Transcription of CHAPTER 3 ROTORDYNAMIC PARAMETERS OF …
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CHAPTER 3 ROTORDYNAMIC PARAMETERS OF …
CHAPTER 3. ROTORDYNAMIC PARAMETERS OF BEARINGS, SEALS AND DAMPERS. In previous CHAPTER rotor systems were analyzed for simple cases by taking the shaft as flexible and the bearing as rigid. However, in the real case bearings do provide flexibility to the rotor system. Depending upon the type of bearing or other kind of supports ( , seals, dampers, etc.), these provide both the stiffness and the damping to the rotor system (or some times added-mass or inertia terms). In the present CHAPTER , procedure to obtain these dynamic properties of the support system will be explained. First, rolling element bearings will be introduced and classified, then relationship between the load and the deformation will be derived from the basic Hertzian contact theory.
86 3.1 Rolling Element Bearings Rolling element bearings or simply rolling bearings are the most common type of bearings and it has around 94% usage in industry (around 5.5% for hydrodynamic/static oil/air journal bearings, and less
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