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Title: PUMPING UNIT EQUIPPED WITH OSCILLATING HYDRAULIC PRESSURE INTENSIFIER FOR CYLINDERS WITH SMALL OVERALL SIZES AND LARGE LOADS THROUGHOUT THE STROKE
PUMPING UNIT EQUIPPED WITH OSCILLATING HYDRAULIC PRESSURE INTENSIFIER FOR CYLINDERS WITH SMALL OVERALL SIZES AND LARGE LOADS THROUGHOUT THE STROKE

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Teodor Costinel Popescu; Alexandru-Polifron Chiri?a; Ana-Maria Carla Popescu; Andrei Vlad; Alina Iolanda Popescu
10.5593/sgem2022/1.1/s03.040
10.5593/sgem2022/1.1
1314-2704
978-619-7603-38-5
English
22
1.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Exploration and Mining
Conveyance of goods and travelling of persons through the tunnels of mines or subway is done on railways of narrow or normal gauge. In interventions in case of accidents, hydraulically operated installations with small dimensions are used for lifting and rerailing the derailed rolling stock. They include hydraulic jacks (double or single acting hydraulic cylinders), supplied with low flow rates at high pressures. Feeding of hydraulic cylinders for lifting and relocating the derailed rolling stock is usually done by means of high-pressure pumps, manually operated or driven by electric / thermal motors.
The authors propose the use of a more cost-effective pumping unit with low-pressure pump and oscillating hydraulic pressure intensifier for this kind of applications - and for similar ones that involve interventions in narrow workspaces.
Such pumping units are usually used in applications designed to achieve and maintain high pressures, either in the volumes of enclosed spaces (endurance tests for pipes and tanks) or at the active stroke end of hydraulic cylinders (hydraulic presses).
The authors demonstrate, on an experimental test bench, that the displacement of a highpressure hydraulic cylinder, with constant load over the entire stroke, can take place safely even if a low-pressure pumping unit, equipped with oscillating hydraulic pressure intensifier powers it.
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[6] Espersen C., Pressure Boosters in Hydraulic Systems A Solution Which Is Often Overlooked, Accessed May 20, 2022, https://nanopdf.com/download/pressure-boostersin-hydraulic-systems_pdf ;
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[8] Levinsen A., Scanwill fluid power Unique hydraulic pressure intensifier solutions, Accessed May 16, 2022, https://www.luvra-hydraulik.de/fileadmin/web_data/downloads/LuvraHydraulikScanwill-0915.pdf;
[9] Gunayd?n A.C., Halkac? M., Ates F., Halkac? H.S., Experimental Research of the Usability on Double Acting Intensifiers in Hydroforming, MATEC Web of Conferences, ICMSC 2018, Russia, vol. 220, article no. 04001, 2018, DOI: 10.1051/matecconf/201822004006.
The research presented in this paper has been developed under Financial Agreement no. 272/24.06.2020, signed by the Ministry of European Funds / Ministry of Education and Research and S.C. HESPER S.A. Bucharest for the Innovative Technological Project titled “Digital mechatronic systems for generating pressure of 1000 bar, using hydraulic pressure intensifiers (SMGP)”, project under implementation from 01.07.2020 to 30.06.2023. Financial support has also been granted under a project funded by the Ministry of Research, Innovation and Digitalization through Programme 1- Development of the national research & development system, Sub-programme 1.2 - Institutional performance - Projects financing the R&D&I excellence, Financial Agreement no. 18PFE/30.12.2021.
conference
https://doi.org/10.5593/sgem2022/1.1/s03.040
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
347-354
04 - 10 July, 2022
website
8427
Pumping unit, low pressure, oscillating hydraulic pressure intensifier, hydraulic cylinder, displacement under load

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