超大型轴承套圈渗碳后限形淬火夹具设计

发布时间：2019-03-19 16:18

【摘要】：近年随着风电长足发展,风力发电机传动系统也变得日趋庞大；作为传动环节中的重要零部件,轴承的尺寸也随之猛增至现在的2.5米最大至4米。到目前为止,大型轴承套圈限形淬火夹具原理仍然是沿用自锁锥面。然而随着轴承套圈尺寸的不断加大,轴承套圈对自锁锥面施加的环周紧缩力也不断增大,在生产中也越来越多地导致了脱模困难；同时由于夹具体积与轴承套圈体积正比增长,从而也大幅提升了夹具本身的制造难度；并且本来可以很容易在中小型轴承套圈限形夹具中实现机构联动,由于大型轴承套圈限形淬火夹具的体积过大,也变得不易实现,生产中时常发现大型轴承套圈限形淬火夹具同步动作困难,需要不断调整修正。本论文基于大型轴承套圈的渗碳淬火夹具设计原理,深入剖析了大型轴承套圈的渗碳淬火夹具设计原理的利弊,最终探索并总结出针对超大型轴承套圈限形淬火夹具的设计方案。超大型轴承套圈限形淬火夹具将通过分布在不同方向的的若干组连杆机构对轴承套圈进行支撑,减小了夹具开合尤其是脱模时的作用力,使轴承套圈易于脱模；同时连杆机构的应用减小了夹具上单一零件尺寸,显著降低了夹具制造难度；若干组连杆同时由芯轴统一驱动,从而实现夹具在各个方向上整体动作一致。本论文通过实际试验方法,获得了超大尺寸轴承套圈淬火过程中对夹具形成的环周压力,并以此为基础作为限形淬火夹具的受力设计输入。本文的目标是针对超大型轴承在限形淬火中遇到的困难,提出新的设计方案；并基于有限元应力分析、公差分析等方法,设计出一套针对超大型轴承套圈的限形淬火夹具,最终设计方案满足之前提出的改进要求。
[Abstract]:In recent years, with the rapid development of wind power, the wind turbine transmission system has become increasingly large; as an important part of the transmission link, the size of the bearing has increased sharply to the current 2.5 meters to the maximum of 4 meters. Up to now, the principle of self-locking cone is still used in the limited-shape quenching fixture of large bearing ring. However, with the increasing size of bearing ring, the circumferential tightening force applied by bearing ring to the self-locking cone is also increasing, which leads to more and more difficult to release mold in production. At the same time, because the volume of fixture is proportional to the volume of bearing ring, the manufacturing difficulty of fixture itself is greatly improved. And it could have been easy to realize mechanism linkage in the small and medium-sized bearing ring shape-limiting fixture, because the volume of the large-scale bearing ring shape-limiting quenching fixture was too large, it also became difficult to realize. In production, it is often found that the synchronous action of the large bearing ring quenching fixture is difficult, and it needs to be adjusted and corrected continuously. Based on the design principle of Carburizing quenching fixture for large bearing ring, the advantages and disadvantages of Carburizing quenching fixture design principle for large bearing ring are deeply analyzed in this paper. Finally, the design scheme of the shape-limiting quenching fixture for the super-large bearing ring is explored and summarized. The limited-shape quenching fixture of the super-large bearing ring will support the bearing ring through several groups of linkage mechanisms distributed in different directions, which reduces the force of the clamp opening and closing, especially when the die is released, and makes the bearing ring easy to release the die. At the same time, the application of the linkage mechanism reduces the size of the single part in the fixture and reduces the difficulty of the fixture manufacture, and several groups of links are driven by the mandrel at the same time, so that the whole action of the fixture in all directions can be achieved in the same way. In this paper, the circumferential pressure of the clamp formed during the quenching process of the super-sized bearing ring is obtained by the practical test method, which is used as the input of the force design of the quenching fixture for the limited-shape quenching. The aim of this paper is to put forward a new design scheme in view of the difficulties encountered in the shape-limiting quenching of the super-large bearing. Based on the finite element stress analysis, tolerance analysis and other methods, a set of shape-limiting quenching fixture for super-large bearing ring is designed, and the final design scheme meets the requirements of improvement proposed earlier.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG155.3

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