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Wyszukujesz frazę "hydraulic drive and control" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-13 z 13
    Tytuł:
    A concept of pusher - barge coupling device of two-segment ship for inland waterways and coastal service
    Autorzy:
    Dymarski, C.
    Rolbiecki, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/260471.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship devices
    hydraulic drive and control
    Opis:
    This paper presents design assumptions and a constructional concept of the device for coupling the pusher and hotel barge of two-segment inland waterways and coastal ship. The presented device makes it possible to reach either stiff connection or mutually controlled inclination of both segments against each other, which greatly improves the ship’s manoeuvrability and thus safety of navigation especially on narrow and meandering waterways.
    Źródło:
    Polish Maritime Research; 2006, S 2; 76-79
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A concept design of diesel – hydraulic propulsion system for passenger ship intended for inland shallow water navigation
    Autorzy:
    Dymarski, Czesław
    Powiązania:
    https://bibliotekanauki.pl/articles/259998.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion systems
    hydraulic drive and control
    azimuthal propulsion systems
    Opis:
    This paper presents an analysis of environmental and technical conditions necessary for working out a possibly most favourable propulsion system for a two – segment passenger ship intended for navigation between Berlin and Kaliningrad. There are presented various types of propulsion systems for small ships as well as analyzed their possible applications and consequences. In this work there were taken into account system’s reliability, efficiency, dimensions, mass and costs of manufacturing, assembling and possible replacing the system components as well as an impact on maneuverability and natural environment. With taking into account the above mentioned criteria it was finally found that the diesel-hydraulic system fitted with two azimuthal ducted solid propellers is the most favourable. There are also presented a schematic propulsion and control diagram, three-dimensional arrangement drawing of system components as well as assembly drawing of the designed azimuthal propulsion system.
    Źródło:
    Polish Maritime Research; 2019, 3; 30-38
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on a control system based on stepping motor for ship’s controllable pitch propellers
    Autorzy:
    Dymarski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/258652.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship controllable pitch (CP) propellers
    hydraulic drive and control
    control systems
    Opis:
    This paper presents description of a laboratory stand for testing servo-mechanisms of ship low-power CP propellers, as well as a remote control system for such propellers, based on electric stepping motor. Also, are presented results of the first series of tests of the control system, carried out on non-loaded CP propeller by applying stepped values of propeller pitch at two values of rotational speed of the stepping motor.
    Źródło:
    Polish Maritime Research; 2008, 1; 37-41
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A concept of drive and control system of a novel device for people evacuating from large passenger ships
    Autorzy:
    Dymarski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/259429.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship deck equipment
    ship evacuating systems
    life saving appliances systems
    hydraulic drive and control system
    Opis:
    Year-after-year increasing number and size of sea-going passenger ships make it necessary to search for novel methods of evacuation of passengers from such large objects or to improve those which have been applied so far. This paper presents a concept of one of the original methods, in which, a.o., chain lifts have been applied to hold up life boats during voyage as well as to launch them in case of evacuation. Technical assumptions and requirements as well as schematic diagram of the hydraulic drive and control system of the lift, is presented.
    Źródło:
    Polish Maritime Research; 2010, 4; 54-58
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zintegrowany modułowy symulator do badań tribologicznych endoprotez stawu biodrowego
    An integrated modular simulator for the tribologic testing of hip joint endoprostheses
    Autorzy:
    Wieczorek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/212094.pdf
    Data publikacji:
    2007
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
    Tematy:
    badania endoprotez
    stanowisko badawcze
    napęd i sterowanie elektrohydrauliczne
    endoprosthesis testing
    testing stand
    electro-hydraulic drive and control
    Opis:
    W oparciu o wcześniejsze prace dotyczące konstrukcji symulatorów [1,2,3,4] zaprezentowano nowej generacji stanowisko do badań własności użytkowych endoprotez stawu biodrowego człowieka. Przedstawiony symulator umożliwia prowadzenie badań z bezstopniową regulacją obciążenia i dowolnym jego przebiegiem w czasie. W celu przyspieszenia badań zastosowano system trójmodułowy. Każdy moduł składa się z pary kinematycznej modelującej pracę stawu biodrowego. Moduły podłączone są do napędu równolegle. Dzięki temu możliwe jest określenie wartości rozrzutu parametrów zużycia już we wstępnym etapie badań. W pracy podano opis symulatora, schemat napędu elektrohydraulicznego oraz system sterowania.
