Relevant bibliographies by topics / Hydraulic pump

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Hydraulic pump'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 January 2023

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Journal articles on the topic "Hydraulic pump"

1

Zagar, Philipp, Helmut Kogler, Rudolf Scheidl, and Bernd Winkler. "Hydraulic Switching Control Supplementing Speed Variable Hydraulic Drives." Actuators 9, no. 4 (December 4, 2020): 129. http://dx.doi.org/10.3390/act9040129.

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Primary control of linear motion by variable speed electric motors driving a hydraulic cylinder via a constant displacement pump is an established and successful concept with a frequent use in industry. One problem arises when low or zero motion speed has to be realized under high pump pressure conditions. Such load scenarios occur frequently in certain pressing processes, e.g., for sintering or veneering. Most pumps have a lower speed limit, below which critical tribological conditions occur which impair lifespan and efficiency. In addition, pump speed control and pump fluctuation suffer from the mixed lubrication conditions in such an operation range. For a circumvention of such low speed pump operation, a digital valve control concept is presented and studied in this paper. Valve control is used in load holding phases with low speed. Pressure is provided by an accumulator which is charged by the pump in short charging cycles at reasonable pump speeds. It is shown that the mean control error during load holding phase lies within the desired band and the fluctuations of the control force are lower than those of the pump control. In addition, the unfavorable pump operation conditions can be avoided via digital control.
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Wang, Hua Bing, and Jun Ke Hu. "Durability Testing System with Power Recycle for the Variable Displacement Closed-Loop Hydraulic Pumps." Applied Mechanics and Materials 241-244 (December 2012): 1333–37. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.1333.

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A testing system scheme with power recycle for hydraulic pumps’ durability is present, which is based on a hydraulic motor with hydraulicly overridden pressure compensation. The hydraulic motor can adaptively adjust its displacement to meet the demand of displacement match of the power feedback in the system. The system pressure can be set by adjusting the starting control pressure of the motor. The rotating speed of the pump is guaranteed by the control of the driven electrical motor. A hydraulic bridge unit is used to guide the flow from the outport of the pump to the fixed inlet port of the hydraulic motor and thus causes the motor to rotate in a certain direction to drive the pump in order to recycle the power.
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Azzam, Israa, Keith Pate, Jose Garcia-Bravo, and Farid Breidi. "Energy Savings in Hydraulic Hybrid Transmissions through Digital Hydraulics Technology." Energies 15, no. 4 (February 13, 2022): 1348. http://dx.doi.org/10.3390/en15041348.

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Hydraulic hybrid drivetrains, which are fluid power technologies implemented in automobiles, present a popular alternative to conventional drivetrain architectures due to their high energy savings, flexibility in power transmission, and ease of operation. Hydraulic hybrid drivetrains offer multiple environmental benefits compared to other power transmission technologies. They provide heavy-duty vehicles, e.g., commercial transportation, construction equipment, wagon handling, drilling machines, and military trucks, with the potential to achieve better fuel economy and lower carbon emissions. Despite the preponderance of hydraulic hybrid transmissions, state-of-the-art hydraulic hybrid drivetrains have relatively low efficiencies, around 64% to 81%. This low efficiency is due to the utilization of conventional variable displacement pumps and motors that experience high power losses throughout the drive cycle and thus fail to maintain high operating efficiency at lower volumetric displacements. This work proposes and validates a new methodology to improve the overall efficiency of hydraulic hybrid drivetrains by replacing conventional pump/motor units with their digital counterparts. Compared to conventional pump/motors, the digital pump/motor can achieve higher overall efficiencies at a wide range of operating conditions. A proof-of-concept digital pump/motor prototype was built and tested. The experimental data were integrated into a multi-domain physics-based simulation model of a series hydraulic hybrid transmission. The proposed methodology permits enhancing the overall efficiency of a series hydraulic hybrid transmission and thus allows for energy savings. Simulating the system at moderate load-speed conditions allowed achieving a total efficiency of around 89%. Compared to the average efficiency of the series hydraulic hybrid drivetrains, our simulation results reveal that the utilization of the state-of-the-art digital pump enables improving the total efficiency of the series hydraulic hybrid drivetrain by up to 25%.
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Zhang, Tianxiao, and Nong Zhang. "Vibration Modes and the Dynamic Behaviour of a Hydraulic Plunger Pump." Shock and Vibration 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/9679542.

