Re: Chain Conveyor Drive On Non-Discharge End
Originally Posted by Deenar Apte
Yes
I think this is possible by using sprockets on both ends rather than having a plain trailing wheel on one end.
I don't recommend this. ■
Re: Chain Conveyor Drive On Non-Discharge End
Dear Designer,
Can I ask why not recomended.
The problem is that there is space constraint at discharge end as well as higher temperature which is not recomended for the drive motor.
Deenar Apte ■
Re: Chain Conveyor Drive On Non-Discharge End
Forged link chains are usually designed to be driven by sprocket, not to drive a sprocket. ■
Re: Chain Conveyor Drive On Non-Discharge End
Dear Designer,
Thanks, your reply was very convinsing and I liked its logic very much. However, in special situations as I explained in my last post, one has to resort to using sprockets on both sides and drive on non-dischargeside.
Few years back we have supplied a 21 m long chain conveyor with discharge on both the ends and four inlet in the central zone. Material from the two inlets on the left side was tranported using top conveying to the left side discharge and material from right side inlets was transported using bottom conveying to right side outlet. Obviously the drive was on one end and we had to use sprockets on both the ends.
Deenar Apte ■
Re: Chain Conveyor Drive On Non-Discharge End
Dear Deenar Apte,
Some questions please, just from a bystander who did not see your product:
Why obviously on both ends?
How did you did take up?
What did the chain say to that?
What did the teeth of the trailing (takeup?) sprocket say to that?
What did your purchasing department say to two trailing / takeup sprockets?
Regards
Roland ■
Re: Chain Conveyor Drive On Non-Discharge End
There is the question of the limitations placed on the operation of a chain conveyor by the conveying chain used.
With a forged link chain these are normally uni-directional (which is why most have an arrow forged on the side to show the direction of travel) and so the chain itself cannot be reversed. As a result, depending on the relationship between the inlet(s) and outlet(s), it may be necessary to have a double depth casing with dividing plate on which material is conveyed 'backwards', then dropping to the bottom plate to be conveyed 'forward' to the required outlet(s).
With 'round link' chains, these are bi-directional so the chain can be reversed avoiding the need for a double depth casing and dividing plate. Of course, in the design of the conveyor you need to be aware of what snagging points there might be in BOTH directions, and where the slack chain will accumulate in both forward AND reverse running.
In either case sprockets are only required on the shaft where the drive motor is. ■
Re: Chain Conveyor Drive On Non-Discharge End
Kind Attn.: Shri Deenar Apte,
One can have drive either at tail end or at head end, for chain conveyor. The head end is understood as the conveyor terminal in the direction of material motion. In case of horizontal or up-incline conveyor, when you put drive at tail end, it would require strong take-up system. However, if the conveyor happens to be decline, then possibly you will not need so strong take-up arrangement.
The drive shaft will always have the sprocket. The driven shaft could have traction wheels or two sprockets wherein one is keyed on the shaft and the other is freely mounted.
We come across many chain conveyors for handling of Bagasse wherein both runs are carrying runs and there is nothing like head end and tail end. In this kind of situation, drive end is mounted at any one of the convenient end and considering its responsiveness to the need of the tractive pull. Hundreds of such conveyors are working in sugar plants all over India.
My reply does not relate to reversibility of the chain conveyor. This will depend upon the type of conveyor whether apron conveyor or drag chain conveyor or bucket chain conveyor and so on.
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 ■
Re: Chain Conveyor Drive On Non-Discharge End
The driven shaft could have traction wheels or two sprockets wherein one is keyed on the shaft and the other is freely mounted.
Please note that not all chain conveyors have multiple strands of conveying chain, single chains can be just as effective. Equally many multi-strand conveyors have both wheels keyed to the trailing shaft.
My reply does not relate to reversibility of the chain conveyor. This will depend upon the type of conveyor whether apron conveyor or drag chain conveyor or bucket chain conveyor and so on.
Chain reversibility depends on the type of chain used. ■
Re: Chain Conveyor Drive On Non-Discharge End
Dear Designer & Mr Mulani,
I am quite clear about the fact that the forked forged chains are unidirectional. From your inputs it is also clear to me that when the sprocket drives the chain the round forked end is pushed by the sprocket teeth. Due to the round shape there is a rotary action between the teeth & the link. However, if this chain is used to drive the sprocket, the flat back end shoulder pushes the sprocket teeth and there is no rolling action resulting the force action in a localized area and thus the sprocket may wear off very quickly.
Does it mean that come what may the non driving end has to be a trailing wheel without teeth? But this can result in all the slack being on the conveyong portion of the chain and thus take-up has to be auto (like spring) and not manual screw type to ensure that the chain does not have any slack?
Deenar Apte ■
Re: Chain Conveyor Drive On Non-Discharge End
Sprockets can be used with forked link chain on the non-drive shaft, but they will need to be specially designed to be driven by the chain and different in profile to sprockets that drive the chain
Slack chain on horizontal and slightly inclined conveyors accumulates at the "back" of the driving sprocket.
Spring tensioning is a different subject and something I regard as an instrument of the devil to be avoided at all costs! ■
Excellent Belt Suppliers
Dear all:
I want to know what are the reliable supplier of conveyor belt in USA,Such as PVC belt,AIR SUPPORT CONVEYOR BELT,rubber belt.What is a good brand
I think TRAMCO's conveying equipment have a good belt,High temperature and oil resistance
Please give me some advice.Sincere thanks
Eason Zhang
E: eason.zhang@gsi-china.com ■
Chain Conveyor Drive on Non-Discharge End
Normaly the drag chain conveyors using fork links has drive on discharge side with this end provided with a sprocket for the fork chain and the other end provided with a trailing wheel without teeth.
Can I have an arrangement in which the drive will be on the non-discharge end. I think this is possible by using sprockets on both ends rather than having a plain trailing wheel on one end. Please reply.
Deenar Apte ■