scholarly journals Increasing the bearing capacity of the lubricating layer of thrust gas bearings

2019 ◽  
Vol 41 (4) ◽  
Author(s):  
Alexey Kurenskii ◽  
Anatolii Samsonov ◽  
Sergei Solovyov ◽  
Andrei Bondarenko
Keyword(s):  
Bearing Capacity ◽  
Gas Bearings ◽  
Lubricating Layer

scholarly journals DIAGNOSTICS OF ROLLING EQUIPMENT SLIDING BEARINGS

2021 ◽  
pp. 20-26
Author(s):  
Anatoly Gaydamaka ◽  
Yuri Yuri ◽  
Dmytro Borodin ◽  
Il'ya Verba ◽  
Sergіj Krigіn ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Technical Condition ◽  
General Purpose ◽  
Electric Machines ◽  
Sliding Bearings ◽  
Rolling Mills ◽  
Rolling Equipment ◽  
Consulting Services ◽  
Indirect Control ◽  
Lubricating Layer

Peculiarities of rolling bearings operation are analyzed. Methods of diagnostics of general purpose sliding bearings and rolling equipment are considered. Direct control of the maximum allowable wear of plain bearings during operation is proposed. It is advisable to provide remote information and consulting services to technical services of metallurgical enterprises for maintenance, repair and operation of crankshaft bearings. Bearings of electric machines of drives of rolls of rolling mills work in extremely difficult conditions with considerable overloads in the environment of the increased vibration. This leads to premature wear of the liner and its fatigue failure. The technical condition of bearings of electric machines of drives of rolls of rolling mills for the purpose of an exception of an emergency stop of production is carried out by indirect control of temperature and vibration. However, these controls do not guarantee an avoidance of an emergency. All problems with working plain bearings can be grouped into three groups: insufficient bearing capacity of the lubricating layer, unregulated clearance between the shaft and the liner, unsatisfactory technical condition of the bearing surfaces. Insufficient bearing capacity of the lubricating layer is more often associated with loss of lubricant properties due to improper maintenance of the lubrication system. The discrepancy between the size of the gap between the shaft and the liner to the normalized value arises from design, technological and operational reasons. Key words: plain bearing; failure; rolling equipment; direct wear control; remote information and consulting services

scholarly journals Research on dynamic characteristics of gas film of spherical hybrid gas bearings based on computational fluid dynamics

2020 ◽  
Vol 44 (1) ◽  
pp. 23-37
Author(s):  
Chenhui Jia ◽  
Zhiwu Cui ◽  
Shijun Guo ◽  
Wensuo Ma
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Bearing Capacity ◽  
Dynamic Characteristic ◽  
Dynamic Characteristics ◽  
Gas Flow ◽  
Static Pressure ◽  
Gas Bearings ◽  
Gas Bearing

A realizable k–ε turbulence model for spherical spiral groove hybrid gas bearing films was established based on computational fluid dynamics (CFD). A six degrees of freedom passive grid was used to calculate the gas film pressure distribution, bearing capacity, and dynamic characteristic coefficients numerically. The gas flow field dynamic and static pressure coupling mechanism was studied. The effects of the rotation speed, gas film thickness eccentricity ratio, and gas supply pressure on the dynamic and static pressure bearing capacity, and dynamic characteristic coefficients during operation were analyzed as a method of research into the mechanical mechanisms of gas bearing stability. The CFD calculation analysis can simulate the complex gas flow in the transient flow field of the gas film and determine reasonable operation parameters to optimize the dynamic and static pressure coupling effects, which can improve the gas film bearing capacity, dynamic characteristics, and operational stability of gas bearings.

Determination of Bearing Capacity of Cleared and Graded Areas at Airports

2021 ◽  
Vol 147 (1) ◽  
pp. 04020086
Author(s):  
Vittorio Ranieri ◽  
Nicola Berloco ◽  
Donato D’Auria ◽  
Vincenzo Disalvo ◽  
Veronica Fedele ◽  
...  
Keyword(s):  
Bearing Capacity

Improvement of Bearing Capacity of Soil using Bamboo and Geosynthetics

2017 ◽  
Vol 5 (4) ◽  
pp. 17
Author(s):  
Mamatha M. ◽  
Kommu Suresh ◽  
◽  
Keyword(s):  
Bearing Capacity

Effect of Pile and Load Inclination on the Pile Resistance In both Compression and Tension

2014 ◽  
Vol 2 (1) ◽  
pp. 11-29
Author(s):  
Ahmad Jabber Hussain ◽  
Alaa Dawood Salman ◽  
. Nazar Hassan Mohammad
Keyword(s):  
Bearing Capacity ◽  
Inclination Angle ◽  
Theoretical Study ◽  
Pile Installation ◽  
Soil Failure ◽  
Inclined Pile ◽  
Uplift Resistance ◽  
Lift Forces ◽  
Batter Piles ◽  
Pile Resistance

      According to this theoretical study which was about loading of piles under different condition of loading (compression and up-lift forces ) and for deferent pile installation (vertical and inclined pile ) by which it called (positive batter pile ) when the inclination of the load and pile is in the same direction and called (negative batter pile) when the inclination of load is opposite to the pile inclination, and from studying these cases the results of analysis can be summarize in the flowing points: 1-Variation of load inclination on piles effects on the bearing capacity and uplift resistance. It was found that bearing capacity of the piles increase with increasing of load inclination up to the inclination angle (37.5ͦ) which represents the maximum bearing capacity and then the bearing capacity decrease with increasing of load inclination. 2- Variation of batter pile affects the bearing capacity of the pile and up-lift resistance. by which equivalent angle will be used as result between the load and piles inclination and this angle will be used in calculation of piles resistance . 3- It was noticed the shape of soil failure is highly affected by the inclination of pile. The shape of failure for the soil which is in contact with pile and this include (vertical and batter piles) is highly affected by the angle of inclination.

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