采煤机摇臂动态特性及影响因素分析

张义民, 张睿, 朱丽莎, 赵春雨

振动与冲击 ›› 2018, Vol. 37 ›› Issue (9) : 114-119.

PDF(1958 KB)
PDF(1958 KB)
振动与冲击 ›› 2018, Vol. 37 ›› Issue (9) : 114-119.
论文

采煤机摇臂动态特性及影响因素分析

  • 张义民, 张睿, 朱丽莎, 赵春雨
作者信息 +

Dynamic characteristics and influence factors of a shearer’s rocker arm

  • ZHANG Yi-min, ZHANG Rui, ZHU Li-sha, ZHAO Chun-yu
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文章历史 +

摘要

针对采煤机摇臂在截割载荷作用下可靠性差的问题,对MG500/1180-WD采煤机摇臂动态特性进行分析。建立摇臂有限元模型,通过模态分析得到摇臂固有频率及主振型。模态分析表明,摇臂主要振动模式为电机壳体及行星头弯曲扭转振动。通过实验模态分析,以固有频率为判定指标,对有限元模型进行验证。选取电机壳体壁厚等5个设计变量,研究摇臂固有频率随设计变量的变化规律。根据重载截割实际工况对摇臂进行谐响应分析,计算摇臂振动响应。结果表明:摇臂中部老塘侧壁厚是影响摇臂固有特性的关键因素;摇臂在行星1级2倍频、直齿1级2倍频、直齿2级2倍频及8阶固频激励下动态应力较大;采煤机摇臂形成了以1、3阶振型模态振动为主要特征的弹性振动并导致摇臂铰接耳处产生应力集中;分析结果可为采煤机摇臂结构优化设计及可靠性分析提供参考。

Abstract

The dynamic characteristics of MG500/1180-WD shearer’s rocker arm were studied aiming at the problem of its poor reliability under cutting loads. The simplified finite element (FE) model for the arm was established and its natural frequencies and main modal shapes were obtained with modal analysis. Modal analysis showed that the main vibration modes of the arm are bending-torsional vibration of planet head and motor shell. Through test modal analysis, taking its natural frequencies as the judgement index, the FE model was validated. Choosing 5 design variables including motor shell’s wall thickness, etc., the variation law of the arm’s natural frequencies with the design variables was studied. Harmonic response analysis for the arm was conducted under the condition of heavy cutting loads, and the vibration responses of the arm were calculated. The results showed that the thickness of old pond side wall in the middle of the arm is the key factor influencing the arm’s natural characteristics; the arm’s dynamic stresses are larger under loads with double of the planet’s 1st frequency, double of the spur gear’s 1st one, double of the spur gear’s 2nd one, and the 8th natural frequency; the arm’s elastic vibration mainly has features of its 1st and 3rd modal shapes to cause stress concentration at the arm hinge ear; the analysis results provide a reference for the optimal design and reliability analysis of a shearer’s rocker arm.

关键词

采煤机摇臂 / 实验模态分析 / 有限元 / 谐响应分析 / 固有特性

Key words

shearer’s rocker arm / test modal analysis / harmonic response analysis / finite element (FE) / natural characteristics

引用本文

导出引用
张义民, 张睿, 朱丽莎, 赵春雨. 采煤机摇臂动态特性及影响因素分析[J]. 振动与冲击, 2018, 37(9): 114-119
ZHANG Yi-min, ZHANG Rui, ZHU Li-sha, ZHAO Chun-yu. Dynamic characteristics and influence factors of a shearer’s rocker arm[J]. Journal of Vibration and Shock, 2018, 37(9): 114-119

