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# Steam Turbine Rotor Lift Measurement

10/25/2016 12:31 AM

How can we calculate rotor lift of a steam turbine via jacking oil pump?

Pathfinder Tags: Rotor lift
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#1

### Re: Steam Turbine Rotor Lift Measurement

10/25/2016 1:43 AM

Try here first!

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#2

### Re: Steam Turbine Rotor Lift Measurement

10/25/2016 1:48 AM

With only one sentence of information, you can't. In fact no one can.

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#3

### Re: Steam Turbine Rotor Lift Measurement

10/25/2016 1:55 AM

How about measuring it rather than trying to calculate it? (Perhaps too many variables.)

Maybe a pressure regulator on the jacking pump output might also help. For instance, it could enable height adjustment.

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#4

### Re: Steam Turbine Rotor Lift Measurement

10/25/2016 12:14 PM

How much shaft clearance do you have? Take that and divide by two. That is the rotor lift when jacking oil exceeds the minimum allowed pressure. Doh!

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#5

### Re: Steam Turbine Rotor Lift Measurement

01/03/2017 11:17 PM

Rather physically measure the shaft lift with a DTI at each journal, providing you have sufficient space to do so. On a 500mm dia shaft the lift is around 0.2mm but they all differ slightly.

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