制动速度与压力对飞机炭刹车盘摩擦磨损性能的影响

采用HJDS-Ⅱ惯性台在各种制动速度/压力及外场装机使用的条件下,对西安超码科技公司采用自主创新专利技术生产的Chaoma B757,Chaoma A320炭刹车盘与Dunlop公司的B757,以及Messier-Bugatti公司的A320Sepcarb?ⅢOR炭刹车盘的摩擦因数、平均力矩和磨损率进行对比试验。结果表明:4种类型炭刹车盘材料的能量、力矩均随制动速度和制动压力增加而增大;摩擦因数在低速阶段均出现低能峰值特性,然后随着制动速度与压力增加呈降低趋势。ChaomaB757,A320炭刹车盘凸显2个特色:在飞机中止起飞能量下制动压力比国外原件低25%,摩擦因数比国外原件高25%～29%;B757炭刹车盘的装机应用的最长使用寿命达到2823~3289次起落,与国外B757原件的使用寿命相当,凸显出优异的低磨损率特色。

Effects of braking velocity and pressure on aircraft brake discs' friction and wear properties

The tests for friction coefficient,average moment and wear ratio of carbon brake discs such as ChaomaB757,A320 and DunlopB757,Messier-Bugatti A320Sepcarb-ⅢOR,have been carried out under the condition of field operation on airplane at different brake velocity/pressure by HJDS-ⅡDynamometer.The results show that the energy and moment of the four types of carbon brake discs increase with increasing braking velocity/pressure.The friction coefficient shows lower energy peak property,and with increasing brake velocity/pressure,the friction coefficient decreases.ChaomaB757,A320 carbon brakes present two characteristics: the braking pressure is 25% lower and the friction coefficient is 25%-29% higher than those of the abroad ones;the longest life-span on airplane of B757 is in the range of 2 823 to 3 289 times of landing,which is equivalent to abroad ones.The aircraft brake discs shows the excellent characteristic of wear ratio.