圆锥滚子修形理论研究及旋转尾管悬挂器轴承性能优化

发布时间：2018-04-19 16:09

本文选题：滚子修形 + 修形理论改进　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：近几十年我国油气勘探开发事业蓬勃发展,油气井大量开采,同时各种复杂井况也相继出现。固井是油气井开采过程中一个十分重要的环节,固井质量的好坏,直接影响着这口井能否顺利进行生产。目前国内外广泛采用旋转尾管固井工艺,但旋转尾管固井工具中的悬挂器轴承却是易损部件,目前使用的轴承寿命低于20h,严重影响着固井效率和固井质量。导致这种情况主要原因之一是固井时超重负载使悬挂轴承滚子产生了严重的边缘效应,进而使滚子过早破碎、轴承失效。针对此问题,本文采用滚子修形的方案对滚子的受力效果进行改善,进而提高轴承和整个旋转尾管悬挂器的使用寿命。具体的工作内容和结论如下:1对悬挂器轴承滚子在受载荷时破碎失效机理进行了分析,过高的“边缘效应”是失效的主要原因,可以通过滚子修形的方法加以改善。2改进了经典滚子修形理论:提出了圆柱滚子修形理论应用在本文圆锥滚子修形的转换方法;确定了截交、切交、全凸母线修形的最佳凸度求解方案、提高了修形效率和准确率;结合圆锥滚子的几何特征,对经典Lundberg对数曲线进行改进,使其成为了连续的修形曲线。4利用改进母线修形理论对悬挂器轴承进行修形建模,并利用有限元法对改进后的滚子进行了分析比较,最佳修形母线是改进对数母线,其最大接触应力相对于修形前降低了33.71%,最大等效应力降低了48.73%。4提出采用样本插值拟合法对深穴修形滚子进行结构参数优化,确定了悬挂器轴承滚子的最佳修形空心度和修形深度,得到了符合本文工况的最优修形方案,最大接触应力降低了27.80%,最大等效应力降低了37.00%。并将其与改进对数母线修形方案做了综合评价,企业可结合实际选用优化方案。5通过Solidworks二次开发实现了基于改进修形理论的参数驱动滚子自动建模功能,编制了友好的人机界面,简化了计算,提高建模效率,方便后续使用。通过本文对旋转尾管悬挂器轴承滚子修形理论的研究,改进了滚子受力效果,在一定程度上提高了轴承的使用寿命,进而提高了旋转尾管悬挂器的使用性能。
[Abstract]:In recent decades, the exploration and development of oil and gas in China has developed vigorously, and a large number of oil and gas wells have been exploited, at the same time, a variety of complex well conditions have emerged.Cementing is a very important link in the process of oil and gas production. The quality of cementing directly affects the smooth production of this well.At present, the rotary tailpipe cementing technology is widely used at home and abroad, but the suspension bearing in the rotary tailpipe cementing tool is a vulnerable component. At present, the life of the bearings used is less than 20 h, which seriously affects the cementing efficiency and cementing quality.One of the main reasons for this is that the overloaded load during cementing causes a serious edge effect on the suspended bearing roller, which causes the roller to break prematurely and the bearing to fail.In order to solve this problem, the force effect of roller is improved by the scheme of roller modification, and the service life of bearing and the whole rotary tail tube suspension is improved.The concrete work contents and conclusions are as follows: (1) the failure mechanism of the suspension bearing roller is analyzed when it is loaded, and the "edge effect" is the main reason for the failure.The classical roller modification theory can be improved by the method of roller modification. 2. The conversion method of cylindrical roller modification theory applied in this paper is put forward, and the intersecting and intersecting are determined.The method of solving the optimal convexity of full convex busbar improves the efficiency and accuracy of the modification, and improves the classical Lundberg logarithmic curve by combining the geometric characteristics of the cone roller.It has become a continuous modification curve .4 the improved busbar modification theory is used to model the suspension bearing and the improved roller is analyzed and compared by using the finite element method. The best modification bus is the improved logarithmic bus.The maximum contact stress is reduced by 33.71 and the maximum equivalent stress is reduced by 48.73.4 the method of sample interpolation fitting is proposed to optimize the structural parameters of the deep hole modified roller.The optimum modification degree and depth of suspension bearing roller are determined. The optimum modification scheme is obtained according to the working conditions of this paper. The maximum contact stress is reduced by 27.80 and the maximum equivalent stress is reduced by 37.00 parts.It is evaluated comprehensively with the modified logarithmic busbar modification scheme. The enterprise can select the optimized scheme 5 through Solidworks secondary development to realize the automatic modeling function of the parameter driven roller based on the improved modification theory.A friendly man-machine interface is developed, which simplifies calculation, improves modeling efficiency and facilitates subsequent use.Through the research on the theory of roller modification of the rotary tail tube suspension bearing, the force effect of the roller has been improved, the service life of the bearing has been improved to a certain extent, and the performance of the rotary tail tube suspension has been improved.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE925.2

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