Re: Belt Feeders And Skirts
James,
Try providing the round bar with an upward slope towards the discharge. i.e. the gap between belt and round bar increases towards the belt direction.
In this case, any material get stuck between belt & round bar will get released once goes forward due to belt movement.
You can expect some improvement with this modification.
Regards ■
Re: Belt Feeders And Skirts
James:
I would have thought that you are applying the standard double taper: taper vertically, as previously noted, and horizontally at about 3 degrees. Some say 5 degrees over 3. Three degrees equals 260 mm in 5000 mm of length. You've got to have the real estate to make it work. More taper is always better.
We have also used the idea of the round bar inside the skirt wall. We also found that you cannot have a significatn cavity behind the bar as it will get cemented with product and cause undesirable and unpredictable restrictions. There has to be a large enough cavity or full open belt behind the 50 mm bar diameter and with enough space to transport the escaped rocks.
Pinched rocks will ping when their multitude come in combinations that bind in tight spaces.
If you are a student of feeder flow, note the reclaim angle, turning from vertical to horizontal, is much large than most engineers realize. You can take advantage of this principle.
Sorry about being a little cryptic. We try to maintain a little IP. ■
Re: Belt Feeders And Skirts
The product size distribution would be a valuable aid in forming a response. ■
Re: Belt Feeders And Skirts
Thanks Guys
The open "conveying" section is at least 5m long from memory.
The hopper section is double taper as per std practise.
We have the "picking" troughed carry idler config..so double taper means a bit of room laterally that we do not have plus we will be traversing up the wing idler/angle acc.
Limestone is <100mm and down to dust size.
The bed depth is 230mm.
I can appreciate the comments.
The only other thought would be to try a "lay in" skirt rubber eg ESS 2000 skirt system and remove the fixed steel skirt to about 100mm above the rubber. As long as the rubber can withhold the material inside without popping out it may work
Thanks
James ■
Belt Feeders And Skirts
Hi All
I am interested to learn what others have used for the skirt systems for belt feeders/conveyors.
Our feeders are typ inclined with "picking" type idlers - half a trough type with a lenght of up to 5m past the hopper outlet to convey the material from the hopper to the transfer point to another conventional belt conveyor.
The belt support is impact type rubber and steel shell idlers all the way...close spaced acc.
TU is screw type. Speed is very slow acc. for feeder duty.
For small "hard" rock materials eg limestone, the rocks gets them selves under the rubber skirting and "ping" out leading to spillage - this occurs when the rock roll under the skirt between the idlers.
I have tried an inner steel skirt with round bar edging placed 30mm on the inside of the skirting boards and mounted with a 2-3mm clearance to the belt. Some success - but U then get material trapped in this gap and belt cover scoring can occur.
Other materials eg sand etc are not an issue.
I am interested in what other have found to work well or better.
Cheers.
James ■