Fan reliability issues
Fan reliability issues
(OP)
Hello,
I have a single-inlet centrifugal, backward inclined, belt driven fan rated at 15000cfm and 3.6kPa differential pressure that has been consistently having higher bearing temperatures compared to the other two identical fans. During start-up the fan also makes abnormal noises and belt failure has been frequent. The bearings and sheaves were replaced two years ago. I am thinking of trying to increasing the sheave size and changing the belt arrangement from 3 to 4 belts. I am looking to take some of the load off the bearing and increase belt reliability without changing the performance requirements of the fan. Is this a good approach? If not what can also be considered?
Thank you.
I have a single-inlet centrifugal, backward inclined, belt driven fan rated at 15000cfm and 3.6kPa differential pressure that has been consistently having higher bearing temperatures compared to the other two identical fans. During start-up the fan also makes abnormal noises and belt failure has been frequent. The bearings and sheaves were replaced two years ago. I am thinking of trying to increasing the sheave size and changing the belt arrangement from 3 to 4 belts. I am looking to take some of the load off the bearing and increase belt reliability without changing the performance requirements of the fan. Is this a good approach? If not what can also be considered?
Thank you.





RE: Fan reliability issues
RE: Fan reliability issues
You need to identify what is different between this fan and the other two "identical" fans. Then assess if that difference would lead to the failures that you are seeing.
Adding a belt might make belts last longer, but it will probably make things worse on the bearings.
RE: Fan reliability issues
RE: Fan reliability issues