摘要
设计了频率、振幅独立调整的低频振动发生器,搭建了振动摩擦实验平台,系统研究了不同振动频率、振幅和正压力条件下的摩擦响应。结果表明:在较大正压力下,无振动时金属摩擦副间的摩擦力随相对运动速度的增加逐渐降低;叠加低频振动时,金属摩擦副间的摩擦力明显下降,在较大正压力、振幅和振动频率条件下,振动减摩效果更明显;该条件下振动减摩的主要原因为界面摩擦状态从脂润滑过渡为边界摩擦、振动增大了界面运动速度,同时振动将试样凹坑处的润滑脂拽出改善了摩擦状态。
A low frequency vibration generator with independent adjustment of frequency and amplitude was designed, and a vibration and friction experiment platform was built to systematically study the friction response with different vibration frequencies, amplitudes and positive pressure. The results show that the friction force between the metal friction pairs gradually decreases with the increase of relative speed under larger positive pressure without ribration. When the low frequency vibration is superimposed, the friction force between the metal friction pairs decreases significantly, the effect of friction decrease by vibration is more obvious under the condition of larger normal pressure, vibration amplitude and vibration frequency. The main reason of friction reduction under those londitions is that the interface friction state transitions from grease lubrication to boundary friction, vibration increases the speed of the interface and pulls the grease out of the sample pit to improve the friction state.
作者
孟德安
马建
赵轩
赵升吨
MENG De-an;MA Jian;ZHAO Xuan;ZHAO Sheng-dun(School of Automobile,Chang′an University,Xi′an 710064,China;School of Mechanical Engineering,Xi′an Jiaotong University,Xi′an 710049,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2022年第4期168-175,共8页
Journal of Plasticity Engineering
基金
陕西省自然科学基础研究计划(2021JQ-250)
陕西省科技重大专项(2019ZDLGY15-01,2020zdzx06-01-01)。
关键词
低频振动
界面摩擦
振动减摩
摩擦力
low frequency vibration
interface friction
vibration anti-friction
friction force
