宽基低断面455/40R22.5全钢载重子午线轮胎的设计

Design on Wide Base and Low Profile 455/40R22.5 Truck and Bus Radial Tire

介绍宽基低断面455/40R22.5全钢载重子午线轮胎的设计。结构设计:外直径934 mm,断面宽444 mm,行驶面宽度395 mm,行驶面弧高度18.41 mm,胎圈着合直径570.5 mm,胎圈着合宽度382 mm,断面水平轴位置(H1/H2)0.95,花纹深度15 mm,花纹饱和度79.6%,花纹周节数57。施工设计:胎面采用热、冷喂料双复合挤出,采用4层带束层结构,1~#,2~#和3~#带束层采用3×0.20+6×0.35HT钢丝帘线,4#带束层采用5×0.35HI钢丝帘线,胎体采用3+9×0.22WHT钢丝帘线,钢丝圈采用Φ1.65 mm胎圈钢丝,采用三鼓一次法成型机成型、双模B型热板硫化机硫化。成品轮胎性能试验结果表明,轮胎的外缘尺寸、强度性能和耐久性能等均符合相应设计和ETRTO标准要求。

The design on wide base and low profile 455/40 R22.5 truck and bus radial tire was described.In structure design,the following parameters were taken：overall diameter 934 mm,cross-sectional width 444 mm,width of running surface 395 mm,arc height of running surface 18.41 mm,bead diameter at rim seat 570.5 mm,bead width at rim seat 382 mm,maximum width position of cross–section（H1/H2） 0.95,pattern depth 15 mm,block/total ratio 79.6%,and number of pattern pitches 57.In construction design,the following processes were taken：the tread was formed by co-extrusion of hot and cold feedings,the belts were constructed by four layers,in which 3×0.20＋6×0.35 HT steel cord was used for 1-#,2-# and 3-# belt,5×0.35 HI steel cord was applied for 4-# belt,and 3＋9×0.22 WHT steel cord was used in the carcass.The tire was formed by using three-drum single-stage building machine and then cured on B-type hot plate vulcanizing machine.It was confirmed by the finished tire test that,the inflated peripheral dimension,strength and endurance met the requirements of the design and ETRTO standards.