超声振动对内燃机缸套摩擦润滑状态影响的研究

降低缸套-活塞组件的摩擦力是提高内燃机可靠性和耐久性的重要技术问题。在关于摩擦副减摩的研究与实践中,超声振动减摩因其良好的减摩性能得到了研究人员的广泛关注。为了研究超声振动对内燃机缸套组件摩擦润滑状态的影响,本文对比分析了在缸套外壁有、无超声激振条件下的内燃机摩擦损耗。通过对内燃机缸体进行结构改制,在内燃机倒拖试验台上引入超声激振设备,搭建了新型单缸内燃机的超声振动减摩试验台架。通过试验研究了内燃机缸套活塞组件在不同激励工况下的超声振动减摩情况。研究表明：施加高频振动后,缸套-活塞组件间出现了接近于粗糙度等级的动态变形,内燃机摩擦损耗较未激振前呈现出小幅降低。

Study on Friction Lubrication on Cylinder Liner of Internal Combustion Engine :Effect of Ultrasonic Vibration

It is an important technical problem to study the friction reduction of piston-liner assembly in improving the reliability and durability of the internal combustion engine. In the research and practice on friction reduction, ultrasonic vibration reduction has been paid close attention by researchers because of its good friction reduction performance. In this paper, the friction loss of the internal combustion engine with or without ultrasonic excitation is studied in order to study the effect of ultrasonic vibration on the friction and lubrication state of the cylinder assembly. Through the internal combustion engine cylinder to do the corresponding process, the ultrasonic vibration equipment was introduced into the test bench of the internal combustion engine, and a new single-cylinder internal combustion engine ultrasonic vibration reduction test bench was built. The friction reduction between piston and liner assembly through added ultrasonic vibrations is studied by means of experiments in different excitation conditions. The results of study show that: After additional high frequency vibration, there is a dynamic deformation of cylinder liner is close to the surface roughness magnitudes, and the friction loss of the internal combustion engine is slightly lower than that before the excitation.