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Tytuł:
Sprawność hydrostatycznych układów napędowych o złożonej strukturze
Efficiency of hydrostatic drive systems with a complicated structure
Autorzy:
Zastempowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/2071568.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
napęd hydrostatyczny
sprawność układów hydrostatycznych
struktura ukłdów hydrostatycznych
hydrostatic drive
hydraulic system efficiency
hydrostatic system structure
Opis:
W artykule przedstawiono ocenę sprawności dowolnie złożonych układów hydraulicznych, w których cieczą roboczą jest woda. Najkorzystniejszym napędem płynowym dla przemysłu spożywczego jest napęd hydrostatyczny, w którym cieczą roboczą jest woda. Czysta woda jest idealnym medium spełniającym warunki higieniczno-sanitarne. Wodne układy hydrostatyczne mają często złożoną strukturę z uwagi na fakt, że z jednej pompy zasilanych jest wiele odbiorników energii (silników).
A procedure of fast assessment of hydrostatic system efficiency for a complicated system structure with water as drive fluid is presented in the paper. The best drive fluid for food industry is water as working fluid. Clean water is ideal vehicle fulfilling hygienic and health conditions. However, water systems have often a very complicated structure caused by the situation that one pump usually supplies many hydrostatic receivers.
Źródło:
Inżynieria i Aparatura Chemiczna; 2011, 3; 87-88
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The exergetic analysis for predicting of energy efficiency of the hydraulic drive systems
Prognozirovanie ehnergoeffectivnosti sistemy gidroprivoda na osnove ehksergeticheskogo analiza
Autorzy:
Yakhno, O.
Gubarev, A.
Ganpantsurova, O.
Murashhenko, A.
Powiązania:
https://bibliotekanauki.pl/articles/77647.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
hydraulic drive
hydraulic calculation
temperature
viscosity
energy efficiency
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Developing a set of measures to provide maximum hydraulic efficiency of gas gathering pipelines
Autorzy:
Volovetskyi, V. B.
Uhrynovskyi, A. V.
Doroshenko, Ya. V.
Shchyrba, O. M.
Stakhmych, Yu. S.
Powiązania:
https://bibliotekanauki.pl/articles/368779.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
well
gas
gas gathering pipeline
hydraulic efficiency
cleaning the inner cavity of pipelines
studnia
gaz
rurociąg
sprawność hydrauliczna
Opis:
Purpose: The purposes of this article are to study the effective ways of increasing the hydraulic efficiency of gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF); to calculate the operation efficiency of gas gathering pipelines of the Yuliivskyi OGCPF and develop a set of measures to monitor their condition and improve their hydraulic characteristics; to investigate the technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam, to perform the feasibility study on the prospects of its application in practice. Design/methodology/approach: The technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam was investigated to objectively evaluate its application and determine the effectiveness of this measure. The research was carried out within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The results of production studies showed that due to cleaning the flowlines of gas-condensate wells (No.85 and No.60) from the accumulation of liquid, the coefficients of their hydraulic efficiency increased by 12% and 7%, respectively. Measures taken to clean the inner cavity of the flowlines from liquid have proven their efficiency and can be recommended for other flowlines of wells at other production fields. Research limitations/implications: Based on the characteristics of gas gathering pipelines, it is reasonable to conduct experimental studies on the use of the proposed technology of cleaning the inner cavity with foam in the case of increasing its multiplicity. Practical implications: Using the wells of the Yuliivske oil and gas condensate field as case studies, the operating parameters were measured and the pressure losses along the length of the flowlines were calculated. According to the results of calculations at two wells (No.85 and No.60), a significant excess of the actual value of the flow friction characteristic over the theoretical value was established. To reduce excessive pressure losses due to the presence of liquid and improve the hydraulic characteristics of the wells, their inner cavities were cleaned using foam with the expansion ratio from 40 to 100. Originality/value: It is important to note that the advantages of foam piston include: ease of use, no occurrence of hydraulic shocks and preventing stuck during movement in the gas pipeline, application in both straight and inclined sections, no wear of the elements of the cleaning equipment, a rather efficient cleaning of gas pipelines.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2020, 101, 1; 27-41
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental effectiveness studies of the technology for cleaning the inner cavity of gas gathering pipelines
Autorzy:
Volovetskyi, V. B.