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Mechanical vibrations and flow fluctuation give rise to complex interactive vibration mechanisms in hydraulic pumps. The working conditions for a hydraulic pump are therefore required to be improved in the design stage or as early as possible. Considering the structural features, parameters, and operating environment of a hydraulic plunger pump, the vibration modes for two-degree-of-freedom system were established by using vibration theory and hydraulic technology. Afterwards, the analytical form of the natural frequency and the numerical solution of the steady-state response were deduced for a hydraulic plunger pump. Then, a method for the vibration analysis of a hydraulic pump was proposed. Finally, the dynamic responses of a hydraulic plunger pump are obtained through numerical simulation.
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Ułanowicz, Leszek, Grzegorz Jastrzębski, Michał Jóźko, Ryszard Sabak, and Paweł Szczepaniak. "Hydraulic plunger pump contamination sensitivity evaluation." Journal of KONBiN 48, no. 1 (December 1, 2018): 371–83. http://dx.doi.org/10.2478/jok-2018-0061.

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Abstract The correct operation of the hydraulic pump and achieving the assumed durability depends on the purity of the used working fluid. The research paper discusses a method for evaluating the contamination sensitivity of a hydraulic plunger pump. The theoretical grounds for evaluating the contamination sensitivity of hydraulic plunger pumps of a hydraulic drive based on the contamination sensitivity factor were presented. An example of evaluating contamination sensitivity of an NP-34M hydraulic plunger pump was discussed.
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Chumakov, Pavel V., Alexei V. Martynov, Alexander V. Kolomeychenko, Ismail H. Hasan, and Alla S. Kolomeychenko. "Evaluation of Technical Condition of Round Gear Hydraulic Pumps of Tractor Mounted Hydraulic Systems." Engineering Technologies and Systems 30, no. 3 (September 30, 2020): 426–47. http://dx.doi.org/10.15507/2658-4123.030.202003.426-447.

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Introduction. In the technical service enterprises, the reliable estimation of a technical condition of hydraulic gear pumps of tractor mounted hydraulic systems is a priority in introducing new repair processes. The absence of data of manufacturing plants on limiting wear of working surfaces of hydraulic pump details, when the decision on repair is taken, leads to the necessity of carrying out additional researches. In this regard, the purpose of work is to find the limit wear values for working surfaces of details of round gear hydraulic pumps. Materials and Methods. The laboratory tests of used round gear hydraulic pumps were carried out according to the method developed in the GOSNITI on the hydraulic bench of the KI-28097M-GOSNITI. The controlled parameter during tests is the pump delivery rate. Results. The results of laboratory bench and micrometer studies of used round gear hydraulic pumps are presented in the work. The mathematical model of pump delivery rate dependence on statistically significant independent factors is obtained. The limit values for wear of working surfaces of round gear hydraulic pump details are determined by the steepest ascent method on the received mathematical model. Discussion and Conclusion. According to the results of the input bench control of the used round gear pumps, 81% of the tested units were operated in the over-extreme limit state. The limit values for wear of working surfaces of round gear hydraulic pump details obtained by the steepest ascent method make it possible to make a conclusion about the necessity of their restoration in repairing at technical service enterprises.
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Akanova, G., A. Sadkowski, S. Podbolotov, A. Kolga, and I. Stolpovskikh. "Ways to reduce hydraulic losses in multistage centrifugal pumping equipment for mining and oil-producing industries." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (2021): 77–84. http://dx.doi.org/10.33271/nvngu/2021-6/077.

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Purpose. To study hydraulic losses in pumping units during pumping and transportation of liquids, to develop the design and technology solutions to improve the energy efficiency of centrifugal pumps in the mining and oil-producing industries. Methodology. In the theoretical and experimental analysis of hydraulic losses during the transportation of liquids, the hydraulics and experimental analysis methods were used. Findings. As a result of the research carried out, a new design scheme of a multistage centrifugal pump has been developed, providing a coaxial arrangement of impellers, which allows reducing hydraulic losses in pump elements and increasing the energy efficiency of pumping units. Originality. Based on the analysis of existing designs of multistage blowers of axial and centrifugal types, the distribution of hydraulic losses in the elements of a centrifugal blower with coaxial impellers is considered. Experimental dependences on the establishment of pressure flow and power characteristics are presented. Based on the accounting of hydraulic losses, the energy efficiency of the design of the pumping unit with the coaxial arrangement of the impellers was assessed. Practical value. The new design of a centrifugal pump with coaxial impellers reduces hydraulic losses by more than 23% compared to traditional designs of centrifugal pumps. The results of the work can be used by design, research, and industrial organizations engaged in the design and operation of pumping equipment.
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Breidi, Farid, Jordan Garrity, and John Lumkes. "Design and Testing of Novel Hydraulic Pump/Motors to Improve the Efficiency of Agricultural Equipment." Transactions of the ASABE 60, no. 6 (2017): 1809–17. http://dx.doi.org/10.13031/trans.11557.

