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Vibration Damping Compound

Vibration Damping Compound

Vibration Damping Compound

(OP)
Hello, I am looking for a vibration  damping compound to be  used  to fill a  1" gap between a concrete dynamometer  base and the surrounding floor slab.  Any ideas on a product  for this application?

Thank you,

RE: Vibration Damping Compound

Sorbothane?

RE: Vibration Damping Compound

(OP)
I need to fill the 1"  gap to isolate vibrations, reduce noise and protect the floor slab.  This is an old installation, there used  to some sort of elastomeric material  in this gap,  it  has however dissapeared with the years and the  gap is now full of dirt and debris.  The contact material  would  be concrete on both sides. I guess  there should  be some sort of silicone-like product that may be inyected in the gap.  The material  must be oil resistant.

RE: Vibration Damping Compound

Tar?

Nick
I love materials science!

RE: Vibration Damping Compound

I second the tar, cheap and available.

RE: Vibration Damping Compound

This could be costly but it depends on your level of protection http://www.earsc.com/

Heckler   americanflag
Sr. Mechanical Engineer
SWx 2007 SP 4.0 & Pro/E 2001
      o
  _`\(,_
(_)/ (_)

"Avoid the base hypocrisy of condemning in one man what you pass over in silence when committed by another." -- Theodore Roosevelt

RE: Vibration Damping Compound

A castable urethane would be the ticket. There is a little problem though with the environment, the gas and oil. Urethane doesn't like either one. I would contact the Devcon technical staff and get their opinion and any possible workaround. There might be some coating or additive that would protect the Urethane.

We used the Devcon materials to isolate some large fan motors

http://www.devcon.com/devconcatsolution.cfm?catid=14

RE: Vibration Damping Compound

No physical material will provide better isolation (reduced vibration transmission) than a gap (ie, things not touching each other).

What do you really need to do?

RE: Vibration Damping Compound

two part polysulfide rubber

RE: Vibration Damping Compound


 I know many large diesel engines use a compound called Chockfast ( i think the spelling is correct)for alignment and vibration damping. It will be resistant to oil and diesel , as it is generally located in the bilge area.

RE: Vibration Damping Compound

I agree with MintJuep, clean out the gap and install a flexible joint cover to keep stuff out of the joint.  There may be a reason the original joint material is gone; it shouldn't have been there.

Ted

RE: Vibration Damping Compound

Urethane is like a spring.

Tar-like compounds or tapes are good damping media. The remaining problem is how you keep the slab from settling in time. Two grades of asphaltic material: one generally dispersed and the other harder like feet to arrest rapid settling.

RE: Vibration Damping Compound

(OP)
I think  I will agree  with MintJulep and hydtools that the best is to  simply clean the  gap and leave it empty.   I  would think tar is too rigid.

Thank  you all for your suggestions.

RE: Vibration Damping Compound

What is the dyno base sitting on?  Cork, soil, ????

RE: Vibration Damping Compound

(OP)
Soil,  according to the drawings

RE: Vibration Damping Compound

http://www.dynemechsystems.com/gifs/foundation-isolation.jpg

About all that can be reliably gained with a separate foundation resting on soil is the separate foundation can be thicker and proper width and length.  This can be very important.

"Isolating" without genuine isolation (flexible, not bottomed out) materials all round is real chancy.  Heroically deep trenches cut around vibrating machinery sadly often provide no signicant reduction in transmitted vibration

RE: Vibration Damping Compound

Hello ADAG,

We use Chockfast Orange as a filler material.
You can get Chockfast in several different types
It's a product from:  ITW Philadelphia Resins

Look at
www.chockfast.com

Choose your type

Harry

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