Frequent belts damaged
Frequent belts damaged
(OP)
Hi,
We are burning transmission belts on a conveyor like a hell. The conveyor is driven by a sensorless vector drive and the starting inertia is quite high. Previousy the drive was tripping on overload during start-up , so I have configured the drive for full torque at almost zero speed. The capacity of the drive is 75 k W.
They have used belt tensioner to adjust the belt but without much success.They assume they are using the right belts.
I would like to help the poor mechanical guys to solve their problem.
Grateful for any input .
Bob
We are burning transmission belts on a conveyor like a hell. The conveyor is driven by a sensorless vector drive and the starting inertia is quite high. Previousy the drive was tripping on overload during start-up , so I have configured the drive for full torque at almost zero speed. The capacity of the drive is 75 k W.
They have used belt tensioner to adjust the belt but without much success.They assume they are using the right belts.
I would like to help the poor mechanical guys to solve their problem.
Grateful for any input .
Bob





RE: Frequent belts damaged
Correct alignment of belt, rollers, and guides - if the belt is rubbing somewhere this will cause large loads.
Check also with the belt off that all of the rollers can be turned easily, also that there are no pieces of old broken belt jammed between the rollers and support structure.
Lastly: "They assume they are using the right belts" - assumption is the mother of all ****-ups.
Good Luck,
gwolf.
RE: Frequent belts damaged
RE: Frequent belts damaged
and radius of the drive pulleys or sheaves.
RE: Frequent belts damaged
My ignorance, but I don't know what you mean by a "sensorless vector drive".
However, if it were a belt conveyor with a 75 kW drive I would be thinking of a fluid coupling to give give a 'soft start'.
When selecting conveyor drive components you need to know :-
the estimated absorbed power,
the estimated torque required to start acclerating the machine,
the inertia of the machine.
RE: Frequent belts damaged
RE: Frequent belts damaged
With the VFD you can adjust the acceleration time to reduce the starting current for the high inertial load. This will certainly help with your belts if the problem is not mechanical and is related to a fast starting time.
RE: Frequent belts damaged
These areas worth looking into;
- if it's a toothed belt, confirm that the belt matches with the pulley, also check the pulley condition, especially the teeth.
- if it's a v-belt, most of the belt problem is related to pulleys alignment, it's even more obvious for a micro-V type. also check the grooves condition.
- if any part come into contact with the belt during running, in most cases, the culprit is the cover itself, you open it up during check-up and always see nothing wrong!
- improper tensioning
- if the belt is a stretchable type, check the elasticity.
Best regards,
ct