×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Source for a 36,000 rpm gear box
2

Source for a 36,000 rpm gear box

Source for a 36,000 rpm gear box

(OP)
Our company will soon be testing components that will go in a jet engine. The test rig will be run at 36,000 RPM by a 40 HP electric drive. 40,000 RPM electric motors are quite expensive. Could this be done with a speed increasing gear box?  There are several possible combinations of motor speeds and gear ratios that might work. The most obvious would be a 3600 RPM motor and a 1:10 gear but even a 20,000 RPM motor and a 1:2 gear would be possible.

Does anyone know of a source for such a gear box.
Best Regards

bobfarmer

RE: Source for a 36,000 rpm gear box


Routers will do 24000 rpm but only 5hp?
http://www.worldofpower.co.uk/acatalog/Routers.html

Honda motorcycles – 20,000+  rpm engines could be  powered  from the output shaft (chain?) back to the engine - probably 40+ hp
http://www.itebooks.net/Bike/honda-concept-bike/

But what you really need is a small personal turbine like this:

87 hp @77,000 rpm
http://ibs.howstuffworks.com/ibs/la/framed.htm?parent=question411.htm&url=http://www.cbjet.clara.co.uk/lucas/lucasapu.html

RE: Source for a 36,000 rpm gear box

Interesting problem.

Driving it off some sort of turbine, perhaps the exhaust side of a suitably large diesel turbocharger? that should handle the required output Rpm and torque easily enough.

A large conventional electrically driven high pressure air blower might then supply the flow. It would be large and power inefficient, but it would be fairly straightforward and possibly the lowest cost option, especially if secondhand parts are used.

A direct drive electric motor will always be preferable, but being a "special" it will not come cheap.

Damage from accidental over-speed is always possible, a turbine would probably tolerate that better than an electric motor, and would be far cheaper to replace if it ever did "let go".

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources