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    Wyświetlanie 1-8 z 8
    Tytuł:
    Modelling the load of the piston system in an axial piston pump by means of the Adina software
    Modelowanie obciążenia zespołu tłoczka pompy wielotłoczkowej z wykorzystaniem programu Adina
    Autorzy:
    Zloto, T.
    Stryjewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/793635.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    axial piston pump
    piston-cylinder block
    contact zone
    piston load
    Adina software
    numerical model
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2013, 13, 2
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Load of the kinematic pair piston-cylinder block in an axial piston pump
    Obciazenie pary kinematycznej tloczek-cylinder w pompie wielotloczkowej osiowej
    Autorzy:
    Zloto, T.
    Stryjewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/793176.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    axial piston pump
    piston load
    kinematic pair
    piston-cylinder block
    friction force
    MathCad software
    computation model
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 2
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis and research of piston working conditions of combustion engine in high thermal load conditions
    Autorzy:
    Jankowska-Sieminska, B.
    Jankowski, A.
    Slezak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/243400.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    piston
    thermal load
    thermal expansion
    thermal shock
    Opis:
    Explanation of phenomena occurring in pistons of combustion engines which appear during heating and cooling processes in reference to standard materials and composite materials of high material proprieties is aim of the paper. Bring over researches were mostly directed on measurements of difference dimensions which appear during the piston work in the combustion engine. The paper concentrates on phenomenon of different proprieties of materials. The thermal stresses and shocks differ. In the thermal shock, thermal stresses are caused by instantaneous temperature gradients which appear at high engine speed. These stresses are determined thro temperature distribution and they do not differ from stresses in steady-state conditions. Researches concerning thermal expansions were performed by means of sensitive dilatometer which can work in simple and differential system. Changes of dimensions versus temperature function were measured with inductive sensor and the sensitive Pt-ptrh thermocouple, and results were referred to reference material-Platinum. Research results are illustrated on diagrams of different courses of changes of the of thermal expansion coefficient during heating and cooling of standard and composite materials. Values of the thermal expansion coefficient a for the heating and cooling are smaller for composite alloys. The course of the coefficient â during cooling can be higher or lower from the coefficient a during heating. Similar values were also received. Maximum differences were of 10%. Smaller values of the coefficient a for composite alloys cause that for such the same thermal loads temperature gradients will be smaller for composite alloys. Courses of changes of the coefficient â have a different characteristics suited from chemical composition of alloy, granularity of the composite component and thermal treatment.
    Źródło:
    Journal of KONES; 2007, 14, 3; 233-243
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation Impedance for Square Piston Sources on Infinite Circular Cylindrical Baffles
    Autorzy:
    Valacas, John L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1953533.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    cylindrical baffle
    radiation impedance
    radiation mass-load
    piston source
    Opis:
    The evaluation of complex radiation impedance for a square piston source on an infinite circular-cylindrical baffle is associated to the Greenspon-Sherman formulation for which novel evaluation methods are proposed. Unlike existing methods results are produced in a very wide range of frequencies and source semi-angles with controllable precision. For this reason closed-form expressions are used to describe the truncation errors of all integrals and infinite sums involved. Impedance values of increased accuracy are also provided in tabulated form for engineering use and a new radiation mass-load model is derived for low-frequencies.
    Źródło:
    Archives of Acoustics; 2020, 45, 4; 663-679
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie obciążeń układów korbowych w różnych typach silników tłokowych
    Comparison of loads of crank systems of different types of piston engines
    Autorzy:
    Gwiazda, A.
    Szafraniec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/408959.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Śląska
    Tematy:
    układ korbowy
    silnik tłokowy
    obciążenie
    crank system
    piston engine
    load
    Opis:
    Układy korbowe stanowią zasadniczy element silników tłokowych. Charakterystyka ich pracy decyduje bezpośrednio o charakterystyce pracy całego silnika. W związku z tym w niniejszym opracowaniu przedstawiono analizę obciążeń układów korbowych w różnych typach silników. Wskazano także na wady i zalety każdego z omawianych rozwiązań, które należy ocenić gdyż wpływają na zakres jego wykorzystania.
    Crank systems are the essential part of piston engines. Their operating characteristics directly determine the characteristics of work of the whole engine. Therefore, this study presents an analysis of crankshaft system loads in different types of engines. It also shows the advantages and disadvantages of each of these solutions that should be assessed, because they affect the extent of its use.
