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Anonymous Poster #1

Fly Wheel

10/03/2013 11:29 AM

Vertically mounted pump has a flywheel. I want to remove the flywheel for changing bearing. The flywheel has threaded holes on it. Can I use eyebolts on these holes to lift the fly wheel?the pump is 170 kw?
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#1

Re: fly wheel

10/03/2013 11:55 AM

Check where the holes go and what is beneath them. Maybe they are for inserting jacking screws that will push the flywheel off, without need of lifting equipment.

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m.kumar
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#4
In reply to #1

Re: fly wheel

10/03/2013 12:30 PM

the threadedholes are from top to bottom. and there is no lifting option to take the fly wheel to lift. the weight of the fly wheel is 2.5ton.
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LongintheTooth
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#2

Re: fly wheel

10/03/2013 11:57 AM

Can you post a picture ? In some cases the threaded holes are for bolts that push the wheel off the hub. A built in puller, if you will. Need to see it to be sure. darn, missed it by 2 mins , lol. Sounds like a fairly big / heavy flywheel.

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#3
In reply to #2

Re: fly wheel

10/03/2013 12:28 PM

the threaded holes are from top to bottom.the weight of the fly wheel is 2.5ton.and there is no other lifting options to lift the flywheel
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LongintheTooth
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#5
In reply to #3

Re: fly wheel

10/03/2013 12:43 PM

The threaded holes must be able to support the load then. Do you know if the bolt size has 2.5T thread capacity ? If not then you have to arrange for a hoist.

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m.kumar
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#6
In reply to #5

Re: fly wheel

10/03/2013 1:00 PM

sir it is a vertical pump with 4 nos of propeller shafts .the motor is on top next the fly wheel then 4 nos of shafts each 4meter long after that the pump like this order.the pump manufacture is Kubota.now my problem is flywheel bearings need to change.i removed the motor. next I want to lift the flywheel.i have overhead crane but there is no lifting hooks on the fly wheel.can I put eyebolts on the threaded holes to lift the flywheel or can put the lifting belt on te top couplking.the problem is where I have to put the lifting belts.the holes diameter is 40 mm.and there are 3 nos of holes on the flywheel .
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#8
In reply to #6

Re: fly wheel

10/03/2013 1:28 PM

If there are no spokes, a solid wheel, then you may have to make some kind of cradle or lifitng frame.

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LongintheTooth
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#7
In reply to #3

Re: fly wheel

10/03/2013 1:02 PM

How did you plan to lift the flywheel if there are " no toher options to lift " it ? As far as L know , eyebolts are softer than other hardware and may not be able to hold 2.4T in the bolt size you will use. How will you replace a bearing if you cannot hoist the wheel out of the way ? Tell me you will not work under a 2.5T weight supported by eyebolts. I do not know the thread strength of the bolts you stated. If the wheel has spokes I would be belting or chaining around the spokes across the outer edge, If I were doing it.

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m.kumar
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#9
In reply to #7

Re: fly wheel

10/03/2013 2:04 PM

sir the flywheel is this kind as shown in the pic.vertically mounted.
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LongintheTooth
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#10
In reply to #9

Re: fly wheel

10/03/2013 2:16 PM

OK seeing that, I cannot do better than refer you to my post #6. I think I have reached my limit here. it all depends on whether the 40mm bolts will hold the load.

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#11
In reply to #9

Re: fly wheel

10/03/2013 2:52 PM

Better check the manual or talk directly with the manufacturer, this is not the sort of thing you want to accidentally damage (possibly causing a disastrous imbalance) or drop on your foot.

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#12

Re: Fly Wheel

10/03/2013 3:00 PM

This thread just makes me cringe. You wish to lift 2.5 tons of a flywheel and you have no idea how to lift this. You see something that might be some lifting points but you cannot describe these lifting points anymore accurately than to say they are "threaded holes". You provide a picture from a marketing show and say that it looks like this. Are they both grey? You mention the useless information about the power of the pump.

Any concept of the number of holes, the diameter size of the hole, the depth of the tap, the thread dimensions in the hole, the material strength of these threads? The CG of the flywheel is certainly aligned with the axis of rotation but is it above or below these holes.

Do you have a crane and proper rigging rated for lifting more than 3.5 ton? If not then this is a critical lift.

