20 August 2018

Alignment solutions for the maritime industry

It’s time again for SMM, the world’s No.1 fair for the maritime industry. Here’s some of what we will show there!

There are many applications for laser measurement at a shipyard, such as when building new ships, repairing damaged ones and for regular maintenance. With the SMM exhibition coming up we thought it would be a good idea to tell you more about our solutions for this sector.

The importance of shaft alignment

Achieving a satisfactory shaft alignment is paramount for the safe and reliable operation of a ship during its lifetime. An unexpected shafting system problem, for example, failure of a stern tube bearing due to misalignment, leading to an emergency dry-docking and consequent loss of availability, can cost well in excess of $250,000 per incident for a small vessel. More serious problems, for example, involving a bent shaft and replacement for a larger vessel, can cost in excess of $1 million. [Source: Royal Belgian Institute of Marine Engineers]

Laser shaft alignment of propeller drive line.

Alignment of the propeller shaft and the gearbox is carried out with shaft alignment equipment like for example Easy-Laser® E710, with measuring units mounted on either side of the coupling. Large shafts and couplings can sometimes be difficult to rotate. Then a laser system like this with the possibility to calculate the alignment values with the need of just a small rotation like 40° is very useful.

Another example of what you can do with Easy-Laser is to check bearing play.
Read more about that in this interesting article.

Line bore applications

The alignment of bearing journals in relation to the stern tube (or gearbox) is carried out using a laser transmitter mounted on the axial surface at one end of the stern tube (or the gearbox flange) and a detector unit placed in the bearing position. The straightness of the stern tube itself is measured with a self centering bracket (pictured below). Many large manufacturers of diesel engines also use our bore alignment systems to measure the bearing journals of the engine.

Measurement of stern tube straightness with self centering bracket.

Flatness measurement

Harbours and ships sometimes have swivelling cranes. For these to work problem free, the bearing has to be flat. When measuring the flatness of a slewing ring bearing for a crane, a separate laser transmitter like the Easy-Laser D22 is used. The transmitter is secured to the flange with its magnets, and the detector is placed on assigned points at the bearing. The system automatically calculates best-fit results for optimum adjustments.

Flatness measurement is carried out e.g. on crane slewing bearings.

Customized solutions

Easy-Laser® have an extensive knowledge within measurement and alignment for the shipping industry. We have developed alignment systems for single bearing drive lines, and customer adapted solutions for drive lines with rubber lined bearings. Other applications suitable for our laser systems is alignment of rudder bearings and water jet installations.

Come talk to us at SMM about your measurement and alignment needs! You find us in stand A3.414.
The exhibition is open 4-7 September.

Visit the SMM web page  

Subscribe to our newsletter

Stay up to date with the latest news from Easy-Laser. 

I accept the terms in the Privacy policy
Straightforward by all measures!
18 June 2020

Straightforward by all measures!

Sure, we know that Easy-Laser is the world leader in laser alignment equipment. But how can we better describe what we do, and how we do it? Back in 2012 we set out to put words on our company culture – and our core values were born. Read more
Complex jackshaft alignment made simple
02 June 2020

Complex jackshaft alignment made simple

When you are working with nature, you treat it with respect. And that’s what this dam facility on the Kootenay River in British Columbia, Canada does. Our partner was part in a large project where the spillway gate control system was being replaced. Read more