Pressurized box
Pressurized box
(OP)
Hi, I am a Mechanical engineer and I´m developing a pressurized box (600x500x200 mm^3) that will contain electronics. The problem is that I have to keep a pressure of 1 atm in the inner, while in the outer I have almost 0 atm. I woul like to know if it is a good idea to develop the box as a rectangular prism (no cilindrical or spherical shapes, but flat rectangular plates). Another question is the kind of material, becouse of weight is a mandatory question in the project, I´m thinking in al 6082 or al 7075.
For manufacturing I´m thinking in empty a block of aluminum then I will have a box and a cover. I would like to know the way to join the box to the cover (screws, seal, thickness..).
If someone know something about these topics, anything will help me.
thanks in advance,
Pedro.
For manufacturing I´m thinking in empty a block of aluminum then I will have a box and a cover. I would like to know the way to join the box to the cover (screws, seal, thickness..).
If someone know something about these topics, anything will help me.
thanks in advance,
Pedro.





RE: Pressurized box
If weight is definitely of major concern (going to space?) you should first of all choose the most effective material for minimizing weight: I'm not particularly expert with this, but guess that besides cold stretched aluminum also titanium might be of interest.
Concerning the shape a sphere or two ellipsoidal heads should be chosen, depending on your internal and external size requirements.
The opening will impact very much on mass: also here you should decide the required size. If you need a full size opening, the two heads above would be joined with a full diameter flange, but this will likely weigh more than the rest of the container.
prex
http://www.xcalcs.com
Online tools for structural design
RE: Pressurized box
It´s not for space, but near. It will fly at 40 km height. My next problem is the temperature differences and the different thermic expansion coefficient of aluminium hull and steel of titanium screws.
Thank you again,
Pedrox
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www.asme.org
sorry, these codes are not free. perhaps your firm has these codes. at least , i would think so.
good luck!
-pmover
RE: Pressurized box
Regards,
Eng-Tips.com : Solving your problems before you get them.
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pedrodmar@ono.es
thanks for your help.
RE: Pressurized box
Eng-Tips.com : Solving your problems before you get them.
RE: Pressurized box
Can I have a copy of this spreadsheet. Please email to hockchong.lee@akerkvaerner.com
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pedro.rodriguez@uv.es
thankyou.
RE: Pressurized box
Please send me a copy of the spreadsheet also. Send to info@rowald.com
Thanks
RE: Pressurized box
Could you also send me a copy of the rectangular tank design document.
Send to: alarson2@houston.rr.com
Thanks.