不同工况下剪升机构的刚体倾翻稳定性研究  

Research on the Tip-over Stability of Rigid Scissor Lift for Different Possible Scenarios

作　　者：张威[1,2] 赵江波[1] 

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]中国民航大学航空地面特种设备研究基地,天津300300

出　　处：《机床与液压》2016年第9期77-80,共4页Machine Tool & Hydraulics

基　　金：国家自然科学基金委员会与中国民航局联合资助项目(U1233106);中央高校基本科研业务费专项资金资助项目(ZXH2012H007);中国民航大学校级科研项目(2012KYE05)

摘　　要：在工人作业过程中,由于剪升机构的倾翻常常造成工人的伤亡,因此研究在作业过程中剪升机构的稳定性是必不可少的。针对剪升机构在作业过程中不同的工况对其倾翻的临界条件进行了理论计算和ADAMS建模仿真,并对理论与仿真结果进行了对比分析,分析表明其误差率小于1%,验证了仿真结果的正确性。利用ADAMS仿真了工人的安全绳连接在不同点处的坠落试验,根据轮子的离地间隙,得到了2点处轮子为安全绳连接最危险的点。最后基于不同的工况分析了导致倾翻的影响因素,结果表明:较大的轮距能够提高剪升机构的抗侧向倾翻稳定性;随着支臂举升角的增大,剪升机构的重心在不断上升并向左移动,其倾翻稳定性也随之下降;安全绳连接点的位置不同,对剪升机构的冲击也不同,其倾翻情况也不同。The tip-over of scissor lift in operation has frequently resulted in the severe injures of workers,so it is indispensable to research the tip-over stability of scissor lift. The objective of this study was to calculate the tip-over threshold theoretically and to simulate based on ADAMS for different possible tip-over scenarios during the process of operations,and the comparative analyses between theoretical results and simulation were conducted. The analyses show that the error rate is less than 1%,and the accuracy of the simulation is also verified. The drop tests of worker in different anchorage points of the rope were simulated in ADAMS,according to the clearance between wheels and the ground,the most dangerous anchorage point was obtained as shown in point 2. Finally,the factors which have influences on scissor lift tip-over stability were analyzed for different scenarios. The results show that larger tread can improve the lateral tipover stability of scissor lift; the center of gravity of scissor lift is rising gradually and moving to the left,which can lead to the decline of stability; the impact to scissor lift is different when the locations of the rope change,which will result in different tip-over situations.

关 键 词：剪升机构 倾翻稳定性 工况 ADAMS 

分 类 号：TH112[机械工程—机械设计及理论]