What is the temporary distortion of the SSTG rotor after multiple start/stop episodes called?

What is the temporary distortion of the SSTG rotor after multiple start/stop episodes called?

• A. Warped rotor
• B. Bowed rotor
• C. Deformed rotor
• D. Misaligned rotor

Answer: (B)

The term used to describe the temporary distortion of the SSTG (Ship Service Turbine Generator) rotor after multiple start/stop episodes is "bowed rotor." This phenomenon occurs due to thermal stress and uneven expansion or contraction in the rotor material, especially when subjected to frequent temperature changes during operation. In such scenarios, the rotor can develop a slight bow or curvature that may not be permanent and can return to its original shape once the stress is alleviated. This is a critical condition because it can affect the rotor's balance and alignment, potentially leading to operational issues such as vibrations or increased wear on bearings. Understanding this concept is essential for machinists as it helps in diagnosing issues related to rotor performance and longevity and in making informed recommendations for maintenance and operational protocols that minimize such distortions.

The term used to describe the temporary distortion of the SSTG (Ship Service Turbine Generator) rotor after multiple start/stop episodes is "bowed rotor." This phenomenon occurs due to thermal stress and uneven expansion or contraction in the rotor material, especially when subjected to frequent temperature changes during operation.

In such scenarios, the rotor can develop a slight bow or curvature that may not be permanent and can return to its original shape once the stress is alleviated. This is a critical condition because it can affect the rotor's balance and alignment, potentially leading to operational issues such as vibrations or increased wear on bearings.

Understanding this concept is essential for machinists as it helps in diagnosing issues related to rotor performance and longevity and in making informed recommendations for maintenance and operational protocols that minimize such distortions.