Posture and Dynamics Analysis of Hydraulic Support with Joint Clearance under Impact Load

被引:7
作者
Zeng, Qingliang [1 ,2 ]
Xu, Penghui [1 ]
Meng, Zhaosheng [3 ]
Ma, Chen [1 ]
Lei, Xiaowan [1 ]
机构
[1] Shandong Univ Sci & Technol, Sch Mech & Elect Engn, Qingdao 266590, Peoples R China
[2] Shandong Normal Univ, Sch Informat Sci & Engn, Jinan 250358, Peoples R China
[3] Shandong Univ Sci & Technol, Sch Energy & Min Engn, Qingdao 266590, Peoples R China
关键词
impact load; hydraulic support; joint clearance; dynamics analysis; posture analysis; rigid-flexible coupling;
D O I
10.3390/machines11020159
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A hydraulic support is one of the key pieces of equipment in a fully mechanized coal-mining face. The shaft is seriously worn due to repeated support shifting in coal-mining operations, and the hydraulic support bears a large amount of impact load in the support process, leading to a threat to its dynamic stability. In order to study the impact load on the posture and dynamics of a hydraulic support, and considering the joint clearance of the hydraulic-support hinge point, based on the dynamics software Adams, the equivalent variable-stiffness damping system is used to replace the column, and the impact analysis model of the hydraulic support with joint clearance is established. The roof pressure is vertically applied to the load balance area of the top beam by static load, and the impact load is vertically applied to the top beam downward. Based on the above model, considering the different distributions of joint clearance, research about the influence of joint clearance on the posture and dynamic characteristics of the hydraulic support is carried out. The results show that when there is joint clearance on both sides of the hydraulic support, when the top beam bears the impact load, the X-axis PMR (position movement ratio) at different positions of the top beam is more than 80%, and the forward-tilt posture is obvious. When the hydraulic support has only unilateral clearance, the front end of the top beam bears the impact load, and the front end of the top beam moves laterally, while the rear end of the top beam mainly moves longitudinally. When the end of the top beam bears the impact load, the vertical PMR of the top beam is less than 1%. When the impact load acts on the side with joint clearance, the top beam has a certain degree of lateral offset, and the offset directions on both sides of the top beam are inconsistent. At this time, the top beam presents a torsional-bearing posture. When the front end of the top beam is loaded, the mechanical curve of each hinge point is higher than the rear-end load. For the hinge point on the side without clearance, the maximum load-fluctuation coefficient reaches 1.04, while for the hinge point on the side with clearance, the minimum load is 0 kN, which will mean some hinge points cannot to play a supporting role. The analysis results will be helpful to research hydraulic supports considering joint clearance.
引用
收藏
页数:17
相关论文
共 26 条
[1]   Reducing undesirable vibrations of planar linkage mechanism with joint clearance [J].
Bai, Zheng Feng ;
Jiang, Xin ;
Li, Fei ;
Zhao, Ji Jun ;
Zhao, Yang .
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, 2018, 32 (02) :559-565
[2]  
[鲍永生 Bao Yongsheng], 2020, [煤炭科学技术, Coal Science and Technology], V48, P55
[3]   Dynamic modeling and responses investigation of spatial parallel robot considering lubricated spherical joint [J].
Chen, Xiulong ;
Jia, Yonghao .
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS, 2022, 92
[4]  
Du Y., 2017, J CHINA COAL SOC, V42, P260
[5]   Effects of Joint Clearance on the Motion Accuracy of Robotic Manipulators [J].
Erkaya, Selcuk .
STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING, 2018, 64 (02) :82-94
[6]   Dynamic model analysis of hydraulic support [J].
Guan, Enguang ;
Miao, Huihua ;
Li, Peibo ;
Liu, Jihao ;
Zhao, Yanzheng .
ADVANCES IN MECHANICAL ENGINEERING, 2019, 11 (01)
[7]   Dynamic modelling and properties analysis of 3RSR parallel mechanism considering spherical joint clearance and wear [J].
Hou, Yu-lei ;
Deng, Yun-jiao ;
Zeng, Da-xing .
JOURNAL OF CENTRAL SOUTH UNIVERSITY, 2021, 28 (03) :712-727
[8]  
[敬谦 Jing Qian], 2021, [振动与冲击, Journal of Vibration and Shock], V40, P32
[9]  
[康红普 Kang Hongpu], 2018, [煤炭学报, Journal of China Coal Society], V43, P1789
[10]  
[梁利闯 Liang Lichuang], 2015, [煤炭学报, Journal of China Coal Society], V40, P2522