Re: Ceramic Lagging
Your second point is not true. There is no significant loss of power with rubber or ceramic or bare steel shells.
The belt does shrink as it is driven over the pulley. THis is due to the change in belt tension and resulting loss of elongation. This can be called slip. Slip will occur due to the loss of tension from T1 to T2.
Ask pulley manufacturers for the information you seek. ■
Re: Ceramic Lagging
I believe the use of the ceramic versus rubber is to reduce or eliminate the slip, plus increase the life of the lagging.
If this intern reduces the T1 and Motor rating requirement it would be a bonus, but not it’s primary purpose.
The Flexco site at http://www.flexco.com/ under Bulk Material Handling may provide the information you are looking for. ■
Re: Ceramic Lagging
Dear Mr. Bulk-Offline,
The friction coefficient comparative value between herringbone pattern rubber lagging and ceramic type lining are as below, as mentioned in DIN, which possibly you may be also knowing :
a) Rubber covered conveyor belt, condition dry, for herring bone grooved rubber lagging and belt, friction coefficient 0.4 to 0.45. In the dry condition this value is same between belt and ceramic lining.
b) Rubber covered conveyor belt, condition wet-clean, for herring bone grooved rubber lagging and belt, friction coefficient 0.35. This value in case of belt and ceramic lining is 0.35 to 0.45, i.e. higher compared to the rubber lagging.
c) Rubber covered conveyor belt, condition wet-contaminated with clay or loam, for herring bone grooved rubber lagging and belt, friction coefficient 0.25 to 0.30. This value in case of belt and ceramic lining is 0.35, i.e. higher compared to the rubber lagging.
There are comparative advantages and disadvantages which can be known from the concerned suppliers and I would not like to comment about the same. The ceramic lining demands higher level of design consideration, for movement of belt around the pulley.
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 25882916 ■
Ceramic Lagging
I am informed that use of ceramic lagging on drive pulleys have two direct impacts on conveyor performance -
1. Lower T1 (due to higher 'mu' of ceramic vis-a-vis rubber) permits selection of belts with lesser rating, and
2. The motor rating required is also lower due to more efficient traction at the drive pulley
Where, on the net, can I find some more information and data about the advantages (and disadvantages) of using such lagging ?
Is there also any data about the life of such lagging vis-a-vis rubber lagging ?
Looking forward to answers, as always ....... ■