一、湿式摩擦材料的种类工程机械使用摩擦材料主要是在制动器、动力变速箱和离合器等机构上,在四十、五十年代时摩擦材料一般采用石棉—树脂材料,这种材料成本低廉,制造容易,摩擦系数高。并不能承受高负荷及耐热性差等缺点,而工程机械的工作条件较恶劣,机械本身能量负荷也大,在工作过程中也频繁地变换方向,这 First, the type of wet friction materials Construction machinery using friction material is mainly in brakes, power gearbox and clutch and other agencies, in the forties and fifties friction materials generally use asbestos - resin material, the material is low cost, manufacturing Easy, high coefficient of friction. And can not withstand the high load and poor heat resistance and other shortcomings, and working conditions of construction machinery worse, the mechanical energy load itself is also large, in the course of the work also frequently change direction, which