|Table of Contents|

Design and analysis of fatigue test bench for excavator working equipment with multiple test positions and load self-balancing function(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2024年6期
Page:
145-158
Research Field:
机械与汽车工程
Publishing date:

Info

Title:
Design and analysis of fatigue test bench for excavator working equipment with multiple test positions and load self-balancing function
Author(s):
WANG Bin-hua1;  CHENG Xiao-gang1;  LIU Chang-sheng2;  LIU Qiang2;  ZHAO Xin1
(1. Key Laboratory of Road Construction Technology and Equipment of Ministry of Education,Chang'an University, Xi'an 710064, Shaanxi, China; 2. Sunward Intelligent Equipment Co. Ltd., Changsha 410100, Hunan, China)
Keywords:
mechanical engineering;  excavator working device;  fatigue bench test;  finite element analysis;  fatigue life
PACS:
U415.51
DOI:
10.19721/j.cnki.1671-8879.2024.06.014
Abstract:
Due to the fact that the existing fatigue test bench is only suitable for fatigue testing of a certain model of excavator boom and bucket, it results in low resource utilization and high testing costs. A self-balancing fatigue test bench suitable for various types of excavator working devices was designed. Firstly, the fatigue test was conducted on excavator working devices with a total weight of 6, 8, 20 t. Based on the design requirements and mechanical principles, the structural design of a multi-station self-balancing excavator working device fatigue test bench was completed. Secondly, based on the finite element theory, the structural strength and the stiffness analysis of the fatigue test bench under the ultimate load were carried out. Thirdly, based on the hot spot stress method and nominal stress method, fatigue life assessment was carried out on the welded joint structure, bolt group,and suspension rod, and the influecnce of preload on the fatigue life of the suspension rod was analyzed and studied. Finally, the fatigue test of 20 t excavator arm was performed. The results show that the fatigue test bench that designed can be used for fatigue testing loading of various types of excavator working devices, improving the universality of the fatigue test bench. The rationality and effectiveness of the design of the fatigue test bench have been verified.11 tabs, 22 figs, 27 refs.

References:

