Keyway calculation

Simulation Generality
1

Hello everyone,

I have a mecha calculation to perform, i.e. a key calculation on a door system with lifting by 2 chains.
First of all, I would like to make sure of the torsional moment Mt on my sprocket.

The data are:
Ø50 shaft
Sprockets 25.4mm
Mass to be lifted 1600KG
2 channels 16B2
1.5kW Motor

 

Anyone have an idea to calculatethis?

Thank you very much! Have a good day everyone.

 

 

1 Like
2

Hello

Look at this webpage

http://jean.lamaison.perso.neuf.fr/clavette.php

it looks good to me for a keyway calculation

 

6 Likes
3

Hello

Look here it can help you.

http://www.calculatoredge.com/french.htm#mechanical

Good luck.

2 Likes
4

Hello

To size your key, you will probably need the tangential force on it.

To get the torque on the shaft: Mt = Fp x d with Fp = the reaction due to the mass of the gate and d = the primitive radius of the pinion.

If the CDG of your door is centered, Fp = (m x g) / 2 = 8000 N (considering g = 10 N/kg)

From there, the effort on your key Fc = Mt / Tree.

Then you can use the link provided by @Tomalam

3 Likes
5

Hello

Attention to safety......... on a guillotine door!!!!!!!

Friction, door adhesion, phenomes/cables or chains, ....... especially if it's an oven door...

Don't hesitate to oversize your key+ other components.

 

Julian

 

4 Likes
6

Indeed, I only mentioned the mass of the door, but that's the bare minimum. The phenomena mentioned by Julian must also be analyzed (not specified in the question). And, at the very least, you have to take a safety coeff on this value.

If the dynamics are low, a coeff of 1.5 should suffice. If there are shocks or jolts, don't hesitate to take margins of 3 or 4.

3 Likes