Effects of Nano-lubricants on the Friction and Wear Characteristics at Thrust Slide-Bearing of Scroll Compressors
This paper presents the friction and antiwear characteristics of nano-oil composed of refrigerant oil and fullerene nanoparticles in the thrust slide-bearing of scroll compressors.The nano-oil was evaluated using a thrust slide-bearing tester whose friction coefficient was measured,as a function of normal loads up to 4,000 N at orbiting speeds up to 3,200 rpm.The friction coefficient of fullerene nano-oil at the lower normal loads (＜～1,200 N) under the fixed orbiting speed (～1,800 rpm) was ～0.02,while that of pure oil was ～0.03,indicating that the fullerene nanoparticles dispersed in the base refrigerant oil improved the lubrication property by coating the friction surfaces,and this was also corroborated by verifying the presence of severe carbon elements on the wear surface.However the difference between friction coefficients for both nano-oil and pure-oil was found to be negligible at higher normal load conditions (＞～1,200N),indicating that the nanoparticles in the base oil have little effect on the enhancement of lubrication between the friction surfaces.The friction coefficient of nano-oil at various speeds of the orbiting plate in the thrust slide-bearing was found to be less than that of pure oil over the entire orbiting speed ranges between 300～3000 rpm.This is presumably because fullerene nanoparticles,which were inserted between the friction surfaces,improved the lubricating performance by increasing the lubricant oil viscosity and simultaneously preventing direct metal surface contacts.
Nanoparticles Nano-oil Lubrication Friction surfaces Thrust slide-bearing
Seongir Cheong Changgun Lee Yujin Hwang Kyongmin Kim Jaekeun Lee
School of Mechanical Engineering,Pusan National University,Busan,609-735,Korea.
国际会议
第六届压缩机与制冷国际会议(The 6th International Conference on Compressor and Refrigeration(ICCR))
西安
英文
199-209
2008-09-25（万方平台首次上网日期，不代表论文的发表时间）