Air Pump!

[fishboy1232]

does any one know how to make
an air pump?

 

[raptorrex]

I believe Terratec and rena know a bit .

diaphragm, piston, crank and motor.
why? making an effective air pump, for less than you can buy one, would be very difficult. unless you are an engineer, with access to the tools needed.

 

[fishboy1232]

ok

ok

 

[InaneCathode]

Nooooo, it'd be fun to try!

They made pumps in the middle ages, i dont see why you couldnt fashion one out of wood and leather, plastic, rubber, foam, anything. All you need is a chamber that changes displacement, and two valves to control air flow. Power could be supplied from any number of small electric motors with a simple cam put on the output shaft.

 

[raptorrex]

Nooooo, it'd be fun to try!

They made pumps in the middle ages, i dont see why you couldnt fashion one out of wood and leather, plastic, rubber, foam, anything. All you need is a chamber that changes displacement, and two valves to control air flow. Power could be supplied from any number of small electric motors with a simple cam put on the output shaft.

can you imagine how difficult it would be to balance a wooden crank to run at the speed needed? indeed it would be quite a job in metal. it may be a fun project but not practical, for use.

 

[fishboy1232]

ok, thanks

 

[iqofone]

Well What if you used the motor as a blower rather than a pump? I guess it would come down to how much air you wanted, and how far down it was to go? (still just an idea)

 

[InaneCathode]

Nooooo, it'd be fun to try!

They made pumps in the middle ages, i dont see why you couldnt fashion one out of wood and leather, plastic, rubber, foam, anything. All you need is a chamber that changes displacement, and two valves to control air flow. Power could be supplied from any number of small electric motors with a simple cam put on the output shaft.

can you imagine how difficult it would be to balance a wooden crank to run at the speed needed? indeed it would be quite a job in metal. it may be a fun project but not practical, for use.

It'd be plenty practical. You could easily substitute pumping volume for pumping speed. The little electrics most of us use today displace tiny amounts of air but run at high speeds. You could have two cylinders that displace, say, 250ccs each, and run it at snails pace and easily out pump one of the electric jobs by several times.

Well What if you used the motor as a blower rather than a pump? I guess it would come down to how much air you wanted, and how far down it was to go? (still just an idea)

Because of the pressures involved with forcing air into deep water a blower wouldnt work (unless it was enourmous). Blowers move alot of air, but at low pressure. The way most air pumps overcome this pressure with their puny electric motors is by moving tiny amounts of air under high pressure.

 

[fishboy1232]

thanks

 

[InaneCathode]

I'd give someone a million dollars if they could make a large displacement slow rpm aquarium pump. It'd be so quiet, and could move so much air it'd be great for large tanks!

 

[iqofone]

I wasn't thinking of a small puny motor... something like a mains motor, with a series of screw type of props like a Hamilton Jet engine, or what about a something like a modified roots pump? I guess what I'm trying to say is there is more than 1 type of pump, and a defferent type may be more suitable.

 

[InaneCathode]

Roots would work alright if you needed a tonne of air, but i dont think you'd really need something that powerful. Just a simple cam operated dual bellows system would work a treat.