考虑间隙的隧道掘进机主轴承结构优化

IF 2.2 3区 工程技术 Q2 ENGINEERING, MECHANICAL Journal of Tribology-transactions of The Asme Pub Date : 2023-11-07 DOI:10.1115/1.4064019
Xinqi Wang, Wei Sun, Lintao Wang, Shihu Liang, Xiaokai Mu
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引用次数: 0

摘要

摘要提出了隧道掘进机主轴承的优化设计方法。该方法以疲劳寿命为目标函数。结构参数,包括间隙,被认为是设计变量。首先,建立了主轴承的准静态模型和疲劳寿命计算模型。通过与有限元法计算结果的比较,验证了理论方法的正确性。其次,分析了外载荷作用下间隙对承载性能的影响。有一个最佳的负间隙轴向加载和径向行。随着外载荷的增大,最优负间隙逐渐减小。受轴向间隙影响的轴向载荷和支承列承载性能变化规律主要取决于主轴承的偏载程度。最后,在主轴承优化设计模型的基础上,利用遗传算法得到了最优的内部结构。优化后的疲劳寿命提高了92.2%。与初始设计相比,优化后的主轴承的承载性能也得到了显著提高。因此,所提出的优化方法为主轴承设计提供了一种实用的方法。
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Structural optimization of the main bearing in a tunnel boring machine considering clearance
Abstract An optimal design method for the main bearing of a tunnel boring machine is proposed. In this method, the fatigue life is used as the objective function. Structural parameters, including clearance, are considered design variables. First, a quasi-static model of the main bearing and a calculation model of the fatigue life are established. The correctness of the theoretical method is verified by comparing it with the calculation results of the finite element method. Next, the influence of clearance on the load-carrying performance under external loads is analyzed. There is an optimal negative clearance for the axial loaded and radial rows. With the increase in the external loads, the optimal negative clearance gradually decreases. The variation laws of the load-carrying performance for the axial loaded and supporting rows affected by axial clearance mainly depend on the bias load degree of the main bearing. Finally, based on the optimal design model of the main bearing, the optimal internal structure is obtained using the genetic algorithm. The optimized fatigue life is improved by 92.2%. The load-carrying performance of the optimal main bearing has also been significantly enhanced compared to the initial design. Therefore, the proposed optimization method provides a practical approach to the main bearing design.
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来源期刊
Journal of Tribology-transactions of The Asme
Journal of Tribology-transactions of The Asme 工程技术-工程:机械
CiteScore
4.20
自引率
12.00%
发文量
117
审稿时长
4.1 months
期刊介绍: The Journal of Tribology publishes over 100 outstanding technical articles of permanent interest to the tribology community annually and attracts articles by tribologists from around the world. The journal features a mix of experimental, numerical, and theoretical articles dealing with all aspects of the field. In addition to being of interest to engineers and other scientists doing research in the field, the Journal is also of great importance to engineers who design or use mechanical components such as bearings, gears, seals, magnetic recording heads and disks, or prosthetic joints, or who are involved with manufacturing processes. Scope: Friction and wear; Fluid film lubrication; Elastohydrodynamic lubrication; Surface properties and characterization; Contact mechanics; Magnetic recordings; Tribological systems; Seals; Bearing design and technology; Gears; Metalworking; Lubricants; Artificial joints
期刊最新文献
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