Rotor-Stator Rubbing Contact in an Overhung Rotordynamic System
Increases in turbomachine efficiency are often achieved via higher operating speeds, increased shaft flexibility and decreased fluid film clearances. Unfortunately, these changes increase susceptibility to faults such as rotor-stator rubbing contact. Rubbing contact between the rotor and stator results in decreased machine life via increased wear, heightened susceptibility to fatigue, and adverse thermal effects. Preventing rub requires detailed knowledge of the coupled rotor dynamic-triboelement dynamic conditions.