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Shaft power measurement

By means of strain gauge measurement, Techno Fysica is able to determine torque or shaft power on any type of installation in the field. The only condition is that there be a free length of shaft that can serve as ‘measuring element’. This can be carried out in service and measurements can be done on massive as well as hollow shafts.

This type of measurement can be carried out with battery-fed telemetry systems for a shorter period of time, but also long-term measurement via systems without batteries is possible. An extension of this type of measurement is the permanent installation which we can also arrange for you. Here, of course, extra attention needs to be paid to robustness and stability.

Aside from mean torque and average power, it is always possible to measure dynamic situations, such as peaks, clutch operations or torsional vibrations.

  • The following types of measurement are available:
    Shaft power measurement on a propeller shaft, in order to check whether propeller and engine have been properly chosen and adjusted. This is done on newly built ships but also before or after revision/ updates in order to check whether everything meets regulations.
  • In combination with fuel consumption measurement and registration of a ship’s speed, propulsion efficiency is obviously the next stage. In bollard pull condition this efficiency can also be expressed in thrust per kilowatt, which can, for example, also be interesting for bow thrusters. The effect of fuel additions can also be researched this way.
  • Temporary shaft power measurement parallel to existing permanent measurement, in case these seem unreliable or need to be adjusted.
  • Shaft power measurement on pump shafts, such as for renovation of pumping stations, but also in combination with pressure difference and flow measurement in order to record pump characteristics and to optimise the operating conditions.
  • Measurement clutch-in behaviour of clutches in combination with the pressure of the control circuit in order to optimise clutch behaviour and minimise load and wear.
  • Measurement of average and peak torque in the drive shaft of cutter suction dredgers so the production can be optimised and to protect the gear box and other components.

A great many options are available, from measuring driving torque in dosing pump, steering shafts in old-timers and mounting adapters for hole saws, to bridges, waterway locks and steel rolling mills.