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Abstract. Hydraulic systems are prevalent in agricultural machinery and equipment and can be found transmitting power for vehicle drive wheels, powering attachments, and controlling motion (booms, steering, load height, etc.). Agricultural applications of fluid power have advanced in terms of capability and efficiency, but opportunities remain for significant improvements in efficiency, noise reduction, and reliability. The average system-level hydraulic efficiency of current mobile agricultural machines is only 21.1%. Because nearly all hydraulic systems use pumps to convert engine power to fluid power, improving the efficiency of the pumps (and motors when used as actuators) significantly impacts the system efficiency. This work examines the impact of using more efficient digital pump/motors to improve the overall efficiency of agricultural equipment, such as tractors, harvesters, planters, fertilizers, sprayers, and attachments. Maintaining higher pump/motor efficiency throughout the operating range is the central principal for the energy savings. Currently used variable-displacement pumps have low efficiencies at low displacement levels due to constant losses that do not scale with the power produced. Digital pump/motors minimize these inefficiencies because energy losses scale more closely with the power produced. Experimental results indicate an average efficiency of 85% when operating at 20% to 100% displacement. This efficiency is 15% to 20% higher on average than with current variable-displacement axial piston pumps. This study demonstrates that achieving this improvement in the efficiency of the pump/motors used in tractors and harvesters alone would conservatively save $61.7 million worth of energy annually for end users in the U.S. agricultural sector. Keywords: Agricultural equipment, Digital hydraulics, Efficiency improvement, Hydraulic pump/motor.
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Jing, Bao De, Bin Bin Lv, Zeng Jun Pan, Long Yi, Zhu Ge Gang, and Jian Yu Jiang. "A Research Based on the Deep Self-Balanced Hydraulic Pump." Advanced Materials Research 305 (July 2011): 411–15. http://dx.doi.org/10.4028/www.scientific.net/amr.305.411.

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The article will give information about the status of sea water pump technology research, carry out the analysis of the water pump slipper, piston and water pump housing and other key parts of hydraulic pumps, and finally make some optimization and innovation. In addition, there will be a mathematical model simulation for four major friction of the hydraulic pump sea water through the MatLab . The simulation results of the design of water hydraulic pump has a certain significance.
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Pietrzyk, Tobias, Markus Georgi, Sabine Schlittmeier, and Katharina Schmitz. "Psychoacoustic Evaluation of Hydraulic Pumps." Sustainability 13, no. 13 (June 30, 2021): 7320. http://dx.doi.org/10.3390/su13137320.

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In this study, sound measurements of an axial piston pump and an internal gear pump were performed and subjective pleasantness judgements were collected in listening tests (to analyze the subjective pleasantness), which could be seen as the inverse of the subjective annoyance of hydraulic drives. Pumps are the dominant sound source in hydraulic systems. The noise generation of displacement machines is subject of current research. However, in this research only the sound pressure level (SPL) was considered. Psychoacoustic metrics give new possibilities to analyze the sound of hydraulic drive technology and to improve the sound quality. For this purpose, instrumental measurements of the acoustic and psychoacoustic parameters are evaluated for both pump types. The recorded sounds are played back to the participants in listening tests. Participants evaluate them regarding the subjective pleasantness by means of paired comparison, which is an indirect scaling method. The dependence of the subjective pleasantness on speed and pressure was analyzed for both pump types. Different regression analyses were carried out to predict the subjectively perceived pleasantness or annoyance of the pumps. Results show that a lower speed is the decisive operating parameter for reducing both the SPL and the annoyance of a hydraulic pump.
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Dissertations / Theses on the topic "Hydraulic pump"

1

Rampen, William Hugh Salvin. "The digital displacement hydraulic piston pump." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/12829.

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The digital displacement hydraulic piston pump is a hybrid device which combines a microcompressor with an established form of high-pressure pump to create a highly integrated machine which can produce a variable high-power output directly from an electronic command. The actively controlled inlet poppet-valve in each cylinder can be held open against the discharging flow in order to disable it during a single cycle. Cylinders can be disabled in this manner, following a maximally smooth sequence, allowing a controlled output flow to be achieved. A compliant device located near the pump, such as an accumulator, provides time-averaging of the flow pulsations in order to minimise the effects of the quantisation error caused by cylinder disabling. The advantages of this approach over the conventional variable-swash axial piston pump lie with both the response speed and the inherent energy efficiency of real-time cylinder selection. Disabling cylinders in this way restricts parasitic losses to very low levels since unused cylinders are not pressurised nor do they incur loads on their associated bearings. The response time of the pump is related to shaft speed, with the pump able to attain either full or zero output from any starting condition, in less than a single shaft revolution. At induction motor speeds this allows large-signal response times of the same order as those achieved by commercial proportional valves. The thesis chronicles the development of the Digital Displacement pump. It begins with the formulation of a simulation model which is able to predict the behaviour of the machine in both flow and pressure control modes. The valve control possibilities are then explored and the design of active valve latches using finite-element analysis described. The sinusoidal flow forces on the disabled poppet are evaluated through a large range of experiments and the results condensed into parametric equations useful for predicting the valve latching requirements of most machines. The mechanical and electronic hardware design, leading to the construction of the prototype, is then discussed.
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Kulikov, O., and J. Kozachenko. "Reduction of hydraulic losses in a piston pump." Thesis, Sumy State University, 2020. https://essuir.sumdu.edu.ua/handle/123456789/77834.

