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!

*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.

Jobs

Belt conveyors. Transition Distance for Head and Tail Terminals

Belt conveyors. Transition Distance for Head and Tail Terminals

(OP)
Hi all.
CEMA book gives transition distance for Head and Tail terminals - from the Pulley to the First Troughing Idler - 20, 35 etc degrees.

Question is.

Using 35 degree Idlers, Belt Width 30", in transition we using 20 degree idlers.
What is the right way to find position for 20 degree idler between Pulley and First 35 degree idler?

(Tension rate I think, in range 60-90%)

Thanks in advance,
vkcat.

RE: Belt conveyors. Transition Distance for Head and Tail Terminals

To get fully confused on this you should read more. Try this article, it is interesting, even though it doesn't answer your question.

http://www.pooleyinc.com/pdf/TechArticle.pdf

If you look at the CEMA table values and see what the transition distance is for a 20deg idler vs 35deg idler, that might be a good place for the 20deg intermediate idler in a 35deg transition.

I have often wondered why a 20deg idler is used as an intermediate idler in a 35deg transition, as opposed to using another 35deg idler which has a wider center roller that would keep a straight line from fully formed belt profile to flat profile at the pulley. I don't know how the 20deg intermediate idler came to be used.

RE: Belt conveyors. Transition Distance for Head and Tail Terminals

(OP)
[quotes]To get fully confused on this you should read more. Try this article, it is interesting, even though it doesn't answer your question[/quotes]

Thanks bigsmile
This article in my desktop now bigsmile

RE: Belt conveyors. Transition Distance for Head and Tail Terminals

This enquiry may yield more results in another "sub" forum, or another forum altogether [e.g. bulk-solids.com].

I pro rata the angle change / distance to specify its location, e.g. 35 - 0 degree / Transition Length [TL] = degrees / TL, rearranging, TL20 = degrees / TL * 20 degrees.
I also require contractor to verify the installation with stringlines etc.
You will need to confirm that the transition length that you have selected is appropriate, and so are the idler spacing [with regards to: sag / spillage, and idler loads etc].

Others have completed more applied analysis, including the following reference, that may be of interest:

Beckley, D, 1982, Belt Conveyor Transition Geometry, Bulk Solids Handling, vol.2, no. 4, pp. 727-731.

Regards,
Lyle


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


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