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inflating and deflating a air bladder continuously? Answered

I am interested in a project however what i need to do is to inflate and deflate a air bladder repeatedly on a continuous cycle (so inflation and the deflation). This making me think of a piston style pump hooked up to a motor which I can control through use of a variable resistor. Is there any piston style pump i can use or is there a alternative which would be better. (I do have a budget of around 70usd)


3 Replies

steveastrouk (author)2012-06-12

What volume of air ? What pressure ? How fast ?

You don't control motor speed with variable resistors, if you want acceptable performance. .

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mute86 (author)steveastrouk2012-06-13

volume of the bladder will be 561.5325319999995 (it is a cylinder type shape that has a radius approximately 2.08 cm and a height of 17.8 cm) may make it smaller. The pressure I do not care about a slong as it can fill the space in say 1or2 second and I would like to vary the speed.

Thanks for your reply

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steveastrouk (author)mute862012-06-13

In that case, look at peristaltic pumps, reversing them makes them suck, controlling the speed changes the volume flow rate.

THere are a bunch of cheap ones in Ebay.

Incidentally, quoting the approximate volume to one part in 10^15 isn't helpful.....

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