Roots blower in vacuum technology

[damir2go]

hello everyone!

I'm a student of refrigeration technology at a university and i think this forum is great I'm sniffing around for some time now and i'm glad i found this site :)

anyway, enough with the ass-kissing, i need some help! I have to do a paper on Roots blower in vacuum technology and i cant find any helpful literature on-line! Do you have any advice where to look?
that's all for starters, thx for you're help!

[DTLarca]

hello everyone!

I'm a student of refrigeration technology at a university and i think this forum is great I'm sniffing around for some time now and i'm glad i found this site :)

anyway, enough with the ass-kissing, i need some help! I have to do a paper on Roots blower in vacuum technology and i cant find any helpful literature on-line! Do you have any advice where to look?
that's all for starters, thx for you're help!

Invented by the Roots brothers of America in 1854. Originally for pumping liquids but in the end used for pumping gas. Was very popular in the UK for pumping gas around cities and on the mines for high volume ventilation creating good pressures.

Contact Peter O'Neill, if he is still around - he used to be the Technical Director of Howden in Scotland.

[Brian_UK]

Maybe you have restrictions on your search ability where you are, I found this as my fourth choice....

http://www.idealvac.com/files/brochures/Oerlikon_Leybold_Roots_Blower_Vacuum_Pump_Catalog.pdf

[damir2go]

thnx for the replies, i don't think i have any restrictions, i guess i was looking in the wrong place. the pdf is great, but i was hoping for some more detailed stuff.

couldn't find mr. O'Neill, maybe you could pm me his e-mail?

[monkey spanners]

thnx for the replies, i don't think i have any restrictions, i guess i was looking in the wrong place. the pdf is great, but i was hoping for some more detailed stuff.

couldn't find mr. O'Neill, maybe you could pm me his e-mail?

Hi,

I think DT was on about these people,

http://www.howden.com/en/Businesses/HowdenUK/

Jon :)

[Peter_1]

Is his big enough http://www.refrigeration-engineer.com/forums/showthread.php?t=5203 second post
These are Leybold machines. We're speaking about vacuuming but what they do is something far beyond what we understand as vacuuming.
I also posted somewhere a small movie of a bottle with water we placed behind the window of this vacuum-chamber.

[Peter_1]

We serviced 2 weeks ago a Polycold autocascade and there they installed several turbomolecular pumps on a vacuum-chamber. http://en.wikipedia.org/wiki/Turbomolecular_pump
+/- 12 to 14 pieces, costing each more than 25,000 Euro
Speed, +/-50,000 to 100,00 RPM, just like a jet on an airplane. It takes minutes before they run at full speed. Amazing piece of technology

[damir2go]

i was going through your posts and i can't find the video :( is there a way to browse just pictures or videos on the forum? Anyway, i guess that white machines on the pictures are roots blowers? Why on earth are there so many of them? :)
I read some about turbomolecular pumps but never saw one in action. So i guess that's a very big vacuum chamber (if it has 12 pumps). What do they use it for?

thnx for the link Jon ;)

[Peter_1]

Chamber of +/- 2 m diameters and 1.5 to 2 m long.
It's used for metal coating, the blinking you see on an unfolded capacitor or the blinking of the plastic wrapping of pralines.