Active Bearings
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Algoritmo de autoidentificação para o controle autônomo de vibrações em sistemas rotativos / Self-identification algorithm for the autonomous control of vibrations in rotating systems
Vibrações são intrínsecas às máquinas rotativas e, embora não possam ser completamente eliminadas, devem ser controladas de modo a se evitar fadiga e até mesmo falha da máquina. Neste contexto, devido à sua capacidade de alterar as características dinâmicas destas máquinas, os mancais ativos são uma solução efetiva a fim de se reduzir vibraç
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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2. Modelling hermetic compressors using different constraint equations to accommodate multibody dynamics and hydrodynamic lubrication
In this work, the steps involved for the modelling of a reciprocating linear compressor are described in detail. The dynamics of the mechanical components are described with the help of multibody dynamics (rigid components) and finite elements method (flexible components). Some of the mechanical elements are supported by fluid film bearings, where the hydrod
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03
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3. Lateral dynamics and stability analysis of a gas compressor supported by hybrid and active lubricated multirecess journal bearing
Fluid film forces are generated in multirecess journal bearings by two types of lubrication mechanism: the hydrostatic lubrication in the bearing recesses and hydrodynamic lubrication in the bearing lands, when operating in rotation. The combination of both lubrication mechanism leads to hybrid journal bearings (HJB). When part of hydrostatic pressure is als
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-12
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4. Fault diagnosis in a rotor supported by active magnetic bearings / Detecção de falhas em rotores sustentados por mancais magneticos ativos
This work applies the methodology of fault diagnosis in rotating machinery supported by active magnetic bearings and active con1rol systems, excited by unbalance and white noise. This diagnostic applies the correlation matrices based on the Ljapunov matrix formulation and artificial neural network for linear stationary systems. The procedure uses only measur
Publicado em: 2006
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5. Feasibility of influencing the dynamic fluid film coefficients of a multirecess journal bearing by means of active hybrid lubrication
The main objective of this research project is the investigation of multirecess hydrostatic journal bearings with active hybrid (hydrostatic and hydrodynamic) lubrication. This paper gives a theoretical contribution to the modeling of this kind of bearing, combining computational fluid dynamics and control techniques. The feasibility of influencing the dynam
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-04
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6. Lubrificação ativa aplicada a mancais hibridos radiais
The stability of rotating systems supported by multirecess hydrostatic journal bearings is closely reIated to the dynamic characteristics of the bearing lubricant fluid film. The instability problems arise with the increase of the machine rotational speed, due to the bearing damping reduction and the increase of the joW Ilal cross coupling effect. An increas
Publicado em: 2003
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7. Identificação das propriedades dinamicas de mancais segmentados hibridos : teoria e experimento
The stability of rotating machines is strongly related to the type of coupling between the rotating and stationary parts. The bearings are one of the most important stationary part for defining the operational stability range of such a kind of machines. The goal of this research work is to study a new type of hydrid lubrication, where the oil is electro nica
Publicado em: 1999