Doroshenko, Ya. V.
Tarayevs'kyy, O. S.
Shchyrba, O. M.
Doroshenko, J. I.
Stakhmych, Yu. S.
Powiązania:
https://bibliotekanauki.pl/articles/1818794.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
gas
foam
gas gathering pipeline
hydraulic efficiency
cleaning the inner cavity of pipelines
gaz
piana
rurociąg
sprawność hydrauliczna
Opis:
Purpose: The purposes of the article are to determine the hydraulic efficiency of two gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF) and develop a set of measures to increase it; to experimentally determine the efficiency of using foams to increase the hydraulic characteristics of the gas gathering pipelines in the Yuliivskyi OGCPF; to develop a set of measures that will help to improve the hydraulic characteristics of gas gathering pipelines. Design/methodology/approach: The research methodology consists in determining the hydraulic efficiency of gas gathering pipelines before and after cleaning their inner cavity with foams with different expansion ratios and comparing the obtained values, which allows to objectively assess the efficiency of this cleaning method. The studies were performed within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The pilot testing was carried out to determine the efficiency of cleaning the inner cavity of gas gathering pipelines with foams with different expansion ratios. It showed positive results. It was determined that cleaning the inner cavity of gas gathering pipelines with foams with the expansion ratio from 80 to 90 led to an increase in the hydraulic efficiency coefficient by 10.5%, and with foams with the expansion ratio from 50 to 60 - by 5.7%. The measures taken to clean the inner cavity of gas gathering pipelines from liquid contaminations have proven their efficiency and can be recommended for other fields. Research limitations/implications: The obtained results show that it is reasonable to conduct the experimental studies on the efficiency of cleaning the inner cavity of gas gathering pipelines with the foams with higher expansion ratios. To achieve the maximum quality of cleaning the gas gathering pipelines, it is necessary to develop a new method that will combine the use of foam and gel piston.Practical implications: The performed experimental studies help to take a more reasonable approach to cleaning the inner cavity of gas gathering pipelines with foams and to predict in advance the effect of the foam expansion ratio on the hydraulic efficiency of gas gathering pipelines. Originality/value: The experimental studies on the effect of foam expansion ratios on the hydraulic efficiency of gas gathering pipelines are original.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 105, 2; 61--77
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of gas gathering pipelines operation efficiency and selection of improvement methods
Autorzy:
Volovetskyi, V. B.
Doroshenko, Ya. V.
Kogut, G. M.
Dzhus, A. P.
Rybitskyi, I. V.
Doroshenko, J. I.
Shchyrba, O. M.
