Tara,
if your goal is to keep the magnet safe from excessive construction shock while it is de-energized, you can use a far simpler approach than the high-quality vibration suppression provided by the TMC legs.
The equivalent of appropriate packaging foam, or even more advanced materials like Sorbothane, could be placed between the magnet support piston of the TMC units and the leg hoods of the magnet. 1/2” thickness should be plenty. You need to ensure that the density of the foam is adequate to support the weight of the magnet spread across the piston area. The person qualified to safely de-energize and re-energize your magnet should be able to help with this temporary storage installation, one leg at a time, once the magnet is de-energized.
- Knut
> On Jan 16, 2015, at 7:39 AM, Tara Sprules <tara.sprules_at_mcgill.ca> wrote:
>
> Thanks for the comments-
>
> After writing AMMRL- which also gives fast and very useful responses, I did think to contact TMC. It turns out we have 'precision' valves on our anti-vibration legs, which constantly bleed air, and therefore require the use of in-house compressed air or a compressor.
>
> As our in-house compressed air will not be available during construction, when our magnet will be de-energised and 'stored' we were looking for other ways to keep the magnet floating while the building is demolished and rebuilt around it. Compressed air cylinders are not the answer.
>
> Tara
>
>
>
>
> On Wed, 14 Jan 2015, Tara Sprules wrote:
>
>> From: Tara Sprules <tara.sprules_at_mcgill.ca>
>> To: ammrl_at_ammrl.org
>> Subject: AMMRL: testing gas consumption/leaks on TMC anti-vibration legs
>> Hello,
>>
>> I was wondering if anyone has a method to determine how much compressed gas their TMC antivibration legs consume? I was envisaging putting some kind of splice into the airlines leading into each leg them with a flowmeter and valve to cut flow to the flowmeter when raising and lowering the magnet...
>>
>> As I understand their operation, as long as the compressed gas going into them is ca 20psi higher than the value required to keep the magnet floating, there is very little actual consumption of the gas. Assuming no leaks.
>>
>> I need to both check for leaks, and also determine how long a standard compressed nitrogen cylinder would keep the magnet up.
>>
>> Thanks for any suggestions/experience,
>>
>> Tara
>>
>> *********************************************
>> Dr. Tara Sprules
>> Quebec/Eastern Canada High Field NMR Facility
>>
>> www.nmrlab.mcgill.ca
>>
>> phone: (514) 398-1721
>> fax: (514) 398-8254
>>
>> 3420 University St., Rm 023
>> McGill University
>> Montreal, QC, H3A 2A7
>> *********************************************
>>
>>
>
> *********************************************
> Dr. Tara Sprules
> Quebec/Eastern Canada High Field NMR Facility
>
> www.nmrlab.mcgill.ca
>
> phone: (514) 398-1721
> fax: (514) 398-8254
>
> 3420 University St., Rm 023
> McGill University
> Montreal, QC, H3A 2A7
> *********************************************
>
Received on Fri Jan 16 2015 - 08:41:01 MST