    Źródło:
    Wybrane Problemy Inżynierskie; 2011, 2; 107-112
    2083-1021
    Pojawia się w:
    Wybrane Problemy Inżynierskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A model of fuel combustion process in the marine reciprocating engine work space taking into account load and wear of crankshaft-piston assembly and the theory of semi-Markov processes
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/259557.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    engine load
    marine internal combustion engine
    probability
    semi-Markov process
    crankshaft-piston assembly
    Opis:
    The article analyses the operation of reciprocal internal combustion engines, with marine engines used as an example. The analysis takes into account types of energy conversion in the work spaces (cylinders) of these engines, loads of their crankshaft-piston assemblies, and types of fuel combustion which can take place in these spaces during engine operation. It is highlighted that the analysed time-dependent loads of marine internal combustion engine crankshaftpiston assemblies are random processes. It is also indicated that the wear of elements of those assemblies resulting from their load should also be considered a random process. A hypothesis is formulated which explains random nature of load and the absence of the theoretically expected detonation combustion in engines supplied with such fuels as Diesel Oil, Marine Diesel Oil, and Heavy Fuel Oil. A model is proposed for fuel combustion in an arbitrary work space of a marine Diesel engine, which has the form of a stochastic four-state process, discrete in states and continuous in time. The model is based on the theory of semi-Markov processes.
    Źródło:
    Polish Maritime Research; 2016, 3; 50-57
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of operation in piston–con–rod system of ship propulsion engine on the basis of harmonic torque
    Autorzy:
    Rosłanowski, J.
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/247247.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    criteria of mechanical and thermal load of the engine
    tribological criteria of piston-crank combustion
    engine system
    Opis:
    The following article includes the analysis of mechanical and thermal load criteria of combustion engine. Those criteria have been divided into tribological, technical in detail and technical in general. The above criteria have been related to piston-con-rod system, in which, two tribological centres were specified. One centre included, piston-piston rings and cylinder, in which, piston rings serve as labyrinth seal and the cylinder constitutes piston guides. Crank bearings and main bearings of engine crankshaft constitute the second centre. From the point of tribological view, piston-piston rings and cylinder constitute slide and thrust bearing lubricated hydrodynamically, while crankshaft bearings a-c-t as slide and journal bearings also lubricated hydrodynamically. In the description of thermal load of the above-mentioned tribological centres, special attention was paid to criteria that ensure their motion reliability and durability of engine operation. Whereas in the description of mechanical load of elements constituting investigated centres, some criteria were determined resulting from their functionality and fatigue strength of the material they were made of. Criteria of thermal loads were based on mean density flux of heat conducted through the walls of engine elements, paying attention to their low precision of evaluation. It has been emphasized that synthetic criteria indicators are the most precise. They are determined on the basis of engine load measurements during its operation. Those criteria allow us to describe the operating process of con-rod-piston diesel engines and at the same time it is possible to expose their technical condition which is of essential practical meaning. The wear process of tribological centres that takes place during operating in piston-con-rod system, affects the course of engine working process and its techno-economic indicators.
    Źródło:
    Journal of KONES; 2013, 20, 4; 390-395
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Material consumption criteria of piston – con – rod elements system of combustion engine
    Autorzy:
    Rosłanowski, J.
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246321.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    criteria of mechanical and thermal load of the engine
    tribological criteria of piston-crank combustion
    engine system
    Opis:
    The following article includes the analysis of mechanical and thermal load criteria of combustion engine. Those criteria have been divided into tribological, technical in detail and technical in general. The above criteria have been related to piston-con-rod system, in which, two tribological centres were specified. One centre included, piston-piston rings and cylinder, in which, piston rings serve as labyrinth seal and the cylinder constitutes piston guides. Crank bearings and main bearings of engine crankshaft constitute the second centre. From the point of tribological view, piston-piston rings and cylinder constitute slide and thrust bearing lubricated hydrodynamically, while crankshaft bearings a-c-t as slide and journal bearings also lubricated hydrodynamically. In the description of thermal load of the above-mentioned tribological centres, special attention was paid to criteria that ensure their motion reliability and durability of engine operation. Whereas in the description of mechanical load of elements constituting investigated centres, some criteria were determined resulting from their functionality and fatigue strength of the material they were made of. Criteria of thermal loads were based on mean density flux of heat conducted through the walls of engine elements, paying attention to their low precision of evaluation. It has been emphasized that synthetic criteria indicators are the most precise. They are determined on the basis of engine load measurements during its operation. Those criteria allow us to describe the operating process of con-rod-piston diesel engines and at the same time it is possible to expose their technical condition which is of essential practical meaning. The wear process of tribological centres that takes place during operating in piston-con-rod system, affects the course of engine working process and its techno-economic indicators.
    Źródło:
    Journal of KONES; 2013, 20, 4; 397-403
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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