Wk-10挖掘机回转支承的失效分析及力学性能研究
发布时间：2018-07-24 22:09
【摘要】：本文是以鞍钢集团检修协力公司使用中的wk-10挖掘机为研究对象，对挖掘机回转支承装置进行失效分析及力学性能研究。矿用挖掘机在工作的过程中，回转支承装置起到至关重要的作用，实现回转支承平台承受载荷和旋转的功效。回转支承装置在采掘的过程中受力复杂，，因此其可靠性对整机的性能有重要的影响。 从回转支承的应用角度出发，对实际工作中的回转支承进行失效分析，重点分析了其中关键的零件——滚子和轨道，包括滚子常见的失效形式，提出合理的防护措施和重要的改进方法；根据wk-10电铲实际工作情况，对其回转支承的结构特点进行分析，确定回转支承装置承受最大载荷值时的典型工况，在此基础上研究回转支承装置的整体受力，求解回转支承承受电铲动臂、斗柄、铲斗、三角架、配重、物料等时的载荷值，并提供回转支承装置摩擦力矩的计算依据。 在现有wk-10电铲回转支承二维图纸的基础上，进行三维模型建立，完成回转支承装置装配。将回转支承的滚子-轨道模型导入有限元分析软件Ansys，利用Ansys workbench模块进行回转支承滚子-轨道应力和变形的分析，得到各个零部件受工作载荷后的应力云图和位移云图，找出应力和位移的最大值，同时得出零件的边缘效应对零件的影响。 对回转支承的滚子-轨道进行结构的改进，为减小或避免回转支承运动时圆柱滚子与轨道之间产生的速度差，将滚动体改为圆锥形，与其配合的轨道接触面也改为锥形表面。再对圆锥滚子-轨道进行应力和变形分析，求解其应力云图、位移云图，并将该结果与改进前的支承进行对比，说明改进的效果和意义。
[Abstract]:This paper takes the wk-10 excavator in use in Angang Group maintenance Cooperation Company as the research object, carries on the failure analysis and the mechanical performance research to the excavator rotary bearing device. The rotary support device plays an important role in the working process of the mining excavator and realizes the function of bearing the load and rotation of the rotary support platform. The reliability of rotary bearing device has an important effect on the performance of the whole machine. From the point of view of the application of rotary bearing, the failure analysis of rotary bearing in practice is carried out, and the key parts, roller and track, are emphatically analyzed, including the common failure forms of rollers. The reasonable protective measures and important improvement methods are put forward, according to the actual working conditions of the wk-10 electric shovel, the structural characteristics of the slewing support are analyzed, and the typical working conditions of the slewing support device when bearing the maximum load value are determined. On this basis, the integral force of the slewing support device is studied, and the load values of the slewing bearing the shovel arm, bucket handle, bucket, tripod, counterweight, material, etc., are solved, and the calculation basis of friction moment of the rotary support device is provided. On the basis of the existing 2D drawing of wk-10 rotary support, the 3D model is established to complete the assembly of the rotary support device. The roller track model of rotary bearing is introduced into the finite element analysis software Ansys, and the stress cloud diagram and displacement cloud diagram of each component are obtained by using Ansys workbench module to analyze the stress and deformation of roller track of rotary bearing. Find out the maximum stress and displacement, and get the influence of the edge effect on the part. In order to reduce or avoid the velocity difference between the cylindrical roller and the track, the rolling body is changed to a conical shape, and the track contact surface is changed to a conical surface in order to reduce or avoid the velocity difference between the cylindrical roller and the track. Then the stress and deformation of the tapered roller track are analyzed and the stress cloud diagram and displacement cloud diagram are solved. The results are compared with the support before the improvement to illustrate the effect and significance of the improvement.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU621
本文编号：2142811
[Abstract]:This paper takes the wk-10 excavator in use in Angang Group maintenance Cooperation Company as the research object, carries on the failure analysis and the mechanical performance research to the excavator rotary bearing device. The rotary support device plays an important role in the working process of the mining excavator and realizes the function of bearing the load and rotation of the rotary support platform. The reliability of rotary bearing device has an important effect on the performance of the whole machine. From the point of view of the application of rotary bearing, the failure analysis of rotary bearing in practice is carried out, and the key parts, roller and track, are emphatically analyzed, including the common failure forms of rollers. The reasonable protective measures and important improvement methods are put forward, according to the actual working conditions of the wk-10 electric shovel, the structural characteristics of the slewing support are analyzed, and the typical working conditions of the slewing support device when bearing the maximum load value are determined. On this basis, the integral force of the slewing support device is studied, and the load values of the slewing bearing the shovel arm, bucket handle, bucket, tripod, counterweight, material, etc., are solved, and the calculation basis of friction moment of the rotary support device is provided. On the basis of the existing 2D drawing of wk-10 rotary support, the 3D model is established to complete the assembly of the rotary support device. The roller track model of rotary bearing is introduced into the finite element analysis software Ansys, and the stress cloud diagram and displacement cloud diagram of each component are obtained by using Ansys workbench module to analyze the stress and deformation of roller track of rotary bearing. Find out the maximum stress and displacement, and get the influence of the edge effect on the part. In order to reduce or avoid the velocity difference between the cylindrical roller and the track, the rolling body is changed to a conical shape, and the track contact surface is changed to a conical surface in order to reduce or avoid the velocity difference between the cylindrical roller and the track. Then the stress and deformation of the tapered roller track are analyzed and the stress cloud diagram and displacement cloud diagram are solved. The results are compared with the support before the improvement to illustrate the effect and significance of the improvement.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU621
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