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4726485 
Journal Article 
A new rubber/UHMWPE alloy for water-lubricated stern bearings 
Qin, HL; Zhou, XinC; Zhao, Xinze; Xing, JT; Yan, ZhiM 
2015 
1 
Wear
ISSN: 0043-1648
EISSN: 1873-2577 
328 
257-261 
WOS:000355360100027 
A new polymer alloy has been developed by blending powder of UHMWPE and graphite into nitrile rubber for marine stern tube bearings. It has good self-lubrication performance, which decreases the friction coefficient under low speed conditions and the critical speed at which bearing vibration and noise occur. Experimental investigations have been completed to examine its physical properties, integrated bearing friction as well as dynamic characteristics of the system in vibration and noise environments. The results show that mechanical and physical properties of new alloy meet the requirements of ship standard CB/T769-2008. Stick-slip occurs at the critical speed of 0.27 m/s. The friction coefficient is only about 50% of the restricted value in USA millitary specification MIL-DTL-17901 C(SH)(2005) at or less than the speed of 0.18 m/s, and reached a minimum value at the speed of 0.54 m/s. The permissible maximum value of local projected pressure is 0.7 MPa. The experimental results have confirmed the excellent low-speed performance and comprehensive function of the new Rubber/UHMWPE alloy which may be a good type of water-lubricated materials for marine stem tube bearings. (C) 2015 Elsevier B.V. All rights reserved. 
Rubber/UHMWPE alloy; Water-lubricated stern bearings; Frictional property; Bearing noise