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Re: Belt Pull-Motorized Pulley

Erstellt am 25. Jan. 2011 - 09:38

The term "belt pull" is used to define the tension in a conveyor belt at any particular position around its length. In relation to a driving pulley there are two belt pulls, the belt pull as the belt contacts the driving pulley, and the belt pull as the belt leaves the driving pulley. ■

Marcsua
(not verified)

Re: Belt Pull-Motorized Pulley

Erstellt am 26. Jan. 2011 - 05:31

Thanks Mr. Brown,

And Mr Designer,

As say Mr Brown:

Belt Pull = Efective Tension (Te) ?

Best regards,

Marcsua ■

Re: Belt Pull-Motorized Pulley

Erstellt am 26. Jan. 2011 - 05:45

Just remember on a driving pulley the "effective tension" is not the maximum belt tension. ■

Marcsua
(not verified)

Re: Belt Pull-Motorized Pulley

Erstellt am 29. Jan. 2011 - 06:06

I researched more about this issue, and i found that:

According "Goodyear Conveyor Handbook":

The efective tension (Te) is equal to the diference between T1 (tight side tension) and T2 (slack side tension).

Indeed, as say Mr. Designer, the efective tension (Te) is not the maximun tension in the conveyor belt.

and is this source: http://www.forbo-siegling.com/pages/...lts304en.pdf,

I found that Belt Pull = Te x C1, where C1 is the factor of adherence between Drive Pulley and Conveyor Belt.

C1 depends of the state of the lagging of the pulley and the contact arc between pulley and conveyor belt.

I could conclude that the term "Belt Pull" (In Motorized Pulley) refers to the force that offers this element in its periphery.

For calculate de "Belt Pull", must be taken in account:

1- The force neccesary to move empty conveyor belt

2- The force neccesary to move the Charge along of conveyor

3- The force neccesary to lift the Charge (If the conveyor is inclined)

I appreciate your comments,

Best regards,

Marcsua ■

Re: Belt Pull-Motorized Pulley

Erstellt am 5. Feb. 2011 - 12:47

Hello Marcusa,

To me it appears that “belt pull” is general term and it is not used to describe “technically specific” belt tension. Technically specific tension, as are being used in belt conveyor technology are say :

“Tractive pull” nomenclature P or Te implies tension difference at drive pulley.

Tension T1 which is belt tension at head pulley, for belt approaching the head pulley.

Tension T2 which is belt tension at head pulley, for belt leaving the head pulley.

Often T1 and T2 are referred in context of drive pulley, but drive pulley can be anywhere on conveyor, and such use will create confusing numbering.

Use of tensions T1, T2, T3, T4 in conjunction with head pulley and tail pulley only; makes the naming easy and is found to be convenient.

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.

Pune, India.

Tel.: 0091 (0)20 25871916

Email: parimul@pn2.vsnl.net.in ■