【摘要】：本文是以鞍鋼集團(tuán)檢修協(xié)力公司使用中的wk-10挖掘機(jī)為研究對(duì)象，對(duì)挖掘機(jī)回轉(zhuǎn)支承裝置進(jìn)行失效分析及力學(xué)性能研究。礦用挖掘機(jī)在工作的過(guò)程中，回轉(zhuǎn)支承裝置起到至關(guān)重要的作用，實(shí)現(xiàn)回轉(zhuǎn)支承平臺(tái)承受載荷和旋轉(zhuǎn)的功效�；剞D(zhuǎn)支承裝置在采掘的過(guò)程中受力復(fù)雜，，因此其可靠性對(duì)整機(jī)的性能有重要的影響。 從回轉(zhuǎn)支承的應(yīng)用角度出發(fā)，對(duì)實(shí)際工作中的回轉(zhuǎn)支承進(jìn)行失效分析，重點(diǎn)分析了其中關(guān)鍵的零件——滾子和軌道，包括滾子常見(jiàn)的失效形式，提出合理的防護(hù)措施和重要的改進(jìn)方法；根據(jù)wk-10電鏟實(shí)際工作情況，對(duì)其回轉(zhuǎn)支承的結(jié)構(gòu)特點(diǎn)進(jìn)行分析，確定回轉(zhuǎn)支承裝置承受最大載荷值時(shí)的典型工況，在此基礎(chǔ)上研究回轉(zhuǎn)支承裝置的整體受力，求解回轉(zhuǎn)支承承受電鏟動(dòng)臂、斗柄、鏟斗、三角架、配重、物料等時(shí)的載荷值，并提供回轉(zhuǎn)支承裝置摩擦力矩的計(jì)算依據(jù)。 在現(xiàn)有wk-10電鏟回轉(zhuǎn)支承二維圖紙的基礎(chǔ)上，進(jìn)行三維模型建立，完成回轉(zhuǎn)支承裝置裝配。將回轉(zhuǎn)支承的滾子-軌道模型導(dǎo)入有限元分析軟件Ansys，利用Ansys workbench模塊進(jìn)行回轉(zhuǎn)支承滾子-軌道應(yīng)力和變形的分析，得到各個(gè)零部件受工作載荷后的應(yīng)力云圖和位移云圖，找出應(yīng)力和位移的最大值，同時(shí)得出零件的邊緣效應(yīng)對(duì)零件的影響。 對(duì)回轉(zhuǎn)支承的滾子-軌道進(jìn)行結(jié)構(gòu)的改進(jìn)，為減小或避免回轉(zhuǎn)支承運(yùn)動(dòng)時(shí)圓柱滾子與軌道之間產(chǎn)生的速度差，將滾動(dòng)體改為圓錐形，與其配合的軌道接觸面也改為錐形表面。再對(duì)圓錐滾子-軌道進(jìn)行應(yīng)力和變形分析，求解其應(yīng)力云圖、位移云圖，并將該結(jié)果與改進(jìn)前的支承進(jìn)行對(duì)比，說(shuō)明改進(jìn)的效果和意義。
[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.
【學(xué)位授予單位】：遼寧科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU621

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