Conveyor Brake
Least cost is place small brake on head pulley high speed shaft. Can also act as sort-of-holdback. This assumes conveyor does not roll back when stationary. However, your conveyor will likely roll back with 10% grade. You need engineer to give you details and timing if using brake as hold-back.
Brake can be electric solenoid for reliable service. ■
Re: Brake On Belt Conveyor
Hello Chirucan,
For the application mentioned by you, the best location for the brake is on high speed coupling of the drive unit. It will give proper performance and it is also economical. It is too small a conveyor to have a separate location for brake.
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.
Pune, India.
Tel.: 0091 (0)20 25871916
Email: parimul@pn2.vsnl.net.in ■
Re: Brake On Belt Conveyor
Hi Chirucan..
You do not mention the conveyor's capacity.
If low capacity, you should put a "high speed" holdback as an integral part of the drive's gearbox.
If high capacity, the drive would be more substantial, and the higher inertia of the drive would tend to explain the long run-on time when coasting empty.
If the holdback torque is greater than 12kN-m at the pulley, then a low speed holdback is indicated, and should be situated on the opposite side of the drive head pulley. You can then maintain the drive unit even if the belt is fully loaded.
High speed brake to be fitted to the drive, as recommended by the learned gentlemen above
Cheers LSL Tekpro ■
Holdback On Low Capacity Or High Capacity
If high capacity, the drive would be more substantial, and the higher inertia of the drive would tend to explain the long run-on time when coasting empty.
If the holdback torque is greater than 12kN-m at the pulley, then a low speed holdback is indicated, and should be situated on the opposite side of the drive head pulley. You can then maintain the drive unit even if the belt is fully loaded. ....................
Cheers LSL Tekpro
Dear Mr.Spriggs,
At the gearbox input shaft , ( or its next shaft ) the RPM is high and the torque is low. Holdbacks fixed here are smaller , easy to handle. So replacing them are faster than the holdbacks at the drive pulley. Because at the drive pulley, RPM is less , shaft is huge, so holdback is also very, very big.
I was not knowing the limitation factor of 12kN-m for fixing the drive pulley hold back.
Regards, ■
Brake on Belt Conveyor
Hi,
Conveyor Details:
Length: 60 m
Lift: 6 m
Material: Iron Ore
Take-up on tail pulley, Drive on Head Pulley
Allowable stopping time: 10 Sec in any condition
While conveyor is fully loaded it is stopping in less than 5 sec, but while conveyor is empty it is stopping in about 30 sec.
Questions:
What is the best location to have Brake?
If Brake is fitted on Head pulley weather to fit brake on LSS or HSS?
If brake is fitted to Head pulley do I still require Holdbak?
Any other consideration?
I would appreciate your input. ■