The numerical analysis of the radial sleeve bearing with combined surface slip

• Published in: Tribology international 2012-03, Vol.47, p.100-104
• Main Authors: Wang, Li-li, Lu, Chang-hou, Wang, Min, Fu, Wen-xin
• Format: Article
• Language: English
• Subjects: Applied sciences; Bearings, bushings, rolling bearings; Combined surface; Constraining; Drives; Exact sciences and technology; Friction drag; Friction, wear, lubrication; Interfacial slip; Journal bearings; Leakage; Machine components; Mathematical analysis; Mechanical engineering. Machine design; Numerical analysis; Radial sleeve bearing; Sleeve bearings; Slip
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2011.10.014

In order to improve the carrying capacity and reduce the temperature rise in high speed and precise spindle systems, a combined surface radial sleeve bearing using the interfacial slip technique was discussed. An extended Reynolds equation was derived based on the modified slip length model considering the limiting shear stress. By means of the finite differential methods, the characteristic analysis and optimization of the slip region of the combined surface sleeve bearing were carried out, and it has been proved that there is still a considerable large load support in a parallel sliding gap. Comparing with the general journal bearing, the load capacity and end leakage rate of the combined surface sleeve bearing can be increased greatly and the load capacity can be increased by 1.75 times. The attitude angle, friction drag, temperature rise of the combined bearing can be decreased distinctly and the temperature rise can be decreased by 92.4%. ► The modified Reynolds equation is established based on the modified slip length model. ► Load capacity gets a maximum at ψs=180° and Ls=0.7. ► Combined surface bearing gives a large load support, but gives a low temperature rise. ► Combined surface bearing gives a large load support in a parallel sliding gap.