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Simulation of leaka...
Simulation of leakage flow through dynamic sealing gaps in hydraulic percussion units using a co-simulation approach
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- Andersson, Håkan (författare)
- Linköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten,Epiroc, Tools & Attachments Division, Dragonvägen 2, Kalmar, 391 27, Sweden
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- Holmberg, Joakim (författare)
- Linköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten
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- Simonsson, Kjell (författare)
- Linköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten
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visa fler...
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- Hilding, D. (författare)
- Dynamore Nordic AB, Brigadgatan 5, Linköping, 587 58, Sweden
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- Schill, M. (författare)
- Dynamore Nordic AB, Brigadgatan 5, Linköping, 587 58, Sweden
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- Borrvall, T. (författare)
- Dynamore Nordic AB, Brigadgatan 5, Linköping, 587 58, Sweden
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- Sigfridsson, E. (författare)
- Epiroc, Tools & Attachments Division, Dragonvägen 2, Kalmar, 391 27, Sweden
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- Leidermark, Daniel (författare)
- Linköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten
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(creator_code:org_t)
- Elsevier B.V. 2021
- 2021
- Engelska.
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Ingår i: Simulation (San Diego, Calif.). - : Elsevier B.V.. - 1569-190X .- 1878-1462. ; 111
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this study, a previously developed co-simulation method has been expanded to also simulate the dynamic behaviour of sealing gap regions in hydraulic percussion units. This approach is based on a 1D system model representing the fluid components and a 3D finite element model representing the structural parts of a hydraulic hammer. The sealing gap is a fundamental feature of a percussion unit, where the reciprocating motion of the piston is generated by the valve mechanism of the sealing gap. When the gap is closed it will prevent fluid flow between regions of different pressure levels. However, a small leakage flow through the gap will always occur which size depends on the clearance and the position of the piston. The method proposed here will take the structural motion and deformation into consideration when calculating the leakage flow. The deformed state of the structure is approximated by a cylindrical surface, in a least square manner, and communicated through the co-simulation interface to the fluid simulation module, and then used when calculating the leakage flow. This method aims at a more accurate simulation of the leakage flow that will not only yield a more realistic description of the mechanism on the local level, but also a more accurate estimation of global parameters such as overall performance and efficiency. The results indicate that the simulated leakage flow will decrease when dynamic gaps are used in comparison to static gaps, which is a consequence of the deformed structure that will generate smaller clearances. The leakage flow for the dynamic gaps will even be lower than for the static perfectly concentric case, mainly due to the reduction of clearances. The results also indicate that the dynamic eccentricity does not have a major influence on the leakage flow. The outcome from this study highlights the potentials of the described co-simulation approach for analysing the dynamics of the sealing gaps in a hydraulic percussion unit (i.e. gap heights, eccentricity ratios, etc.) including the evaluation of leakage flows and its impact on the overall performance. © 2021
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Nyckelord
- Co-simulation; FEM; Fluid power machinery; Fluid–structure coupling; Sealing gap; System simulation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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