Re: Heavy Duty Tracking/Training Idlers
You might get a better response in the Trough Belt Conveying forum.
https://forum.bulk-online.com/forumd....php?forumid=9
You can look at Tru Trac trainers - I have used them with much success but not in the temperature extreme like the oil sands of Alberta though.
http://www.tru-trac.com/troughtracker.htm
Canadian Distributor is
[http://www.wilattconveyors.com/belt-tracking/index.html ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Tracking/Training Idlers In Oil Sands
Thank you, Gary,
We moved the post.
Reinhard Wohlbier ■
Re: Heavy Duty Tracking/Training Idlers
What is the theory behind the tru-track trainers? Do they work based on a difference in drag along the width of the belt? ■
Re: Heavy Duty Tracking/Training Idlers
The key is the central pivot and the tapered ends of the center roll.
C&P from their website.
"The Tru-Trainer reacts as the belt tracker moves off center it will contact the tapered section of the roller on that side of the conveyor belt. The effect of this will be to force the roller to rotate on its central pivot causing the belt to come back to its original position (centered)."
In other words it will be constantly trying to center the belt. ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Re: Heavy Duty Tracking/Training Idlers
Originally posted by Gary Blenkhorn
The effect of this
Right, but why does the contact of the belt on the taper cause the roller to pivot?
What I figure is that since the diameter is smaller, the surface of the roller will have a slower velocity and therefore will have less drag along that area.
i.e.
Let D1= diameter at center
Let D2= diameter at tapered edge
roller is rigid, therefore same RPM
V= circumference velocity
V1 > V2
D=drag along roller
D1 > D2
Thoughts?
Thanks. ■
Tracker
We produce an tracker without side guiding rollers, but ist is not tapered on both ends please see
http://www.stas-nl.com/fileupload/StasCobra.pdf
We can also send you an englisch version if you need some more information
Best regards
J. Croezen ■
Re: Heavy Duty Tracking/Training Idlers
Diana Marie
We at Tru-Trac Rollers are the world wide distributors, manufacturers and patent holders of the Tru-Trac tracker roller.
This is the tracker you were asking about, which has a taper either ends.
Please look at our website
href="http://www.tru-trac.com" target="blank">www.tru-trac.com for more info.
We have used the tracker successfully in very cold conditions, as in Mudanjiang Power Station in China were tempratures in winter go below -40C. Our tracker is running for more than 3 years in these conditions. We also have many installations in Canada.
Regarding the oil sands, one of the big problems is wear on the lagging. We can lagg our tracker in high abrasive polyurethane for extra life in such conditions.
We can customize / design / modify our tracker for your unique requirements. As I know you are also using wide very heavy duty belting.
Attached is a picture of our Heavy Duty Tracker called the Dual Return Tracker. We can supply the tracker with greasable bearings, should you require. The centre pivot is also greasable.
Please contact me for more information if you are interested.
Thanks
Jonathan Rogoff
href="mailto:jonathan@tru-trac.com">jonathan@tru-trac.com
Attachments
tru-trac dual return heavy duty poly tracker (JPG)
■
Re: Heavy Duty Tracking/Training Idlers
Hello Diana,
Away from pulley terminal, only idlers are in contact with belt. Therefore, aligning (shifting) force can only be created by idlers. In context of engineering rules, such action can be created by utilising following means / options :
1) Idlers set or rollers placement skew in horizontal plane (i.e. roller/s axis not exactly along belt width). Such situation can have varied commercial names such as pivoted idlers or idler with forward tilt etc.
2) Idler set or roller/s placement skew in vertical plane. The aligning / shifting force can arise by gravity or belt tension component exerting force on idler-up placement. This statement applies to trough shape or entire idler place like “road / rail banking”. This can also have different names. Gravity or other force finally creates aligning action through idlers only.
3) Relative small difference in roller diameter (tapering / expanding diameter at particular location). Such roller would result in to push / pull force along belt length in certain zone at that location, due to introduction of certain degree of sliding motion of belt on roller, and consequent lateral shifting force.
Serial no.1 and 2 are extensively used.
The presence of some shifting force does not always imply occurrence of actual alignment. Such end result depends upon magnitude of opposing frictional resistance due to total grip of belt on idlers and belt tension component that would oppose belt shifting.
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.
Email : parimul@pn2.vsnl.net.in
Tel.: 0091 (0)20 25871916 ■
Re: Heavy Duty Tracking/Training Idlers
Hi All,
With all due respect to those that manufacture tracking idlers, if you don't address root cause issues that are creating the tracking problems they, the tracking idlers, invariably become maintenance issues themselves. It has been my experience that they should only be used on low tension belts and in low tension areas and then only for insurance purposes. I have some papers on simple procedures to identify the root cause of tracking problems if you are interested (email: colin.benjamin@gcsm.com.au).
Colin Benjamin
Gulf Conveyor Systems Pty Ltd ■
Belt Trainer
Hello,
See that you are looking for Belt trackers,
Take a look at the website www.technitrack.no
We are probably the most experienced trackercompany worldwide.
Tracking a belt without side/guiderollers are difficult if you want full control and our trackers have proven their function in almost all kind of temperatures and environments.
Regards
Harry Holtar ■
Belt Trainer
Hello,
Sorry saw that I made a mistake regarding the web address the correct address is
www.technotrack.no
Regards
Harry Holtar ■
Re: Heavy Duty Tracking/Training Idlers
Away from pulley terminal, only idlers are in contact with belt. Therefore, aligning (shifting) force can only be created by idlers. In context of engineering rules, such action can be created by utilising following means / options :
1) Idlers set or rollers placement skew in horizontal plane (i.e. roller/s axis not exactly along belt width). Such situation can have varied commercial names such as pivoted idlers or idler with forward tilt etc.
2) Idler set or roller/s placement skew in vertical plane. The aligning / shifting force can arise by gravity or belt tension component exerting force on idler-up placement. This statement applies to trough shape or entire idler place like “road / rail banking”. This can also have different names. Gravity or other force finally creates aligning action through idlers only.
3) Relative small difference in roller diameter (tapering / expanding diameter at particular location). Such roller would result in to push / pull force along belt length in certain zone at that location, due to introduction of certain degree of sliding motion of belt on roller, and consequent lateral shifting force.
Serial no.1 and 2 are extensively used.
The presence of some shifting force does not always imply occurrence of actual alignment. Such end result depends upon magnitude of opposing frictional resistance due to total grip of belt on idlers and belt tension component that would oppose belt shifting.
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.
Email : parimul@pn2.vsnl.net.in
Tel.: 0091 (0)20 25871916
I am not clear about the serial number 2. Can this be used at places like vertical take ups?
If somebody attaches photo of this type will be helpful.
Thank you. ■
Heavy Duty Tracking/Training Idlers
I am looking for a heavy duty training idler that is suitable for a troughed belt conveyor carrying oil sand and operating in temperatures as low as -60C (-78F).
Does anybody have any good experience with a certain type?
Does anybody have any feedback on the type that does not use side guide rollers, but instead works because of a taper at either end of the roll?
Thanks. ■