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目的:斗轮挖掘机回转支承上部结构的重量和重心位置不仅在设计过程中非常重要,在斗轮挖掘机组装完成后和运转时同样重要。本文旨在研究各参数对重心位置的影响。方法:1.分析比较由数值模拟和实验得到的静态稳定性基本参数;2.构建上部结构的3D模型(图1~3),并根据斗轮挖掘机组装完成后的重量分布对模型进行质量修正;3.对上部结构进行负载和应力分析。结论:1.上部结构一个较小的质量变化(1.5%)会导致重心位置一个较大的变化(902 mm),从而不得不明显增加配重的重量(24 t)来保持平衡;2.构建的3D模型可以得到精确的上部结构重量分布和重心位置;3.由DIN 22261-2标准规定的眼板应力被证明并不安全。
Purpose: The weight and center of gravity of the slewing ring superstructure of the bucket wheel excavator are not only important in the design process, but also important to the operation of the bucket wheel excavator once it is assembled. The purpose of this paper is to study the effect of each parameter on the location of the center of gravity. Methods: 1. Analyze and compare the basic parameters of static stability obtained from numerical simulation and experiment; 2. Construct the 3D model of the superstructure (Figures 1 to 3), and make the model quality according to the weight distribution after the bucket wheel excavator is assembled Correction; 3. Load and stress analysis of the superstructure. CONCLUSIONS: 1. A small change in mass (1.5%) of the superstructure results in a large change in center of gravity (902 mm), necessitating a significant increase in weight (24 t) to maintain balance; 2. Building The 3D model allows for accurate superstructure weight distribution and center of gravity position; 3. Eye plate stress as specified by the DIN 22261-2 standard proves to be unsafe.