双片剪刀撑液压升降平台同步技术的探讨

Inquiry of synchronization of hydraulic elevators with twin scissors-truss support

对双片剪刀撑液压升降平台的多种同步技术方案进行了分析比较;对典型的内(外)置位置传感器反馈闭环系统控制方案中用到的运动关系给出了推导结果.提出了串联式偏置同步拉杆结构的同步方案及其受力支点布局的要点,解决了此类设备运行不同步,尤其是停靠过程偏置下沉造成的台面变形、设备损坏的隐患.

Various synchronization schemes of the hydraulic elevators with twin scissors-truss support are analyzed and compared to each other. The kinematics relationship used in their closed-loop system control with typical built-in (or external) position feedback is derived. A synchronization scheme with the configuration of serial offset synchronous levers is proposed and the key points of the disposition of force-supports are indicated out, so that the asynchronous happened in such kind of equipments, especially the platform deformation due to offset descending in the process of platform landing, is eliminated.