Study on Friction and Wear Properties of Water Lubricated Rubber Bearing

Abstract

The friction and wear properties of the water lubricated rubber bearing, made of the nitrile butadiene rubber (NBR), were studied in this article. The results showed that adding the appropriate amounts of carbon black and molybdenum disulfide (MoS2) could reduce the friction coefficient and the abrasion loss to the minimum values. Meanwhile, the general laws of the two parameters with different loads, rotational speeds and lubricant media have been discovered: the values of friction coefficient and abrasion loss of the rubber bearing, lubricated in both water and seawater, increase firstly and then gradually decrease with the increasing loads.When the loads exceed 500N, the values increase drastically. And the values of friction coefficient and abrasion loss decline with the increasing rotating speed. Moreover, the values of these two parameters in seawater were a little bit higher than those in water. The friction and wear mechanisms of water lubricated rubber bearing were also discussed..

Tribological and Vibration Properties of Three Different Polymer Materials for Water-Lubricated Bearings

“…Figure 3 b shows that the friction coefficient of Thordon SXL seems to be relatively stable throughout the test. The friction coefficient is slightly similar at 60 and 90 N, but it decreases regularly when the applied load increases to 120, 150, and 180 N. Figure 3 c shows that the friction coefficient of BTG rubber seems to be stable with no significant fluctuation, and gradually decreases in the range of 60 to 180 N [ 28 ]. This occurs because the hardness of the BTG rubber material is small, and it is more prone to elastic deformation, which is beneficial to generate the local water film and form part of the elastohydrodynamic lubrication.…”

Study on the Natural Vibrations of the Rubber Bearings

“…There are some studies of the vibration characteristics of the rubber bearing. Duan Fang-li [1] mainly studied the water lubrication mechanism of rubber bearings, load bearing and friction characteristics etc.. Wang Jia-xu et al [2] analyzed the influence of load, speed, time etc. on the friction coefficient and wear rate of the water-lubricated rubber bearings.…”