نتایج جستجو برای: bearing damping

تعداد نتایج: 96944  

Journal: :Journal of Mechanics 2022

Abstract The rotor system supported by the cylindrical roller bearings is widely used in various fields, such as aviation, space and machinery due to its importance. In study of analysis vibration characteristics system, it important accurately calculate stiffness damping bearings. Therefore, this paper, dynamic simple rotor-bearing were analyzed based on new model considering comprehensive bea...

2006
T. Waumans P. Vleugels J. Peirs F. Al-Bender D. Reynaerts

Current trends in micro-turbomachinery stress the need for adequate rotordynamic models. These models should allow accurate prediction of critical speeds, imbalance response and stable operation range of microturbomachinery rotor-bearing systems. This paper gives an overview of the total rotordynamic modelling process of a micro-turbine rotor supported on aerostatic bearings. A both accurate an...

2015

Abstract—In this paper, the dynamic characteristics of a threelobe journal bearing lubricated with micropolar fluids are determined by the linear stability theory. Lubricating oil containing additives and contaminants is modelled as micropolar fluid. The modified Reynolds equation is obtained using the micropolar lubrication theory .The finite difference technique has been used to determine the...

2002
H. G. Tillema

The demand for silent bearing applications has resulted in the development of an effective damping layer between the outer ring of a rolling bearing and the surrounding structure. By means of numerical modeling using both FEM and BEM techniques an induction motor for household appliances is analyzed. A hybrid modeling approach combining measured structural velocities with a BEM formulation is u...

Journal: :Applied sciences 2021

Often the input values used in mathematical models for rolling bearings are a wide range, i.e., very small of deformation and damping confronted with big stiffness governing equations, which leads to miscalculations. This paper presents two degrees freedom (2-DOF) dimensionless model ball describing procedure, helps scale problem reveal relationships between terms their influence on system’s re...

2014
H. Hattori N. Kawashima

A rotor-journal bearing system for a twin rotary compressor has been nlliDerically analyzed to estimate the reliability and to optimize the bearing design. For rotary compressors, large dynamic loads act on the rotor. They are unbalanced forces due to eccentric rotation parts and gas forces induced by the difference in pressure between compression and suction gases. In such a case, the rotor-jo...

1998
J. A. Wensing Jeroen Anton Wensing

This investigation on the dynamic behaviour of ball bearings was motivated by the demand for silent bearings in noise-sensitive applications, especially in the household appliance and automotive industry. The present investigations are intended to provide a clear understanding of the role of the bearing in the application with respect to its design, its quality and the way in which it is mounte...

Journal: :JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry 1989

2006
Ilmar F. Santos Flávio Y. Watanabe

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 also dynamically modified by means of hy...

2007

 provision of large, stress-bearing area  excellent fatigue strength  good shock absorption  reduced galvanic corrosion  no need to have access to far-side of adherend to make joint  bonding is possible on dissimilar materials  provision of smooth contours and sections around joint areas  sealing  improved damping which increases structural stiffness  reduction in distortion and metal...

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