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Turbomolecular Vacuum Pump And now for something completely different: The Larch... (Monty Pythons) Well, the following hasn’t too much to do with gas turbines, though it might look somewhat familiar. I included this here because some people of course will be curious what such a thing looks like inside. It is a turbomolecular high-vacuum pump that I had to strip down to check the bearings as it revealed problems spinning up. This pump requires a fore-vacuum of approx. 1mbar to operate. It spins at 72krpm and at that speed and the low pressure the gas cannot be considered as a “continous” medium but the molecules themselves contribute to the pumping effect. They can be considered to be “kicked” by the high-speed rotating vanes from the high-vacuum side to the forevacuum. This pump will generate a vacuum of about 10-12bar when operating properly, which would be fine for electron tubes or electron microscopy. And here are the pictures:
Now I’ll have to figure out where to get the appropriate bearings (special vacuum hybrid ball bearings, probably incredibly expensive). Then I’ll find out if disassenbly of this pump was a good idea.
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