Re: Belt Feeders
Dear Mr. H. Lombaard,
First you have to decide the belt speed and the material minimum cross section on belt based on material abrasiveness and lump size. The minimum cross section is the indication of the skirt board width and thereby also the belt width. Then, check the adequacy of cross section to suit capacity. If it is not adequate then choose the required higher value of cross section that would also fix the belt width. The belt width and cross section width as decided in this manner is also the width of the hopper outlet. Belt speed, cross section, capacity etc. are inter related and output of one stage calculation becomes input to the other stage and hence this decision process is not linear.
As for the hopper outlet length, it mainly depends upon the overall arrangement of hopper complex. However, one should try to keep it minimum, otherwise feeder performance will not be good with more wear of belt and more consumption of power.
The power required for the belt feeder is mainly comprising of material friction against skirt board, feeder motional resistance (like conveyor) and material shear (drag) resistance at hopper outlet.
For specific suggestion, inform the capacity, material, material size, repose angle, etc.
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 ■
Belt Feeder
Dear Mr.Wawiel,
The information what you have asked can be obtained from the following books/journal:
1. Structural bin design by GAYLORD & GAYLORD.
2. Weighing & propostioning by H.Collin
3.Bins & bunker by Reisner & Rothe
4. University of Hannover test -Table 10 Page -124
5. Bulk Solid journal Vol.-4 Page 780
Regards.
A.Banerjee ■
Belt Feeders
I need to do calculations on the hopper outlet geometry and the loads on the belt feeder. This is mainly for ballpark figures and preliminary design of new installations.
I am working through papers like:
Concepts of Feeder Design ....... AW Roberts
Design of Belt and Apron Feeders ...... JF van der Linde
Reclaim Power and Geometry ....... FJC Rademacher
Feeding of Bulk Solids ...... AW Roberts
These papers have very little consistancy with a very wide spectrum of results. What do I use?
I need data like hopper angles, vertical load on feeder, pull-out force of feeder, etc. for initial filling and flow conditions for given hopper wall friction and internal friction angles.
H. Lombaard
Hatch
hlombaard@hatch.co.za ■