Results 1 to 9 of 9

Thread: Conveyor Pulleys

  1. Posted by K.R. Baskar on May 13, 1999 at 22:12:46:

    What is the right method to select the thickness of the Pulley shell for conveyor pulleys?

    Is there any norms for fixing the distance between the end-discs and the edge of the shell?



  2. #2
    Axel Witt Guest

    Re: Conveyor Pulleys

    Posted by Axel Witt on November 04, 2000 at 13:19:56:

    In Reply to: Conveyor Pulleys posted by K.R. Baskar on May 13, 1999 at 22:12:46:

    If you have a special problem or question please send us your load and, if available, pulley data such as diameter, bearing center distance and belt tensions etc.
    We will answer as soon as possible!
    Regards
    Axel Witt



  3. #3
    Lawrence K. Nordell

    Lawrence K. Nordell

    President and CEO

    Conveyor Dynamics Inc. [eDir]

    Conveyor Dynamics Inc.

    Professional Experience 57 Years / 11 Month Lawrence K. Nordell has 57 Years and 11 Month professional experience

    Discussions 2608 Lawrence K. Nordell acceded to 2608 discussions, Articles 0 Lawrence K. Nordell wrote 0 articles, Publications 0 Lawrence K. Nordell Nordell released 0 publications

    Searching nothing specified

    Know-How Design (1521) Lawrence K. Nordell used this tag 1521 times, Pipe Conveyor (238) Lawrence K. Nordell used this tag 238 times, Chutes (119) Lawrence K. Nordell used this tag 119 times

    Re: Conveyor Pulleys

    Posted by L. Nordell on May 18, 1999 at 22:01:31:

    In Reply to: Conveyor Pulleys posted by K.R. Baskar on May 13, 1999 at 22:12:46:

    continuation: please find the two Conveyor Dynamics, Inc. (CDI) references on pulley design.
    1. Modern Pulley Design Techniques and Failure Analysis Methods - by Vinit Sethi and Lawrence Nordell SME 1993 Symposium Conveyor Belt Eng..C14
    2. A New Pulley Stress Analysis Method... by Xiangjun Qiu and Vinit Sethi
    Contact us for support if needed.




  4. #4
    Lawrence K. Nordell

    Lawrence K. Nordell

    President and CEO

    Conveyor Dynamics Inc. [eDir]

    Conveyor Dynamics Inc.

    Professional Experience 57 Years / 11 Month Lawrence K. Nordell has 57 Years and 11 Month professional experience

    Discussions 2608 Lawrence K. Nordell acceded to 2608 discussions, Articles 0 Lawrence K. Nordell wrote 0 articles, Publications 0 Lawrence K. Nordell Nordell released 0 publications

    Searching nothing specified

    Know-How Design (1521) Lawrence K. Nordell used this tag 1521 times, Pipe Conveyor (238) Lawrence K. Nordell used this tag 238 times, Chutes (119) Lawrence K. Nordell used this tag 119 times

    Re: Design of Conveyor Pulleys

    Posted by Lawrence Nordell on May 15, 1999 at 15:51:29:

    In Reply to: Conveyor Pulleys posted by K.R. Baskar on May 13, 1999 at 22:12:46:

    Dear Sir:
    You requested: How to select the pulley shell thickness and the end relief distance between shell edge and end disk? Shell analysis can be very conservatively estimated by assuming the shell is a arch with a 20 degree included angle pinned at one end and horizontally free at the other with a uniform load (Roark, Omar Blodgett et al), mod. for wear, belt alignment, crown, no internal stiffner rings, wrap angle, steel belt. Proper complex analysis is $$$ better. 2nd Q none.



  5. Dear Shri K R Baskar,

    Pulley shell, end discs, hubs, their connection to shaft and shaft, acts as a composite body. There are design methods to decide size of these items. This cannot be described on the forum.

    Some of the methods are as per Lange Germany, TJ King South Africa, D A Hills & S Baugh England, etc. as per their research / articles.

    Regards,
    Ishwar G Mulani.
    Author of Book : Engineering Science and Application Design for Belt Conveyors.
    Advisor / Consultant for Bulk Material Handling System & Issues.
    Email : parimul@pn2.vsnl.net.in
    Tel.: 0091 (0)20 25882916

  6. KR,

    Assuming small conveyors,

    Shell width is typ. 150mm more than belt width..eg MEHA etal.
    Other have advised on shell design methods.
    End disc is typ. designed to Roak's - assume no contribution from shaft in stiffeness.
    End disc design can vary, turbine type etc etc.
    End disc is typ. 50mm or less from end of shell - to suit welding machine.
    Shaft design is for infinite life, assuming shaft locking devices at end discs, the shaft size is set by both fatigue and deflection limits.

    Unless U plan to do a lot of pulley design, suggest that U ask suppliers to provide either off the shelf pulleys or custion design to suit your loads/applications.

    Otherwise, U will need to do some more research etc. on pulley design methods.

    Cheers


    James

  7. Referring to the reply by Mr. James Morrish, I provide the following information for the general benefit of the readers :
    1) For usual pulleys, there are routinely used standard dimensions such as bearing center distance = belt width + dimension x.
    End disc distance from pulley edge = y dimension etc.
    2) Basic guidelines to fix all these dimensions are related to actual accommodation of various components of the pulley, such as
    - End disc should be positioned as near to the pulley edge as possible so that the bending arm for the shaft is minimum. But in doing so, it should be sufficiently away from pulley edge, so that hub projection, its key / locking rim can be removed without obstruction from plummer block. Also, it should allow tapering distance for steps in shaft diameter.
    - Although there are certain norms as mentioned in serial no. 1, but it is the requirement of physical accommodation / positioning for appropriate engineering result, is governing the matter. Other issues are of secondary importance.
    - The bearing center distance shall be such that the bearing alongwith the supporting member allows positioning of chute wall between bearing and pulley, with appropriate clearance.

    Regards,
    Ishwar G Mulani.
    Author of Book : Engineering Science and Application Design for Belt Conveyors.
    Advisor / Consultant for Bulk Material Handling System & Issues.
    Email : parimul@pn2.vsnl.net.in
    Tel.: 0091 (0)20 25882916

  8. I believe that the "Prok" Australian website has an excel file for pulley sizing - now owned by Sandvik.

    May help the initiator.

    Thanks


    James

  9. Conveyor Pulley

    Dear Mr. Baskar
    Pulley shell thickness mainly depands upon :
    -Belt tension
    -Bearing center of pulley
    In many design book, you will find some relation to find out the same.I have seen many articles in BULK SOLID journal.
    Regards.
    A.Banerjee

Similar Threads

  1. Replies: 10
    Last Post: 20th April 2005, 14:59
  2. Crowned pulleys in transitions
    By Shane in forum Trough Belt Conveying
    Replies: 0
    Last Post: 28th June 2003, 4:10
  3. Handling of Take up/ Bend Pulleys
    By vishy in forum Trough Belt Conveying
    Replies: 11
    Last Post: 10th January 2003, 3:11
  4. Failed Pulleys
    By winlong in forum Trough Belt Conveying
    Replies: 0
    Last Post: 8th January 2003, 20:33
  5. Shaftless conveyor pulleys
    By paul attiwell in forum Trough Belt Conveying
    Replies: 7
    Last Post: 7th June 2002, 17:41

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO