4 edition of Dynamic behavior of a magnetic bearing supported jet engine rotor with auxiliary bearings found in the catalog.
Dynamic behavior of a magnetic bearing supported jet engine rotor with auxiliary bearings
G. T. Flowers
by TSI Press, National Aeronautics and Space Administration, National Technical Information Service, distributor in Albuquerque, N.M, [Washington, DC, Springfield, Va
Written in English
|Statement||G.T. Flowers, H. Xie, S.C. Sinha.|
|Series||[NASA contractor report] -- NASA CR-197860., NASA contractor report -- NASA CR-197860.|
|Contributions||Xie, H., Sinha, S. C. 1947-, United States. National Aeronautics and Space Administration.|
|The Physical Object|
Turbocharger bearing support and rotor dynamics Bearing support and dynamics of turbocharger rotors Most of turbocharger (TCH) rotors are supported in floating-ring bearings (Fig. 1, item 4). These bearings are undemanding from manufacturing point of view and at the same time have good dynamic properties, resulting from high damping of the two File Size: 1MB. one of the five degrees of freedom must be supported by an active or mechanical bearing. In this system, an actively controlled magnetic thrust bearing provides such support. The thrust magnetic bearing works against the negative axial stiffness due to the PM radial bearings, about x N/m, in addition to the rotor weight of 16 kg. A File Size: KB.
Rotor Bearing Solutions International is an engineering consulting services firm in Charlottesville, Virginia specializing in rotordynamics, bearing analysis, analysis active and passive magnetic bearing systems, and vibration analysis. or teach an industrial seminar on the fundamentals of rotordynamics, fluid film and magnetic bearings. The gap between rotor and bearing amounts typically to a few tenths of a millimeter, but for specific applications it can be as large as 20 mm. In that case, of course, the bearing becomes much larger; The rotor can be allowed to rotate at high speeds. The high circumferential speed in Cited by: 2.
This validation is carried on using the frequency response of the rotor-bearings system in directional coordinates. For this purpose, a test rig was assembled in order to evaluate the behavior of the rotating system when supported by hydrodynamic bearings with different wear patterns. The experimental measurementsCited by: 2. The book is organized in a logical fashion, starting with an overview of the technology and a survey of the range of applications. A background chapter then explains the central concepts of active magnetic bearings while avoiding a morass of technical details.
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This paper presents a study of the dynamic behavior of a rotor system supported by auxiliary bearings. The steady-state behavior of a simulation model based upon a production jet engine is explored over a wide range of operating conditions for varying rotor imbalance, support stiffness, and damping.
Influence of backup bearings and support structure dynamics on the behavior of rotors with active suppor Dynamic modelling and response characteristics of a magnetic bearing rotor system including auxiliary be.
This paper presents a study of the dynamic behavior of a rotor system supported by auxiliary bearings. The steady-state behavior of a simulation model based upon a production jet engine is explored over a wide range of operating conditions for varying rotor imbalance, support stiffness and damping.
This paper investigates the steady-state responses of a rotor system supported by auxiliary bearings in which there is a clearance between the rotor and the inner race of the bearing. A simulation model based upon the rotor of a production jet engine is developed and its steady-state behavior is explored over a wide range of operating conditions for various parametric Cited by: feature which may significantly impact the behavior of the rotor.
Magnetic bearing systems appear to provide particularly great promise for use in aerospace applications. There are active programs at many of the major jet engine manufac-turers to develop engines supported by magnetic bearings. Safety is a major concerns in any aeronautical design.
To. expected steady-state dynamical behavior for an auxiliary bearing supported rotor. Simulation results for a rotor based upon a production jet engine are presented and discussed.
The model used in the current study has two principal components - lhe rotor and the auxiliary bearings. Dynamics of the rotor systemDynamics of the rotor system, supported by the active magnetic bearings LeontievLeontievM. Professor MAI, general director of the engineering & consulting centre The III International Scientific and Technical Conference «Aeroengines of the XXI century» of Alfaof Alfa--Tranzit TranzitCo., LtdCo., Ltd.
