scholarly journals Study on the Load Distribution and Dynamic Characteristics of a Thin-Walled Integrated Squirrel-Cage Supporting Roller Bearing

2016 ◽  
Vol 6 (12) ◽  
pp. 415
Author(s):  
Yuze Mao ◽  
Liqin Wang ◽  
Chuanwei Zhang
Keyword(s):  
Dynamic Characteristics ◽  
Load Distribution ◽  
Roller Bearing ◽  
Squirrel Cage ◽  
Supporting Roller ◽  
Thin Walled

Fatigue Life Prediction for Large-Diameter Elastically Constrained Ball Bearings

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Jerzy T. Sawicki ◽  
Samuel A. Johansson ◽  
John H. Rumbarger ◽  
Ronald B. Sharpless
Keyword(s):  
Fatigue Life ◽  
Load Distribution ◽  
Life Prediction ◽  
Large Diameter ◽  
Roller Bearing ◽  
Fatigue Life Prediction ◽  
Design Criteria ◽  
Standard Design ◽  
Critical Components ◽  
Bearing Rings

The application of large-diameter bearing rings and the thereof inherited low stiffness make them susceptible to local distortions caused by their surrounding structures, which are often under heavy loads. The standard accepted design criteria for these bearings are based on the estimation of the internal load distribution of the bearing, under the assumption of rigid circular and flat supporting structures, that keep the bearing inner and outer races in circular, flat, i.e., not deformed shapes. However, in the presence of structural distortions, the element load distribution can be severely altered and cannot be predicted via the standard design criteria. Therefore, the application of large-diameter ball and roller bearing rings as the critical components in rotating machines becomes more of a design task than making a catalog selection. The analytical and finite element approach for fatigue life prediction of such a bearing application is presented. The undertaken approach and the results are illustrated based on the analysis and fatigue life simulation of the computed tomography scanner’s main rotor bearing. It has been demonstrated that flexibility of the rings can significantly reduce the fatigue life of the ball bearing.

Investigation of Static and Dynamic Characteristics of Complex Thin-Walled Shell Structure with Cracks

2016 ◽  
Vol 48 (3) ◽  
pp. 401-410
Author(s):  
O. O. Luk’yanchenko ◽  
O. V. Kostina ◽  
N. I. Bouraou ◽  
O. V. Kuz’ko
Keyword(s):  
Dynamic Characteristics ◽  
Shell Structure ◽  
Static And Dynamic Characteristics ◽  
Thin Walled

Influence Characteristics of Fluid Film Bearing’s Displacement-Load on Rotating Vibration of Rotor System

2015 ◽  
Vol 727-728 ◽  
pp. 567-571
Author(s):  
Xi Chen Lin ◽  
Rui Ping Zhou ◽  
Neng Qi Xiao
Keyword(s):  
Mathematical Model ◽  
Numerical Integration ◽  
Dynamic Characteristics ◽  
Load Distribution ◽  
High Load ◽  
Rotor System ◽  
Vibration Response ◽  
Fluid Film ◽  
Load Carrying

In high load-carrying bearing-rotor system, bearings’ places usually change for load distribution or in continual work. It influences the system’s stability, and brings out different vibration response in rotor system. This article puts forward mathematical model of bearing’s stiffness under load which is calculated from bearing displacement. Then through numerical integration it studies system’s rotating vibration with different bearing settings. The results of the analysis show that bearing displacement has a great effect on dynamic characteristics of the bearing-rotor system.

scholarly journals TECHNOLOGICAL FIXTURES FOR MACHINING LARGE-SIZED THIN-WALLED SHELLS OF COMPLEX PROFILE

2021 ◽  
pp. 28-41
Author(s):  
Svitlana Oliinyk ◽  
Lydmila Kalafatova
Keyword(s):  
Dynamic Stability ◽  
Frequency Spectrum ◽  
Dynamic Characteristics ◽  
Technological System ◽  
Complex Profile ◽  
Study Results ◽  
Thin Walled ◽  
Grinding System

The paper analyzes the structure of technological fixtures for the positioning and fixing of large-sized thin-walled pyroceram shells as a factor affecting the dynamic characteristics of the grinding system. The solution to the problem of ensuring the dynamic stability of the «mandrel-workpiece» subsystem is necessary to increase the efficiency of shell machining in present conditions. Studying the vibrations frequency spectrum of the technological system during grinding has made it possible to determine their sources. The magnitude and frequency of vibrations depend on the mandrel structure - the clamping fixture. The study results are the requirements for a new mandrel structure, considering the dynamic stability of the technological system.

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