Turbine Wheel To Shaft Ratio

There is no answer to your question except more questions.

What are you trying to achieve?

i don't think that there is some abnormal thing in the question. If you want to ask more questions its your will, but i've simply asked is there any specific ratio in which turbine wheel diameter and shaft diameter are designed? is yes then what is that limit. I think now question is more elaborated and you can easily answer in yes or no with reason.

No.

Like Guest #1 I find your question impossible to answer except to say No; there is no specific ratio of shaft diameter to wheel diameter on any type of turbine known to me.

You should not get shirty with people who try to help you.

If you had stated what type of turbine (water, gas, steam etc), the conditions (steam pressure, water pressure etc), the power you wished to produce, the rotational speed that you wish to achieve, what the exhaust conditions of your turbine are and the myriad other things that would be required to determine the diameter of a turbine wheel and the shaft diameter that would be required to support it (them) then you could possibly expect a sensible answer.

The limit is when the turbine wheel to shaft diameter ratio approaches 1.0.

<...180mm shaft diameter what is the maximum size of turbine wheel that can be installed and what is the number of wheels that can be installed on that shaft...>

The upper limit to these two numbers depends, on the first instance, on the mechanical strength of the blades on the turbine, which in the case of a windmill could be several metres, and the length and support of the shaft, which is determined by the design of the machine.

So the questions are not answerable.

Dear Mr. UsmanS,

The main design will involve to design the Turbine Wheel, depending upon the Steam Parameters, Number of Stages, Efficiency Level desired, etc.

Then the Stationary Blades come in to picture and the over-all length of Moving Blades, Clearance between Moving and Stationary Blades, Bearing to be installed etc is decided.

The HP to be transmitted is known and and then Diametre of the shaft is arrived. Then the RIGIDITY of the shaft comes in to picture, to take care of DEFLECTION, RESONANCE EFFECT etc.

Hence ratio of wheel dia to shaft dia cannot be taken as standard and insignficant.

DHAYANANDHAN.S