共查询到19条相似文献,搜索用时 234 毫秒
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提出了多体接触体系的系统分解法,并据此法将回转窑这个接触大体系分解成筒体与滚圈接触体系、滚圈与托轮接触体系、托轮与托轮轴接触体系。通过在托轮与托轮轴的过盈配合面上设置接触单元,对托轮与托轮轴接触体系进行了有限元数值计算,得出了托轮、托轮轴易损部位的力学特征,这些特征为评价托轮、托轮轴的力学状态提供了定量的指标,为回转窑的预知维护提供了基础。 相似文献
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冀东水泥集团 2条 4 000t/d的水泥生产线于 2000年 7月份先后出现了回转窑托轮瓦烧毁的事故,托轮瓦损坏,托轮轴上与托轮瓦配合的部分损坏较重,但托轮瓦座仍可使用,我厂决定修复托轮轴,更换新轴瓦。由于托轮轴外径加工后尺寸减小,因此在托轮回装过程中需要有相应的调整方案,本文主要针对调整方案而进行计算。 托轮的调整方案有 3种:①托轮瓦座只水平向回转窑中心线方向移动;②托轮瓦座只垂直向上移动;③托轮瓦座既水平向回转窑中心线方向移动,又垂直向上移动。由于托轮轴加工掉的尺寸很小 (直径方向 1~ 3mm),所以托轮瓦座水… 相似文献
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回转窑托轮的工作状态对窑整体的稳定运转有着重要影响,测量托轮所受的轴向力可以判断托轮的运转情况。文章阐述了测量托轮轴向受力的意义;分析了托轮轴向受力的产生原因;介绍了一种检测托轮轴向受力的机械装置,应用此装置可以方便准确测量托轮轴向受力的大小。 相似文献
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以φ3.0 m煅烧炉托轮部分托轮毂和托轮套为研究对象,利用静配合连接设计与计算公式,导出托轮烘装前托轮毂与拖轮套之间的过盈配合的精确公差,并对原有托轮图纸的公差配合进行校核验证。 相似文献
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我公司采用的是Φ3.95×56m干法回转窑,斜度:4%,支座数:3,转速:主传动0.6~3.3r/min。一挡轮带下端装有液压挡轮。窑体支承装置是由托轮、托轮轴、滑动轴承及底座组成。托轮轴支承在两个滑动轴承的铜衬瓦上,铜瓦的下部是铸铁凸球面瓦,装于凹球面的轴承座上,具有自调位作用。滑动轴承采用油勺提油的润滑方式,并在球瓦内通冷却水进行冷却。在运行中由于窜窑时托轮的轴向力过大,出现了两次托轮轴头断掉现象。1轴头断掉情况及处理方法1.1I号托轮轴头的修复1997年1月28日,Ⅰ号托轮下部3#瓦轴头断掉(托轮及瓦序号见图1),托轮向上移动40mm,油勺刮1… 相似文献
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回转窑托轮与轮带的接触应力及轮带的性能分析 总被引:1,自引:0,他引:1
用接触力学方法推导了托轮与轮带接触应力的计算公式,利用ANSYS的二次开发功能,开发了托轮与轮带的有限元建模程序,建立了回转窑托轮与轮带的有限元分析模型。应用接触力学和有限元方法对2号窑的托轮轮带的接触应力进行了计算,表明这两种方法都有较高的计算精度。有限元法计算结果表明:在滚动接触过程中,轮带应力呈复杂交变状态,在与托轮的接触区内,出现了明显的应力集中,这使接触面表层易出现楔状掉块、开裂等接触疲劳破坏;在轮带回转过程中,每一点的变形均呈现凹凸交变的复杂状态,从而迫使筒体的变形凹凸交变,严重时导致窑衬松动脱落。 相似文献
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《Journal of Adhesion Science and Technology》2013,27(12):1539-1556
The co-cured joining method has several advantages over the adhesively bonded joining method because both the curing and the joining processes for the composite structures are achieved simultaneously. In this study, the tensile load-bearing capacities of co-cured double lap joints were investigated experimentally and compared with the analytical results calculated by finite element analysis. Co-cured double lap joint specimens with several bond parameters such as bond length, surface roughness, and stacking sequence of the composite laminate were fabricated and tested. From the experimental results, it was found that the failure mechanism of the co-cured double lap joint was cohesive failure by delamination at the first ply of the composite laminate in the co-cured double lap joint. Finally, optimum values of several bond parameters were determined. Analytical tensile load-bearing capacities of the co-cured double lap joints were calculated by the three-dimensional Tsai-Wu failure criterion using stress distributions obtained from finite element analysis. 相似文献
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《Journal of Adhesion Science and Technology》2013,27(3):287-299
This paper presents an approach to predicting the strength of joints bonded by structural adhesives using a finite element method. The material properties of a commercial structural adhesive and the strength of single-lap joints and scarf joints of aluminum bonded by this adhesive were experimentally measured to provide input for and comparison with the finite element model. Criteria based on maximum strain and stress were used to characterize the cohesive failure within the adhesive and adherend failure observed in this study. In addition to its simplicity, the approach described in this paper is capable of analyzing the entire deformation and failure process of adhesive joints in which different fracture modes may dominate and both adhesive and adherends may undergo inelastic deformation. It was shown that the finite element predictions of the joint strength generally agreed well with the experimental measurements. 相似文献