Name: Fully Suspended, Five-Axis, Three-Magnetic-Bearing Dynamic Spin Rig with Forced Excitation (en Inglés)
SKU: 59974472
Price: 558.02 MXN
Availability: InStock
Author: Morrison, Carlos R. ; Nasa Technical Reports Server (Ntrs) ; Et Al
ISBN: 9781289271565

portada Fully Suspended, Five-Axis, Three-Magnetic-Bearing Dynamic Spin Rig with Forced Excitation (en Inglés)

Fully Suspended, Five-Axis, Three-Magnetic-Bearing Dynamic Spin Rig with Forced Excitation (en Inglés)

Formato

Libro Físico

Autor

Nasa Technical Reports Server (Ntrs)

Carlos R. Morrison

Editorial

Bibliogov

Idioma

Inglés

N° páginas

Encuadernación

Tapa Blanda

Dimensiones

24.6x18.9x0.2 cm

Peso

0.07 kg.

ISBN13

9781289271565

Categorías

Política y gobierno

Fully Suspended, Five-Axis, Three-Magnetic-Bearing Dynamic Spin Rig with Forced Excitation (en Inglés)

Nasa Technical Reports Server (Ntrs) (Autor) · Carlos R. Morrison (Autor) · Bibliogov · Tapa Blanda

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Reseña del libro "Fully Suspended, Five-Axis, Three-Magnetic-Bearing Dynamic Spin Rig with Forced Excitation (en Inglés)"

The Five-Axis, Three-Magnetic-Bearing Dynamic Spin Rig, a significant advancement in the Dynamic Spin Rig (DSR), is used to perform vibration tests of turbomachinery blades and components under rotating and nonrotating conditions in a vacuum. The rig has as its critical components three magnetic bearings: two heteropolar radial active magnetic bearings and a magnetic thrust bearing. The bearing configuration allows full vertical rotor magnetic suspension along with a feed-forward control feature, which will enable the excitation of various natural blade modes in bladed disk test articles. The theoretical, mechanical, electrical, and electronic aspects of the rig are discussed. Also presented are the forced-excitation results of a fully levitated, rotating and nonrotating, unbladed rotor and a fully levitated, rotating and nonrotating, bladed rotor in which a pair of blades was arranged 180 degrees apart from each other. These tests include the bounce mode excitation of the rotor in which the rotor was excited at the blade natural frequency of 144 Hz. The rotor natural mode frequency of 355 Hz was discerned from the plot of acceleration versus frequency. For nonrotating blades, a blade-tip excitation amplitude of approximately 100 g/A was achieved at the first-bending critical (approximately 144 Hz) and at the first-torsional and second-bending blade modes. A blade-tip displacement of 70 mils was achieved at the first-bending critical by exciting the blades at a forced-excitation phase angle of 908 relative to the vertical plane containing the blades while simultaneously rotating the shaft at 3000 rpm.