Undercarriage support structure

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It is through the undercarriage the load (of the machine) is distributed to the wheel bogies and to the civil foundation through rails.




Undercarriage support structure is designed to transmit the forces to the tracks (through 3 points or 4 points). A 3-point structure may be designed as a 3/3 system or a 3/4 system, whereas a 4-point structure is always designed as 4/4 system.


3/3 & 3/4 support undercarriage:
The undercarriage support structure shall designed as a 3/3 support or a 3/4 support based on the system requirement.
  • If the conveyor is offset with the machine axis (or in some cases if there are 2 conveyors between the rails) then the machine shall be provided with 3/3 support undercarriage.
  • If the conveyor is in line with the machine axis then the machine shall be provided with 3/4 support under carriage.

 



4/4 support undercarriage:
If the conveyor is in line with the machine axis then 4/4 support undercarriage may also recommended (4/4 support under carriage is GENERALLY not used).



NOTE: FOR YOUR REFERENCE I HAVE ATTACHED THE PHOTOGRAPH OF 4/4 SUPPORT UNDERCARRIAGE ALSO. PLEASE LEAVE YOUR CONTACT DETAIL IN THIS PAGE COMMENTS AREA IF YOU WANT TO DISCUSS ABOUT 4/4 SUPPORT IN DETAIL.
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Comments

  1. Unknown24 February 2018 at 01:48

    Hi sir , from the stability point of view which type of support ( 3/3 , 3/4, 4/4) is preferred.
    Whether the type of foundation determines the type of support?

    ReplyDelete
    Replies
    1. Basics in Stacker Reclaimer26 February 2018 at 16:29

      Dear Friend,
      Stability is determined by not only the type of support, but also by boom balancing and rail gauge (distance between two rails).
      Regarding the type of foundation, with reference to the book 'Stacking Blending Reclaiming of Bulk Materials edited by R. H. Wohlbier', for a 3/3 support, the rails can be laid on wooden or reinforced concrete sleepers (low cost) and for a 4/4 support, the recommended foundation for a 4/4 support is continuous concrete foundations (high cost).
      However, I have seen machines with 3/3 support in continuous concrete foundations also. Since from a Civil design engineers point of view, the type of soil and the load bearing capacity of the soil decides the type of foundation to be used in a particular site.

      Delete
  2. Unknown19 March 2021 at 08:47

    Dear Sir,

    For balancing of the machine why do we try to keep the CG shift within the Rail CRS. Also cannot understand the concept of stabilising and destabilizing moment during balancing. I would highly appreciate a detailed explanation.
    And keep posting new blogs. These are really helpful ..Cheers!!!!

    ReplyDelete

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