Tips on Motor Bearing Load Calculation

[oss39347]

Hi all!

I would like to seek assistance or advice on how to calculate the load on the Motor Inboard Bearing as shown in the image. Drive train specification is as follows:

1. Motor Power = 720 kW
2. Rotational Speed = 1738 RPM
3. Fan Brake Power = 644 kW

Thanks!

 

[electricpete]

Each motor bearing carries roughly half the weight of the motor rotor.

There may also be some load induced by misalignment, difficult to know.

If the motor has proper internal allowance for thermal expansion, there is no axial load from motor rotor expansion.

The power, speed, brake horsepower have no relation to the bearing load.

The motor bearing sizing is done by motor manufacturer, typically seems to have very large margins. We don't have any reason to question it except perhaps something like a belt drive.


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(2B)+(2B)' ?

 

[Tmoose]

Please describe the flange coupling more.
What type bearings in the motor? If sleeve bearings, the coupling must have the limited end float option, and as a part of what epete said, the axial gap portion of alignment at installation is a big deal.

 

[oss39347]

Hello! Thanks for your responses. Motor bearings are Deep Groove Ball Bearings, specifically NSK 6226.