives can improve a viscosity index a lube oil, and they will be positively affected environmental protection
Źródło:
Journal of KONES; 2019, 26, 3; 129-135
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction losses in a linear hydraulic motor as a result of the influence of the control structure and oil viscosity
Autorzy:
Skorek, G.
Powiązania:
https://bibliotekanauki.pl/articles/241950.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
friction force
mechanical losses
energy efficiency
oil viscosity
hydrostatic drive
hydraulic cylinder
Opis:
The problem of energy tests of hydraulic systems with hydraulic cylinders, seemingly simple displacement machines, is more complex than that of rotary hydraulic systems. The results of the researches provide an insight into the impact of external loads, required speed, structure of the power supply system, viscosity of hydraulic oil on friction loss, and the efficiency of cylinder drive. The hydraulic cylinder is the strongest structure in the system. Failure of the system is most likely due to failure of the pump supplying the cylinder. The high load of the pump is often caused by the very low energy efficiency of the cylinder, which, despite a relatively low external load, requires high inlet pressure due to large mechanical losses of friction between the piston and the cylinder and between the piston rod and gland. These losses depend on the type of seal used, its shape, the material it is made from, pre-clamp, and the operating parameters of the cylinder. Improperly sealed or assembled seals can cause energy losses of up to 25%. Due to the use of moving seals in the hydraulic cylinder, its energy behaviour is completely different compared to the energy behaviour of a rotary motor, which does not have any seals. The friction force connected with the work of the sealing joints and the mechanical efficiency of the cylinder are determined not only by the external load but also by the method of the applicable supply of the cylinder resulting from the throttling structure, and in particular the pressure level generated in the discharge chamber of the cylinder.
Źródło:
Journal of KONES; 2018, 25, 4; 377-384
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical properties improvement of the diesel engine lubricant oil reinforced nanomaterials
Autorzy:
Hadi, N. J.
Al-Hussain, R. K. A.
Powiązania:
https://bibliotekanauki.pl/articles/95364.pdf
Data publikacji:
2018
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
lubricant oil
nanofluids
viscosity
thermal conductivity
thermal images
tribology
oleje smarowe
nanopłyny
lepkość
przewodność cieplna
termogram
tribologia
Opis:
This research focuses on the effect of nanomaterials on the physical properties of a local Iraqi lubricant oil (20W-50), which is widely used in diesel engines. The concentrations of 0.001, 0.2 and 0.5 wt% of Al2O3 NPs and CNT are dispersed in the oil with the help of a suitable surfactant using a magnetic stirrer and a sonication process. The density, surface tension, dynamic viscosity, kinematic viscosity, flash point, fire point, pour point, thermal conductivity, thermal images, wear and the coefficient of friction of the oil with and without nanomaterials are tested. The results were shown that the higher concentrations of NPs, the better properties for the engine oil. The density for Al2O3 nanooil indicates a small change at 0.001 and 0.2 wt%, and a decrease at 0.5 wt% ratio. Also, the density of CNT oil shows a slight change at 0.001and then decreasing at 0.2 and 0.5 ratios. In addition, the surface tension of both nanooils are increased. The dynamic viscosity slightly change with an addition of the NPs especially at 20°C and 30°C. Also, there is a convergence in the viscosity values between base and nanooils at 40°C and 50°C. Also, the dynamic viscosity indicates shear thickening behavior at low shear rate, while in the high shear rate the viscosity attempts to be more stable. The kinematic viscosity increases with an increased concentration of the NPs at 40°C and 100°C for both nanooils. The flash and fire point are increasing for both nanooils and Al2O3 nanooil indicates a lower pour point than that of CNT oil. CNT oil indicates higher dissipating heat friction and thermal conductivity than that of Al2O3 nanooil. Thermal images are supported by thermal conductivity and flash point behavior, while the tribology tests are compatible with viscosity behavior. A significant reduction in the coefficient of friction and wear loss is produced for both nanooils.
