×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

ratio gearbox and kw motor

ratio gearbox and kw motor

ratio gearbox and kw motor

(OP)
guys.. need your advise
We need to changes existing 7.5kw motor mixing.
How many kw gearbox motor and what gearbox ratio is needed if it is to be used for mixing sugar powder so that it is homogeneous with a capacity of 1200 kg?

regards,
charles

RE: ratio gearbox and kw motor

charls1,

You have provided us nowhere near enough information to answer that question.

If your present motor worked, you need a new one just like it. Failing that, you need to get a mechanical engineer on your site.

--
JHG

RE: ratio gearbox and kw motor

My field is fluid mixers, but I suspect solid powder mixers are similar - don't bolt a bigger motor or gearbox on the assembly unless you don't mind creating a failure somewhere else. Mixing equipment is typically sized for a mechanical load and if you increase those loads, everything could fail including its mounting / support structure. That gets very dangerous.

It sounds like you appreciate a fresh approach to sizing to reach a given process outcome. If you're limited to equipment you have on-hand, or want to try your luck with used machinery, give it a go. If you want a legitimate process calculation and sizing, a mixer manufacturer should be able to collect this information (and quite a bit more) to quote you a mixer that will certainly do the job.

RE: ratio gearbox and kw motor

For reference: commercially-available mixer with 500 L capacity (roughly 300 kg) requires 7.5 kW drive motor. Agitator speed is 1440 rpm. Gearbox, if any, changes motor speed to agitator speed. For this size, it would not be unusual for motor speed to be same as agitator speed (high torque squirrel cage induction motor operating on 50 Hz line frequency with approximately 4 percent slip).

Converting energy to motion for more than half a century

RE: ratio gearbox and kw motor

I'm hypothesizing that there is some sort of affinity law relationship that will apply - affinity laws

edit - see this on mixing also - no doubt there are better discussions

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! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close