What is shaft eccentricity?

An eccentricity is one of the major factors that affect the entire system by causing whirling of the shaft and premature failure of the shaft at high vibration condition. Such high vibration condition can be controlled by an important technique called vibration-monitoring technique.

What is TSI in turbine?

A Turbine Supervisory Instrumentation System (TSI) is a sophisticated, customisable digital computer system used in heavy industry to monitor active turbines for potential flaws, faults, and failures.

What is axial displacement of turbine?

Axial displacement of a steam turbine rotor is the displacement of rotor because of differential pressure of inlet and outlet. Displacement is further restricted or controlled or maintained by thrust bearings.

What is thrust bearing in steam turbine?

Thrust bearings hold the axial position of the rotor in rotating machinery, transmitting the axial load from the rotor to the stationary structure. Rolling element, magnetic, and hydrodynamic bearings are the three basic types of thrust bearings used in power generation machinery.

What is turbine eccentricity and turbine position?

Turbine eccentricity is the amount that the turbine shaft deviates from a perfect circle while in motion. Essentially it is how much it wobbles. Turbine position is sometimes referred to as spindle position and it refers to the horizontal movement of the shaft. You must log in or register to reply here.

What is the eccentricity of a 100MW steam turbine?

I have a 100MW steam plant. For your information, turbine was tripped on high vibration during heat soaking at 2200 rpm. Unfortunately the eccentricity remained at 0.150 mm (limit should be below 0.075 mm). Finally, it was decided to check further on the HP turbine bearing # 1 and # 2.

Why can’t we do machining of shafts in eccentricity turbine?

But practically 100% accurate machining of shaft cannot be done because of which its C.G. lies either little above or below its rotating axis Hence due to whirling the shaft will start bending towards its C.G. and at one point the shaft will fail due to bending. What is this eccentricity turbine?

What is meant by an eccentricity of a rotor?

Eccentricity is generally termed with rotation of rotor in the casing. Since at rest condition, rotor would lie mid third and 4th quardant. Once it starts to roll , rotor changes it position. At rated rpm, rotor nearly lies in 4th quadrant. It is not rotating along with the centre axis of rotation.