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| 245/70R19.5电动城市公交车专用轮胎的设计开发 |
| Design and Development of 245/70R19.5 Special Tire for Electric City Bus |
| Received:July 07, 2022 Revised:July 07, 2022 |
| DOI：10.12135/j.issn.1006-8171.2023.06.0338 |
| 中文关键词: 电动城市公交车；轮胎；结构设计；施工设计；成品轮胎性能 |
| 英文关键词: electric city bus；tire；structural design；construction design；finished tire performance |
| 基金项目: |
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| 中文摘要: |
| 介绍245/70R19.5电动城市公交车专用轮胎的设计开发。结构设计：外直径 840 mm，断面宽 248 mm，行驶面宽度 210 mm，行驶面弧度高 9.5 mm，胎圈着合直径 493.5 mm，胎圈着合宽度 203 mm，断面水平轴位置（H1/H2） 1.032 3，胎面采用4条纵向曲折花纹，花纹深度 18.5 mm，花纹饱和度 81.99%，花纹周节数 54。施工设计：胎面采用胎面胶、基部胶和粘合胶片复合压出形式，胎体采用3×0.24＋9×0.225CCST钢丝帘线，1#带束层采用3×0.20＋6×0.35HT钢丝帘线，2#和3#带束层采用4＋3×0.35ST钢丝帘线，4#带束层采用5×0.30HI钢丝帘线，采用一次法机械鼓反包成型机成型，热板式硫化机硫化。成品性能试验结果表明，轮胎的充气外缘尺寸、强度、耐久性能和高速性能均达到相应的国家或企业标准要求。 |
| 英文摘要: |
| The design and development of 245/70R19.5 special tire for electric city bus was introduced.In the structure design，the following parameters were taken：overall diameter 840 mm，cross-sectional width 248 mm，width of running surface 210 mm，arc height of running surface 9.5 mm,，bead diameter at rim seat 493.5 mm，bead width at rim seat 203 mm，and maximum width position of cross–section
（H1/H2） 1.032 3.The tread adopted four longitudinal zigzag patterns，pattern depth 18.5 mm，block/total ratio 81.99%，and mumber of pattern pitches 54.In the construction design，the following processes were taken：adopted tread compound，base compound and adhesive film tri-coextrusion for tread，3×0.24＋9×0.225CCST steel cord for carcass，3×0.20＋6×0.35HT steel cord for 1# belt，4＋3×0.35ST steel cord for 2# and 3# belt，5×0.30HI steel cord for 4# belt，and using one-stage mechanical drum turn-up building machine to build tires and hot plate vulcanizing machine to cure tires.The test results of finished tire showed that，the inflated peripheral dimention，strength，durability and high-speed performance of the tire met the corresponding national or enterprise standards. |
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