本文对比了复合材料飞轮转子与金属材料飞轮转子的性能,指出复合材料比强度高、密度小等特点使其可以使飞轮具有更高的极限转速和储能能力。同时指出了复合材料各向异性的特点使得其垂直纤维方向强度低,限制了飞轮的最高转速。介绍了目前复合材料飞轮主要采用单层圆环飞轮和多层圆环飞轮2种结构形式。同时指出采用柔性树脂基体,改善树脂和纤维的界面粘结状态和增强树脂本身的强度也是提高复合材料径向强度的有效途径。

This paper compares the performance of the composite flywheel rotor and the metal flywheel rotor ,The fly-wheel can have higher limit speed and more energy storage capacity for the high strength and low density of composite mate -rials.The anisotropy of the composite material limits the maximum speed of the flywheel .Two kinds of structure of composite flywheel are introduced .The single-ring flywheel and the multi-ring flywheel .Using the flexible resin matrix ,enhancing the interface performance of resin and fiber ,reinforcing the strength of resin concrete can improve the strength of composite ma-terials.

为考察叶片式正位移挤出机停留时间及转子轴转速对共混物微观结构及性能的影响，在自行研制的挤出机上进行PS/HDPE熔融共混实验，沿挤出方向进行取样并进行测试与表征，分析了转子轴转速、取样位置等对共混物力学性能及相形态的影响。实验结果表明：在相同转子轴转速条件下，距离进料口越远，复合材料的拉伸强度先快速升高，而后基本保持不变，转子轴转速较高时拉伸强度升高的速度较快；在同一取样位置，复合材料的拉伸强度随转子轴转速的升高先快速增加然后缓慢增加，存在最佳转速；扫描电镜照片显示分散相PS呈椭球形，沿挤出方向PS的粒径开始以较快的速度减小，而后减小的速度逐渐变慢。叶片式正位移挤出机中物料能在短的热机械历程内实现共混物的混合，混合效率得到提高。

The PS/HDPE melt blending experiments were conducted with a self-made positive displacement flow type vane extruder. Samples obtained at four sampling locations along extrusion direction were used to characterize by tensile test and SEM. The influences of rotating speed and sampling location on mechanical properties and morphology of the composites were studied. The experimental results showed that the longer the distance from the feed inlet the tensile strength of the blends increased. The tensile strength increased rapidly first and then remained almost unchanged. The higher of the rotating speed the tensile strength increased faster. With the increase of rotator speed, the tensile strength at the fixed sampling location increased rapidly first and then slowly. There was an optimum rotator speed. As shown in the SEM photographs the dispersed phases of PS were ellipsoidal shaped in continuous phase. The particle size decreased rapidly first along extrusion direction and then decreased