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Mechanical Engineer

01/15/2014 2:25 AM

is it possible to remove mechanical over speed device from design of steam turbine?

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#1

Re: mechanical engineer

01/15/2014 3:32 AM

It is certainly possible but definitely not recommended.

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#8
In reply to #1

Re: mechanical engineer

01/15/2014 11:57 PM

That was my first knee jerk response.

Then I started to think about all the other ways of monitoring overspeed, safety controlers, redundant checks, etc, and came to the conclusion that (unless it violated codes) it would be quite reasonable to design other overspeed monitoring devices that could actually respond faster and with more predictive functions such as rate of rise of speed, monitoring head pressure, along with data logging and trending.

The options could be quite interesting and still be relatively fail safe.

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#18
In reply to #8

Re: mechanical engineer

01/16/2014 7:27 PM

Perhaps it should be noted that the OP only asked about removing a critical safety device from a design and did not offer any evidence or indication that another device was being considered to replace it.

Had that been the case, some responses may have been quite different or even absent from the discussion.

The phrasing, grammar and punctuation of the question indicate that the author may not be employed in an environment of innovation, but that's just my opinion.

Please negate all the negative responses by offering some actual solutions to the problem at hand so that the OP may get on with his removal of the, "mechanical over speed device from design of steam turbine".

Thank you for your interest in the topic.

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#20
In reply to #18

Re: mechanical engineer

01/16/2014 7:40 PM

I have often worked with people whose second language is English. Their phrasing and questions so often lack the nuances of the language that it is easy to assume there is lack of intelligence behind it rather than assuming it was a reasonable question but poorly expressed. I find a frank discussion is far more productive, and can open up all sorts of positive constructive ideas.

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#21
In reply to #20

Re: mechanical engineer

01/16/2014 7:49 PM

My remarks were not an impeachment of the OP's intelligence, but rather an opinion of his employment circumstances, and intentions.

Even someone unschooled in the language was able to make their intentions of removal of a feature known, or so I believe.

Some terse statement as to the end result of improvement or an alternative could surely has come forth, as well.

Maybe not.

The bell has been ring and statements made by numerous members.

Opinions have been given and time marches on.

All due respect to you.

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#2

Re: mechanical engineer

01/15/2014 3:38 AM

Would tangential disintegration be considered a mechanical overspeed device?

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#17
In reply to #2

Re: mechanical engineer

01/16/2014 7:04 PM

I believe there would also be a radial component to the disintegration.

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#22
In reply to #17

Re: mechanical engineer

01/16/2014 9:33 PM

Not really, but at a distance it would look about the same.

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#23
In reply to #22

Re: mechanical engineer

01/16/2014 10:13 PM

Now that I think about it, yup, you're right !!

Cheers !!

(mutter, mutter, must not reply in haste before putting fingers in gear.)

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#3

Re: mechanical engineer

01/15/2014 5:59 AM

Dear Mr.pesho,

Even though the Answer for your question is YES, IT IS POSSIBLE TO REMOVE OVER SPEED RIPPING DEVICE, it SHOULD NOT BE DONE since Protection of the equipment, safety of operational staff, is very much important.

In the event of explosion due to enormous centrifugal force, it will create a CATOSTROPHIC DISASTER. I have come across a case about 7 years back, the over sppeding of Turbine resulted in the damage of the coupling, and broken to pieces and flown away and fallen far away - 2 KiloMeters away from the Factory.

The weakest point in the system will fail and in this case it is the coupling was weak and broken. If Turbine is exploded, the steam will engulf the entire area, visibility is not possible and untill and unless the steam valve at Boiler is closed - the problem will compund second after second.

DHAYANANDHAN.S

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#4

Re: mechanical engineer

01/15/2014 8:56 AM

Yes, though the proposal is nonsense.

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#5

Re: Mechanical Engineer

01/15/2014 9:51 AM

Just say NO to drug addled questions.

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#6

Re: Mechanical Engineer

01/15/2014 12:27 PM

Yes, one can remove anything from a design. In your case you will now have a dangerous design that nobody should build.

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#7

Thinning The Gene Pool

01/15/2014 3:23 PM

Doing this will surely get you a Darwin Award!

Your title is very misleading. I have corrected it for you.

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#9

Re: Mechanical Engineer

01/16/2014 5:52 AM

....and the OP is gone, probably never to return.

The question was dumb, so I don't blame him, he probably realised it after reading a few answers...

The standard of manners on the internet simply gets worse daily.....

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#10
In reply to #9

Re: Mechanical Engineer

01/16/2014 11:45 AM

Do you blame them when remarks such as Darwin Award and other demeaning remarks are given?

We are rapidly dissintegrating into name calling and making demeaning remarks. The person should not be attacked, but the problem addressed.

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#11
In reply to #10

Re: Mechanical Engineer

01/16/2014 12:08 PM

I don't blame anyone. Making sure that the OP clearly understands how dangerous a capricious design change can be seems prudent to me. I also don't blame the OP for asking if this can be done. It can but at great risk.

I take my opening remark here back. What I do blame is the idea that we should coddle anyone that proposes an apparently dangerous act. Abuse is always inappropriate and IMHO abuse is not present in even the jokes of this thread.

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#12
In reply to #11

Re: Mechanical Engineer

01/16/2014 12:27 PM

IMO you assume everyone has pretty thick skin.

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#14
In reply to #12

Re: Mechanical Engineer

01/16/2014 4:02 PM

If they haven't, they are in for a rough ride when asking stupid questions......at least the end effect will be to toughen them up, if they can handle the ride!!

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#15
In reply to #14

Re: Mechanical Engineer

01/16/2014 5:01 PM

Drug addled, Darwin Award - sorry, that is abusive.

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#16
In reply to #15

Re: Mechanical Engineer

01/16/2014 5:32 PM

So you claim but nobody else has come to agree with you.

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#19
In reply to #15

Re: Mechanical Engineer

01/16/2014 7:33 PM

You have the same choice here as with a TV program you don't like.......you either change the channel or switch it off.......

Manking and moaning changes nothing!!

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#13
In reply to #10

Re: Mechanical Engineer

01/16/2014 4:00 PM

The OP sets the level, as in this case......I did not post the DA answer, but I do agree with it.

The world is a rough place, so is CR4, he can either handle it or maybe not!!!

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