Results 31 to 40 of about 131,767 (349)
On the Instability Threshold of Journal Bearing Supported Rotors
International Journal of Rotating Machinery, 2014 Journal bearing supported rotors present two kinds of self-excited vibrations: oil-whirl and oil-whip. The first one is commonly masked by the rotor unbalance, hence being rarely associated with instability problems.
Ricardo Ugliara Mendes +1 more
doaj +1 more source
Active Magnetic Bearing Online Levitation Recovery through μ-Synthesis Robust Control
Actuators, 2017 A rotor supported on active magnetic bearings (AMBs) is levitated inside an air gap by electromagnets controlled in feedback. In the event of momentary loss of levitation due to an acute exogenous disturbance or external fault, reestablishing levitation ...
Alexander H. Pesch, Jerzy T. Sawicki
doaj +1 more source
Reliability-Based Design Optimization Applied to a Rotor Supported by Hydrodynamic Bearings
MachinesRotating machines are an important part of industrial equipment. It is essential to improve their performance while reducing the manufacturing, operating, and maintenance costs.
Helio Fiori de Castro +2 more
doaj +1 more source
Panel Discussion on Inducer Design Criteria [PDF]
, 2003 This article reports a panel discussion titled Inducer Design Criteria presented at the 9th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-9).
Acosta, Allan J. +2 more
core +3 more sources
Sensors, 2013 Timely and accurate condition monitoring and fault diagnosis of rotating machinery are very important to maintain a high degree of availability, reliability and operational safety.
Zhongjie Shen +3 more
doaj +1 more source
Dynamic Absorbers for Rotating Machinery
, 2015 Dynamic absorbers are simple passive devices installed on mechanical systems to absorb and dissipate kinetic energy, thus reducing the amplitude of vibrations/oscillations. The most widely spread typologies of dynamic absorbers belong either to the family of the Tuned Mass Dampers (TMD) and Tuneable Liquid Column Dampers (TLCD).
BORGHESANI, PIETRO +3 more
openaire +3 more sources
Calculation of Rotor Dynamic Coefficients for Labyrinth Seals
International Journal of Rotating Machinery, 1998 A single control volume, Iwatsubo based bulk flow method for the calculation of these coefficients is developed and implemented. The method herein uses a unique iterative technique to first identify the mass flow rate based on pressure drops across the ...
B. P. Williams, R. D. Flack
doaj +1 more source
Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source
Targeting TNBC: core–shell polycationic polyurea dendrimers with inherent anticancer activity
FEBS Open Bio, EarlyView.Core–shell polycationic PURE dendrimers were tested in TNBC‐derived tumor models. Both formulations selectively targeted TNBC and effectively reduced tumor volume. PUREG4‐OEI48 suppressed tumor growth without detectable toxicity, whereas PUREG4‐OCEI24, despite showing efficacy, induced hepatic toxicity.
Adriana Cruz +9 more
wiley +1 more source
Prediction of windage power loss in alternators [PDF]
, 1971 Simplified equations and constants, based on laminar and turbulent flow theory between parallel plates, estimate windage loss in rotating electrical machinery.
Vrancik, J. E.
core +1 more source