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The hydraulic losses are the decrease in energy of the fluid due to vortex formation, friction between the fluid and the pipe, changing the flow of fluid. The decrease in energy of the fluid, in turn, leads to the following consequences: decrease efficiency, increase energy consumption and decrease cavitation stock pump. The main danger in a piston pump is to reduce cavitation stock. This leads to boiling of water by pressure reduction and rapid destruction the flow part of the pump.
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Lee, Seong-Ryeol, Florian Schoemacker, Christian Stammen, and Katharina Schmitz. "Numerical and experimental study on novel hydraulic pump concept." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71110.

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This paper discusses an investigation on a novel hydraulic pump concept. The idea aims on a pump principle to be directly connected to high-speed electric motors to build compact high-pressure drives. The pump can theoretically work without solid contact and has no kinematic pulsation. The composition of the pump is basically similar to cylindrical journal bearings. In general, a journal bearing is used to support external loads on a rotating shaft. When the shaft rotates with the loads, hydrodynamic fluid force is generated in the fluid film, which compensates the external force and reduces an eccentricity of the shaft. The difference of the introduced pump concept from the bearing is that the eccentricity is fixed and it has an outlet port at the high pressure area, through which the fluid can be transferred. To examine the functionality of the pump, a test bench is constructed and experiments are performed to investigate the pressure build-up and discharging flow of the pump concept. The experimental results are numerically analyzed by using elasto-hydrodynamic lubrication (EHL) simulation, based on the 2D Reynold’s equation. From these results, the functionality of the pump concept is confirmed. Moreover, several variables that influence the characteristic curve of the pump are studied. Based on these results, geometric parameters of the test pump are redesigned to discharge sufficient flow rate for usage as commercial pumps.
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Dean, Patrick T. "Modern control design for a variable displacement hydraulic pump." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4647.

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Thesis (M.S.)--University of Missouri-Columbia, 2006.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 21, 2009) Includes bibliographical references.
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Davoodi, Mehdi. "High performance repair materials in hydraulic structures and machines." Thesis, University of Newcastle Upon Tyne, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285358.

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Kasaragadda, Suresh Babu. "The theoretical flow ripple of an external gear pump /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p1418037.

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Effrece, Frank. "The dynamic controls of a hydraulic press by controlling the pump motor." Ohio : Ohio University, 1987. http://www.ohiolink.edu/etd/view.cgi?ohiou1183044178.

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Xu, Xin Ping. "Experimental modeling of a hydraulic load sensing pump using neural networks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23892.pdf.

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Kleynhans, S. H. "Physcial hydraulic model investigation of critical submergence for raised pump intakes." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20304.