Powiązania:
https://bibliotekanauki.pl/articles/2055762.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
gas
gas gathering pipeline
hydraulic efficiency
liquid contamination
foam
inner cavity cleaning
gaz
rurociąg
sprawność hydrauliczna
piana
Opis:
Purpose: The article implies theoretical and experimental studies of the liquid pollution accumulations impact on the efficiency of gathering gas pipelines operation at the Yuliivskyi oil and gas condensate production facility (OGCPF). Research of efficiency of gas pipelines cleaning by various methods. Design/methodology/approach: The research methodology consists of determining the hydraulic efficiency of gathering gas pipelines before and after cleaning of their internal cavity by different methods and comparing the obtained results, which allows to objectively evaluate the efficiency of any cleaning method. CFD simulation of gas-dynamic processes in low sections of gas pipelines with liquid contaminants. Findings: Experimental studies of cleaning efficiency in the inner cavity of the gas gathering pipelines of the Yuliivskyi OGCPF by various methods, including: supply of surfactant solution, creating a high-speed gas flow, use of foam pistons were performed. It was established that cleaning the inner cavity of gas gathering pipelines by supplying a surfactant solution leads to an increase in the coefficient of hydraulic efficiency by 2%-4.5%, creating a high-speed gas flow by 4%-7%, and under certain conditions by 8%-10 % and more. However, for two gas pipelines the use of foam pistons allowed to increase the coefficient of hydraulic efficiency from 5.7 % to 10.5 % with a multiplicity of foam from 50 to 90. be recommended for other deposits.The results of CFD simulation showed that the accumulation of liquid contaminants in the lowered sections of gas pipelines affects gas-dynamic processes and leads to pressure losses above the values provided by the technological regime. With the increase in liquid contaminants volume the pressure losses occur. Moreover, with a small amount of contamination (up to 0.006 m3), liquid contaminants do not have a significant effect on pressure loss. If the contaminants volume in the lowered section of the pipeline is greater than the specified value, the pressure loss increases by parabolic dependence. The increase in mass flow leads to an increase in the value of pressure loss at the site of liquid contamination. Moreover, the greater the mass flow, the greater the impact of its changes on the pressure loss. The CFD simulation performed made it possible not only to determine the patterns of pressure loss in places of liquid contaminants accumulation in the inner cavity of gas pipelines, but also to understand the gas-dynamic processes in such places, which is an unconditional advantage of this method over experimental. Research limitations/implications: The obtained simulation results showed that the increase in the volume of liquid contaminants in the inner cavity of gas gathering pipelines leads to an increase in pressure losses above the value provided by the technological regime. To achieve maximum cleaning of gas gathering pipelines, it is necessary to develop a new method that will combine the considered. Practical implications: The performed experimental results make it possible to take a more thorough approach to cleaning the inner cavity of gas gathering pipelines and to forecast in advance to what extent the hydraulic efficiency of gas gathering pipelines can be increased. Originality/value: The obtained results of CFD simulation of gas-dynamic processes in lowered sections of gas pipelines with liquid contaminants, experimental studies of the effectiveness of various methods of cleaning the inner cavity of gas gathering pipelines has original value.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 107, 2; 59--74
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Modeling of an Experimental Hydraulic Device
Autorzy:
Tkáč, Z.
Halenár, M.
Kosiba, J.
Powiązania:
https://bibliotekanauki.pl/articles/2065018.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
hydraulic fluid
flow rate
flow rate efficiency
Opis:
The design of the experimental laboratory device is based on the construction of the hydraulic circuits of mobile devices. It is possible to ensure the repeatability of the flow characteristic measurements at the laboratory. This means that in the operating test it is possible to verify the flow characteristics of the hydraulic pump and these results are not affected by the change in the physical properties of the applied liquid. By comparing of the flow characteristics directly on the work equipment (mini-excavator, etc.), the disadvantage is the need for dismantling the hydraulic pump and its mounting on the laboratory device. In some working device removal is not possible, where dismantling is structurally difficult or is time consuming, which increases the cost of their operation.The proposed experimental laboratory device serves to verify the flow characteristics of the hydraulic pump and is also designed to be universal, to test external gear hydraulic pump and hydraulic pump with inclined plate.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 63--68
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of energy efficiency improvement by modernisation of hydraulic installations at a fishing cutter at the baltic sea
Autorzy:
Szczepanek, M.
Barta, D.
Michalska-Pożoga, I.
