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直臂架在火电厂安装塔式起重机和水电站混凝土浇筑起重机中得到了广泛的应用,因此合理设计直臂架,以减轻臂架自身重量是值得重视的问题。减轻臂架的重量除了在材料上采用高强度合金钢,结构形式上采用管子结构外,减少臂架自身弯矩的影响也是主要途径之一,特别对长臂架显得更为重要。我们从表1的几种起重机的自重弯矩影响可看出,在最大幅度及相应的额定起重量(简称大幅度小起重量)时自重弯矩引起的上
The straight boom has been widely used in the installation of tower cranes and concrete pouring cranes in thermal power plants. Therefore, it is worth to pay attention to the rational design of the straight boom to reduce the weight of the boom itself. To reduce the weight of the boom In addition to using high-strength alloy steel in the material, the structural form of the pipe structure, reducing the impact of the arm itself is one of the main ways, especially for the long boom is even more important. We can see from Table 1, several kinds of crane self-weight bending moment can be seen in the maximum amplitude and the corresponding rated lifting capacity (referred to as significant small lifting weight) caused by the weight moment