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Hydraulic-Mechanic Damper Concept for Thruster Ice Impact Load Reduction

[+] Author Affiliations
Lauri Siivonen, Jyrki Tammisto, Kalevi Huhtala

Tampere University of Technology, Tampere, Finland

Olli Tiainen

Ponsse Plc, Tampere, Finland

Paper No. FPMC2018-8890, pp. V001T01A045; 10 pages
  • BATH/ASME 2018 Symposium on Fluid Power and Motion Control
  • BATH/ASME 2018 Symposium on Fluid Power and Motion Control
  • Bath, UK, September 12–14, 2018
  • Conference Sponsors: Fluid Power Systems and Technology Division
  • ISBN: 978-0-7918-5196-8
  • Copyright © 2018 by ASME


A novel hydraulic-mechanic damper was designed and dimensioned for damping of ice loads of a steerable thruster. The system consists of inertia masses and four hydraulic cylinders acting as spring and damping elements. The system is energy self-sufficient and fail-safe. Simulation model is used to study the damping potential and applicability of the system. Comparison between system with and without dampers showed clear advantages and potential for effecting the life time of the thruster gearbox.

Copyright © 2018 by ASME
Topics: Stress , Dampers , Ice



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