Powiązania:
https://bibliotekanauki.pl/articles/27315958.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
fishing cutter
hydraulic installation
energy efficiency
Opis:
The Energy Efficiency Design Index (EEDI) became mandatory for new ships as well as the Ship Energy Efficiency Management Plan (SEEMP) for all ships due to the MEPC 62 (July 2011) along with the adoption of amendments to MARPOL Annex VI by the Parties to the MARPOL Annex VI. This was the first legally binding climate change treaty to be adopted since the Kyoto Protocol. The Ship Energy Efficiency Management Plan (SEEMP), which has been obligatory since 2013, did not to cover fishing cutters but triggered the implementation of energy efficiency audits due to fishing limits, high fuel prices, and free freight market. All the above caused that ship-owners started seeking ways for saving money and keep their business profitable. Apart from energy recovery installations, fishing vessels have been furnished with the latest technologies aimed at the reduction of energy consumption and at making ships greener. A research team of the Maritime University of Szczecin conducted energy efficiency audits on several fishing vessels operated on the Baltic Sea and stated that up to 40% of the energy is used during fishing operations by hydraulic devices installed at the fishing vessels. The paper presents the measurement results of energy consumption in typical operational states based on a selected fishing cutter operating at the Baltic Sea. The paper includes also the recommendations in terms modernization of hydraulic installations and the changes of control methods for devices with hydraulic drive. The calculations are also presented herein and they prove that it is possible to reduce energy consumption by a fishing cutter even by 20% while maintaining the unchanged operating parameters of the hydraulic devices.
Źródło:
New Trends in Production Engineering; 2018, 1, 1; 561-566
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja trasy przejazdu samochodu z hydraulicznym dźwigiem samochodowym podczas załadunku drewna
Optimization of the route of a truck with a hydraulic crane during loading of wood
Autorzy:
Szada-Borzyszkowski, W.
Szada-Borzyszkowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/316347.pdf
Data publikacji:
2018
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
efektywność transportu
transport drewna
dźwig hydrauliczny
transport efficiency
timber transport
hydraulic crane
Opis:
W artykule przedstawiono projekt usprawnienia przebiegu tras przejazdu samochodów z hydraulicznym dźwigiem samochodowym. Omówiono proces załadunku i transportu drewna. Zaprezentowano trasy przejazdu samochodów z hydraulicznym dźwigiem samochodowym realizujących załadunek w różnych obszarach firmy.
The article presents a plan to improve the course of routes of a truck with hydraulic crane. The process of loading and transporting wood is covered. The routes of truck with a hydraulic crane that perform loading in various areas of the company are presented.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2018, 19, 9; 97-100
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CFD methods as a modern tool in optimisation of hydrodynamic conditions in magma crystallizers
Autorzy:
Synowiec, P.
Wójcik, J.
Bigda, J.
Powiązania:
https://bibliotekanauki.pl/articles/1955724.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
CFD
crystallization
hydraulic efficiency
Opis:
Selected parameters concerning the optimisation of hydrodynamics in magma crystallizers are discussed. At this stage, results of CFD (Computational Fluid Dynamics) simulations are shown, focused on the effect of the geometrical configuration of a crystallizer on energy dissipation rate, axial velocity field and general hydraulic efficiency. The influence of the shape of the apparatus' bottom, diameter of the stirrer, its location and presence of the draft tube on, respectively: (i) unit power input distribution, (ii) the average mixing power, and (iii) pumping capacity have been takeninto consideration. The results obtained from simulations have been compared with experiments and literature data.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 3; 459-466
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrated model of hydraulic fracturing and hydro-carbon production
Autorzy:
Stopa, J.
Wojnarowski, P.
Janiga, D.
Powiązania:
https://bibliotekanauki.pl/articles/298591.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
hydraulic fracturing
reservoir simulation
efficiency estimation
Opis:
The dynamics of discovering conventional hydrocarbon reservoirs has significantly dropped down in the World over the last ten years. Resources deposited in reservoirs having poor properties, where the production with economically justified yield is possible after prior enhancement (hydraulic fracturing in particular), become more important. Accordingly, proper designing of development works and hydraulic fracturing are decisive. Author's methodic and software for integrated modeling of hydraulic fracturing and production with the use of a3D fracture model are presented in this paper. This can be used for evaluating the efficiency of the fracturing treatment and its optimization. The results of hydraulic fracturing modeling were implemented in the reservoir simulator with the software written in C++. The designed fracture can be introduced into a numerical grid of a reservoir simulator. This tool can be a choice for a quick variant simulation for the best scenario of reservoir development selection. The practical implementation of this program was presented on the example of a ,tight gas' reservoir.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 1; 49-57
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wpływu nieosiowego położenia par obrotowych siłownika na sprawność mechaniczną
Analysis of the effect of hydraulic cylinder rotational couplings unalignment on its mechanical efficiency
Autorzy:
Stępniewski, A.A.