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Thesis (MScEng)--Stellenbosch University, 2012.
ENGLISH ABSTRACT: Various design guidelines have been published over the past four decades to calculate the minimum submergence required at pump intakes to prevent vortex formation. These design guidelines also require the suction bell to be located not higher than 0.5 times the suction bell diameter (D) above the floor. Sand trap canals are an integral part of large river abstraction works, with the pump intakes located at the end of the sand trap canals. The canals need to be flushed by opening a gate, typically 1.5 m high, that is located downstream of the pump intake. This requires the suction bell be raised to not interfere with the flushing operation, which leads to the question – what impact does the raising of the suction bell have on the minimum required submergence? A physical hydraulic model constructed at 1:10 scale was used to determine the submergence required to prevent types 2, 5 and 6 vortices for prototype suction bell inlet velocities ranging from 0.9 m/s to 2.4 m/s, and for suction bells located at 0.5D, 1.0D and 1.5D above the floor. The tests were undertaken for four suction bell configurations with a conventional flat bottom suction bell, fitted with a long radius bend, being the preferred suction bell configuration in terms of the lowest required submergence levels. The experimental test results of the preferred suction bell configuration were compared against the published design guidelines to determine which published formula best represents the experimental test results for raised pump intakes. It became evident from the experimental test results that the required submergence increased markedly when the suction bell was raised higher than a certain level above the floor. It was concluded that this “discontinuity” in the required submergence occurred for all the suction bell configuration types when the ratio between the prototype bell inlet velocity and the approach canal velocity was approximately 6.0 or higher. It is recommended that, for pump intakes with a similar geometry to that tested with the physical hydraulic model, critical submergence is calculated using the equation published by Knauss (1987), i.e. S = D(0.5 + 2.0Fr), if the prototype bell inlet velocity/approach canal velocity ratio is less than 6.0, and that the equation published by the Hydraulic Institute (1998), i.e. S = D(1 + 2.3Fr), can be used where the ratio, as determined with Knauss’ (1987) equation, exceeds 6.0. It is also recommended that prototype bell inlet velocities be limited to 1.5 m/s.
AFRIKAANSE OPSOMMING: Oor die afgelope vier dekades is verskeie ontwerpriglyne vir die berekening van minimum watervlakke, om werwelvorming by pompinlate te voorkom, gepubliseer. Hierdie ontwerpriglyne vereis dat die klokmond van die pompinlaat nie hoër as 0.5 keer die deursnee van die klokmond (D) bokant die kanaalvloer geleë moet wees nie. Sandvang kanale vorm ‘n integrale deel van groot riveronttrekkingswerke, met pompinlate wat aan die einde van hierdie kanale geleë is. Die kanale word aan die stroomaf kant van die pompinlaat voorsien met sluise sodat die kanale gespoel kan word. Hierdie sluise is tipies 1.5 m hoog. Dit is derhalwe nodig om die hoogte onder die klokmond dieselfde te maak as die hoogte van die sluis sodat die klokmond die spoelwerking nie beïnvloed nie. Die vraag is egter – wat is die impak op die minimum vereiste watervlakke indien die klokmond op ‘n hoër vlak installeer word? ‘n Fisiese hidrouliese model met ‘n 1:10 skaal is gebruik om die minimum watervlakke te bepaal waar tipes 2, 5 en 6 werwels aangetref word vir prototipe inlaatsnelhede van 0.9 m/s tot 2.4 m/s en klokmond hoogtes van 0.5D, 1.0D en 1.5D bokant die kanaalvloer. Vier klokmond konfigurasies is getoets. Die minimum vereiste watervlakke was die laagste vir die tradisionele plat klokmond met ‘n lang radius buigstuk en was dus die voorkeur klokmond. Die eksperimenttoetsresultate vir die voorkeur klokmond is met die gepubliseerde ontwerpriglyne vergelyk om te bepaal watter van die ontwerpsriglyne van toepassing sal wees vir verhoogde klokmond installasies. Uit die eksperimenttoetsresultate is dit duidelik dat die vereiste watervlakke skielik verhoog sodra die klokmond installasie ‘n seker hoogte bokant die kanaal vloer oorskry. Daar is bevind dat hierdie verskynsel by al vier klokmond konfigurasies voorkom sodra die verhouding tussen die prototipe klokmond inlaatsnelheid teenoor die snelheid in die kanaal hoër as 6.0 is. Daar word aanbeveel dat die minimum vereiste watervlak vir pompinlate met dieselfde geometrie as die fisiese model, met Knauss (1987) se vergelyking bereken word, naamlik S = D(0.5 + 2.0Fr), waar die snelheidsverhouding tussen die klokmond en kanaal 6.0 nie oorskry nie, en dat die vergelyking gepubliseer deur die Hydraulic Institute (1998), S = D(1 + 2.3Fr), gebruik word waar die snelheidsverhouding 6.0, so bereken met Knauss (1987) ser vergelyking, wel oorskry. Die prototipe klokmond inlaatsnelheid moet ook beperk word tot 1.5 m/s.
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Law, Thomas Robert. "A double-acting hydraulic ram pump for deep-well water pumping." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:2118b139-caac-4eea-ab0d-56e625916971.

