Hello!
Most of us know how to lubricate the engines with two types of « greaser/oiler » ;
One is a ratchet type with definite volume of oil delivered and the other one on he classical condensate one. This one is sometime not easy to set properly for a good lubrication. Or it gets empty too fast or it does not deliver oil. Most of the time though , it does the job , more or less ! As long as the oiler is not bigger than the engine as I saw some !.
For my part, I sometime work with HP steam (not flash steam) and , as we all know, the higher the pressure is the higher the temps is. I over heat too. And come a point where the condensate greaser has no efficiency.
Lazy like a lizard in the sun, I did not want to machine down a ratchet greaser so I thought of another method.
Easy to build and easy to control. It’s incredible how I get more ideas coming up when I am sipping a Pastis on a rocking chair in my garden . Try it, you’ll see ! Maybe you need 2 or 3 but it works !;-))
The scheme below shows the principle. A big cylinder with a large piston , pushing a small piston in a narrow cylinder.
The big cylinder is connected up stream on the steam line and the small cylinder downstream.
The surface of the big piston is the double of the small one.
Obviously the steam pressure on the line is the same up & down stream. But if I open a needle valve up stream on the big piston, the pressure will be twice more than on the small one and will push it , displacing the oil in the line down stream !
As this is a glass through which , we can check the displacement, we can adjust the flow with the needle valve and see what we are doing.
The only problem I have (but it is solved) , it is to get the pistons back in initial position and the oiler full. To do so I install a Tee down stream. A plug on the side and a globe valve in the line. I take the plug off and close the valve. I fill a syringe up with oil and I squeeze the oil through the plug.
Cheap & easy !
Let me know what you think and if we can improve it.
I know that my explanations are fastidious , but I am confident that people of your calibre will get the scoop.
Thaks for your attention .
Regards.