Orbit and time-history data from a full speed drop and spin down are presented and discussed in detail. A transient, nonlinear rotordynamic analysis simulation model was developed for the machine to provide insight into the dynamic behavior. The model includes the dead band clearance, the flexible backup bearing support, and hard by: The objective of the work is to develop a better understanding of the dynamic behavior of a magnetic bearing supported rotor system interacting with auxiliary bearings during a.
Rotor dynamics is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage.
At its most basic level. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation.  presented the bifurcation analysis of a rotor supported over ball bearing system with different nonlinear excitation forces.
Chen  modeled the unbalanced rotor dynamic system by considering the bearing clearance, Hertzian forces on the bearing. The bearing supported over ball bearings was studied by many works.
Get this from a library. Dynamic behavior of a magnetic bearing supported jet engine rotor with auxiliary bearings. [G T Flowers; H Xie; S C Sinha; United States. National Aeronautics and Space Administration.].
In this paper, possibility of identification of a crack appearing in flexible rotor systems supported with active magnetic bearing has been investigated. A cracked rotor with active magnetic bearing (AMB) support in auxiliary bearing configuration has been analysed for identification of crack and end support bearing by: 4.
During a rotor-bearing contact event – when the magnetic field has disappeared and the rotor drops on the backup bearings – the structure of the backup bearings has an impact on the dynamic. The dynamic behavior of a rotor rubbing, especially rubbing fully with a motion-limiting stop is investigated by numerical and experimental methods.
In the dynamic simulation, the sinuous excitation force with low frequency excites the large whirl of the unbalanced rotor and thus causes the rubbing between the rotor and the by: Key words: Rotor Bearing, Finite Element Method, Campbell diagram, Natural Frequency.
INTRODUCTION Rotor dynamics is specialized branch in which study includes the lateral and torsional vibration of rotating shaft. The basic component of rotor dynamics is shaft or rotor.
It also includes disc and the bearings which supports the rotor. Before power is applied to the bearings the rotor is supported on two auxiliary cage, dry lubricated ball bearings located in close proximity to the AMB.
The clear- ance between the rotor and the inner race of the ball bearing is selected to prevent rotor contact with the AMB pole pieces or the internal seals of the compressor while the rotor. On Dynamics and Stability of the Automotive Engine Turbocharger Rotor Supported by the Electrodynamic Passive Magnetic Bearings T.
Szolc In the paper dynamic investigations on the automotive turbocharger rotor-shaft supported on the electro-dynamic passive magnetic bearings (EDPMB) and on the traditional floating-ring journal bearings have been.
In the application of active magnetic bearings (AMB), one of the key problems to be solved is the safety and stability in the sense of rotor dynamics.
The project related to the present paper deals with the method for analyzing bearing rotor systems with high rotation speed and specially supported by active magnetic bearings, and studies its rotor dynamics Cited by: 1.
rpm can be considered as another successful application of aerodynamic bearings. These blowers use bearing support similar to that of expansion turbines.
Fig. shows typical design of a blower with aerodynamic rotor support and high-frequency motor drive . Journal bearings 2.This paper presents laboratory results on the measurement system of a magnetic suspension bearing system for a jet engine rotor of an unmanned aerial vehicle (UAV). Magnetic suspension technology enables continuous diagnostics of a rotary machine and eliminates of the negative properties of classical bearings.
This rotor-bearing system consists of two radial magnetic bearings Author: Paulina Kurnyta-Mazurek, Artur Kurnyta, Maciej Henzel.In this paper, the dynamic behavior of a rotor-bearing-SFD system with the inner race defect of bearing is investigated.
The contact force between the rolling element and the race is calculated in Hertzian contact and elastohydrodynamic lubrication condition. The supporting force of the SFD is simulated by integrating the pressure distribution derived from Reynolds’s by: 1.