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Many existing deep-well water pumping technologies that are affordable to developing world smallholders suffer from reliability issues, low efficiency and/or expensive running costs. The Double-Acting Hydraulic Ram Pump (DAHR) has the potential to address these problems. An evolution of the classic hydraulic ram pump that converts kinetic energy from free-flowing water sources into a reduced flow at a much higher head, the DAHR contains virtually no moving parts or dynamic seals. The result is a deep-lift technology that can be both highly efficient and extremely reliable. This thesis investigates the potential of the DAHR, taking an initial proof-of-concept rig to a design that is ready for outdoor field trials. The beta prototype design process has been aided considerably by the development of a suite of numerical models. Like the conventional hydraulic ram, the DAHR has clearly defined acceleration and delivery phases either side of an impact event. The fluid motion during acceleration is modelled using a 1D lumped element approach whereas the delivery phase modelling is based on the shock equations for both compression and rarefaction waves. Unlike the conventional hydraulic ram, the DAHR makes full use of the kinetic energy downstream of the impact. The numerical results facilitate the selection of drive pipe diameter, inlet/delivery valves and the choice of pipe material via the resulting sound speed. A 15 m tall test facility housed within a three storey public stairwell was set up to help simulate pumping from deep underground. The DAHR sitting in a tank at the bottom would lift water to the top of the stairwell before it was returned under gravity to complete the circuit. The driving power input to create the low pressure, high volume oscillatory flow within the DAHR U-tube is provided by two custom-made pneumatic fluidynes. The data acquired over several weeks of testing with three different plastic drive pipe materials required an automated post-processing routine capable of analysing DAHR performance impact-by-impact. Computed efficiencies of up to 75 percent were achieved while pumping 350 L/h at 32 m head. Experimental observations also showed good agreement with numerical modelling. A single-acting design, capable of fitting down a smaller borehole, was considered as an alternative way forward. A further prototype, with the second drive pipe replaced by a gas spring, was designed, built and tested in the same facility. The prototype proved substantially more difficult to control and estimated efficiency was approximately half that of the DAHR validating the original double-acting approach.
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Books on the topic "Hydraulic pump"

1

Totten, GE, GH Kling, and DJ Smolenski, eds. Tribology of Hydraulic Pump Testing. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1997. http://dx.doi.org/10.1520/stp1310-eb.

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Glover, Peter B. M. Computer simulation of the hydraulic ram pump. [s.l.]: typescript, 1989.

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D, Jeffery T., ed. Hydraulic ram pumps: A guide to ram pump water supply systems. London: Intermediate Technology Publications, 1992.

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Mincey, Steve Berl. Basic water systems: A pump and hydraulic training manual. Westerville, Ohio: National Ground Water Association, 2002.

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Rohner, Peter. hand pump Industrial hydraulic control: A textbook for fluid power technicians. 2nd ed. Englewood Cliffs, N.J: Prentice-Hall, 1987.

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Tondl, Aleš. Analysis of the transient processes in models of pump-turbines after sudden unloading. Praha: SNTL, 1986.

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Glover, Peter B. M. Computer simulation and analysis methods in the development of the hydraulic ram pump. [s.l.]: typescript, 1994.

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Husain, Zoeb. Basic fluid mechanics and hydraulic machines. Hyderabad [India]: BS Publications, 2008.

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Vol'vak, Sergey. Hydraulics. Workshop. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1045068.

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Study guide corresponds to the program discipline "Hydraulics". Consists of two parts and is for carrying out practical and laboratory works. The first part provides material on the basics of the calculation of hydraulic machines, hydraulic drives of agricultural machinery, systems of land reclamation and hydraulic transport for development of skills of application of theoretical information to solve specific technical problems and development practices of hydraulic calculations. The second part contains material for the study of the methods and instruments for measuring pressure, the study of the equation of Bernoulli, determination of hydraulic resistance, the study of the structure and principles of operation of positive displacement pumps and dynamic-type, cylinders, volumetric hydraulic drive and hydrodynamic transmission elements and schemes of irrigation systems and agricultural water supply. To conduct practical and laboratory classes for students of all forms of training in the direction of training 35.03.06 "Agroengineering", as well as for graduate students, teachers and technical workers of agriculture.
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Stewart, Harry L. Audel Pumps & Hydraulics. New York: John Wiley & Sons, Ltd., 2005.

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Book chapters on the topic "Hydraulic pump"

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Jeffrey, T. D., T. H. Thomas, A. V. Smith, P. B. Glover, and P. D. Fountain. "5. Local pump manufacture." In Hydraulic Ram Pumps, 83–92. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 1991. http://dx.doi.org/10.3362/9781780442471.005.

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Jeffrey, T. D., T. H. Thomas, A. V. Smith, P. B. Glover, and P. D. Fountain. "1. Introduction to the ram pump; Ram pumps in water supply systems." In Hydraulic Ram Pumps, 1–18. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 1991. http://dx.doi.org/10.3362/9781780442471.001.

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Song, Charles C. S., Changsi Chen, Toshiaki Ikohagi, Johshiro Sato, Katsumasa Shinmei, and Kiyohito Tani. "Simulation of Flow Through Pump-Turbine." In Hydraulic Machinery and Cavitation, 277–83. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_27.

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Thackray, P. R., and R. D. James. "Functional Modelling of Pump Volute Geometry." In Hydraulic Machinery and Cavitation, 411–18. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_41.

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Buchmaier, H., B. Quaschnowitz, W. Moser, and D. Klemm. "Numerical Optimization of High Head Pump-Turbines." In Hydraulic Machinery and Cavitation, 160–69. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_15.

