基于四球试验的润滑油颗粒污染物对摩擦振动的诱导关系研究

Research on the Friction Vibration Induced by Debris in Lubricant Based on Four-Ball Test

润滑油中颗粒污染物会直接影响润滑油的润滑性能并加剧摩擦副的磨损,同时还会诱导摩擦副产生额外的振动,对机械设备的工作寿命和可靠性构成威胁。为研究颗粒污染物对摩擦振动的诱导关系,在四球式摩擦磨损试验机上,通过改变颗粒物材质、尺寸和含量,研究颗粒污染物诱导摩擦副产生的摩擦振动。结果表明,在一定硬度范围内,颗粒物材质硬度越低越容易诱导摩擦振动;在一定尺寸范围内,颗粒物尺寸越小越容易诱导摩擦振动;存在颗粒污染物含量临界值使摩擦振动最大,低于该临界值时摩擦振动减弱,高于该临界值时不会引起摩擦振动。

Debris in lubricants affect the lubrication performance of lubricants directly, which causes the aggravated wear and extra vibration of the friction pairs, and puts a threat to lifespan and reliability of the equipment.To research the inductive relationship of debris to friction vibration, the friction vibration induced by debris in lubricants was studied on the four-ball tester by changing the material, size and concentration of the debris.Experimental results show that,within a cer- tain range, the smaller the hardness of debris is, the easier it is to induce the friction vibration. Smaller size of debris can induce friction vibration easily within the size range of debris used in the experiments.There is a critical value of debris concentration that can cause the biggest friction vibration, the friction vibration will decrease when the concentration Of debris is less than the critical value, and the friction vibration will disappear when the concentration of debris is higher than the critical value.