shaft size with grooved profile

[fischer]

Good morning to all,
I have a big doubt about the size of a tree for an electric motor with profile grooved at one end.

on the shaft a pair is produced (we assume 100nm on the 120mm stretch) between the two bearings; the same is transmitted outside through the above profile. the shaft is supported by two bearings (diameters ø30 and ø25 in the attached design).

I would like to calculate the radial load on the bearings, but for how I see it if the shaft is balanced (and if we lose the proper weight) the load is null.

Is this statement correct? (I hope it was clear in the explanation)

 

[zeigs]

so, since it is about electric motor, iho yes.
if I send it through a gear no (in general not, for example the shaft led by an epicloidal reducer presents all the balanced forces and return to yes...)
Let us put it like this: if you generate a pure torque on the tree, then the bearings do not transmit any force, and it is the case of common electric motors

However, I am doubtful whether the rotating field of the stator also creates a radial force (breaking also this and in phase with the field). I have to deal with electrotechnical notes. . .

 

[meccanicamg]

Good morning to all,
I have a big doubt about the size of a tree for an electric motor with profile grooved at one end.

on the shaft a pair is produced (we assume 100nm on the 120mm stretch) between the two bearings; the same is transmitted outside through the above profile. the shaft is supported by two bearings (diameters ø30 and ø25 in the attached design).

I would like to calculate the radial load on the bearings, but for how I see it if the shaft is balanced (and if we lose the proper weight) the load is null.

Is this statement correct? (I hope it was clear in the explanation)

Hi fischer,
as they told you, if you only have a torque moment you have no radial load. if you apply external loads such as belts or serrated wheels, you need to calculate the force that moves.

 

[bisogna_rimanere_umili]

but what diameter does the shaft have and that at wheel speed?
even if you have neglected the weight just isn't that there may be flexional vibrations?

 

[Kakisan]

Hi fischer,
I think you shouldn't have any problems with radial loads if you transmit the motion to the next tree via an axial joint (radex? ).
as mentioned in previous posts, if you have belts or dentate wheels you will surely have a radial load, even if you went out with a helical wheel you would have axial load.
Given the grooved profile on the end part of the shaft, I suggest you feel the manufacturer, because surely the output creator "will win" the ø30 on which the bearings are centered, guaranteeing a lower centering.
good work and good day.
yellow

Good morning to all,
I have a big doubt about the size of a tree for an electric motor with profile grooved at one end.

on the shaft a pair is produced (we assume 100nm on the 120mm stretch) between the two bearings; the same is transmitted outside through the above profile. the shaft is supported by two bearings (diameters ø30 and ø25 in the attached design).

I would like to calculate the radial load on the bearings, but for how I see it if the shaft is balanced (and if we lose the proper weight) the load is null.

Is this statement correct? (I hope it was clear in the explanation)