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Samani, Zohrab A. "Deep-Well Turbine and Submersible Pump Curves." In Hydraulic and Hydrologic Engineering, 81–85. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003287537-4.

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Grist, Edward. "Hydraulic Performance Loss — Duty Shortfall and Vapour Locking." In Cavitation And The Centrifugal Pump, 89–112. New York: Routledge, 2023. http://dx.doi.org/10.1201/9781315138923-6.

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Mazzouji, Farid, Maryse Francois, Frank Hebrard, Jean Bernard Houdeline, and Daniele Bazin. "Design and Analysis of a Two Stage Pump Turbine." In Hydraulic Machinery and Cavitation, 200–209. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_19.

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Nakamura, T., H. Nishizawa, M. Yasuda, T. Suzuki, and H. Tanaka. "Study on High Speed and High Head Reversible Pump -Turbine." In Hydraulic Machinery and Cavitation, 210–19. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_20.

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Izquierdo, J., P. Iglesias, V. Espert, and V. Fuertes. "Generalization of Pump Station Boundary Condition in Hydraulic Transient Simulation." In Hydraulic Machinery and Cavitation, 720–28. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_73.

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Conference papers on the topic "Hydraulic pump"

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Mauck, Lisa D., and Christopher S. Lynch. "Piezoelectric hydraulic pump." In 1999 Symposium on Smart Structures and Materials, edited by Norman M. Wereley. SPIE, 1999. http://dx.doi.org/10.1117/12.350760.

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Totten, G. E., and R. J. Bishop. "The Hydraulic Pump Inlet Condition: Impact on Hydraulic Pump Cavitation Potential." In SAE Earthmoving Industry Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-1877.

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Mauck, Lisa D., William S. Oates, and Christopher S. Lynch. "Piezoelectric hydraulic pump performance." In SPIE's 8th Annual International Symposium on Smart Structures and Materials, edited by Anna-Maria R. McGowan. SPIE, 2001. http://dx.doi.org/10.1117/12.429662.

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Mauck, Lisa, William Oates, and Christopher Lynch. "Piezoelectric hydraulic pump development." In 41st Structures, Structural Dynamics, and Materials Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2000. http://dx.doi.org/10.2514/6.2000-1789.

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Mauck, Lisa D., Jacqueline Menchaca, and Christopher S. Lynch. "Piezoelectric hydraulic pump development." In SPIE's 7th Annual International Symposium on Smart Structures and Materials, edited by Norman M. Wereley. SPIE, 2000. http://dx.doi.org/10.1117/12.388881.

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Nambiar, Prasanna, Amol Shetty, Amogh Thatte, Shubham Lonkar, and Vishtasp Jokhi. "Hydraulic ram pump: Maximizing efficiency." In 2015 International Conference on Technologies for Sustainable Development (ICTSD). IEEE, 2015. http://dx.doi.org/10.1109/ictsd.2015.7095840.

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Guangzheng, Jia, and Wang Xuanyin. "Design and Control of the Hydraulic Reciprocating Pump." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/fpst-25018.

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Abstract The reciprocating pumps are widely used for transporting fluid in oil field. The flow pulsation and pressure fluctuation in the conventional reciprocating pump with short stroke, high speed and simple harmonic motion of piston driven by crank-connecting rod mechanism are inevitable. For reducing the flow and pressure pulsation, a hydraulic reciprocating pump with the GPCM control by means of normal on-off valve is designed. In order to improve the overall pump performances and life span. fault analysis and optimized design of the pump valve are completed. The mathematical model of the asymmetric cylinder system with PCM valve control used in the hydraulic reciprocating pump is built. The digital simulation about the control system is done, and the result shows that the pulsation of pump discharge flow is improved greatly.
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Shi, Yan, Tiecheng Wu, Andrew R. Plummer, and Maolin Cai. "The Flow Dynamics of an Air-Driven Hydraulic Pump." In ASME/BATH 2015 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/fpmc2015-9570.

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Air-driven hydraulic pumps are widely used to pump high-pressure oil for small hydraulic systems, where it is uneconomic to set up a conventional hydraulic power pack. To obtain good performance of a small hydraulic system, input air flow and output oil flow characteristics of the air-driven hydraulic pump should be properly understood. In this paper, based on a mathematical model which has been experimentally verified, the model of an air-driven hydraulic pump is proposed. Using the software MATLAB/Simulink for simulation, the dynamic characteristics of the pumps are obtained. To set a foundation for the optimization of the pump, the influence of key parameters on the output characteristics of the pump was studied. Through analysis, it can be obtained that, firstly, with an increase in the input air pressure, output oil pressure and area ratio, the ratio of output to input volume flow rate decrease approximately linearly. Moreover, when the output oil pressure was fixed, an energy-saving method to enhance the output oil flow is to enlarge the area ratio of the pump. Furthermore, the output oil flow can be increased rapidly through increasing the input air pressure, but that may result in an increase in compressed air consumption. This research is of use in the performance and design optimization of air-driven hydraulic pumps.
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Chaudhuri, A., J. H. Yoo, N. M. Wereley, and N. Nerssessian. "Scaling-Up Issues With a Magnetostrictive-Hydraulic Pump." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15695.

