臂架驱动双纽线型起重机变幅机构的受力分析和实现

摘要

The luffing mechanism of normal double-link type crane is in general use for portal slewing cranes and floating cranes.But,a new luffing mechanism of lemniscate type crane come to light.There are great differences in outward appearance,geometric shape,luffing performance between lemniscate type crane with boom driving and normal double-link type crane.Loading and unloading on-stream as well as at sea,lemniscate type cranes can handle both ship-to-ship and ship-to-shore operations swiftly and efficiently in the Netherlands.It's applied for European patent.The luffing mechanism of lemniscate type crane consists of boom,flying jib,back-rocker,but boom is driving.Based on theory of reverse engineering and mechanism,force characteristic of the luffing mechanism of lemniscate type crane with boom driving is studied.By sample analysis,the luffing mechanism of lemniscate type crane has good characteristic of force.%双纽线型起重机因其变幅轨迹近似为双纽线而得名.双纽线型起重机变幅机构的特点为臂架和后摇杆的活动范围大、几何形态特殊、整机重心高度低.运用逆向工程、机构学原理来分析该双纽线型起重机变幅机构的受力特性,经实例分析并在Matlab软件平台上实现,表明了该双纽线型起重机变幅机构具有良好的力学性能,非常适宜带载变幅作业.