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Tester keeps watch on drive system alignment

A KTR Couplings product story
Edited by the Engineeringtalk editorial team Nov 30, 2006

Compact mobile measuring device helps in preventive maintenance of couplings with no need for vibration analysis.

Condition monitoring of driving components ensures a higher availability of machines and plants.

If failures or starting wear are recognised and indicated at an early stage, the user benefits from a higher safety in production and a lower risk of periods of standstill.

This was the initial consideration of KTR's design engineers to develop a simple, low-cost and compact monitoring system for Rotex couplings.

This coupling series comprises the driving components used most frequently around the world which have proven their worth on different applications with a long service life and which support the long service life of the entire drive system by compensating for axial, radial and angular displacements and damping vibrations.

Rotex is not protected against wear caused, for example, by too high shaft displacements, either.

In fact, the general condition of the elastomer can be inspected externally while being assembled.

However, up to now a vibration analysis had to be performed in order to determine the wear of the coupling in detail.

Such kind of analysis is very time-consuming and only informative if the amount of wear on a coupling has already advanced quite far.

As an alternative, the drive can be disassembled to inspect the coupling at standstill - a procedure which takes time and which has a standstill of machines as a consequence.

Now there is a third innovative and much more practical solution: Monitex.

Here a compact mobile measuring device with a special light barrier detects the twisting angle during the operation, and consequently the wear of the spider.

Different from the usual measuring processes, the coupling does not have to be modified for monitoring.

The operator keeps the device in front of the Rotex or Rotex GS, respectively, starts with the measuring process and reads off the measuring result: there is definitely no easier way.

If the coupling was installed in a position of difficult access, there is no option to make use of an external sensor.

If the twisting angle exceeds the preset limit, the Monitex system gives a signal indicating that the drive needs maintenance to be carried out.

The integrated interface allows the user to select and store data so that, for example, modifications of the load curves can be detected quickly.

Apart from the twisting angle, the system indicates the current speed.

As a result two important parameters are available in parallel.

Monitex does not only monitor the coupling, but the entire drive system.

The wear of a coupling often points to other failures like high shaft displacements which can be detected and removed in this way before bigger damages are caused.

It goes without saying that this benefit can also be used if the system is retrofitted on existing Rotex or Rotex GS applications.

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