How do you balance a turbine rotor?
How do you balance a turbine rotor?
Rotors are normally balanced at low speed (400 r/min) and weight adjustment made in two convenient planes, one at each end of the rotor. This adjustment may be by varying screwed plugs in tapped holes, or by adding balance weights at specific circumferential positions.
What is turbine rotor balancing?
Balancing is defined as the process by means of which the mass distribution about the spin axis is checked and is corrected, if necessary, so that the bearing forces and the vibrations of the shaft corresponding to running frequency are within specified limits.
What is borescope inspection in gas turbine?
A borescope is a tool used to view the innermost parts of a machine that would otherwise be virtually impossible to see. Additionally, this device is used to careful inspect turbines and other machines in order to refrain from damaging the item in any way.
When the balancing of the turbine is disturbed we use?
Explanation: When the balancing of the turbine is disturbed, we use emergency governing. These governors come into action only when there are emergencies in the turbine.
Why we need to balance the rotor?
For rotors to operate reliably, they must maintain even weight distribution across the rotational axis. Too much weight on one side creates uneven mass distribution known as “unbalance”. Rotor balancing can help to prevent issues caused by unbalance, reducing noise and vibration and extending the life of your system.
How much is high speed balancing?
Wheel Balancing A typical wheel balance service costs anywhere from $15–$50 per tire.
How do you do rotor balancing?
Typical Single-Plane Procedure
- Set up equipment on the rotor as outlined by the balance equipment manufacturer.
- Make “reference run” or “calibration run,” measuring vibration and phase.
- Add trial weight.
- Make trial run.
- Remove trial weight.
- Add correction weight.
- Make trim run.
- Add trim weight if needed.
What is a borescope inspection?
A borescope is an optical tool used to view areas that would otherwise not be visible. A borescope is inserted into the item being evaluated without destroying the item of interest. Components. A Borescope can consist of. Rigid or flexible working length.
Which turbine has high efficiency?
Large Francis turbines are individually designed for each site to operate with the given water flow and water head at the highest possible efficiency, typically over 90% (to 99%). In contrast to the Pelton turbine, the Francis turbine operates at its best completely filled with water at all times.
How many rotors do GE gas turbines have?
As the OEM, GE knows exactly what’s in your machine—and which version of rotor can replace it. For the 7F gas turbine there have been over 30 turbine rotor modifications, more than 10 compressor rotor enhancements, and more than 100 different blade changes since 1990.
How is a GE heavy duty gas turbine maintained?
Gas Turbine Configuration Maintenance Features The GE heavy-duty gas turbine is constructed to withstand severe duty and to be maintained on-site, with off-site repair required only on certain combustion components, hot gas path parts, and rotor assemblies needing specialized shop service.
How does the EPRI ROTOR program help gas turbine owners?
The EPRI rotor program has developed technology and methods to offer an integrated approach to gas turbine rotor condition assessment and life management. These methods provide turbine owners with an independent evaluation of remaining life with a defined rotor-specific technical basis ROTOR DAMAGE MECHANISMS AND END OF LIFE
What does rotor exchange do for gas turbines?
Our Rotor Exchange program provides you with a gas turbine rotor that has been inspected and if needed, improved to GE’s strict standards, with life still left on the asset. You receive a GE-certified rotor with the latest technology improvements. Best of all, you get it quickly, helping to reduce downtime, especially in emergent situations.