You need to examine the wrap angle and the life expectancy of the return roller directly in front of the drive.

What is the reason for the central screw take-up? Your take up pulley diameters are very small so check there as well.

Your last impact idler set is outside the material fall.

Most of us have seen far worse. ■

Originally Posted by udithausk

Hi

we have one tilt container , 40 ft . we need to fill this container 20tons/5min rate , we design the basic trough conveyor with large feeding hopper. feeding done by wheel loader.

as my calculation , conveyor incline angle - 25 deg , length 11M , width 1000 mm rubber 5 ply (12mm) Belt , we choose drive roller 450 mm , shaft 60 mm

conveyor is running 2 m/S speed

as my calculations , Motor power is 5.5 KW ,33 RPM

any institution person have experience in this application ?

as experience my power calculation is correct ? (formulation and safety factors are Ok , I need to figure is practice ok?)

I propose two dust collection point and 1 DC for this application ,

please check the my diagram ?

any expertise or any person can you help me?

Attachment 41998Attachment 41999Attachment 42000 /

Regards

Uditha

Originally Posted by johngateley

You need to examine the wrap angle and the life expectancy of the return roller directly in front of the drive.

What is the reason for the central screw take-up? Your take up pulley diameters are very small so check there as well.

Your last impact idler set is outside the material fall.

Most of us have seen far worse.

----------------------------------------------------------------------------------------------------------------------------------------------------------------

Can we walk this back a bit?????

What is the loaded capacity of this container??

Why not use a portable electric six inch grain auger on wheels

to load the container for the job??

The auger elevators are raised and lowered using hand operated cable

winches.

Much less work and effort needed to load it as the elevator dumping end

can be wheeled right into the container while it is ON THE TRAILER/lorry

or the lorry backed to the lowered grain auger with the spout inside the container.

The elevators portable plastic loading boot is small and it makes less of a mess

and 6 inch grain augers are very fast in fill rates.

A smaller machine can fill the container much more easily with no trouble.

It will take a few minutes longer but it will be less costly and besides that you

have to worry about a containers floor or wall being pushed out by the coal too

if you try to flood load it. ■

Dear Leon,

by the grain auger you mean screw conveyor?

Have you ever experienced it for coal?

If yes, what was the length and how was the maintenance?

I guess screw conveyor's bearings and abrasion make problem, isn't it? ■

Originally Posted by mohandes

Dear Leon,

by the grain auger you mean screw conveyor?

Have you ever experienced it for coal?

If yes, what was the length and how was the maintenance?

I guess screw conveyor's bearings and abrasion make problem, isn't it?

------------------------------------------------------------------------------------------------------------------

Yes the grain auger is also a screw conveyor.

Lots of folks use augers for coal specifically many coal stokers for home

and business use utilize augers/screw conveyors.

They are very basic, veyr easy to maintain and augers that are a carriage mounted (twin wheel set/single axle)

are easy to move around with a proper trailer hitch and a responsible tractor or lorry driver.

Coal will wear an auger faster than grains BUT it is an opportunity cost issue M. Mohandes-

being fewer parts and much less cost.

1. The auger/screw is self contained with the power head at the end of the screw conveyor and is belt driven in

almost all cases except in some coal stoker boilers/furnaces

2. They have a minimum of parts

a. electric motor with V belt drive

X number of screw sections-depending on length

X number of shells sections-tubes

1. The electric motor most are single phase 220-230 volts

2. V belt driven Pulley at the end of the discharge boot-end of auger

3. bearings at both ends to support the auger/screw

4. the steel shell/tube

5. no speed switches, idlers, head pulley or tail pulley or conveyor belting.

6. no splices, mechanical or vulcanised

The auger and tube will need to be replaced on occasion but the repair is a quick and simple

thing as long as you have the tools and the parts to do the job or a spare unit to replace the

original unit to allow you to quickly swap out a wheel mounted auger/screw conveyor

and repair the other unit in a work shop or during the dry season on dry stable ground or

a concrete pad with a small lift crane(one day rental) and the parts ready to assembl the new tube and screw(s).

Give me a minute to upload a few things for you as I want you to be an informed consumer. ■

please contact Lyn Bates here on the forum

Westfield grain augers. www.grainaugers.com

Or

www.sukup.com

the one thing you need to expand on is whether the container is to be top loaded or end loaded. ■

Hello,

Belt conveyor power calculation is not complex. For the conveyor being mentioned by you, the power can be easily calculated by formulae in DIN22101, ISO5048 and IS11592. India being member of ISO, the result by all these three will be nearly similar. The power calculation formulae are not lengthy. Sri Lanka being close to India, I have also mentioned IS.

Regards,

Ishwar G. Mulani

Author of Book: Engineering Science And Application Design For Belt Conveyors (new print November, 2012)

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: conveyor.ishwar.mulani@gmail.com

Website: www.conveyor.ishwarmulani.com ■

Standard freight containers, those acceptable to customs scrutiny, will not have top openings. Responsible customs officials are more concerned with people dealers and drug smugglers and much less concerned with legal payload which they can inspect by breaking out 2 rear door seals. The top opening recommended by European Union publications ignore this detail and expect customs officers to climb 2.5m aloft in all weathers to examine the cargo. They will then have to record 5 seals instead of 2 and if the top loading container is not resealed, by whoever, the contents are exposed to all sorts of ingress for the rest of their journey. It would be better to use a covered tipper truck than one of these silly lid containers. So in the presented scenario it seems that the tipping frame is laughably preferred. Designing a suitable belt conveyor is hardly simple since the conveyor must retract to clear the descending 40 footer. This also raises the conveyor skywards in the first place and thereby increases the material fall to levels which are considered unacceptable in most conveying applications. Tilting also presents difficulties for trimming. Trucks are loaded, usually, by shovel and the final heaped pile is leveled by slamming the brakes on as soon as the loader can reach the following vehicle. Deceleration reaches about 0.7g, by law, and the payload settles down. Trimming tilt loaded containers should require a trimming acceleration of the same proportions. Of course it never gets such acceleration and the cargo weight distribution, or absence of it, overloads the tractor 5th wheel. Seriously forget about 40 footers. If vehicles are impounded for axle overloading there will have to be a rethink. A very serious rethink. Consider that you might encounter, should always really, 20 footers and then your belt conveyor is some 5m above where it should be.

This thread talks about 40 footers so a screw conveyor seems out of the picture unless the trough can be designed to accept severe cantilever loading.

Your operation is definitely not simple and requires a lot more thought. Did you have time?

"They are very basic, veyr easy to maintain and augers that are a carriage mounted (twin wheel set/single axle)

are easy to move around with a proper trailer hitch and a responsible tractor or lorry driver." I am overjoyed to read this and will explain my reasons once my 1/5th prototype working video is ready to show. ■