摘要
针对高空作业平台变幅机构液压缸的推力计算问题,对该设备中六铰点变幅机构的理论计算方法进行了对比分析,归纳总结了现有理论计算方法中的误差原因,提出了一种更偏于安全的计算思路。分别利用力矩平衡原理、虚位移原理进行了推导演算;在虚位移原理的求解中,将该原理具体分为整体解析法和分点解析法两种子方法,并将3种方法的推导结果代入到某具体型号的六铰点变幅机构中,通过实验对其结果进行了验证。研究结果表明:不同的误差因素会造成不同的计算数值,选取计算结果中的最大值可以有效提高机构的安全性能;上述分析可推广到其他变幅机构的理论计算中,为虚位移原理的应用提供参考。
Aiming at the problem of calculating the thrust of hydraulic cylinder of luffing mechanism for high-altitude platform,the theoretical calculation methods of luffing mechanism of six hinge points was compared and analyzed.The error reasons of existing theoretical calculation methods was summarized,and a safer calculation idea was put forward.The moment balance method and the virtual displacement method were used for calculation.The method of the virtual displacement principle was classified,respectively using the whole analytical method and the fractional analytical method to calculate.The derivation results of the three methods were taken into a specific model of the six-hinge point luffing mechanism for verification.The results indicate that different error factors will lead to different calculation values.The safety perform-ance of the mechanism can be improved effectively through selecting the maximum value in the calculation results.The above method can be extended to the theoretical calculation of other luffing mechanism,and provides a reference for the application of the virtual work principle.
作者
刘文羿
何雪浤
谢里阳
周振东
LIU Wen-yi;HE Xue-hong;XIE Li-yang;ZHOU Zhen-dong(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China;Jiangsu Eastman Heavy Machinery Co.,Ltd.,Kunshan 215334,China)
出处
《机电工程》
CAS
北大核心
2020年第1期14-19,共6页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金委员会-辽宁省人民政府联合基金资助项目(U1708255)
关键词
六铰点变幅机构
液压缸推力
虚位移原理
高空作业平台
six-point luffing mechanism
hydraulic cylinder driving force
principle of virtual work
high-altitude platform
