Pump Motor Coupling

You didn't know what you were buying?

Now you don't know how to solve the problem you have created?

Hire a competent engineer to design a coupling, or move the motor closer to the pump. You obviously are not capable of making intelligent technical decisions.

Hire someone to fix your mistakes.

You seem to have many more problems than you have experience.

Good luck, you're gonna need it.

the old one wes made in Czech Republic branch of siemens which has been shutdown long ago and the old motor was also a non standard line design. siemens told us clearly they no longer produce the old motor frame size machines .so we were with no other choice .

no offense.

Then, hire a mechanical engineer to modify the mounting or design a pump coupling.

I'd advise you modify the mounting brackets to fit the new motor.

Pump couplings require very close tolerances to be trouble free.

Send the wrong motor back, and get it swapped for the right one.

better if you can replace this with a new motor as per the old dimensions.

This isn't rocket science. Move the motor mounts 5.5" closer to the pump.

Or get a coupling that accommodates a shaft-to-shaft gap. Such couplings are made, for instance, to allow shaft seal replacement without moving the motor and disturbing the alignment.

yes exactly i am looking for such a coupling.what is the name of this coupling?

It's called a spacer-coupling. Most coupling manufacturers make them. Not sure you'll get a 5.5" spacer though.

He can buy a LynDoor™Industries Stretchum^® coupling stretcher to make it longer.

Don't forget to specify if the keyway is round or triangular.

Will it still be able to handle the torque though? It might be better to use a Shrinkum on the baseplate, if such a thing existed.

Haven't quite got the Shrinkum perfected. The last time we tried it we ate a 10 foot deep hole in the customer's floor.

thank you so much .can you specify the maximum coupling gap beyond which international standards like IEC etc prevent use of pump and motor coupling using spacer couplers.

best regards,

Seriously, as ChaoticIntellect suggested, can't yousomeone in your organization modify the motor mount/baseplate to fit the new/standard motor with the existing coupling? Has the shaft diameter been measured - is it the same as the original motor? You may be surprised by the cost and delivery time of a new spacer coupling. And as someone else mentioned, you may still have to raise (hope not lower) the motor. Surely the electrical connection isn't that hard to re-do, is it?

Here's an example of a spacer coupling. You will have to check with the pump and motor manufacturers to make sure their shafts and bearings are designed to accomodate the extra loading of a spacer coupling.

Somebody needs their bum spanked for not making sure the new motor at least had the proper shaft length. A motor of this size is likely made to order and could have had the correct shaft length done at the time of manufacture. Probably could have had shaft height and bolt spacings made to match the old motor, too.

Jon.

There maybe more fly in the ointment. Since the frame size is no longer made. The acquired motor may not match up in alignment. The center distance of the shaft from the base may be different.

That'll be the source of another thread.

That's when I'll sell them an offset shaft coupling and jack bolts.

I think Schmidt beat you to it. (I'd like to see one of these babies at 1800 or 3600 RPM. From a distance, maybe on video.)

What is the gap in coupling recommended by the manufacturer?. Modify base/rails of motor to shift motor near the pump to maintain the same gap.

why not get the old motor rewound. New bearings and a lick of paint and no coupling required.

See page 17 of this catalog:

http://www.ktr.com/root/img/pool/pdf/produktkataloge/us/us_gesamt/RADEX_INCH.pdf

Or page 17 of this one

http://www.gheier.no/Kataloger/Rexnord%20Koblinger/Thomas_catalog__inch_.pdf

btw. Is this a water pump? What is the cost of the complete unit vs. cost of a 450kw, 11kw motor? What is the cost of the complete unit vs. cost of same with a less expensive (than Siemens) motor? Ditto cost of re-wind (excellent point, Silverfox). Was any of this considered?

Aligning/connecting pump & motor shafts is the least of concerns for pump manufacturers/suppliers. This is all so obvious (nod to ChaoticIntellect), if you have no engineers on site/available, how on earth do you ever manage to run this pump in the first place?