Anti Vibration Mounts

[JP6]

Hi,

We are trying to solve a noise complaint with one of our customers, where a couple of comms room condensing units are located high level on the outside of their office wall on strut and cantilever brackets. Condenser feet are bolted directly to the cantilevers, does anyone know of an antivibe mount that can go between the condenser feet and cantilever brackets? Basically when the compressors run it resonates through the wall into the office area and is giving people headaches.

I see pump house do some rubber mounts, but I don't know if they are man enough for the job, looking for something a bit more heavy duty as both units are Mitsi P series size 100s, so 120kg + each.

[Grizzly]

Hi JP
Check out the link below for Rawnut flexiplugs, they are designed for holding down sleeping policemen in tarmac Etc.
Where the substrate is not solid. I have also used these to great success on racking and barrier feet.
Because as the compress they deform and therefore when hit by say a fork truck.
The fixing just pops out, as the whole they are inserted into is preserved. Just undoing the bolt allows the rubber insert to take on it's original parallel sided shape.
Result- reinsert fixings and tighten barrier or rack foot back in place.

For your dilemma they are vibration resistant, so used with some Ticopad, you should eliminate the resonance causing al the problems?
Grizzly

http://www.rawlplug.co.uk/en/products/lightweight-fixings/special-fixing/rawlnut-flexi-plugs/rawlnut-flexi-plug/

http://www.tiflex.co.uk/tico/tico_low_freq.html

[JP6]

Thanks Grizzly, we've used these before on potted ceilings etc and they are good, the problem we've got though is that would involve redrilling the holes and dropping the condenser etc. The first option we are looking at is to keep the condenser in position and put some sort of mounts under the feet with them in position to keep costs down. If this doesn't work, or we can't find something then we will have to look at putting the condenser in a different location, probably on the floor rather than the wall but space is an issue.

[chemi-cool]

Check amount of oil in the compressors, what you describe is common when the condensing unit is higher then the evaporator.

Instead of fighting vibrations, locate the part that causes vibration, it will be easier to work it out.

Condensing unit doe's not vibrate, compressors, pipework, oil separators, fans, electro valves, one of them causes the problem.

[JP6]

It's just the normal running noise of the condenser, these units are 10 years old and run 24/7. It's a very faint noise but enough for people to hear through a thin wall in a quiet office, more the running sound of a compressor.

Evaporators are higher than the condensing units in this case too.

[hookster]

There are a lot of vibration mounts that you can use RS Components search will assist you.
http://uk.rs-online.com/web/c/fasteners-fixings/levelling-vibration-control/fixed-height-mounts-feet/

I am pretty sure though you will have to check your pipe installation as this may also be transmitting the vibration.

[Brian_UK]

You need some proper anti-vibration-mounts mounts such as these....
http://www.antivibrationcomponents.co.uk/en/catalog/mounts/anti-vibration-mounts/fail-safe/p2100

You might also need to isolate the pipework.

[JP6]

You need some proper anti-vibration-mounts mounts such as these....
http://www.antivibrationcomponents.co.uk/en/catalog/mounts/anti-vibration-mounts/fail-safe/p2100

You might also need to isolate the pipework.


Ah this looks like what I'm after, cheers.

[Grizzly]

Spot on Brian.
Good to see the grey cells are still working, albeit at a calmer pace:D
Grizzly