Dynamic Response Analysis of the Main Plunger in A Two-stage On/Off Poppet Valve for the Digital Hydraulics Field

Authors

  • Essam Elsaed 1) Faculty of Engineering and Natural Sciences, Tampere University, Finland 2) Faculty of Engineering Ain Shams University, Egypt https://orcid.org/0000-0003-3133-4655
  • Matti Linjama Faculty of Engineering and Natural Sciences, Tampere University, Finland

DOI:

https://doi.org/10.13052/ijfp1439-9776.2532

Keywords:

Digital hydraulics, Multistage valves, on/off valves, high-flow valves, cartridge valves

Abstract

The necessity for greater energy conservation in hydraulic machinery is highlighted by escalating fuel costs and heightened ecological awareness. Utilizing independent metering to enhance the energy utilization of hydraulic actuators is one effective strategy, yet the market is short on efficient reversible proportional valves that can perform this function. For handling modest flow rates up to 150 Liters per minute, the digital hydraulic method utilizing fast direct operated on/off solenoid valves shows promise; however, solutions for managing larger flows remain vague. This research explores the application of pilot-operated solenoid valves in digital hydraulic systems designed for substantial flow volumes. It establishes a model grounded in physical principles to examine how various factors influence the valve reaction speed. A unique valve design was established, derived from an existing valve but with a modified structure.

The findings indicate that the pressure difference, viscosity of the fluid and pilot plunger dynamics are crucial determinants of the valve response time. Incorporating a stroke limiter proves significant in harmonizing the response times across valves with varying flow rates, while the traditional methods of deploying serial orifices is deemed unsuitable. A glance from the results shows that at a Δ
P of 10 bar, the valve with an 8 mm attached serial orifice has an opening response of 65 ms, while the stroke limited valve achieves 40 ms. This significant advantage slightly narrows at higher pressures, stabilizing at 100 bar. During closing, the stroke limiter is remarkably 60% faster at 10bar, and both configurations settle at 40 ms at 200 bar.

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Author Biographies

Essam Elsaed, 1) Faculty of Engineering and Natural Sciences, Tampere University, Finland 2) Faculty of Engineering Ain Shams University, Egypt

Essam Elsaed Is a researcher at the Automation Technology and Mechanical Engineering Unit, Tampere university. Finland.

https://orcid.org/0000-0003-3133-4655

Matti Linjama, Faculty of Engineering and Natural Sciences, Tampere University, Finland

Matti Linjama obtained a D Tech degree at Tampere University of Technology, Finland, in 1998. Currently, he is an adjunct professor at the Automation Technology and Mechanical Engineering Unit, Tampere University. He started the study of digital hydraulics in 2000 and has focused on the topic since then. Currently, he is a leader of the digital hydraulics research group, and his professional interests include the study of hydraulic systems with high performance and energy efficiency.

https://orcid.org/0000-0002-4861-5624

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Published

2024-10-05

How to Cite

Elsaed, E., & Linjama, M. (2024). Dynamic Response Analysis of the Main Plunger in A Two-stage On/Off Poppet Valve for the Digital Hydraulics Field. International Journal of Fluid Power, 25(03), 325–348. https://doi.org/10.13052/ijfp1439-9776.2532

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Section

SICFP23