Trying to calculate a vane pump

[mads132]

Hello everyone.

I am trying to make a gas compressor. I had seen vane pumps and i like it.

Vane pumps are formed by an external cylinder, holding inside off-center, another rotating cylinder wich uses vanes.

I wish to calculate it for pumping R134 refrigerant in a small fridge using a low voltage motor, i need 2 cubic centimetres of displacement per revolution. I tried some online calculators and the diameters of static cylinder and the spinning one are nearly the same. My problem is that, i don't know how to choose proper sizes and have an acceptible distance between them. I wish to just use 2 vanes, so i can keep it easy to build.

Just let me thank you for your support.

 

[1503-44]

It would seem that a vane pump is not suitable for such a tiny application.
A modified syringe pump may suit your pressure and volume requirements.

 

[Artisi]

Look at peristaltic pumps,

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)