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I've read that page, and I don't think it answers my question: in this particular application, why would axial load be a concern? How would axial load be applied?
From this non-engineer's perspective, radial load capacity is really all that should matter.
I've read that page, and I don't think it answers my question: in this particular application, why would axial load be a concern? How would axial load be applied?
From this non-engineer's perspective, radial load capacity is really all that should matter.
When you say "particular application", are you asking the forum why it's necessary that a bearing inside the intermediate shaft of a Porsche M96 engine needs axial thrust control?
If so, the intermediate shaft is like an airplane's propeller, when the engine engages and shaft is under load, there is axial thrust. That thrust on the shaft could damage a cylindrical type bearing.
When you say "particular application", are you asking the forum why it's necessary that a bearing inside the intermediate shaft of a Porsche M96 engine needs axial thrust control?
Yes, exactly.
If so, the intermediate shaft is like an airplane's propeller, when the engine engages and shaft is under load, there is axial thrust. That thrust on the shaft could damage a cylindrical type bearing.
I'm hoping somebody could explain where that axial load comes from. My non-engineer's mind doesn't understand what would cause it.
I hope I am remembering this correctly. The other end of the IMS has a plain bearing with no thrust control at all. So all of the thrust load is handled by the IMSB at "this" end of the IMS. I can't say I know where the load comes from, it is probably not a large load, but it exists. Probably any spinning shafts has some thrust load, even if it isn't for some explicit purpose. So it is important for the IMSB bearing to handle it. It is getting hard to find the reference (source) for this point, but it is here somewhere on the forum.
I'm hoping somebody could explain where that axial load comes from. My non-engineer's mind doesn't understand what would cause it.
Beyond taking a class in mechanical engineering, one of the quickest sources of information is by going to YouTube and searching "axial load engines". There are many videos that describe and demonstrate axial load/thrust.
If so, the intermediate shaft is like an airplane's propeller, when the engine engages and shaft is under load, there is axial thrust. That thrust on the shaft could damage a cylindrical type bearing.
I can understand axial load in this particular example (airplane prop), because the prop is pulling the plane forward. But, in the case of the IMS, that factor doesn't exist.
I'll try to set aside some time to cruise youtube...
06-02-2019, 05:37 PM
engineering: thrust load on IMSB
