Temperature rise of double-row tapered roller bearings analyzed with the thermal network method

2015 ◽  
Vol 87 ◽  
pp. 11-22 ◽  
Author(s):  
Siyuan Ai ◽  
Wenzhong Wang ◽  
Yunlong Wang ◽  
Ziqiang Zhao
Keyword(s):  
Temperature Rise ◽  
Double Row ◽  
Thermal Network ◽  
Roller Bearings ◽  
Network Method ◽  
Tapered Roller ◽  
Tapered Roller Bearings ◽  
Thermal Network Method

scholarly journals Constructing fast and representative analytical models of wind turbine main bearings

2021 ◽  
Vol 6 (1) ◽  
pp. 15-31
Author(s):  
James Stirling ◽  
Edward Hart ◽  
Abbas Kazemi Amiri
Keyword(s):  
Wind Turbine ◽  
Analytical Model ◽  
3D Models ◽  
Analytical Models ◽  
Main Bearing ◽  
Double Row ◽  
Roller Bearings ◽  
Tapered Roller ◽  
Tapered Roller Bearings ◽  
The Moment

Abstract. This paper considers the modelling of wind turbine main bearings using analytical models. The validity of simplified analytical representations used in existing work is explored by comparing main-bearing force reactions with those obtained from higher-fidelity 3D finite-element models. Results indicate that there is good agreement between the analytical and 3D models in the case of a non-moment-reacting support (such as for double-row spherical roller bearings), but the same does not hold in the moment-reacting case (such as for double-row tapered roller bearings). Therefore, a new analytical model is developed in which moment reactions at the main bearing are captured through the addition of torsional springs. This latter model is shown to significantly improve the agreement between analytical and 3D models in the moment-reacting case. The new analytical model is then used to investigate load characteristics, in terms of forces and moments, for this type of main bearing across different operating points and wind conditions.

scholarly journals Ageing of Aluminum Power Connectors Based on Current Cycle Test

2019 ◽  
Vol 4 (1) ◽  
pp. 110-114 ◽  
Author(s):  
Ghareeb Moustafa
Keyword(s):  
Contact Resistance ◽  
Temperature Rise ◽  
Operating Conditions ◽  
Heat Sources ◽  
Thermal Network ◽  
Network Method ◽  
Current Cycle ◽  
Thermal Network Method ◽  
Lower Temperature ◽  
A Current

The effect of current cycle on the behavior of contact resistance of clamped connectors was investigated experimentally to characterize the thermal behavior of the used clamped connector and optimizing the installation procedure in order to reduce contact resistance and ensure a lower temperature during normal operating conditions. The thermal network method is used for calculating the temperature rise of the connector when loaded by a current. The method is based on substitution of the connector geometry by a circuit consisting of thermal resistances, capacitance and heat sources. The temperature rise is determined using the network simulation program PSPICE with the corresponding thermal model libraries. The validity of the obtained results has been checked by comparing the computed values with those measured experimentally. The agreement was found satisfactory

scholarly journals On the Measurement of Roller Skew of Tapered Roller Bearings

2012 ◽  
Vol 217-219 ◽  
pp. 2328-2331 ◽  
Author(s):  
Abiodun Falodi ◽  
Yong K. Chen ◽  
Martin Caspall ◽  
Brian Earthrowl ◽  
David Dell
Keyword(s):  
Roller Bearing ◽  
Radial Load ◽  
Double Row ◽  
Tapered Roller Bearing ◽  
Roller Bearings ◽  
Variable Reluctance ◽  
Bearing Life ◽  
Tapered Roller ◽  
Tapered Roller Bearings ◽  
New System

Roller skew in roller bearings can cause heat generation and reduce bearing life. Therefore, design to minimise its occurrence is essential in bearing development. This study investigated the roller skew of a double row tapered roller bearing under various running conditions. A new system of measurement using two differential variable reluctance transducers (DVRT) was developed. It is evident that the roller skew of the double row tapered roller bearing can be measured. The shaft rotational speed has a significant effect on roller skew but the radial load has little effect.

Application of a Thermal Network Method to Thermal Analysis of Electronic Devices Using Phase Change Materials

2009 ◽  
Author(s):  
Sadakazu Takakuwa ◽  
Masaru Ishizuka ◽  
Shinji Nakagawa ◽  
Kanji Takagi
Keyword(s):  
Phase Change ◽  
Temperature Rise ◽  
Phase Change Materials ◽  
Heat Dissipation ◽  
Design Parameters ◽  
Transient Temperature ◽  
Thermal Network ◽  
Network Method ◽  
Pin Fins ◽  
Thermal Network Method

This paper describes transient cooling technology for electronic equipment using Phase Change Materials (PCMs) and a heat sink with pin fins. We designed an electronic module including paraffin as the PCM and measured its transient temperature rise. The effects of the diameter of pin fins and heat dissipation values were investigated as design parameters. The results show that the temperature rise values were controlled by the thermal absorption effect due to the latent heat of the PCM. It is also confirmed that the proposed thermal network method with an equivalent specific heat model has strong potential for use in the analysis of electronic modules using PCMs.

scholarly journals Effect of internal clearance on rolling element load of double row tapered roller bearings

2016 ◽  
Vol 82 (840) ◽  
pp. 16-00205-16-00205 ◽  
Author(s):  
Ken TAKAHASHI ◽  
Daisuke SUZUKI ◽  
Takafumi NAGATOMO
Keyword(s):  
Double Row ◽  
Roller Bearings ◽  
Rolling Element ◽  
Tapered Roller ◽  
Tapered Roller Bearings

Finite Element Analysis on Convexity for Tapered Roller with Arc-Line Modification Profile

2012 ◽  
Vol 591-593 ◽  
pp. 569-572
Author(s):  
Le Yi Zhang ◽  
Yu Jun Xue ◽  
Ji Shun Li ◽  
Wei Ma
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Concentration ◽  
Optimal Range ◽  
Double Row ◽  
Element Analysis ◽  
Roller Bearings ◽  
Margin Of Error ◽  
Tapered Roller ◽  
Tapered Roller Bearings

Taking double-row tapered roller bearings of a rail passenger coach as research object, the analysis on convexity for tapered roller bearings has been carried out. The comparison of contact stresses at different convexity values with the ANSYS has been done, the optimal range of convexity value under a certain load has been obtained. The results show that the reasonably design of convexity can avoid or reduce the border contact stress concentration occurred between rollers and inner, outer ring raceways under certain condition. But the approximate theoretic convexity and the results obtained by Finite element analysis have a certain margin of error.

Sign in / Sign up

Export Citation Format

Share Document