[1] 《中国公路学报》编辑部.中国筑路机械学术研究综述·2018[J].中国公路学报,2018,31(6):1-164.
Editorial Department of China Journal of Highway and Transportation.Academic research review of road construction machinery in China 2018[J].China Journal of Highway and Transportation,2018,31(6):1-164.
[2]张 云,张 杰,魏宇明.国内外步履式挖掘机的发展及现状[J].建设机械技术与管理,2020,33(3):67-70.
ZHANG Yun,ZHANG Jie,WEI Yu-ming.Development and present situation of walking excavators at home and abroad[J].Construction Machinery Technology & Management,2020,33(3):67-70.
[3]于爱玲,赵丽媛.中国挖掘机械行业如何穿越周期?[J].建筑机械,2021(2):10-13.
YU Ai-ling,ZHAO Li-yuan.How does China's mining machinery industry navigate through cycles?[J].Construction Machinery,2021(2):10-13.
[4]JIANG T,LIU X B.Fatigue research on excavator boom driven by real loads[J].Applied Mechanics and Materials,2014,488/489:1057-1060.
[5]王斌华,向清怡,陈一馨,等.挖掘机结构疲劳可靠性研究现状及展望[J].长安大学学报(自然科学版),2022,42(1):115-126.
WANG Bin-hua,XIANG Qing-yi,CHEN Yi-xin,et al.Fatigue reliability analysis of excavator structure:A state-of-the-art review and future research[J].Journal of Chang'an University(Natural Science Edition),2022,42(1):115-126.
[6]王智森,汪兆栋,张少怀.液压挖掘机动臂结构优化设计[J].中国工程机械学报,2022,20(1):75-80.
WANG Zhi-sen,WANG Zhao-dong,ZHANG Shao-huai.Structural optimization design of hydraulic excavator arm[J].Chinese Journal of Construction Machinery,2022,20(1):75-80.
[7]高月华,高振方,秦淑华.R961型液压挖掘机斗杆载荷谱[J].工程机械,1980,11(9):32-38.
GAO Yue-hua,GAO Zhen-fang,QIN Shu-hua.Load spectrum of arm of R961 hydraulic excavator[J].Construction Machinery and Equipment,1980,11(9):32-38.
[8]汪慈荪,高振方,孙志杰.液压挖掘机工作装置疲劳强度的试验研究[J].工程机械,1983,14(6):19-23,15.
WANG Ci-sun,GAO Zhen-fang,SUN Zhi-jie.Experimental study on fatigue strength of working device of hydraulic excavator[J].Construction Machinery and Equipment,1983,14(6):19-23,15.
[9]石来德,曹善华,俞丽萍.单斗液压挖掘机模型模拟试验加载谱的研究[J].同济大学学报(自然科学版),1992,20(4):395-402.
SHI Lai-de,CAO Shan-hua,YU Li-ping.The study of loading spectrum of model test for hydraulic excavator[J].Journal of Tongji University(Natural Science),1992,20(4):395-402.
[10]陈 健,易隆辉,周 鑫,等.液压挖掘机工作装置疲劳试验方法:中国,CN101025389A[P].2007-08-29.
CHEN Jian,YI Long-Hui,ZHOU Xin,et al.Fatigue test method of hydraulic excavator working device:China,CN101025389A[P].2007-08-29.
[11]张卫国,权 龙,程 珩,等.真实载荷驱动下挖掘机工作装置疲劳寿命研究[J].农业机械学报,2011,42(5):35-38,105.
ZHANG Wei-guo,QUAN Long,CHENG Heng,et al.Fatigue analysis on working device of excavator driven by practical load[J].Transactions of the Chinese Society for Agricultural Machinery,2011,42(5):35-38,105.
[12]滕毅敏.挖掘机工作装置的载荷谱测试研究[D].杭州:浙江大学,2012.
TENG Yi-min.Study on load spectrum test of excavator[D].Hangzhou:Zhejiang University,2012.
[13]姜 涛,刘雄斌,周广萍.实测载荷驱动下挖掘机动臂的疲劳寿命研究[J].中国工程机械学报,2014,12(3):268-272.
JIANG Tao,LIU Xiong-bin,ZHOU Guang-ping.Fatigue life study on excavator booms under actual loading[J].Chinese Journal of Construction Machinery,2014,12(3):268-272.
[14]秦 威,赵 刚,江志刚,等.液压挖掘机工作装置的载荷谱测试研究[J].机械设计与制造,2018(3):226-229.
QIN Wei,ZHAO Gang,JIANG Zhi-gang,et al.Load spectrum test research on working device of hydraulic excavator[J].Machinery Design & Manufacture,2018(3):226-229.
[15]杜敏杰.基于载荷谱的挖掘机斗杆疲劳寿命预测研究[D].北京:机械科学研究总院,2018.
DU Min-jie.Study on fatigue life prediction of excavator stick based on load spectrum[D].Beijing:General Academy of Mechanical Sciences,2018.
[16]周利东,韩亮亮,王 雷,等.挖掘机斗杆模拟加载试验研究[J].机械设计,2020,37(1):110-115.
ZHOU Li-dong,HAN Liang-liang,WANG Lei,et al.Study on the loading test of the excavator's bucket arm[J].Journal of Machine Design,2020,37(1):110-115.
[17]向清怡,吕彭民,王斌华,等.液压挖掘机工作装置载荷谱测试方法[J].中国公路学报,2017,30(9):151-158.
XIANG Qing-yi,LU Peng-min,WANG Bin-hua,et al.Load spectrum test method of hydraulic excavator working device[J].China Journal of Highway and Transport,2017,30(9):151-158.
[18]向清怡,吕彭民,王斌华,等.液压挖掘机斗杆台架疲劳试验载荷等效方法[J].中国公路学报,2018,31(6):317-326.
XIANG Qing-yi,LU Peng-min,WANG Bin-hua,et al.Load equivalent method for fatigue bench test of hydraulic excavator stick[J].China Journal of Highway and Transport,2018,31(6):317-326.
[19]王斌华,邵雨虹,罗佳佳,等.一种大型悬臂式承载结构的自平衡式抗疲劳试验台:中国,CN107255599B[P].2019-09-20.
WANG Bin-hua,SHAO Yu-hong,Luo Jia-jia et al.A fatigue test bench for a large cantilever load-bearing structure with load self balancing function:China,CN107255599B[P].2019-09-20.
[20]T/CCMA 0072—2019,挖掘机动臂疲劳寿命试验方法[S].
T/CCMA 0072—2019,Test method of fatigue life for excavator boom[S].
[21]T/CCMA 0073—2019,挖掘机斗杆疲劳寿命试验方法[S].
T/CCMA 0073—2019,Test method of fatigue life for excavator bucket arm[S].
[22]揭志羽,李亚东,卫 星,等.复杂应力场下焊接接头疲劳寿命评估的热点应力法[J].中国公路学报,2017,30(5):97-103.
JIE Zhi-yu,LI Ya-dong,WEI Xing,et al.Hot spot stress method for fatigue life assessment of welded joints under complex stress fields[J].China Journal of Highway and Transport,2017,30(5):97-103.
[23]HOBBACHER A F.Recommendations for fatigue design of welded joints and components[M].Berlin:Springer International Publishing AG,2016.
[24]LI Y,LU P M,WANG B H,et al.Failure analysis of bolts on fatigue test bench for excavator stick[J].Engineering Failure Analysis,2020,118:104863.
[25]《机械工程材料性能数据手册》编委会.机械工程材料性能数据手册[M].北京:中国标准出版社.机械工业出版社,1994.
《Mechanical Engineering Material Properties Data Manual》 editorial board.Mechanical engineering material properties data manual[M].Beijing:Standards Press of China,China Machine Press,1994.
[26]雷宏刚,裴 艳,刘丽君.高强度螺栓疲劳缺口系数的有限元分析[J].工程力学,2008,25(增1):49-53,81.
LEI Hong-gang,PEI Yan,LIU Li-jun.Finite element analysis of fatigue Notch coefficient of high strength bolts[J].Engineering Mechanics,2008,25(S1):49-53,81.
[27]邱 斌.设置悬挂吊车平板网架结构的疲劳载荷谱及疲劳寿命研究[D].太原:太原理工大学,2021.
QIU Bin.Study on fatigue load spectrum and fatigue life of the plate-type grid structure with suspension cranes[D].Taiyuan:Taiyuan University of Technology,2021.

Memo

Memo:
-
Last Update: 2024-12-30