参考文献

[1]Zaghbani I,SongmeneV.Estimation of machine-tool dynamic parameters during machining operation through operational modal analysis[J].International Journal of Machine Tools and Manufacture,2009,49:974-978.
[2] 刘长钊,秦大同,等.采煤机截割部机电传动系统动力学特性分析[J].机械工程学报,2016,52(7):15-22.
Liu Changzhao,Qin Datong. Dynamic characteristics analysis of mechanical and electrical transmission system of cutting part of Shear[J].Journal of Mechanical Engineering,2016,52(7):15-22.
[3] 赵丽娟,田震.薄煤层采煤机振动特性研究[J].振动与冲击,2015,23(3):229-231.
Zhao Lijuan,Tian Zhen.Vibration characteristics of thin coal seam shearer[J].Journal of Vibration and Shock,2015,34(1):196-199.
[4] 申宝宏,郭玉辉.我国综合机械化采煤技术装备发展现状与趋势[J]. 煤炭科学技术,2012,40(2):1-3.
Shen Baohong,GuoYuhui.Development status and tendency of technology and equipment for fully mechanized coal mining in China[J]. Coal Science and Technology,2012,40(2):1-3.
[5] 罗晨旭.滚筒采煤机开采含煤岩界面煤层截割特性研究[D]. 徐州:中国矿业大学,2015.
Luo Chenxu. Study on cutting characteristics of shearer mining coal seam with coal-rock interface[D].Xuzhou: China University of Mining and Technology,2013.
[6] 赵丽娟,马连伟.薄煤层采煤机可靠性分析与疲劳寿命预测[J]. 煤炭学报,2013,38(7):1288-1292.
Zhao Lijuan,Ma Lianwei.Thin seam shearer reliability analysis and fatigue life prediction[J].Journal of China Coal Society,2013,38(7):1288-1292.
[7] 张义民,黄婧,朱丽莎,等. 采煤机摇臂传动系统可靠性稳健优化设计[J].煤炭学报,2015,40(11):2540-2545.
Zhang Yimin,Huang Jing,Zhu Lisha.Robustreliability improvement design of rocker arm drive system of coal mining machine[J].Journal of China Coal Society,2015,40(11):2540-2545.
[8] 张世洪.我国综采采煤机技术的创新研究[J]. 煤炭学报,2010,35(11):1898-1902.
    Zhang Shihong.Study on the innovation of fully mechanized coal shearer technology in China[J].Journal of China Coal Society,2010,35(11):1898-1902.
[9] 李晓豁,李婷,焦丽,等.滚筒采煤机截割载荷的模拟系统开发及其模拟[J].煤炭学报,2016,41(2):503-507.
Li Xiaohuo,Li Ting,Jiao Li. Development of cutting load simulation system and its simulation study on drum shearers[J].Journal of China Coal Society,2016,41(2):503-507.
[10] 赵丽娟,刘旭楠,马联伟.基于经济截割的采煤机运动学参数优化研究[J]. 煤炭学报,2013,38(8):1490-1495.
Zhao Lijuan,Liu Xunan,Ma Lianwei. Optimization research on shearer’s kinematic parameters based on economical cutting[J].Journal of China Coal Society,2013,38(8):1490-1495.
[11] 杨阳,马鹏程.采煤机差动2K-H行星轮系固有特性分析[J].煤炭学报,2016,41(2):509-512.
    Yang Yang,Ma Pengcheng. Analysis of shearer 2K-H differential planetary gear train inherent characteristics[J].Journal of China Coal Society,2016,41(2):509-512.
[12] 肖正明,秦大同,等.土压平衡盾构机行星减速器动态特性测试与分析[J].振动与冲击,2012,31(9):156-159.
Xiao Zhengming,Qin Datong,Wu Wen-hui. Test and analysis of the dynamic performance of the earth pressure balance shield machine[J].Journal of Vibration and Shock,2012,31(9):156-159.
[13] 张力.机械振动实验与分析[M].北京:清华大学出版社,2013:78-86.
Zhang Li. Mechanical vibration test and analysis[M].Bei Jing:Tsinghua university press,2013:78-86.
[14] 常乐浩,贺朝霞,刘更,等.集平行轴齿轮传动系统动力学建模的有限单元法[J].振动与冲击,2016,35(20):48-53.
Chang Lehao,HeZhaoxia,LiuGeng. Dynamic modeling of parallel shaft gear transmissions using finite element method[J].Journal of Vibration and Shock,2016,35(20):48-53.
[15] 向玲,贾秩,李媛媛,等.内外激励作用下多自由度齿轮系统的非线性动力学特性[J].振动与冲击,2016,35(13):154-159.
Xiang Ling,JiaZhi,LiYuanyuan. Non-linear dynamic features of a gear system withmulti-DOF subjected to internal and external excitation[J].Journal of Vibration and Shock,2016,35(13):154-159.

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