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A hybrid magnetostrictive hydraulic actuator capable of applying a prescribed pre-stress on the magnetostrictive driver was designed and built. Performance of the pump was analyzed using a 2" long and a 4" long magnetostrictive Terfenol-D rod to address scaling up issues. The peak in output velocity, under no external loading, of both pumps occurred around 3.5in/sec. The 4" pump had a larger frequency bandwidth while the 2" pump exhibited a large drop in output velocity at much lower driving frequencies. The load line of the 4" pump was slightly more shifted to the right compared to the 2" pump, indicating higher blocked force and free velocity. The relatively low increase in performance moving from the 2" to the 4" pump was attributed to lower stiffness of the longer rod and the larger impedance of the 4" long solenoid that caused amplifier saturation and resulted in lower saturation magnetostriction from the Terfenol-D driver.
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Manhartsgruber, Bernhard, and Vito Tič. "Hydraulic pump pulsation using Ionic Liquid." In International conference Fluid Power 2017. University of Maribor Press, 2017. http://dx.doi.org/10.18690/978-961-286-086-8.14.

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Reports on the topic "Hydraulic pump"

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Jokela, Greg, and John Kunsemiller. Demonstration: Seawater Hydraulic Transfer Pump. Phase 2. Fort Belvoir, VA: Defense Technical Information Center, April 1996. http://dx.doi.org/10.21236/adb210667.

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Sharma, Shashi K., Lois J. Gschwender, Carl E. Snyder, Cecere Jr, and Gregory J. B-1 Aircraft Main Hydraulic Pump Tests With MIL-H-87257 Hydraulic Fluid. Fort Belvoir, VA: Defense Technical Information Center, June 1998. http://dx.doi.org/10.21236/ada359968.

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Wilson, T. R. Compressed air piping, 241-SY-101 hydraulic pump retrieval trailer. Office of Scientific and Technical Information (OSTI), December 1994. http://dx.doi.org/10.2172/39098.

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Koons, B. M. Acceptance Test Report for 241-SY Pump Cradle Hydraulic System. Office of Scientific and Technical Information (OSTI), March 1995. http://dx.doi.org/10.2172/48722.

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Sharma, Shashi K., Carl E. Synder, Gschwender Jr., Cecere Lois J., Jenney Gregory J., and Timothy A. Endurance Pump Tests With Fresh and Purified MIL-PRF-83282 Hydraulic Fluid. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada375877.

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Bonney, G. E. Centrifugal slurry pump wear and hydraulic studies. Quarterly technical progress report, January 1, 1987--March 31, 1987. Office of Scientific and Technical Information (OSTI), January 1987. http://dx.doi.org/10.2172/231295.

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Cooper, P. Centrifugal slurry pump wear and hydraulic studies. Quarterly technical progress report for the period of 1 April 1987--30 June 1987. Office of Scientific and Technical Information (OSTI), December 1987. http://dx.doi.org/10.2172/231335.

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Spiliotopoulos, Alexandros A. Systematic Method for Evaluating Extraction and Injection Flow Rates for 100-KR-4 and 100-HR-3 Groundwater Operable Unit Pump-and-Treat Interim Actions for Hydraulic Containment. Office of Scientific and Technical Information (OSTI), March 2013. http://dx.doi.org/10.2172/1079928.

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Leoni, Paolo, and Gunnar Lennermo. Integration concepts of decentral ST systems in DHC. IEA SHC Task 55, June 2020. http://dx.doi.org/10.18777/ieashc-task55-2020-0016.

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This factsheet focuses on the integration hydraulics and control of central ST systems in DHC. The first part gives an overview of decentral feed-in: international state of the art (including comparison and selection criteria of the different integration schemes), hydraulics and components, details of the return-to-supply scheme (challenges, pump operation, control). The second part describes concepts for the secondary-side integration of ST without feed-in. The third part illustrates selected best-practice examples in Austria (Wasserwerke Andritz and Berlinerring in Graz) and Sweden (Ystad).
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Ramsey, J. Michael. Nanofluidic Structures for Electrokinetic-Based Hydraulic Pumps. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/839258.

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