FWM Project Ball Bearing Study- Steel Balls – vs- Ceramic Balls.
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Transcript of FWM Project Ball Bearing Study- Steel Balls – vs- Ceramic Balls.
![Page 1: FWM Project Ball Bearing Study- Steel Balls – vs- Ceramic Balls.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649d8c5503460f94a7354c/html5/thumbnails/1.jpg)
FWM Project
Ball Bearing Study- Steel Balls –vs- Ceramic Balls
![Page 2: FWM Project Ball Bearing Study- Steel Balls – vs- Ceramic Balls.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649d8c5503460f94a7354c/html5/thumbnails/2.jpg)
FWM Project- Surface
Ball Bearing Contact SurfacesSurface Roughness:Raceway~ 3AABall ~ 0.1- 1.0 AA
Surfaces are ground, honed and lapped.
![Page 3: FWM Project Ball Bearing Study- Steel Balls – vs- Ceramic Balls.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649d8c5503460f94a7354c/html5/thumbnails/3.jpg)
FWM Project- ContactGeneralized Hertz Contact Case
distancesdirection principle arey andx
,
12
3 2
122
where
b
y
a
x
ab
Q
2
22*
3
1
2
22*
3
1
2
22*
11
2
3
,
11
2
3
11
2
3
EE
Q
lyadditional
EE
Qbb
and
EE
Qaa
II
I
I
II
I
I
II
I
I
Steel-Steel Cermic-Steel
![Page 4: FWM Project Ball Bearing Study- Steel Balls – vs- Ceramic Balls.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649d8c5503460f94a7354c/html5/thumbnails/4.jpg)
• Ball Bearings are referred to as “anti-friction” bearings because of the small amount of friction.
• Discuss sources of friction and relative amounts (effect of lubrication)
• Wear will not occur if there is proper lubrication• Discuss contact fatigue, Weibul charts and
method to calculate the L10 life of ball bearings
FWM Project- Friction, Wear, Contact Fatigue
![Page 5: FWM Project Ball Bearing Study- Steel Balls – vs- Ceramic Balls.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649d8c5503460f94a7354c/html5/thumbnails/5.jpg)
• Discuss the differences in the minimum film thickness required for each material (based on composite surface roughness)
FWM Project- Elastohydrodynamic Lubrication
![Page 6: FWM Project Ball Bearing Study- Steel Balls – vs- Ceramic Balls.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649d8c5503460f94a7354c/html5/thumbnails/6.jpg)
• Discuss the differences found between steel-steel and ceramic-steel contacts
• Compare with industry test results
• Make determinations on why the predictions do or do not match test results
FWM Project- Summary