Search results for: HYDRAULIC VALVE

• Effect of Simultaneous Valve Closures in Hydraulic Piping Systems

  Publication

  • K. Urbanowicz
  • I. Haluch
  • A. Bergant
  • A. Deptuła
  • P. Śliwiński

  - Year 2023

  The paper investigates wave interference (between pressure waves) occurring in simple hydraulic systems. Water hammer was induced by simultaneous closure of three valves located at the reservoirs of a “Y” type hydraulic system. Numerical simulations were carried out with the help of the freeware computer package Allievi enabling the reader to replicate results in a direct manner. The influence of the following quantities has been...

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• Hydraulika i Pneumatyka

  Journals

  ISSN: 1505-3954

• Hydraulic valve design methodology for hydro turbine control system

  Publication

  • M. Kosek
  • P. Śliwiński
  • D. Downar

  - FLOW MEASUREMENT AND INSTRUMENTATION - Year 2024

  The control of the turbine and its equipment in a hydroelectric power plant requires the HPU (hydraulic power unit) to deliver large volumes of working fluid in a short time at specific optimum control parameters. The use of typical proportional flow control valves created by manufacturers of hydraulic components in low-pressure control systems is disadvantageous due to high pressure losses in the control chambers. This paper presents...

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• DIGITAL HYDRAULICS CIRCUIT BASED ON PWM FUNCTION FOR CONTROLLING HYDRAULIC ACTUATOR POSITION

  Publication

  • J. Zubair Ahmed
  • P. Śliwiński
  • K. Kędzia

  - Year 2022

  Hydraulic systems are used in many different industries, such as multi-source hydrostatic drive systems. In traditional hydraulic systems, a proportional servo valve is used to control the position of hydraulic actuators. The low energy efficiency and high cost of these control valves are two major problems with these systems. Digital hydraulics is one of the most unique ideas on how to solve these problems. Researchers like digital...

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• Initial Investigation of Wave Interactions During Simultaneous Valve Closures in Hydraulic Piping Systems

  Publication

  • K. Urbanowicz
  • I. Haluch
  • A. Bergant
  • A. Deptuła
  • P. Śliwiński

  - WATER RESOURCES MANAGEMENT - Year 2023

  The effects of interference of pressure waves in simple piping systems were studied. A freeware computer code Allievi developed at the University of Valencia was used to simulate dynamic waveforms in simple and complex networks. The tests were carried out according to three scenarios. No pressure increases significantly exceeding the Joukowsky pressure in simple cases were noticed. When the effects of the simultaneous closing of...

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• Salve

  Journals

  ISSN: 1213-6301

• Nowe rozwiązania w hydraulice przemysłu maszynowego - prace badawcze w Katedrze Hydrauliki i Pneumatyki

  Publication

  • R. Jasiński
  • A. Balawender

  - Year 2005

  W referacie przedstawiono osiągnięcia Katedry Hydrauliki i Pneumatyki Politechniki Gdańskiej.W chwili obecnej uruchamiana jest produkcja pomp wielotłoczkowych PWK o stałej wydajności. Strategicznym celem jest zbudowanie jednostek o zmiennej wydajności. Hydrostatyczne zrównoważenie mechanizmu rozrządu pozwala bowiem zrealizować unikalny w skali światowej mechanizm bezpośredniego sterowania wydajnością pompy za pomocą elementu o...

• Energy efficiency of hydraulic systems with hydraulic cylinder under proportional control

  Publication

  • D. Piątek

  - Year 2006

  W artykule przedstawiono wyniki badań strat i sprawności siłownika zasilanego w trzech strukturach sterowania dławieniowego szeregowego. Na podstawie bilansu energetycznego układu hydraulicznego, przeprowadzono analizę pracy siłownika w układzie stałociśnieniowym, ze szczególnym uwzględnieniem wpływu wielkości maksymalnego pola szczeliny dławiącej rozdzielacza.

• ISH Journal of Hydraulic Engineering

  Journals

  ISSN: 0971-5010

• JOURNAL OF HYDRAULIC ENGINEERING-ASCE

  Journals

  ISSN: 0733-9429 , eISSN: 1943-7900