Chain conveyor

[hoshang]

Hi
Please see the attached image:

Truss A & truss B are supporting a chain conveyor platform with capacity 100t/h-150t/h.
Are there any references for the analysis and design of such a structure? Are there any thoughts on considerations for such a structure?

 

[hoshang]

Any thoughts would be appreciated.

 

[r13]

Is this a new addition to the roof truss, or existing? In either case, you need to provide more information, a drawing of the conveyor is a good starting point; also you need to shown where the conveyor is to be placed in relationship to the roof trusts. Do you have loading/reaction from the manufacture?

 

[hoshang]

Is this a new addition to the roof truss, or existing?

All are new.

you need to provide more information

Please find the link:

https://www.screencast.com/t/YE0dM7QDfQ

where the conveyor is to be placed in relationship to the roof trusts

The conveyor is to be placed on top of Truss B.

Do you have loading/reaction from the manufacture?

No.

 

[r13]

You need to get the dead load (weight), rated static load (lift) capacity of the carriage, impact factor, deflection limit, and recommended connection detail/method. After gather all information, the design shall be straight forward - truss supporting moving load. Also, it is helpful to do some research on CMAA for add'l design considerations.

 

[human909]

I do plenty of design work for chain conveyors. I wouldn't say it is particularly different or challenging. Work out appropriate loads from the manufactures drawings, weight of trough, chain and product.

Do you have loading/reaction from the manufacture?
No.

Reaction is relatively easy to work out based on motor power AND/OR sliding friction of the product. Motor power should give you an upper limit unless the motor is a braked motor (which most are not).
In practice I would normally expect that lateral loads from the conveyore are going to be less that other loads such as wind or seismic.

Can I ask who the manufacturer of the chain conveyor is?

 

[hoshang]

Can I ask who the manufacturer of the chain conveyor is?

Please find this link:

http://cukurovasilo.com/

 

[human909]

Thanks. Contact the supplier for head, tail, trough and chain weights. Work out product weights based on product density and volume. Go from there.

 

[hoshang]

Contact the supplier for head, tail, trough and chain weights. Work out product weights based on product density and volume.

Do you mean I need only weights without consideration of dynamic effects of the chain conveyor on the supporting structure?

 

[human909]

As mentioned previously the dynamic effect aren't generally considerable. The lateral loading can be calculated from the motor torque/power. In most cases nominal lateral restraints should be fine.

In some cases aka flood fed chain conveyors you can start dealing with high torque loads and high lateral loads. EG one I dealt with recently was a peak load of 65kN off a 23,000Nm motor. But that is far from the norm.

But you need to get the specs for the conveyor you are considering.

 

[hoshang]

EG one I dealt with recently was a peak load of 65kN off a 23,000Nm motor

How much would the lateral force be for our 100ton/hour-150ton/hour capacity chain conveyor?

 

[human909]

As I keep saying you need to look at the motor specifications AND/OR do your own mass, acceleration, friction calculations if you don't know the motor size.

The conveyor I mentioned pulling 65kN was only 200ton/hour but it was long and was flood fed which can drastically increase load. In reality I think the conveyor motor was overdesigned, but if the motor is capable of pulling 65kN, then I want to be able to resist that!

The rest of the 200ton/hour conveyors in that section probably have about a tenth of the lateral load.

 

[hoshang]

As I keep saying you need to look at the motor specifications

As I said, these are the available info from the manufacturer:

https://www.screencast.com/t/YE0dM7QDfQ

http://cukurovasilo.com/

 

[human909]

Hoshang. I've tried to be as helpful as possible but you need more information than that. You are the engineer, we on this site are happy to help but you need to do you own work here.

Contact the manufacturer or your supplier. Every conveyor is custom designed to suit the application the motor is sized for the needs of the conveyor. The brochures you have linked are just marketing brochures they have little important engineering information. Certainly not enough to answer any of the questions you want.

 

[hoshang]

The conveyor I mentioned pulling 65kN was only 200ton/hour

Is 65kN the lateral load for 200 ton/hour capacity?

 

[human909]

No. Hoshang. You are presumably an engineer. Put your skills to use. If you are not or this is too challenging for you then seek expert advice.

 

[hoshang]

The lateral loading can be calculated from the motor torque/power

How the lateral loading can be calculated? Where this lateral load should be applied on the steel frame supporting the chain conveyor?

 

[r13]

hoshang,

You need to talk to someone within your company. Hope there is a past design case with calculations that you can study and follow.