Numerical investigation on the vibration reduction of rotating shaft ‎using different groove shapes of tilt bearing‎
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Mustansiriyah University, Mechanical Eng. Dep. Baghdad. Iraq
Submission date: 2023-03-07
Final revision date: 2023-04-24
Acceptance date: 2023-06-11
Online publication date: 2023-06-17
Publication date: 2023-06-17
Corresponding author
Ahmed Imad Abbood   

Mustansiriyah University, Mechanical Eng. Dep. Baghdad
Diagnostyka 2023;24(3):2023304
Vibration control is very important for high-speed rotors. Long shafts in gas turbines, ships, and other high-speed rotating equipment benefit from oil film damping. The tilt bearing's groove increases oil flow and suppresses rotor system vibration better than the plain bearing. This paper analyzes a groove-shaped oil flow (GSOF) to reduce rotor system vibration, which is supported by sliding bearings. To study the vibration-damping effect of flow oil shape with GSOF, a different groove shape in bearings was set up and measured. Fluent for oil flow and Transient structural for vibration measurements benefit from ANSYS software. This paper numerically simulates the groove-shaped damper's damping under the rotor system using these terms. Three vibration and settling time enhancements were found. First, the circular groove reduced amplitude by 35.71% and stilling time by 10%. Next, it reduced amplitude by 42.85% and settling time by 0%. The inclined groove reduced amplitude 42.85% and settling time 12%. Finally, the triple-inclined groove reduced amplitude and settling time by 57.14% and 20%, respectively. ‎
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