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Pressure Effects on Motors
Posted: Thu Jul 12, 2007 11:39 pm
by Atlantis
Does anybody know if a standard electric motor would keep working if it's in a pressurised atmosphere? I have an idea for a remote trigger burst disk, basically the motor would be in the chamber and puncture a burst disk.
Posted: Thu Jul 12, 2007 11:41 pm
by homedepotpro
yeah it would, it may not spin at full rpm's thought because of the increased air resistance
Posted: Fri Jul 13, 2007 12:22 am
by Modderxtrordanare
It might get damaged from all that air rushing past it as well.
Posted: Fri Jul 13, 2007 12:34 am
by Insomniac
So long as its mounted strongly, and whatever its trying to move won't get thrown around by the rapid airflow and break the motor, it should be fine.
Posted: Fri Jul 13, 2007 12:37 am
by sharpshooter
Im going to assume it will just spin something that will break some tin foil, then it will still work. unless you are working with some crazy, incredibly unsafe pressure.
if its something more complex, it still should, but i would suppose that there has to be some exception.
Motors are cheap, give it a try!!
Posted: Fri Jul 13, 2007 12:55 am
by Atlantis
Thanks for the input, I didn't think about when the air is released, if the motor casing was near airtight it might not relieve pressure fast enough and explode.
Posted: Fri Jul 13, 2007 1:23 am
by frankrede
How do you plan on mounting the motor?
Posted: Fri Jul 13, 2007 2:35 am
by Modderxtrordanare
frankrede wrote:How do you plan on mounting the motor?
Probably like people mount fans inside of their combustions.
Posted: Fri Jul 13, 2007 10:33 am
by noname
I've put a motor with a bunch of little metal "sticks" coming off of it inside a cloud BBMG to help feeding. It was supposed to hit the BBs and make them jump around more, or swat them towards the barrel. Never worked.
Posted: Fri Jul 13, 2007 1:06 pm
by FiveseveN
Why don't you make an electromagnet like the solenoids to trigger the burst disk? I mean... as long as you're working with electric power, I think a linear motor would be more efficient for linear motion, ya?
Posted: Fri Jul 13, 2007 1:22 pm
by Fnord
I would think that a motor operating in a high pressure enviroment would actually be more efficient than one in normal air. If the motor is self ventilating, the higher density air will absorb more heat than it normally would, allowing the motor to run cooler. There might be a slight rpm loss due to venting more air (weight), but it probably won't be noticable.
Like Fiveseven said, a solenoid motor consiting of a copper coil and a ferromagnetic priming rod would probably work better. You could even have the coil on the outside, assuming your chamber is plastic.
Lookup how coilguns work, it's the same idea.