anyone knows where is the vibration dampener for this engine? i couldnt find the manual

and what does the vibration dampener does in terms of triaxial vibration?

appreciate ur comments

Vibration dampers are used for dampening torsional vibration in reciprocating engines. In case of Wartsila DG sets, it is mounted towards non drive end before ist crank in a housing and filled with silicon fluid.

The damper is an enclosed cylinder on front of engine (NDE). It is for damping torsional vibrations. If it is defective, then lateral vibrations (tri-axial) can increase.

Walt

CAT-3306_Damper.pdf (100 Kb, 24 downloads) Engine Photo

Thanks all

My current engine having high horizontal vibration only. Engine NDE reaching 10mm/s rms dominant engine speed.

SO i suspected worn out vib dampener.

[QUOTE]Originally posted by Junior CBM Analyst:
Thanks all

My current engine having high horizontal vibration only. Engine NDE reaching 10mm/s rms dominant engine speed.

SO i suspected worn out vib dampener.[/QUO

I don't know the KVA rating of your engine but 10mm/sec RMS is not a high value for reciprocating engines.

For me its quite high since normal trend around 3-5 mm/s only.

I tried hard to find Caterpillar engine vibration limit but could not getting any, even from the OEM

Hello Vibuser,

You need to provide more info, as to why you suspect the dampener that is causing the high vibration condition. Post some spectra and if your normal trend is 3 - 5 mm/s, needless to say 10 mm/s is something to be concerned about. What is the engine driving and how is the vibration on the driven, do you see an increase there, too?
2 things to be mindful of when you have vibration increase on these units, 1) engine firing faults ie. misfiring or not at all. The ignition system is Altronics (Electronic) and one or more of these may have failed. If you are using a CSI Analyser you'll find the analyzer will power off when you mount the accelerometer close the these magnetos, due to failed units grounding; 2) Vibration isolators between the skid and engine base/footings may be damaged, look for visible signs of cracks or measure spring (if spring type) heights inconsistencies.
Hope this helps.

Cheers...Rajan Muthukrishnan

If vibration is high only in horizontal direction I would suspect a loose or damaged engine mount and not the damper.

Walt