Re: Belt Lenght
Originally posted by mahmud
Hi to all
I have some questions about belt lenght that we must buy.
How is calculation of belt lenght that we need when there is a gravity take up with a course?
where is position of gravity when we are calculating belt lenght?
and what are other parameter and effects on belt lenght calculation that we need for a specific
belt conveyor geometry?
what is effect of splicing on supply of total belt lenght?
thanks
regards
Generally speaking:
Tail to Head x 2 +
Top Bend Pulley to Lower GTU Pulley x 2 +
(depending on type of belt and length so far) on say a 100mtr section of conveyor structure and a 5mtr drop GTU you would still need 2m to splice the belt.
You could give yourself about half of the GTU drop to allow for stretch(5m intoal not 10m) if you were to buy the minimum belt length.
Better to have a few metrers over(can be used late fro an insert) than to be too short first up, or you will have 2 joints in a belt rather than only the 1. ■
Re: Belt Lenght
Dear Mr. Mahmud,
The belt conveyor length calculation for general situation is as below :
- Find out the length along conveying route. Simplistically, suppose you have a conveyor of 100 m horizontal centre to centre distance and if it 10 degree inclines from tail to head, then the conveyor length centre to centre along conveying route will be horizontal distance divided by cosine of angle.
- The belt basic length would be two times the length along route as calculated above.
- If you have a simple snub drive then add for pulley wrap length at terminals equal to 2 x PI x diameter of drive pulley. If it is dual pulley drive at head end then further add the length of belt from primary drive pulley to wrap around secondary drive pulley etc.
- The additional length for the tale-up will depend upon the type of take-up. For vertical gravity take-up, the take-up pulley position can be considered near its upper limit. Add for the length of belt from return run to the location of this pulley and wrap around take-up pulley. For average conveyor, take-up pulley could be at a distance of about 1.7 m below return run. If it is a horizontal loop gravity take-up at intermediate location then add for the belt route in the take-up zone, from return run to return run.
- Add for all the aforesaid calculated lengths. In general you can consider one vulcanised joint at say every 200 m or so. Add for the belt overlap at each of the joint. The summation of the main calculated length + length needed for vulcanised joints + belt length measurement tolerance or conveyor length measurement tolerance or temperature difference in the country of dispatch and the country of receipt, could be accounted by addition of approximately 1% or 2% depending upon the situation.
You may be calculating belt length mainly for ordering, so in this case it is better to account for somewhat more length depending upon the wasted belt length due to some fault during vulcanizing joints (i.e. out of some ten joint, contingency for one additional joint, etc.)
The aforesaid description is for average situation and for general guidance. For specialised situations the applicable conditions to be given thought.
Regards,
Ishwar G Mulani.
Author of Book : Engineering Science and Application Design for Belt Conveyors.
Author of Book : Belt Feeder Design and Hopper Bin Silo
Advisor / Consultant for Bulk Material Handling System & Issues.
Email : parimul@pn2.vsnl.net.in
Tel.: 0091 (0)20 25882916 ■
Belt lenght
Hi to all
I have some questions about belt lenght .
How is calculation of belt lenght that we need when there is a gravity take up with a course?
where is position of gravity pulley(up,down or middle) when we are calculating belt lenght?
and what are other parameter and effects on belt lenght calculation that we need for a specific
belt conveyor geometry?
what is effect of splicing on supply of total belt lenght?
thanks
regards ■