Re: Takeup Location
Placing the takup after the drive is correct. You did not make your actual location and pulley arrangements known. By your layout I recommend you rethink the pulley happy arrangement.
You did not specifiy the product which is important, especially if you consider material sticking to belt.
ALthough, this appear to look like a conventional system, it is not a well engineered system. It may give grief with reference to the above sticky material:
1. two dirty-side belt contacts with high tension pulleys - axiom: eliminate, at great cost, most dirty side contacts
2. upper pulley sheds material buidup onto lower pulley
3. high tension pulley material buildup will cause drive load sharing vibration and instability
4. carryback rock and water flows into secondary pulley
5. too many pulleys reducing conveyor reliability
6. four dirty side contact pulleys is too many
7. some actual dimensions would eliminate babble and provide useful comment
Lawrence Nordell
www.conveyor-dynamics.com ■
Re: Takeup Location
Point 4 abv refers to secondary drive pulley.
Actual dimensions may show that you may have dynamic problems.
LKN ■
Re: Takeup Location
Thanks for the quick response Mr. Nordell,
Actual locations of the pulleys are currently not known, this is still at conceptual stage.
However, some basic requirements are:
1. The head discharge pulley will about 20m above ground level to discharge into a 1000T bin.
2. Drive and takeup location would be preferred near the ground for easier access. What other ways besides using bend pulleys could we achieve this? Would be able to show me a sketch?
3. Material carried: Iron Ore @4000 tph, 1050mm beltwidth.
4. This is a curved overland conveyor (2500m radius), with 2 drive location, one near the head end and one at the tail. I would think that we need a tail drive to help reduce belt tensions, hence reducing required idler superelevation in the curved section. (VVVF drive would probably be installed)
Thanks for your help again, let me know if you require any other details.
Regards
MC ■
Re: Takeup Location
Hi Mr. Nordell,
I forgot to mention that the position of the drive/bends/takeup pulleys will be about 80m away from discharge head pulley.
Will this make a difference in the effects of carry back material, etc.
Regards
MC ■
Re: Takeup Location
Now we are getting into design finess. Since I do not know the geometric details and potential for dynamic problems that may interact with the horizontal curve design, I cannot render an engineering opinion.
Provide the proposed design.
LK Nordell ■
Re: Takeup Location
Fair enough Mr. Nordell,
I will keep you posted as we progress.
At the moment we only have earthwork drawings which shows the conveyor line following the terrain.
I can email them in PDF format.
Do you have a email address I can send to.
Regards
MC ■
Re: Takeup Location
Mannycbl,
My email address is: nordell@conveyor-dynamics.com
Lawrence Nordell
www.conveyor-dynamics.com ■
Re: Takeup Location
The gravity take-up location is an important design issue. This is selected in consideration of the following points:
1) The location is to be chosen such that maximum tension in belt is the least, so that conveyor becomes economical. The designer often makes three to four design trials to see where it is beneficial.
2) The gravity-take-up should be reasonably close to drive pulleys so that it is responsive to the drive.
3) It should be reasonably away from the point of maximum tension where the belt failure is likely to occur. The belt length between point of failure and the take-up helps to reduce the impact of take-up mass.
4) Layout constrain / considerations.
In case of routine conveyors, there are usual norms / beliefs in consideration of above points but in proper design, it is analysed in totality.
In case of winch take-up of fixed belt length during operation, its location does not affect the performance of conveyor.
One may arbitrarily choose the location of take-up, and the conveyor can be certainly designed to suit the decision, but it may not meet with the said considerations i.e. not the optimum techno-commercial design.
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 ■
Takeup Location
Hi,
A quick question about takeup locations.
Im looking at an overland conveyor about 6km long that discharges to a 1000T bin which means it lifts up by about 10m.
I would prefer the drive location to be on the ground for easy access, is there a problem with placing the takeup right after the drive pulley.
This takeup pulley would be on rails connected to a takeup tower.
I've attached a rough profile in description
Thanks
MC
Attachments
conveyor profile (JPG)
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