Agree with Lyle

Heavier covers.

Seems that the issue is the gouging at the inner skirt area..teh famour dual skirt design.....this is always a trouble area > stuff gets caught, rolls arounmd and also can get jamming in between inner and outer skirts.

Look at having one skirt only.....get the steel part down as close as you can to the belt - tapered the gap towards the head end

Make sure that you have plenty of belt support in the load area...do not wanat sag

Make sure that the belt is well tensioned - reduce sag...

Speed is OK

There are other things that you could do..but it seems that you skirts are the immediate issue

Cheers

James ■

Do the input and output conveying rate are matching ?

Rgds, ■

May I suggest you replace your belt with a vibratory feeder? Belts are notoriously poor devices in loading and transition areas, which is the beauty of vibratory.

The cost of replacing belts is generally more than just replacing with a pan feeder, which should not require liner changes for many years.

Thank you,

Thomas Musschoot

General Kinematics Corporation

www.generalkinematics.com ■

Imapact load is given as the cause of damage, but the belt damage appears greatest under the skirts. The provision of a longitudinal insert would prevent direct impact loading on the belt when the hopper is nearly empty. This must be designed to improve, rather than detract from reliable flow in the hopper. The inlet is relatively long, at 6.5 metres, so it may be queried how is this loaded? A revised arrangement with the insert and modified lower hopper section should permit a small taper of the skirts to give an increasing width along the length. This would greatly reduce the prospects of trapping, which seems to be the main culprit causing the damage. There also seems to be considerable build-up on the lower edges of the hopper walls, so a modified design may be to include UHMDP liners on the terminal wall surfaces where, with even a small wall divergence in the direction of travel would significantly relieve contact pressures and minimise wear. ■

Originally Posted by douglnij

We have feed conveyor belt to feed crushed limestone, width of 1000 mm and 6.5 m long under the loading hopper. The conveyor is having set of flat idler rollers and heavy duty belt.

However, The belt gets damage dute to impact load and could not use more then 4 months.

How can I improve this design?

one of the problems you also have with this design is the the forward motion of the feeder belt is pulling against the skirting and as a result pushing the skirting outwardand adding more wear to the top carcass of the belt

As you are not using a troughing idler or impact bar base pulley with troughing idlers adds to the trouble.replacing the feeder with a troughed belt feeder is one option which would help contain the flow and reduce the spillage as the trough created by the idlers would keep it there.

my friends that have posted here are correct in everything they have mentioned as far as remedial repairs.

A further option is the use of rigid urethane skirt boards with the adjustable clamps on the existing belt way to control the spillage and slowing the feeder down as well.

they are well known and well used in many places world wide and allow quick and easy adjustment when the area is empty and exposed with no weight against the skirt boards

but the problem of wear upon the belt used will not go away due to the use of return idlers.as the support method.

not knowing what you desire to do or have the money in operating funds to either repair or replace it is another issue.

A belt feeder is less expensive than a small apron feeder but it will need repairs much more often.

Most belt feeders but not all have troughing idlers to control and stop the outward spillage due to the angle of the trough

Apron feeders deliver at a slower rate due to gear reduction and the feeder plates have little to no dust spillage other than under the ends.

The end all solution is to slow the rate of delivery to the feeder if possible and replace the existing skirting and mounting with urethane skirt boards using adjustable clamps.

In the end it is up to you as;

it will require labor, funding, down time if production schedules will allow it, and proper installation no matter the method employed or equipment installed.

using conveyor belt for skirting is both inexpensive and problematic as the belt threads used to make the weave for the belt and the pressed carcass are very strong and as a result very wear resistant which of course translates to wear on the top carcass.

lzaharis ■