By Fredric F. Ehrich
This new release provides a few 50 tables and figures, reflecting new units and phenomena because the 1992 version, rather within the layout of rotating equipment. 4 chapters hide vibration issues in layout; analytic prediction of rotordynamic reaction; and balancing of versatile.
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Extra resources for Handbook of Rotordynamics
Sample text
By im properly fabricated couplings or splines. Although there is a difference in the response curves away from critical speeds for the two types of residual unbalance, as described in Sec. 1, the ramifications of placem ent o f critical speeds are identical. 1 Single-Shaft Rotors A generic representation of a single-shaft single-span tw o-bearing machine is shown in Fig. 11a. In this system, the stator and its m ounts as well as the rotor are assumed to be axisymmetric. All the elem ents are present that must be considered for proper placem ent of critical speeds relative to operating speeds— not only the mass and stiffness characteristics of the roto r but also the dynamic characteristics of the structure supporting the rotor—the bearings, the stato r, and the stator mounts.
53 Magnetic bearing schematic (Calaford and Lancee, 1986). 36 Sensor signal ---------------------------------------------- Magnetic bearing control loop schcmatic (Cataford and Lancee, 1986).
This section focuses on two characteristics of particular im portance to rotor vibration response— the dynamic stiffness and dam ping coefficients o f some representative bearing types as reported in recent literature. , Wilcock and B ooser (1957), Pincus and Sternlicht (1961), Booser (1983). Bearing Types A great variety of bearing geom etries and types have been used over the years Schematic diagrams are given for six representative types in Fig. 21a th ro u g h /. The first two types, the partial-arc and the two-axial-groove bearings, are both versions of the plain cylindrical bearing.