    On the basis of the previous works concerning the construction of simulators [1,2,3,4], a new-generation stand for the testing of the service properties of human hip joint endoprostheses is presented. The presented simulator enables tests to be carried out with the infinitely variable adjustment of load and its arbitrary variation in time. To accelerate the tests, a three-module system was applied. Each module is composed of a kinematic pair that models the operation of the hip joint. The modules are connected to the drive in parallel. Owing to this, it is possible to determine the values of wear parameter scatter already at the preliminary stage of testing. The paper provides a description of the simulator, a schematic diagram of the electro-hydraulic drive and the control system.
    Źródło:
    Obróbka Plastyczna Metali; 2007, 18, 3; 39-43
    0867-2628
    Pojawia się w:
    Obróbka Plastyczna Metali
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An integrated hydraulic drive system of a novel device for launching lifeboats from large passenger ships
    Autorzy:
    Dymarski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/259052.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship deck equipment
    ship evacuating systems
    life saving appliances systems
    lifeboat chain lift
    hydraulic drive and control system
    Opis:
    This paper presents a continuation of the projects [5, 6] dealing with the novel concepts of evacuating people from large passenger ships. A novel integrated drive and control system for chain lift with lifeboats fastened on it as well as for stern port- ramp, is presented. Additional novel elements is the application of the stern port - ramp fitted with a buoyancy element, and its increased capability of automatic adjusting its operational deflection in the case of a large forward trim of ship. It increases safety and comfort of evacuation in the difficult conditions, but to obtain it a more complex drive and control system has been required to be designed.
    Źródło:
    Polish Maritime Research; 2012, 1; 3-10
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The operating field of a hydrostatic drive system parameters of the energy efficiency investigations of pumps and hydraulic motors
    Autorzy:
    Paszota, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/259125.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    hydrostatic drive and control
    pumps
    hydraulic motors
    Sankey diagram
    energy efficiency
    laboratory and simulation investigations
    Opis:
    The operating field of hydrostatic drive system is presented. Subdivision of the hydraulic motor and pump work parameters into parameters independent of and dependent on the operation of displacement machines and the system is justified. A research project is proposed aimed at development of methods determining the energy characteristics of pumps and rotational hydraulic motors as well as modified methods of determining the energy characteristics of hydrostatic drive systems with selected structures of hydraulic motor speed control. The paper is an extended version of reference [11].
    Źródło:
    Polish Maritime Research; 2009, 4; 16-21
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graphical interpretation of the power of energy losses and power developed in the hydrostatic drive and control system elements
    Autorzy:
    Skorek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/259894.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    hydraulic motor
    energy balance
    energy losses
    energy efficiency
    capacity pump
    hydraulic servomechanism
    hydrostatic drive system
    Źródło:
    Polish Maritime Research; 2012, 4; 44-53
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system. Part II. Rotational hydraulic motor speed parallel throttling control and volumetric control systems
    Autorzy:
    Paszota, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/258538.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    hydrostatic drive and control system
    power of energy losses
    energy efficiency
    Opis:
    Paper presents graphical interpretation of the power of energy losses in the hydrostatic drive and control system elements and also of the power developed by those elements. An individual system fed by a constant capacity pump, where rotational hydraulic motor speed control is effected by a parallel throttling control system, is analyzed and also a system with the rotational hydraulic motor speed volumetric control by a variable capacity pump, an individual system with a rotational hydraulic motor volumetric speed control by means of a simultaneous change of the pump capacity per one revolution and change of the motor capacity per one revolution, the system operating at the constant pressure in the pump discharge conduit equal to the nominal pressure of the system: pP2 = pn and central system (with situated in parallel and simultaneously operating motors) with volumetric speed control of each rotational hydraulic motor by a motor secondary circuit assembly, the system fed by a pump with variable capacity per one shaft revolution fitted with pressure regulator pP2 = pn.
