超声振动对不同黏度润滑油摩擦学性能的影响

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研究GCr15／45^#钢摩擦副在4种不同黏度的润滑油润滑时，有和无超声振动下的摩擦磨损性能，采用扫描电子显微镜分析磨痕表面形貌，探讨在不同黏度润滑油作用下，超声振动对润滑油摩擦学性能的影响机制。结果表明：超声振动对不同黏度润滑油摩擦学性能的影响是不同的；超声振动可以提高低黏度润滑油润滑的减摩抗磨性能，如在6^#白油润滑时施加超声振动后，摩擦副间的摩擦因数和磨损体积分别减小了13．6％和17．5％；高黏度润滑油润滑时，超声振动会加剧摩擦副的摩擦磨损，如在150BS润滑时施加超声振动后，摩擦副间的摩擦因数和磨损体积分别增加了10．4％和50％。 The friction and wear properties of GCr15/45^# steel frictional pairs lubricated by four different lubrication oils under ultrasonic vibration were studied. The surface morphologies of wear scare was analyzed by scanning electron micro- scope （SEM）. The effect mechanism of ultrasonic vibration on frictional pairs under different lubrication oils was discussed. The results show that the influence of ultrasonic vibration on friction reduction and anti-wear properties of friction pairs is different under various lubrication oils. When the viscosity of lubrication oil is low ,the friction coefficient and wear volume of the frictional pairs are reduced under ultrasonic vibration, and they are decreased by 13.6% and 17. 5% respectively under ultrasonic vibration,when the lubrication oil is 6^# white oil. However, when the viscosity of lubrication oil is high, the friction coefficient and wear volume of the frictional pairs are increased under ultrasonic vibration, and they are increased by 10. 4% and 50% respectively under ultrasonic vibration,when the lubrication oil is 150BS.