How to improve your mechanical vacuum pump

Every fusor and fusion system seems to need a vacuum. This area is for detailed discussion of vacuum systems, materials, gauging, etc. related to fusor or fusion research.
Post Reply
HEAVY WATER
Posts: 6
Joined: Sun Nov 02, 2014 1:09 am
Real name: 彭译锋(peng yi feng)
Location: CHINA

How to improve your mechanical vacuum pump

Post by HEAVY WATER » Tue Nov 04, 2014 12:14 pm

If you have a small mechanical vacuum pump.How can you improve it?
You only need a electric drill and it is very easy to get the high vacuum.LOOK AT THE PHOTOS!
FILE7944.JPG
A 150W mechanical vacuum pump
FILE7947.JPG
Open it
FILE7952.JPG
Link it like the photo
FILE7950.JPG
the higher vacuum
Isn't enough?You can put more vacuum pump oil in it vacuum pump and use the bigger electric drill.
FILE7953.JPG
put more vacuum pump oil in it
FILE7954.JPG
use the bigger electric drill

User avatar
Andrew Robinson
Moderator
Posts: 689
Joined: Sun Aug 11, 2013 5:54 am
Real name: Andrew Robinson
Location: Raleigh, North Carolina
Contact:

Re: How to improve your mechanical vacuum pump

Post by Andrew Robinson » Tue Nov 04, 2014 4:23 pm

I'll wait for one of Richards classic comments here :)
I can wire anything directly into anything! I'm the professor!

User avatar
Richard Hull
Moderator
Posts: 12743
Joined: Fri Jun 15, 2001 1:44 pm
Real name: Richard Hull

Re: How to improve your mechanical vacuum pump

Post by Richard Hull » Wed Nov 05, 2014 4:51 am

No witty comments needed. What is needed is a good high vacuum TC gauge, of course.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

Doug Browning
Posts: 156
Joined: Sun Mar 11, 2012 2:19 am
Real name: Doug Browning

Re: How to improve your mechanical vacuum pump

Post by Doug Browning » Wed Nov 05, 2014 6:23 am

MacGyvering tech:

Five vacuum cleaners in series should work too (reportedly each can do 20 % of 1 ATM). So put those on the outlet of the vane pump to get a 2 stage pump. Then put 283 stacked Muffin fans on the pump inlet side to fill in for the turbo.

(Pfeiffer TPU 050 runs at 90,000 RPM and has 11 rotors and 11 stators. 2 pole/60 Hz Muffin fan runs at 3500 RPM. So, 90,000/3500 * 11 => 283 ; needs CW and CCW fans alternated. )

Looks like the usual turbo might be cheaper. A lot of odd O rings needed for all those Muffin fans too. Maybe could glue them together. For throttled Fusor use, could probably get away with a factor of 10 or 20 less compression ratio though. Then only 14 computer fans (magnetic bearing type) at maybe $2 each off Epay China. Could just stuff them into a foot long 3" diameter ISO 80 pipe with some conductance limiting packing around them.
Last edited by Doug Browning on Wed Nov 05, 2014 8:30 pm, edited 3 times in total.

HEAVY WATER
Posts: 6
Joined: Sun Nov 02, 2014 1:09 am
Real name: 彭译锋(peng yi feng)
Location: CHINA

Re: How to improve your mechanical vacuum pump

Post by HEAVY WATER » Wed Nov 05, 2014 10:10 am

Richard Hull wrote:No witty comments needed. What is needed is a good high vacuum TC gauge, of course.

Richard Hull
I don't have a a good high vacuum TC gauge.I think that I must buy one now.

User avatar
Chris Bradley
Posts: 2930
Joined: Fri May 02, 2008 11:05 am
Real name:

Re: How to improve your mechanical vacuum pump

Post by Chris Bradley » Wed Nov 05, 2014 7:10 pm

HEAVY WATER wrote:If you have a small mechanical vacuum pump.How can you improve it?
Sell it and use the money to help replace it with something bigger?

HEAVY WATER
Posts: 6
Joined: Sun Nov 02, 2014 1:09 am
Real name: 彭译锋(peng yi feng)
Location: CHINA

Re: How to improve your mechanical vacuum pump

Post by HEAVY WATER » Thu Nov 06, 2014 4:48 am

Chris Bradley wrote:
HEAVY WATER wrote:If you have a small mechanical vacuum pump.How can you improve it?
Sell it and use the money to help replace it with something bigger?
But I don't know where can I buy the diffusion pump with a cheap price

User avatar
Andrew Robinson
Moderator
Posts: 689
Joined: Sun Aug 11, 2013 5:54 am
Real name: Andrew Robinson
Location: Raleigh, North Carolina
Contact:

Re: How to improve your mechanical vacuum pump

Post by Andrew Robinson » Thu Nov 06, 2014 5:40 am

Peng yi feng,

I think you need to do some more reading first. Spend some time in the FAQs.
I can wire anything directly into anything! I'm the professor!

Post Reply