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  • Are mechanical systems more efficient than hydraulic ones?

    Discussion in 'The main mechanical design forum' started by narayan821, May 13, 2022.

    1. narayan821

      narayan821 New Member

      May 2022
      Likes Received:
      Scenario 1:
      I need to increase RPM before transmitting motion to a generator. Is a gearbox more efficient and cost effective, or should I use a hydraulic method: transfer the motion to a radial piston pump, which outputs high pressure fluid, then use a hydraulic turbine connected to the same generator.

      Scenario 2:
      Just in general, what are the advantages of using mechanical systems over hydraulic, assuming the overall functionality is more complex than just a pump for example.
    3. s.weinberg

      s.weinberg Well-Known Member EngineeringClicks Expert

      Nov 2012
      Likes Received:
      I believe a simple gearbox is typically far more efficient than transfer via a hydraulic system. With a simple spur gearbox, you're probably looking at somewhere around 99%+ efficiency, whereas a hydraulic system is likely in the 80%-90% range.

      Hydraulics are really great if you're generating large forces in a small system, covering long distances, or serving many devices from a single source.

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