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gopal gadhavi
Active Contributor

Join Date: Jan 2011
Location: india
Posts: 12

Jacking Oil System

01/03/2011 2:48 PM

why jacking oil not required at 3000 in turbine?

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jdretired
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Engineering Fields - Marine Engineering - New Member

Join Date: May 2007
Location: Australia.
Posts: 1642
Good Answers: 81
#1

Re: Jacking Oil System

01/03/2011 6:32 PM

Oil wedge

Regards JD.
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gopal gadhavi
Active Contributor

Join Date: Jan 2011
Location: india
Posts: 12
#2
In reply to #1

Re: Jacking Oil System

01/03/2011 7:14 PM

thank u so much

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Natarajan
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Join Date: Jul 2010
Posts: 60
Good Answers: 1
#3

Re: Jacking Oil System

01/06/2011 6:19 AM

Please ask the question with sufficient detail. What this 3000?. I will take 3000 as speed of turbine shaft. We know that Jacking oil is required to lift the turbine shaft during startup. I think oil wedge will be formed while the shaft is running. Then how the oil wedge will replace the work of jacking oil. If oil wedge will do the work of jacking oil then we can eliminate jacking oil in 1500 rpm turbines also. please clarify.
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dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
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#4
In reply to #3

Re: Jacking Oil System

06/07/2013 1:22 PM

Dear Mr. Natarajan,

You are right and I agree with your views. Wedge does not help. The question is NOT clear.

In fact jacking is more important when the Turbine has tripped, and the Temp. is high.

DHAYANANDHAN.S
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dhayanandhan
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Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#5

Re: Jacking Oil System

06/07/2013 1:26 PM

Dear Mr. gopal gadhavi,

Your question is not clear. If I understand correctly, you mean for the speed of 3000 (and more) jacking is not required.

Jacking is a MUST when the Turbine has tripped and when it is HOT.

DHAYANANDHAN.S
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dhayanandhan (2); gopal gadhavi (1); jdretired (1); Natarajan (1)

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