High Speed Cylindrical Rolling Element Bearing Analysis “CYBEAN”—Analytic Formulation

1980 ◽  
Vol 102 (3) ◽  
pp. 380-388 ◽  
Author(s):  
R. J. Kleckner ◽  
J. Pirvics ◽  
V. Castelli
Keyword(s):  
Steady State ◽  
High Speed ◽  
Transient Simulation ◽  
Rolling Element Bearing ◽  
Variable Geometry ◽  
Sample Problem ◽  
Rolling Element ◽  
Element Bearing ◽  
Bearing Behavior ◽  
Bearing Analysis

This paper documents the analytic foundation and software architecture for the computerized mathematical simulation of high speed cylindrical rolling element bearing behavior. The software, CYBEAN (CYlindrical BEaring ANalysis), considers a flexible, variable geometry outer ring, EHD films, roller centrifugal and quasidynamic loads, roller tilt and skew, mounting fits, cage and flange interactions. The representation includes both steady state and time transient simulation of thermal interactions internal to and coupled with the surroundings of the bearing. A sample problem illustrating program use is presented.

scholarly journals Fatigue Life of High-Speed Ball Bearings With Silicon Nitride Balls

1975 ◽  
Vol 97 (3) ◽  
pp. 350-355 ◽  
Author(s):  
R. J. Parker ◽  
E. V. Zaretsky
Keyword(s):  
Fatigue Life ◽  
Silicon Nitride ◽  
High Speed ◽  
Bearing Steel ◽  
Rolling Element Bearing ◽  
Ball Bearings ◽  
Rolling Element ◽  
Low Mass ◽  
Element Bearing ◽  
Steel Balls

Hot-pressed silicon nitride was evaluated as a rolling-element bearing material. This material has a low specific gravity (41 percent that of bearing steel) and has a potential application as low mass balls for very high-speed ball bearings. The five-ball fatigue tester was used to test 12.7-mm- (0.500-in-) dia silicon nitride balls at maximum Hertz stresses ranging from 4.27 × 109 N/m2 (620,000 psi) to 6.21 × 109 N/m2 (900,000 psi) at a race temperature of 328K (130 deg F). The fatigue life of NC-132 hot-pressed silicon nitride was found to be equal to typical bearing steels and much greater than other ceramic or cermet materials at the same stress levels. A digital computer program was used to predict the fatigue life of 120-mm- bore angular-contact ball bearings containing either steel or silicon nitride balls. The analysis indicates that there is no improvement in the lives of bearings of the same geometry operating at DN values from 2 to 4 million where silicon nitride balls are used in place of steel balls.

Transmissibility Study of a Flexibly Mounted Rolling Element Bearing in a Porous Bearing Squeeze-Film Damper

1977 ◽  
Vol 99 (1) ◽  
pp. 50-56 ◽  
Author(s):  
C. Cusano ◽  
P. E. Funk
Keyword(s):  
Steady State ◽  
Wall Thickness ◽  
Rolling Element Bearing ◽  
Squeeze Film ◽  
State Data ◽  
Squeeze Film Damper ◽  
Porous Bearing ◽  
Rolling Element ◽  
Element Bearing ◽  
Transient And Steady State

The purpose of this investigation is to study the transmissibility characteristics of a centrally preloaded porous bearing squeeze-film damper supporting a rolling element bearing. Using the short-bearing approximation and isothermal, incompressible lubrication, transient and steady-state data are presented which show that, for the range of parameters considered, porous bearing dampers exhibit superior transmissibility characteristics over equivalent dampers using solid bearings. The data presented are for squeeze-film porous bearings having a wall thickness-to-length ratio of 0.1 and three degrees of permeability, including the case of zero permeability which corresponds to a solid bearing.

Thermomecanical study of high speed rolling element bearing: A simplified approach

2017 ◽  
Vol 233 (4) ◽  
pp. 541-552 ◽  
Author(s):  
D Niel ◽  
C Changenet ◽  
F Ville ◽  
M Octrue
Keyword(s):  
High Speed ◽  
Input Data ◽  
Rolling Element Bearing ◽  
Mechanical Transmission ◽  
Angular Contact Ball Bearing ◽  
Intermediate Model ◽  
Simplified Approach ◽  
Thermal Network ◽  
Rolling Element ◽  
Element Bearing

Rolling element bearing is an essential component in mechanical transmission because it reduces friction between two rotating parts. Two main approaches to evaluate power losses are proposed in literature: (i) global engineering models using few input data; (ii) local models which are more accurate but need much more information on rolling element bearing geometry. Based on thermal network approach, an intermediate model is developed in this study. This new model allows obtaining lumped information (temperature of rings) with a minimum of input data (external geometry only) and by using global power loss models. This intermediate model is developed for angular contact ball bearing under oil jet lubrication for high speed application. Thermal network results are compared with experimental findings.

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