Influence on Friction Coefficient of Grey Cast Iron According to the Variable Viscosities of the Mineral Lubricant

摘要：

It has been recognized that the friction coefficient decreased with decreasing viscosity of oil in lubrication and played an important role in the performance of compressor.The evaluation of the friction coefficient under variable viscosity with gray cast iron is presented.The experimental investigations were carried out with the disk-on-disk tester for measuring the friction coefficient and we have used the viscometer to obtain the viscosity.The naphthalene mineral oils of 12,30,55,96 and 145 cSt,characterized by viscosity,were used.As a result,the temperature of sliding parts increases with increasing the load that applied on sliding parts under different viscosities.Dynamic viscosities under increasing the load to sliding parts are lower for the higher temperature of sliding parts.The friction coefficient is lower for the higher lubricant viscosity.The decreasing rate of the friction coefficient decreases progressively,while it has a little slowed period at the 50～96 cSt.The results of the experiment show the characteristics of the mixed lubrication regime.The lubricant viscosities have no effect on the surface roughness and straightness.The morphology shows a little indication of transition phase with different lubricant viscosities.The smoothened surface is relatively further showed in the lower viscosity than higher lubricant viscosity.

关键词： Friction Coefficient Disk-on-disk tester Lubricant Viscosity Compressor Performance

作者: Boncheol Ku Youngchul Han Yujin Hwang Jaekeun Lee

作者单位: School of Mechanical Engineering,Pusan National University,Busan,609-735,Korea

会议类型: 国际会议

会议名称: 第六届压缩机与制冷国际会议(The 6th International Conference on Compressor and Refrigeration(ICCR))

会议地点: 西安

会议语种:英文

页码: 279-287

在线出版日期: 2008-09-25（万方平台首次上网日期，不代表论文的发表时间）