Coupling design!!!!!!

[toiting]

Dear Specialist,

This topic is only discuss in your idea or your experience about coupling design.
Who have any idea, can we design coupling flange and coupling hub is square shape?
I think it can be done but it must be symmetry design and strong bolts.

Young Engineer.

 

[MacGyverS2000]

You COULD, but what advantage would you get from doing so, and how would they outweigh the serious DISadvantages?

Dan - Owner

http://www.Hi-TecDesigns.com

 

[toiting]

I have no idea why design shape is round. I'm just thinking but no idea.

 

[3DDave]

Instead of bolts, why not use hot rivets to install couplings?

 

[BrianE22]

You'd generally want to have as little mass and rotational inertia as possible. A square design would have some low stressed areas that give it mass but don't contribite to the performance.

 

[DAVIDSTECKER]

https://www.youtube.com/watch?v=JILP_4GJJH0

This shaft alignment video should answer most of your questions.

 

[SnTMan]

toiting, some advice: In the future, lose the exclamation points

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[MikeHalloran]

PIPE couplings are round in the interest of minimum weight, and maximum strength against moments applied in planes that are unknown at time of manufacture.

SHAFT couplings are round, for the same reasons, plus to avoid product liability suits on behalf of yahoos who stick their anatomy into the alternately full and empty space within the trajectories of the corners while the shaft is rotating. Plus, if the shaft rotates really fast, aero noise generation is possible, and is usually undesirable unless you are manufacturing a siren.

You will find that minimum weight for maximum envelope is a strong design constraint in many products including couplings, because the manufacturer has to buy the raw material by weight.



Mike Halloran
Pembroke Pines, FL, USA

 

[JJPellin]

I find it hard to believe that the OP is really asking about making a square coupling hub. There may be another way to interpret this. If I was looking at the coupling hub from the side, they typically have a cylindrical section with a round flange at one end. Perhaps they mean to ask if this could be made to be a simple cylinder from end to end. From the side, it would have a cross-section that was square. Coupling hubs like this are not uncommon. We have a number of them. For relatively large shafts with relatively low torque, this is an option. The bolts that bolt the spacer or center member to the hub would be long bolts passing all the way through to the backside of the cylindrical hub. I could probably find a drawing of one of ours if I had to dig for it.

Johnny Pellin

 

[1gibson]

You can design whatever you want, but they're round because eventually someone has to manufacture them, usually on a lathe.

 

[toiting]

Thank you for all answer that make me clear some doubt.