Rigid-flexible coupled dynamic simulation of aeroengine main-shaft high speed cylindrical roller bearing

2010 ◽  
Author(s):  
Hai-sheng Yang ◽  
Guo-ding Chen ◽  
Si-er Deng ◽  
Shang Li
Keyword(s):  
Dynamic Simulation ◽  
High Speed ◽  
Roller Bearing ◽  
Main Shaft ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

Skidding research of a high-speed cylindrical roller bearing with beveled cage pockets

2020 ◽  
Vol 72 (7) ◽  
pp. 969-976
Author(s):  
Yanbin Liu ◽  
Zhanli Zhang
Keyword(s):  
Peer Review ◽  
Tilt Angle ◽  
High Speed ◽  
Hydrodynamic Lubrication ◽  
Roller Bearing ◽  
Front Wall ◽  
Dynamics Model ◽  
Content Type ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

Purpose This study aims to uncover the influencing mechanism of the tilt angles of the cage pocket walls of the high-speed cylindrical roller bearing on the bearing skidding. Design/methodology/approach A novel cylindrical roller bearing with the beveled cage pockets was proposed. Using the Hertz contact theory and the elastohydrodynamic and hydrodynamic lubrication formulas, the contact models of the bearing were built. Using the multibody kinematics and the Newton–Euler dynamics theory, a dynamics model of the bearing was established. Using the Runge–Kutta integration method, the dynamics simulations and analysis of the bearing were performed. Findings The simulation results show that the effects of the tilt angles of the front and rear walls of the pocket on the bearing skidding are remarkable. Under a 5° tilt angle of the front wall of the pocket and a 10° tilt angle of the rear wall, the bearing skidding can be effectively decreased in the rotational speed range of 10,000-70,000 r/min. Originality/value In this paper, a novel cylindrical roller bearing with the beveled cage pockets was proposed; a dynamics model of the bearing was established; the influence mechanism of the tilt angles of the front and rear walls of the pocket on the bearing skidding was investigated, which can provide fundamental theory basis for optimizing the pocket. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2020-0035/

scholarly journals Experimental Study on the Skidding Damage of a Cylindrical Roller Bearing

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4075 ◽  
Author(s):  
Qing Zhang ◽  
Jun Luo ◽  
Xiang-yu Xie ◽  
Jin Xu ◽  
Zhen-huan Ye
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Failure Modes ◽  
Roller Bearing ◽  
Weight Ratio ◽  
Operating Conditions ◽  
Roller Bearings ◽  
Light Load ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

As large-scale rotating machines develop toward high rotating speed and high power–weight ratio, skidding damage has become one of the major initial failure modes of cylindrical roller bearings. Therefore, understanding the skidding damage law is an effective way to ensure the safety of machines supported by cylindrical roller bearings. To realize the skidding damage, a high-speed rolling bearing test rig that can simulate the actual operating conditions of aviation bearings was used in this paper, and the skidding damage dynamic behaviors of cylindrical roller bearings were investigated. In addition, to ensure the accuracy of the obtained skidding damage mechanism, the cylindrical roller bearing was carefully inspected by microscopic analysis when the skidding damage occurred. Out results show that instantaneous increases in friction torque, vibration acceleration, and temperature are clearly observed when the skidding damage occurs in the cylindrical roller bearing. Furthermore, under the conditions of inadequate lubrication and light load, the critical speed of skidding damage is rather low. The major wear mechanisms of skidding damage include oxidation wear, abrasive wear, and delamination wear. The white layers are found locally in the inner ring and rollers under the actions of friction heat and shear force.

Flange Loads Measurements in a Cylindrical Roller Bearing

1982 ◽  
Vol 104 (3) ◽  
pp. 321-325
Author(s):  
T. A. Dow ◽  
J. W. Kannel
Keyword(s):  
Roller Bearing ◽  
Mineral Oil ◽  
Experimental Measurements ◽  
Main Shaft ◽  
Light Mineral ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

A method of measuring the forces between a roller and the guide flange in a turbine main shaft bearing has been developed. Experimental measurements of these forces were made for a nonpreloaded bearing with nominally balanced rollers and also intentionally unbalanced rollers. The bearing was radially loaded and measurements of the flange forces were made with the rollers, both in and out of the loaded region. Two different lubricants were studied, and significantly different flange forces were measured as a result of the change in viscosity. Using a MIL-L-23699 lubricant, edge loads in the range of 70–90 N (15–20 lb) were measured for both the balanced and the unbalanced rollers. However, when a light mineral oil (kerosene) was substituted for the higher viscosity military oil, higher edge loads (110–135 N) were measured for the unbalanced roller, but the end forces were reduced for the balanced roller.

Analysis of High-Speed Intershaft Cylindrical Roller Bearing with Flexible Rings

2005 ◽  
Vol 48 (2) ◽  
pp. 154-164 ◽  
Author(s):  
Gabriel CAVALLARO ◽  
Daniel NELIAS ◽  
Florence BON
Keyword(s):  
High Speed ◽  
Roller Bearing ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller
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