摩擦学原理摩擦表面状态
9
Main Areas in Tribology
Friction (摩擦) Wear(磨损) Lubrication(润滑)
Leonardo da Vinci 10
秦始皇兵马俑铜车马的1号车
Research——textured surface
Sample of textured surface
“现在我国汽车有1亿辆,摩托车1亿3000万辆。这些 摩托司机都有一个梦,梦见两轮变成四轮,摩托车变 成汽车。摩托车的升级有着巨大的市场。”
中国汽车工业协会
2012年中国汽车产销量双双超过了1900万辆,轿车销售达 到了1074万辆,其中中德、中日、中美、中韩、中法等合资企 业在中国实现汽车销售250万辆、190万辆、196万辆、172万 辆,105万辆,和44万辆。
中国汽车工业协会统计分析,2013年1-9月,中国品牌乘用车共 销售512.50万辆,同比增长12.14%, 德系、日系、美系、韩 系和法系乘用车分别销售254.17万辆、198.28万辆、160.46万 辆、116.12万辆和40万辆,分别占乘用车销售总量的19.78%、 15.43%、12.49%、9.04%和3.11%。 中国汽车1-9月产销量1281万辆.
Introduction
Tribology:
Tribology is the science, application science, which deals with of the two surfaces having relative movement, or moving trend, covers Friction, Lubrication and Wear. It has some research field related to Physics, Chemistry, Metallurgy, Material Science, Rheology, Hydromechanics, Elasticity, Viscoelasticity, Thermodynamics, as well as, Machinery Science and so on.
2012款奥迪A6L 2.5L 30 FSI手自一体, 最大功率140KW 140KW*2000万辆=28亿千瓦
The highest efficiency of Internal-combustion engine is less than 30%
Oil energy have more than 50% waste as heat, With the rest, there are 20% energy used to control the devices. there are about 30% energy used for over come the friction, 2% gears, 5% bearings and so on。
From Leonardo da Vinci (1452-1519) to Sir Jost report in 1960’s. Tribology from single, isolated study becomes a research field of systematically study of friction, lubrication and wear
Main contents of《 Automotive Tribology 》
Part one, Theory of tribology. Introduction、solid surface, friction and wear
Double layer 1
Double layer 2
Surface texture
Surface texture by laser Type of texture,a-triangle,b-square,c-circle;1-convexly,2-concave
Bearings, piston—rings
Automotive Tribology
SCHOOL OF MECHANICAL ENGINEERING
XI’AN JIAOTONG UNIVERSITY xuhua@mail徐.xjt华
Tel 82669157源自在购车经费一定的情况下,你买车时首 先考虑的因素有那些?列举三个,各用 一句话来说明。
3
“2012中国汽车产业发展高层论坛 ”
2012年10月在钓鱼台国宾馆举行“2012中国汽车产业 发展高层论坛” 。
中国汽车协会副会长董扬在发言中指出,中国汽车市 场的发展空间依旧宽广,2020年之前应会保持与GDP 增长率一致的发展速度。 “中国汽车已经连续两年增 长,这个市场到底有多大?2020年之前,中国汽车应 该能够在产销数量用大于等于GDP的数额增长,由于 当前我国人均的汽车数量还很低,从现代社会大生产 的结构要求来讲,需要更多的汽车;第三个原因是现 在中国的机动车数量最多的不是汽车,而是摩托车, 这其中蕴含着因为升级换代带来的巨大增长空间。
The Wheel is the most successful example of Tribological design. And lubricant has been used for more than three thousand years.
By estimate,1/3~1/2 energy sources, consumed by human, owing to friction and wear。
Without texture,friction coefficient 0.069
under microscope
10v 15min, With texture,deepness 3 μm friction coefficient 0.031
Surface texture 表面织构
square texture