Belt Burn and Shrinkage Overtension
Belt Burn and Shrinkage Overtension
(OP)
Hi All ; I have designed generator driven belt and pulley system and used mercedes bus belt tensioner to tension 8 PK 1150 belt at 21 kW load.
The tension is around normal levels as i measured by gates tension meter.
The system has a flywheel shaft with 200 pulley on it and it is driving a 100 mm diameter pulley.
The 100 mm pulley is in the middle of the transfer shaft this shaft is heaving a 15 kW shock load every time the Air condition compressor clutch activates. (6 kW of the load is continous from the alternator)
This power is enough power to stall the engine but engine wins the stall and regenerates the normal 1500 rpm.
In one of the systems today we noticed that one of the Dayco belt was shrinked from 1150 to 1120 mm.
The engine room temperature is 90 Degrees Celcius
We are using cast iron pulleys
The engine room side is well ventilated
There were many signs of burn on the back side of the belt.
Is this normal or do i have system design failure.
You may find several pictures of the system as attached.
The tension is around normal levels as i measured by gates tension meter.
The system has a flywheel shaft with 200 pulley on it and it is driving a 100 mm diameter pulley.
The 100 mm pulley is in the middle of the transfer shaft this shaft is heaving a 15 kW shock load every time the Air condition compressor clutch activates. (6 kW of the load is continous from the alternator)
This power is enough power to stall the engine but engine wins the stall and regenerates the normal 1500 rpm.
In one of the systems today we noticed that one of the Dayco belt was shrinked from 1150 to 1120 mm.
The engine room temperature is 90 Degrees Celcius
We are using cast iron pulleys
The engine room side is well ventilated
There were many signs of burn on the back side of the belt.
Is this normal or do i have system design failure.
You may find several pictures of the system as attached.





RE: Belt Burn and Shrinkage Overtension
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Belt Burn and Shrinkage Overtension
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(2B)+(2B)' ?
RE: Belt Burn and Shrinkage Overtension
=====================================
(2B)+(2B)' ?
RE: Belt Burn and Shrinkage Overtension
=====================================
(2B)+(2B)' ?
RE: Belt Burn and Shrinkage Overtension
Mike Halloran
Pembroke Pines, FL, USA
RE: Belt Burn and Shrinkage Overtension
Thanks for your comments.
RE: Belt Burn and Shrinkage Overtension
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Belt Burn and Shrinkage Overtension
The Air Condition Compressor is 8 PK and when i calculated the power and take a service a factor of 3 i was still at safe regions so that i designed the complete system with 8 PK
The problem occoured around 40 hours of operation. Some of the other generators are still running at 150 hours but we didnt noticed a similar problem.
Was this our bad chance or will the other systems fail like this one?
Your replies are very important thx
RE: Belt Burn and Shrinkage Overtension
What's different about this one?
Mike Halloran
Pembroke Pines, FL, USA
RE: Belt Burn and Shrinkage Overtension