Powiązania:
https://bibliotekanauki.pl/articles/287012.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
siłownik
tarcie
sprawność mechaniczna
samohamowność
hydraulic cylinder
rotational pairs
friction
mechanical efficiency
self-locking
Opis:
Przeanalizowano wpływ błędu położenia osi par obrotowych mocowania siłownika na sprawność mechaniczną. Założono, że siły reakcji działają pomiędzy pierścieniami tłoka i cylindrem lub siły reakcji działają pomiędzy pierścieniem tłoka i cylindrem i pomiędzy tłoczyskiem i uszczelnieniem. Zamodelowano cztery warianty błędnego położenia środków par obrotowych, gdy błąd położenia dotyczy jednej z par (cylindra lub tłoczyska) i obu par jednocześnie a osie par obrotowych znajdują się po tej samej lub przeciwnych stronach osi siłownika. Siły tarcia obliczono iteracyjnie z warunków równowagi statycznej. Wyznaczono przebiegi sprawności oraz wymiary odległości osi par obrotowych od osi siłownika, dla których połączenie jest samohamowne.
The effect of axial alignment of hydraulic cylinder rotational pairs on its mechanical efficiency was analyzed. It was assumed that the reaction forces appear between piston rings and cylinder as well as between piston rod and the sealing. Four variants of unalignment were modeled: only one rotational pair is unaligned to cylinder axis (two cases) and both rotational pairs are shifted from cylinder axis (including two options – the shift to opposite direction or to the same direction). The friction forces were iteratively computed for the static balance conditions. Computed mechanical efficiency was plotted as a function of unalignment (normalized) for the interval from zero to value of device self-locking (when the efficiency is equal zero).
Źródło:
Inżynieria Rolnicza; 2005, R. 9, nr 8, 8; 367-375
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the influence of hydraulic oil temperature on the variable-speed pump performance
Autorzy:
Stawiński, Łukasz
Kosucki, Andrzej
Cebulak, Maciej
Górniak vel Górski, Adrian
Grala, Mikołaj
Powiązania:
https://bibliotekanauki.pl/articles/2087011.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
hydraulic pump
volumetric efficiency
temperature-dependent characteristics
variable speed drive
hydraulic oil
Opis:
This paper describes investigation on the influence of hydraulic oil temperature on the performance of a hydraulic pump. The aim of the research is to determine changes in volumetric efficiency of the pump in the form of maps of operation at different temperatures of the hydraulic oil, in conditions of variable speed and pressure. The described tests were carried out on an experimental stand with a hydraulic fixed-displacement gear pump controlled by a servo motor. Based on the signals from the sensors processed with the LabVIEW program, maps of the hydraulic pump operation were drown in a wide range of speeds and temperatures. The paper presents the results of the research and based on this the conclusions regarding the main aim of the research and others that were observed during the measurements were presented. The most important conclusion from the study shows that the temperature-dependent characteristics provide users with a significant amount of information such as operating conditions that will ensure a high level of efficiency.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 2; 289--296
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of pressure drop on the working volume of a hydraulic motor
Autorzy:
Śliwiński, Pawel
Powiązania:
https://bibliotekanauki.pl/articles/2200940.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
theoretical working volume
actual working volume
hydraulic motor
satellite
motor
volumetric efficiency
mechanical efficiency
Opis:
Reliability and maintenance analysis of hydraulic positive machines basicly focused on the processes of their wear and failure. But in order to correctly assess the mechanical and volumetric efficiency of a hydraulic motor, both at the stage of development research or at the stage of control tests during its exploitation, the working volume of this motor must be correctly determined. Therefore this paper proposes a new method of assessment of the size of the working volume of a hydraulic motor. It has been shown that the hydraulic motor absorbency per one revolution of this motor shaft is a non-linear function of pressure drop in working mechanism of the motor and non-linear function of motor rotational speed. Thus the relation between the working volume of a hydraulic motor and the pressure drop in the motor working mechanism is a non-linear function. This working volume as a funcition of pressure drop has been called the actual working volume. The correctness of the proposed method was confirmed experimentally.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 4; 747--757
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the structural and total energy efficiency of selected hydraulic systems with proportional control linear motor
Autorzy:
Skorek, G.
