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介绍385/65R22.5全天候全钢载重子午线轮胎的设计。结构设计:外直径1067 mm,断面宽385 mm,行驶面宽度308 mm,行驶面弧度高13 mm,胎圈着合直径570.5 mm,胎圈着合宽度311 mm,断面水平轴位置(H_(1)/H_(2))1.01,胎面采用对称式条形花纹,中心花纹块开设横向细沟槽,花纹深度16.5 mm,花纹周节数55,花纹饱和度70%,胎肩花纹采用封闭式设计。施工设计:胎体采用0.25+6+12×0.225HT钢丝帘线,1#和2#带束层采用3+8×0.33HT钢丝帘线,3#带束层采用1×5×0.30HI钢丝帘线,0°带束层采用3×7×0.20HE钢丝帘线,胎面采用双复合结构,采用一次法成型机成型,采用热板式硫化机硫化。成品性能试验结果表明,成品轮胎的充气外缘尺寸、耐久性能、滚动阻力、噪声、抗湿滑性能、雪地性能均达到相应设计要求。 相似文献
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汽车空气弹簧橡胶气囊的结构分析方法 总被引:3,自引:1,他引:3
为研究一套汽车空气弹簧橡胶气囊的结构分析方法,对橡胶气囊几何模型进行了简化,进而以薄膜理论、网格理论以及层合板理论为理论依据,推导出橡胶气囊薄膜内力、应力、应变、帘线力和变形位移等计算公式。为橡胶气囊的结构分析和强度校核奠定了理论基础。为检验所提出的结构分析方法的精确度和有效性, 以一汽车悬架用空气弹簧为实例,计算其变形和帘线力。为了进行比较,还对该空气弹簧结构建立了三维有限元模型,并用非线性有限元软件ABAQUS进行有限元数值分析。这两种方法的计算结果综合比较表明,所提出的结构分析方法不仅预测结果精确,而且大大节省计算量。 相似文献
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以平煤十二矿的焦煤、煤矸石、矿井水为研究对象,在添加接种物的条件下,以硫酸根、硝酸盐氮、氨氮、氟化物、硫离子、pH值和重金属为研究指标,对发酵液进行测定,结果表明:硫酸盐和产甲烷菌在一定条件下可以共存;整个系统的pH值呈弱碱性;氨氮严重超出了地下水的标准;各种重金属随着浸泡时间的延长有不同变化,但均未超出地下水Ⅲ类标准;浸泡时间的长短和接种物的加入使各指标之间有明显差异,是影响地下水的重要因素。 相似文献
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Jing Cai Xiaoyong Yang Ruimin Jiao Xiaofang He Xinxin Cao Fuqin Xu Zhaoyang Hou Zhihui Ma Xinyang Zhang 《应用聚合物科学杂志》2024,141(19):e55363
Pulverized coal (coal) possesses a layered structure similar to graphite and is a potential reinforcing filler. In this paper, ball milling is used to reduce the particle diameter of coal. The coal is modified with KH-560 to obtain K-COAL and prepared K-COAL/styrene-butadiene rubber (SBR) composites. In addition, carbon black (CB) is modified to obtain CB-Si69, K-COAL and CB-Si69 are added to SBR in different ratios to prepare COAL/CB/SBR composites. The results show that the addition of K-COAL can improve the vulcanization performance, thermal stability, and mechanical properties of SBR composites, but the reinforcing effect is weak. In the COAL/CB/SBR composites, the vulcanization and mechanical properties of the composites gradually increase with the increase of CB, while those of the thermal stability decrease. The tensile strength of the 10 phr COAL/30 phr CB/SBR composite is 24.1 MPa, which is elevated by 1105% and 205% compared with the pure SBR and 40 phr K-COAL/SBR composites, respectively. The composites maintain high elasticity while the tensile strengths are greatly improved, and the mechanical properties are significantly enhanced. In conclusion, this paper provides a reference for the clean utilization of coal and shows new possibilities for finding new fillers to replace CB. 相似文献