论文部分内容阅读
以1600 k N伺服机械压力机的滑动轴瓦为研究对象,对轴瓦工作时的受力状态进行数值模拟分析,并采用压力测量胶片在10 k N微型压力机上进行了轴瓦受力的实验验证。结果表明,工作时轴瓦所承受的应力主要发生在其正下方区域,应力的大小从中间向两端逐渐减少,应力分布不均匀。轴瓦与轴之间接触压力和摩擦切应力的分布规律与等效应力的相似。轴瓦厚度增加能降低轴瓦所承受的应力,有效提高轴瓦的承载能力。轴瓦与轴之间较大的配合间隙将导致轴瓦承载区域减小,轴瓦所受的应力增大。轴瓦与轴承座之间的过盈配合能使轴瓦的承载面积明显增大,最大等效应力降低,应力分布更均匀。
The sliding bearing of 1600 kN servo mechanical press is taken as the research object. The stress state of the bearing bush is simulated by numerical simulation. The stress of bearing bush is verified by pressure measurement film on 10 kN mini press. The results show that the stress on the bearing shell occurs mainly in the area right under the bearing. The stress reduces gradually from the middle to both ends and the stress distribution is not uniform. The contact pressure between the bush and the shaft and the friction shear stress distribution are similar to the equivalent stress. Increasing the thickness of the bearing bush can reduce the stress on the bearing bush and effectively increase the bearing capacity of the bearing bush. A larger clearance between the bearing bush and the shaft will reduce the bearing area of the bearing bush and increase the stress on the bearing bush. The interference fit between the bearing bush and the bearing seat can obviously increase the bearing area of the bearing bush, reduce the maximum equivalent stress and make the stress distribution more uniform.