氧化锌减量对内燃机车用二系橡胶堆性能的影响

Effect of Reduction of Zinc Oxide Amount on the Properties of Rubber Compound for Side Bearing

研究氧化锌减量对内燃机车用二系橡胶堆胶料性能和成品耐疲劳性能的影响。结果表明:氧化锌用量从5份减到3份,胶料的t10和t90缩短,硬度、定伸应力、拉伸强度及压缩永久变形基本不变,撕裂强度增大,压缩疲劳温升降低,屈挠龟裂性能改善;成品橡胶堆的垂向刚度及剪切刚度略微减小,疲劳试验后的垂向变形、垂向刚度变化率、剪切刚度变化率减小,温升降低,耐疲劳性能提高。

The effect of reduction of zinc oxide amount on the properties of the rubber compounds for the side bearing of secondary suspension on diesel locomotive and its inlfuence on the performance of the ifnished rubber bearing parts were investigated. The addition amount of zinc oxide was reduced from original 5 phr to 3 phr. The experimental results showed thatt10 andt90 of the compound were shortened. The hardness, modulus, tensile strength and compression set of the vulcanizates were unchanged, the tear strength increased, the temperature increase in dynamic compression test was reduced, and the lfex cracking resistance was improved. The vertical stiffness and shear stiffness of the ifnished rubber parts decreased slightly. The vertical deformation, change of vertical stiffness and change of shear stiffness after fatigue test were reduced. The temperature increase of the rubber parts due to dynamic fatigue was reduced. The test results indicated that the fatigue resistance was improved.