For the building of new ships and repairs
Alignment between propeller shaft and main machine/gearbox
Aligning the auxiliary machine
ALIGNMENT OF BEARING JOURNALS IN RELATION TO STERN TUBE
The alignment of bearing journals in relation to the stern tube (or gearbox) is carried out using bore alignment equipment. As the measurement is performed in the centre of the bearing, the instruments are suitable for both small and large shaft diameters. The measurement method is based on a laser transmitter being mounted on the axial surface at one end of the stern tube (or on the gearbox flange or in the final support bearing) and the detector unit being placed in the bearing journal. Measurement values are recorded for each bearing journal, the measurement program calculates and then displays the position in the vertical and horizontal directions. As adjustment is performed on land or in the dock, compensation values can be entered if required in order to correspond with the position of the bearings when the vessel is in the water.
FLATNESS MEASUREMENT OF SLEWING RING BEARINGS
CHECKING BEARING PLAY
It is possible to check whether the bearing play is within tolerance by installing measurement units on the shaft and on fixed components in the machinery. After this, the shaft is lifted with a pulley or jack, and the movement (the play) is recorded. Read more about this in this blog article about the tourist boat MS Tonne.
CHECKING AND MEASURING WHEN THE VESSEL HULL HAS BEEN REDESIGNED
An unusual application! However, this is actually just a variant of the normal straightness measurement, where Easy-Laser is used for rough alignment. We’re not talking about hundredths of a millimetre here…
Mauro Regali at Azzurra Tecnology has considerable experience of complicated measurements. In this case, the front and rear sections had to be positioned a little way apart in order to be able to extend the hull (see picture).
Easy-Laser possesses extensive knowledge in the fields of measurement and alignment for the shipyard industry. We have developed alignment solutions for “single bearing drive lines”, as well as customised solutions for drive lines with water-lubricated rubber bearings.
Depending on which applications you need to align, we can put together a measurement system that meets your particular requirements. By combining components from e.g. a bore alignment system and a shaft alignment system in a smart manner, you can obtain an extremely cost-effective solution. This makes Easy-Laser perfect for service companies and machine installers whose assignments cover a broad range. A good example of this is On Site Alignment, which uses Easy-Laser and is a specialist in vessel applications. Please feel free to visit On Site Alignment’s website.