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CLC number: TD422

On-line Access: 2016-05-04

Received: 2015-02-20

Revision Accepted: 2015-05-22

Crosschecked: 2016-04-07

Cited: 0

Clicked: 2004

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Srđan M. Bošnjak

http://orcid.org/0000-0002-6571-8836

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Journal of Zhejiang University SCIENCE A 2016 Vol.17 No.5 P.353-365

10.1631/jzus.A1500037


Basic parameters of the static stability, loads and strength of the vital parts of a bucket wheel excavator’s slewing superstructure


Author(s):  Srđan M. Bošnjak, Nebojša B. Gnjatović, Sreten D. Savićević, Milorad P. Pantelić, Ivan Lj. Milenović

Affiliation(s):  Faculty of Mechanical Engineering, University of Belgrade, Belgrade 11120, Serbia; more

Corresponding email(s):   sbosnjak@mas.bg.ac.rs

Key Words:  Bucket wheel excavator (BWE), Slewing superstructure, Parameters of the static stability, Loads, Strength


Srđan M. Bošnjak, Nebojša B. Gnjatović, Sreten D. Savićević, Milorad P. Pantelić, Ivan Lj. Milenović. Basic parameters of the static stability, loads and strength of the vital parts of a bucket wheel excavator’s slewing superstructure[J]. Journal of Zhejiang University Science A, 2016, 17(5): 353-365.

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author="Srđan M. Bošnjak, Nebojša B. Gnjatović, Sreten D. Savićević, Milorad P. Pantelić, Ivan Lj. Milenović",
journal="Journal of Zhejiang University Science A",
volume="17",
number="5",
pages="353-365",
year="2016",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1500037"
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%T Basic parameters of the static stability, loads and strength of the vital parts of a bucket wheel excavator’s slewing superstructure
%A Srđan M. Bošnjak
%A Nebojša B. Gnjatović
%A Sreten D. Savićević
%A Milorad P. Pantelić
%A Ivan Lj. Milenović
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1500037

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A1 - Srđan M. Bošnjak
A1 - Nebojša B. Gnjatović
A1 - Sreten D. Savićević
A1 - Milorad P. Pantelić
A1 - Ivan Lj. Milenović
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1500037


Abstract: 
Determining a bucket wheel excavator (BWE)’s slewing superstructure weight and its center of gravity (COG) is of extreme importance not only in the design phase, but also after the completion of the erection process and during the operation of the machine. This paper presents a critical comparative analysis of the basic parameters of the static stability of a BWE 1600 superstructure, with the parameters being obtained by both analytical and experimental procedures. The analysis shows that a relatively small difference in superstructure mass, obtained by calculation, leads to a relatively large unfavorable shifting of its COG, necessitating a significant increase in counterweight mass for balancing. A procedure for superstructure 3D model mass correction is presented based on results obtained by weighing after the completion of the erection process. The developed model provides enough accuracy to determine the superstructure’s COG in the entire domain of the bucket wheel boom inclination angle, and enables accurate load analysis of the superstructure’s vital parts. The importance of this analysis is reinforced by the finding that the procedure prescribed by standard DIN 22261-2 gives results which are not on the side of safety, as shown by an example of strength analysis of a bucket wheel boom stays’ end eyes.

斗轮挖掘机回转支承上部结构中关键部件的静态稳定性基本参数、负载和强度研究

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。

关键词:斗轮挖掘机;回转支承上部结构;静态稳定性参数;负载;强度

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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