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LongintheTooth
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#13
In reply to #12

Re: Fly Wheel

10/03/2013 3:27 PM

That's why I stopped where I did - it became obvious to me that he is going into this with little if any practical experience and getting info out of him is like sucking eggs, only harder. Perhaps I gave him just enough to be dangerous, but I suspect it was going to be dangerous before writing anyhow. The KW of the pump gave me the first clue that this would be massive. Still I wanted to try to help a little, but he does seem a little over his head. He got the drive off the top and survived, however lol. Too bad it's an AP.

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#14

Re: Fly Wheel

10/03/2013 5:01 PM

Those holes have to be threaded 3/4" preferably bigger. As most 3/4" lifting eyes are rate at 5000 lbs with 0° pull. If you use more then lifting eye the bolt will need to be bigger. Slung with the chains at 45° angle the lifting eye will have to be at lease 1 1/8".

You can't just use any eye bolt. It has to be one designed for lifting. And you need to get the manufactures rating on it to be safe.

You know a picture of what you are dealing with would have help. With out knowing what clearance you have. It hard to make recommendation of other types of lift equipment in the to do the job.

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#15
In reply to #14

Re: Fly Wheel

10/03/2013 5:07 PM

#6 stated he has overhead crane.

Also states 40mm ( 1 1/2 ) bolt holes.

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#16
In reply to #15

Re: Fly Wheel

10/03/2013 6:22 PM

A crane

Another crane

And a final crane

None of these should lift 2.5 ton. If the OP can only ask us how to do this, then my answer is hell no.

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#22
In reply to #15

Re: Fly Wheel

10/04/2013 7:20 AM

Yes i got that. I am questioning the accessibility to the flywheel.

Have removed similar parts with a fork lift. By placing the forks so they cradle underneath with the fork pins locked so the won't spread apart. A little oil or grease at the contact point of the forks. Just enough force on the flywheel with the forks to carry the weight. And it will slide easily off on the lubricant down the forks. In most cases leaves room to replace the bearing. Once that's done just slide it back up the fork in to place should stay pretty much lined up.

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#17

Re: Fly Wheel

10/03/2013 7:01 PM

If the 40mm eye bolts are rated, 2.5 tons should be small potatoes for even just one of them. Use proper rigging technique so that the three lifting chains/cables are relatively steep rather than flat.

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#21
In reply to #17

Re: Fly Wheel

10/04/2013 3:25 AM

thank u sir for ur kind information.the 40 mm eyebolts which I have has a lifting capacity of 10T.and the overhead crane has 7 ton capacity.i will send the pics of the original flywheel and the location from where I have to lift it.
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#24
In reply to #21

Re: Fly Wheel

10/07/2013 1:38 PM

Here's the point to be made:

It would have been much easier to get to the proper answer if you had originally posted :

Vertically mounted pump has a 2.5 ton flywheel. I want to remove the flywheel for changing bearing. The flywheel has 40mm threaded holes on it. Can I use 40mm eyebolts rated 10T on these holes to lift the fly wheel? The pump is 170 kw? We have over head crane with 7 ton capacity.

BUT then, if you had said all of that you would have answered your own question.

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#18

Re: Fly Wheel

10/03/2013 11:15 PM

what is the advantage of including a flywheel for a vertical pump?.

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#19
In reply to #18

Re: Fly Wheel

10/04/2013 2:00 AM

It then has a flywheel while a pump without one has none!

Looks like a new perk from a trade fair! Lets wait what OP has to say about this!

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#20

Re: Fly Wheel

10/04/2013 3:21 AM

Is the concept of making a simple telephone call to the original equipment manufacturer a complete anathema these days?

How about the concept of opening the equipment manual, and actually reading what is inside it? That too?

<sigh>

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#23

Re: Fly Wheel

10/06/2013 4:53 AM

What did the manufacturer (Kubota) recommend?

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#25

Re: Fly Wheel

10/08/2013 12:35 AM

Again. What did the manufacturer (kubota) suggest?

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#26
In reply to #25

Re: Fly Wheel

10/08/2013 10:13 AM

That would be telling.

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IdeaSmith (1); jack of all trades (1); LongintheTooth (8); m.kumar (5); ozzb (2); pnaban (1); PWSlack (1); redfred (3); Tornado (2); Yusef1 (2)

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