    Źródło:
    Polish Maritime Research; 2008, 4; 21-29
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system. Part I. Rotational hydraulic motor speed series throttling control systems
    Autorzy:
    Paszota, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/259854.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    hydrostatic drive and control system
    power of energy losses
    energy efficiency
    Opis:
    Paper proposes and justifies a diagram of the direction of increase of power stream from the shaft or piston rod of a hydraulic motor to the pump shaft, power increasing as an effect of the imposed power of energy losses in the hydrostatic drive and control system elements. Graphical interpretation of the power of energy losses in the hydrostatic drive and control system elements and also of the power developed by those elements is presented. An individual system with the rotational hydraulic motor speed series throttling control fed by a constant capacity pump cooperating with an overflow valve in a constant pressure system p = cte . pn is analyzed and also an individual system with the rotational hydraulic motor speed series throttling control fed by a constant capacity pump cooperating with an overflow valve controlled in a variable pressure system: p = var, an individual system with the rotational hydraulic motor speed series throttling control fed by a variable capacity pump cooperating with a pressure regulator in a constant pressure system p = cte . pn and an individual system with the rotational hydraulic motor speed series throttling control fed by a variable capacity pump cooperating with the Load Sensing regulator in a variable pressure p = var system.
    Źródło:
    Polish Maritime Research; 2008, 3; 28-37
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    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:
    Evaluation of losses in a hydraulic motor based on the SWSB - 63 motor tests
    Autorzy:
    Maczyszyn, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259391.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    hydrostatic drive and control
    energy efficiency
    power of energy losses
    Opis:
    In this paper are compared two models of energy losses: that suggested by Prof. Paszota, Z. in monograph “Energy losses in the hydraulic displacement motors – definitions and relations serving the evaluation of the efficiency of hydrostatic drive” [18] and that of Prof. Balawender, A. in “Energy analysis and methodology of testing of low-speed hydraulic motors” [1]. By using the data obtained from the tests of SWSB-63 hydraulic motors [2] the graphs which illustrate mechanical, volumetric and pressure losses in function of the parameters on which the losses directly depend [18 ], have been elaborated and showed in comparison with the description of such losses in function of the parameters assumed in [1]. The below presented text has been complemented in relation to that published in the monograph [4] and read during the scientific technical conference „Cylinder 2010” organized by the Mining Engineering Centre „Komag”, Gliwice, and held on 20÷22 September 2010 in Rytro, Poland.
    Źródło:
    Polish Maritime Research; 2010, 4; 46-53
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eksperymentalny pomiar parametrów i charakterystyk hydraulicznego napędu elektrod pieca łukowego
    Experimental measurements of parameters and characteristics of the arc furnace electrodes hydraulic drive
    Autorzy:
    Jagieła, K.
    Gała, M.
    Rak, J.
    Kępiński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/268423.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
    Tematy:
    piec łukowy
    AC
    sterowanie pieca łukowego
    napęd hydrauliczny elektrod
    arc furnace
    arc furnace control
    hydraulic drives
    arc furnace drives
    Opis:
    W artykule przedstawiono wyniki pomiarów parametrów i charakterystyk regulacyjnych hydraulicznego napędu elektrod pieca łukowego AC dużej mocy. Opisano układ sterowania i regulacji położenia elektrod z siłownikami hydraulicznymi. Do bezpośredniego pomiaru położenia elektrod pieca użyto laserowych czujników odległości, podłączonych do komputera pomiarowego. Wyznaczono charakterystyki położenia i prędkości elektrod dla różnych stanów pracy oraz pokazano dynamiczne przebiegi czasowe ruchu elektrod w różnych fazach wytopu. Sformułowano wnioski dotyczące nastaw w układzie sterowania elektrod pieca.
    The article presents the results of measurements of the parameters and characteristics of the hydraulic control of electrodes of high power AC arc furnace. The control and positioning system of the electrodes with hydraulic actuators has been described. Laser distance sensors connected to the measuring computer were used for the direct measurement of the position of AC furnace electrodes. The control signals for the electromagnetic valves were also measured. DasyLab and Matlab software were used for the data acquisition and analysis. The position and speed characteristics of the electrodes for various operating states have been determined. Dynamic characteristics of the electrodes movement in the various melting phases are shown. Conclusions on settings in the furnace electrodes control system were formulated.
    Źródło:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2017, 54; 83-88
    1425-5766
    2353-1290
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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