385/65R22.5全钢载重子午线轮胎的研制

Design on 385/65R22.5 All-steel Truck and Bus Radial Tire

介绍385/65R22.5轮胎的设计。结构设计:外直径1 070 mm,断面宽394 mm,行驶面宽度288 mm,行驶面弧度高12.5 mm,胎圈着合直径569.5 mm,胎圈着合宽度324 mm,断面水平轴位置(H_1/H_2)1.059 7,胎面采用纵向花纹变节距设计,花纹深度15 mm,花纹周节数51,花纹饱和度78.5%。施工设计:胎面胶采用三方四块结构,带束层采用3+0°结构,1~#和2~#带束层采用3×0.20+6×0.35HT钢丝帘线,3~#带束层采用5×0.30HI钢丝帘线,0°带束层采用3×7×0.20HE钢丝帘线,胎体采用3+9+15×0.175W钢丝帘线,钢丝圈采用六角形结构,采用一次法成型机成型,双模硫化机氮气硫化。成品性能试验结果表明:轮胎充气外缘尺寸、强度性能和耐久性能均达到国家标准要求。

The Design of 385/65 R24. 5 all-steel truck and bus radial tire was described. In structure design,the following parameters were taken：overall diameter 1 070 mm,cross-sectional width 394 mm,width of running surface 288 mm,arc height of running surface 12. 5 mm,bead diameter at rim seat569. 5 mm,bead width at rim seat 324 mm,maximum width position of cross-section（H1/H2） 1. 059 7,longitudinal pattern with variable pitch design for tread,pattern depth 15 mm,the number of pattern pitches 51,and block/total ratio 78. 5%. In construction design,the following processes were taken：3 formula and 4 piece structure for tread,three layers＋0° layer structure for belt ply,3×0. 20＋6×0. 35 HT steel cord for 1# and 2# belt,5×0. 30 HI steel cord for 3# belt,3×7×0. 20 HE steel cord for 0° belt,3＋9＋15×0. 175 W steel cord for carcass,using one-stage building machine to build tire and double mold press to cure tire with nitrogen. It was confirmed by the finished tire test that,the inflated peripheral dimensions,strength performance and endurance performance reached the requirements of national standards.