Prevention Methods of Self-excited Vibration due to Dry Friction of Vertical Rotor
Résumé
Recently, because of performance upgrades of rotating machinery, the clearance between rotating parts (Rotor) and stationary parts (Stator) has become very small. Therefore, vibration problems by the contact of rotor and stator often occur. In addition, with some types of rotating machinery, the sliding bearing without liquid lubrication is also used. In such condition, the rotor and the stator always come in contact at bearing sliding surface. So, if the contact condition of rotor and stator is severe (such as friction coefficient of sliding surface is high etc.), various vibration problems may occur. One of the typical vibration problem by friction is self-excited vibration due to dry friction (often called “Friction Whip”). Usually, this type of vibration is prevented by low friction coefficient of sliding surfaces. However, if we can accept high friction coefficient of bearing sliding surfaces, we may use more high performance bearing materials (wear resistance, strength, chemical, durability, material cost, etc.). In this paper, it is investigated that the characteristics and the prevention methods of self-excited vibration due to dry friction between rotor and stator by experimentally approach.
Domaines
Mécanique [physics]Origine | Fichiers produits par l'(les) auteur(s) |
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