Determination of Machinery Vibration in Radial Sliding Bearings with Integrated Liquid Dampers

2021 ◽  
pp. 102-108
Author(s):  
Aleksandr Kiryukhin
Keyword(s):  
Sliding Bearings ◽  
Liquid Dampers

Contributions to the Determination of the Real Clearance in Sliding Bearings

1965 ◽  
Vol 87 (3) ◽  
pp. 781-784 ◽  
Author(s):  
Al. Nica
Keyword(s):  
Temperature Distribution ◽  
Elastic Properties ◽  
Thermal Regime ◽  
Calculation Method ◽  
Radial Clearance ◽  
Sliding Bearings ◽  
The Real

When the bearing is running, its clearance is no longer equal to the initial one, as a result of the thermal regime and load. This paper presents a calculation method which takes into consideration the temperature distribution in the bearing, the load, and the elastic properties of the materials. The deduced calculus relations allow to establish the correction of the initial radial clearance in order to obtain the designed clearance when the bearing is running.

scholarly journals Stabilization of vibrations of rotary machines in radial sliding bearings with integrated liquid

2018 ◽  
Vol 224 ◽  
pp. 02043
Author(s):  
Aleksandr Kiryukhin
Keyword(s):  
Viscous Friction ◽  
Dynamical Analysis ◽  
Sliding Bearings ◽  
Friction Forces ◽  
Operating Modes ◽  
Flow Parameters ◽  
Complex Approach ◽  
Lubricant Flow ◽  
Rotary Machines ◽  
Liquid Dampers

The use of radial bearings with segments on a self-generated hydrostatic suspension has been substantiated in order to satisfy the requirements for precision positioning of axes and efficiency of stabilization of shaft oscillations of power-consuming rotary machines. The methods of turbomachine dynamical analysis based on the modelling of the viscous friction forces process and inertia in lubricating films that balance the harmonic loads on the shaft by redistributing the lubricant flow parameters in the bearing gaps with integrated liquid dampers have been further developed. The complex approach for improving functional properties of turbomachine supporting block on the basis of multicriteria optimization of hydraulic tracts parameters and lubrication system operating modes is presented.

Effect of Hydrodynamic Thrust Bearings on Lateral Shaft Vibrations

1991 ◽  
Vol 113 (4) ◽  
pp. 811-817 ◽  
Author(s):  
N. Mittwollen ◽  
T. Hegel ◽  
J. Glienicke
Keyword(s):  
High Speed ◽  
High Surface ◽  
Considerable Effect ◽  
Computational Method ◽  
Sliding Bearings ◽  
Thrust Bearings ◽  
Lateral Vibrations ◽  
Tilting Pad ◽  
Convenient Model

A computational method for the prediction of static and dynamic characteristic data of tilting pad and fixed pad thrust bearings for high surface velocities and high thermal loads is developed and verified. Furthermore, a convenient model is presented, which allows the determination of the dynamic coefficients for the gyrating movement of the thrust collar, where it is sufficient using the purely axial dynamic single pad coefficients only. Introducing these coefficients into an accordingly modified rotor dynamics program, the lateral vibrations of a high speed rotor with sliding bearings are calculated and a considerable effect of the thrust bearings is shown. These theoretical results are also verified experimentally through vibration measurements at a high speed rotor test rig.

scholarly journals USING EFFECT CATALOGUES FOR THE DESIGN OF SENSING MACHINE ELEMENTS – METHOD AND EXEMPLARY APPLICATION

2021 ◽  
Vol 1 ◽  
pp. 3359-3368
Author(s):  
André Harder ◽  
Hans Joachim; Gross ◽  
Gunnar Vorwerk-Handing ◽  
Eckhard Kirchner
Keyword(s):  
Sensory Function ◽  
Capacity Measurement ◽  
Sliding Bearings ◽  
Indirect Measurements ◽  
Monitoring Process ◽  
Machine Elements ◽  
Systematic Development ◽  
Useful Lifetime

AbstractClose to process measuring improves the data quality of a condition monitoring process. A possibility to access such measurements comes with the addition of a sensory function in machine elements. For a systematic development of sensing machine elements, an approach is presented for the identification of possible measurands to determine a variable of interest. Based on a modelling of physical causeeffect- relationships by using an effect matrix and an effect catalogue it allows to consider both direct and indirect measurements for the determination of measurands in technical systems.The presented approach is initially applied to develop a sensory solution for self-lubricated fibrecomposite sliding bearings. The aim is to measure a variable of interest that can give a conclusion about the estimated remaining useful lifetime. The development process is described and possible solutions for measurement concepts are presented. The electrical capacity measurement, evaluated as the most promising concept, is described in detail and experimental results are presented.These results show the applicability of the sensory concept and therefore, the benefits of the presented approach.

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

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