Powiązania:
https://bibliotekanauki.pl/articles/247433.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy efficiency
power of losses
hydrostatic system
throttling steering
pump
hydraulic linear motor
proportional directional valve
Opis:
In the paper are presented the diagrams of the structural energy efficiency of system with the throttling control assembly and total energy efficiency of the system with constant or variable capacity pump cooperating an overflow valve with the throttling control of the linear hydraulic motor. Diagrams of total energy efficiency of three hydraulic systems working at the same parameters of speed and load of hydraulic linear motor, which were different due to structure and ability of energy saving were presented and compared. This publication also presents analyses and compares the areas of the power fields of energy losses occurring in the elements of three compared hydraulic systems with different structures of the hydraulic linear motor speed control on example on Load Sensing system. The graphical interpretation of the power of losses in the hydrostatic drive and control system elements lets to compare the same power fields of energy losses with other power fields of another structure. This enables to understand what energy losses are the biggest and in which elements of compared hydraulic systems. The best possibility to use in system, as a supply source of the hydraulic cylinder speed series throttling control assembly, is a set consisting of a variable capacity pump cooperating with a Load Sensing (LS) regulator, which totally eliminates the structural volumetric losses in a system. Power ΔPstv of structural volumetric losses is equal to zero, because the current pump capacity QP is adjusted, by the LS regulator, to the current flow intensity QM set by the throttling assembly.
Źródło:
Journal of KONES; 2016, 23, 2; 317-324
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy saving systems of hydrostatic drives for ship deck machines
Autorzy:
Skorek, G.
Powiązania:
https://bibliotekanauki.pl/articles/27315951.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
efektywność energetyczna
siła strat
układ hydrostatyczny
sterowanie dławieniem
hydrauliczny silnik liniowy
energy efficiency
power of losses
hydrostatic system
throttling steering
hydraulic linear motor
Opis:
A control system with a proportional directional throttling control valve or a directional control servo valve, controlling a cylinder (linear hydraulic motor) is used in the ship steering gear drive, in the controllable pitch propeller control, in the variable capacity pump control system for hydraulic deck equipment motors or fixed pitch propellers in small ships (for example ferries). Energy savings in a constant capacity pump operation can be achieved by means of overflow valve controlled by the oil outlet pressure between the directional throttling control valve and the cylinder. Although structural volumetric losses cannot be eliminated in such a system, but it is possible to reduce considerably structural pressure losses, mechanical losses and volumetric losses in the pump, and mechanical losses in the cylinder too. The paper discusses these energy savings using an earlier developed by Paszota mathematical model of losses in elements, the energy efficiency of the system and the operating range of the cylinder. The paper also presents a comparison of the energy behavior of two widespread structures of hydrostatic systems: a standard individual systems with a throttling steering fed by a constant capacity pump. Both system solutions are described and equations of the total efficiency η of the system are presented. Diagrams of energy efficiency of two hydraulic systems working at the same parameters of a speed and a load of hydraulic linear motor, which were different due to structure and ability of energy saving, were presented and compared.
Źródło:
New Trends in Production Engineering; 2018, 1, 1; 507-514
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 36

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