Źródło:
Journal of Mechanical and Energy Engineering; 2018, 2, 3; 233-244
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evaluation of viscosity properties of engine oil – Marinol RG 1240 after working in various types of engines
Autorzy:
Malinowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/243577.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
engine oil
viscosity
marine engine
lubricating system
rheometer
Marinol RG 1240
olej silnikowy
lepkość
silnik okrętowy
układ smarowania
reometr
Opis:
The lubricating oils are a liquid substance, consisting of a base (mineral, synthetic or vegetable) and selected additives. They can used for lubricate internal combustion engines, so they called – engine oils. For proper functioning of the engine, lubricating oil have to fulfil basic requirements: the main function is to enable the formation of a film of oil between the moving parts which reduces friction and wear, assisting in cooling, keeping the compression ratio, reducing corrosion, filling in all micro ridges on the surface of cooperating components, sealing the combustion chamber etc. The most significant property of any lubricating oil is viscosity, which is the measure of its resistance to gradual deformation by shear stress or tensile stress. The important feature is that property of viscosity changes during the exploitation process of oil, it may increase and decrease. That is why, for engines it is important not only to choose the type of oil correctly but also to frequent monitor the viscosity. In the article, the author shows how the viscosity of marine engine oils changes after working in different types of engines. The experiments were conducted using the method of the rheometer Haake Mars III of Thermo Scientific. The samples of engine oil – Marinol RG 1240 were collected after various periods of use in three different engine types Cegielski- Sulzer.
Źródło:
Journal of KONES; 2018, 25, 1; 275-281
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany lepkości olejów silnikowych w ciągnikach rolniczych
Changes in the viscosity of engine oils in agricultural tractors
Autorzy:
Chomik, Zdzisław
Smoleń, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/883003.pdf
Data publikacji:
2018-08-31
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
maszyny rolnicze
ciagniki rolnicze
olej silnikowy
lepkosc dynamiczna
lepkosc kinematyczna
zmiany lepkosci
zanieczyszczenia stale
engine oils
dynamic viscosity
kinematic
oil contaminants and their causes
oilmonitoring
Opis:
W artykule omówiono istotne zagadnienia dotyczące zmian lepkości dynamicznej i kinematycznej olejów silnikowych w czasie eksploatacji pojazdów rolniczych, ich monitorowania oraz służących do tego celu narzędzi. Zwrócono uwagę na coraz większe wymagania i obciążenia, jakim podlega olej silnikowy w nowoczesnych silnikach ciągników rolniczych. W silnikach spalinowych lepkość decyduje o stopniu uszczelnienia tłoka w cylindrze, skuteczności chłodzenia silnika oraz o możliwości uruchomienia zimnego silnika. Badania polegały na określeniu lepkości próbek olejów mineralnych i syntetycznych pobranych z silników ciągników o zbliżonych przebiegach. Wszystkie próbki pochodziły z turbodoładowanych silników o zapłonie samoczynnym serwisowanych w autoryzowanych stacjach obsługi pojazdów. Przeprowadzone badania wskazują na konieczność bieżącego monitorowania stanu lepkościowego olejów.
The article discusses important issues regarding changes in dynamic viscosity and kinematic viscosity of engine oils during the operation of agricultural vehicles, their monitoring and tools used for this purpose. Attention has been paid to the increasing requirements and loads of lubricating oil in modern engines of agricultural tractors. In combustion engines, viscosity determines the degree of piston sealing in the cylinder, the efficiency of engine cooling and the possibility and start-up of a non-heated engine. The tests consisted in determining the viscosity of mineral and synthetic oils collected from tractor engines with similar mileages. All samples came from turbocharged, self-ignition engines serviced at authorized service stations. The conducted research indicates the necessity of ongoing monitoring of the viscosity status of oils.
Źródło:
Technika Rolnicza Ogrodnicza Leśna; 2018, 4; 20-23
1732-1719
2719-4221
Pojawia się w:
Technika Rolnicza Ogrodnicza Leśna
Dostawca treści:
Biblioteka Nauki
Artykuł

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