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The Tower Press for Obtaining Olive Oil: Analysis through Computer-Aided Engineering

Author

Listed:
  • José Ignacio Rojas-Sola

    (Department of Engineering Graphics, Design and Projects, University of Jaén, 23071 Jaén, Spain)

  • Eduardo De la Morena-De la Fuente

    (‘Engineering Graphics and Industrial Archaeology’ Research Group, University of Jaén, 23071 Jaén, Spain)

  • Manuel Jesús Hermoso-Orzáez

    (Department of Engineering Graphics, Design and Projects, University of Jaén, 23071 Jaén, Spain)

  • David Hernández-Díaz

    (Department of Engineering Graphics and Design, Serra Hunter Programme, Polytechnic University of Catalonia, 08222 Terrassa, Spain)

Abstract

This article analyzes a large tower press used to press crushed olives to obtain olive oil. To this end, a study of computer-aided engineering (CAE) was carried out using the parametric software Autodesk Inventor Professional, consisting of a static analysis using the finite-element method (FEM) of the 3D model of the press under real operating conditions. The tower press has been analyzed in two limit positions: in the rest position, supported on two pillars, and the pressing position, supported on the set of filter discs (basket load) called ‘cargo de capachos’ that contained the previously ground olives. In the first position, static analysis revealed that the maximum von Mises stress was 22.7 MPa, located on the axle of the roller, but this is far from the elastic limit. Moreover, the lowest safety coefficient is 11.16, produced in the contact between the tower and the right pillar and well above the optimal range between 2 and 4. On the other hand, it hardly presents equivalent displacements or deformations that would endanger the operation of the set. The greatest displacement would be in the wooden guide (0.123 mm) and a deformation of 0.027% with respect to its length. These values confirm that, in this position, the tower press was clearly oversized. However, the results obtained regarding the second position are not entirely conclusive. Although the values of the displacements and the equivalent deformations are low, with results similar to those obtained in the first position, with a maximum displacement of 0.1315 mm located in the horizontal beam of the support structure and a maximum equivalent deformation of value 0.385%, located in the contact between the screw and the nut, the same does not happen with the von Mises stress. The software did not obtain a convergent result due to the frustoconical geometry of the bolt that joins the screw and nut, adopting a maximum value of 508.3 MPa. For this point, the safety coefficient is 1.49, which reveals a sizing problem with the proposed solution of resizing the screw thread, giving it more robustness. The rest of the elements work with a safety coefficient above 4.33 so they are also clearly oversized, according to current criteria.

Suggested Citation

  • José Ignacio Rojas-Sola & Eduardo De la Morena-De la Fuente & Manuel Jesús Hermoso-Orzáez & David Hernández-Díaz, 2020. "The Tower Press for Obtaining Olive Oil: Analysis through Computer-Aided Engineering," Agriculture, MDPI, vol. 10(11), pages 1-25, November.
    • Handle: RePEc:gam:jagris:v:10:y:2020:i:11:p:554-:d:447376
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    References listed on IDEAS

    as
    1. Spyros Niavis & Nikos Tamvakis & Basil Manos & George Vlontzos, 2018. "Assessing and Explaining the Efficiency of Extensive Olive Oil Farmers: The Case of Pelion Peninsula in Greece," Agriculture, MDPI, vol. 8(2), pages 1-13, February.
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