飞轮缠绕用圆环织物的设计

Design of annular woven fabric used for composite flywheel winding

为提高复合材料飞轮的径向强度,设计了径向也存在纱线的圆环形织物,它是按照飞轮层状展开得到的形状,经纱沿圆环的圆周方向,纬纱沿半径方向。分析圆环形织物在织造过程中经纬纱间的剪切变形,从织口到织物被织机的卷取成形辊握持,剪切变形角逐渐增大。剪切变形的存在,使机上圆环形织物的大小半径比设计值要小,而经纱密度变大。推导出织物机上尺寸与设计尺寸之间的关系,并可用于圆环织物的设计。实际制织了一种碳纤维圆环形织物,下机后经相反方向的剪切变形,得到了与设计相一致的结构。

In order to increase the radial strength of the composite flywheel, a kind of annular fabric in which yams exist in the radial direction was designed in accordance with the unfolding shape of flywheel. The warp yams are in the circular direction and weft yams in the radial direction. The shear deformation between warp and weft yams was analyzed in the weaving process. The shear ang/e gradually increases during the fabric moving from the fell to the take-up and shaping roller＇s holding position on the loom. The existence of shear deformation makes the maximum and minimum radii of the annular fabric on the loom are smaller than those of designed, but the warp yarn density becomes greater. The deduced relationship between the size of fabric on the loom and designed fabric size can be used to instruct annular fabric design. A kind of carbon fiber annular fabric was woven and the designed structure was obtained after shear deformation in the opposite direction when the fabric was off the loom.