【摘要】 以销盘磨损试验机配合振动加速度传感器和精密声级计为试验设备,研究了TiNi合金/GCr15轴承钢摩擦副干滑动摩擦噪声的特点和产生机理。结果表明由于磨损造成摩擦表面形貌恶化,使摩擦力值增大,且波动剧烈,急剧变化的摩擦力对摩擦系统不断输入能量,引起系统产生自激振动,向环境中辐射噪声。TiNi合金的耐磨性能优于淬火45#钢,所以在相同的试验条件下,TiNi合金/GCr15钢配副的滑动摩擦噪声比淬火45#钢/GCr15钢配副的低,尤其在载荷较大时,TiNi合金可以降低摩擦噪声3～5dB。更多还原

【Abstract】 Using pin-on-disc wear test rig equipped with acceleration sensors and precious noise meter,the characteristics of friction-induced squeal between the rubbing-pairs of TiNi/GCr15 were studied.The experimental results show that the wear deteriorates the topography of rubbing surface,which makes friction force not only rising but also fluctuating acutely.The fluctuating friction force is responsible for the self-exciting vibration of tribo-system since it continuously supplies tribo-system with energy.The noise level of rubbing-pairs of TiNi/GCr15 is lower than that of AISI-1045/GCr15 under almost all conditions because of the TiNi alloy’s superior wear-resistance.更多还原