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本文原是甘肃省电力建设公司100吨/1400吨·米塔式起重机设计计算书的附件。文中提供了按“等应力”法计算上转柱式塔式起重机不同幅度时的额定载荷的理论依据。我们认为:“等力矩”法的出发点是使塔式起重机转柱的水平回转支承部件在不同幅度时受力相等,而“等应力”法的出发点则是使转柱式塔身部分的应力在不同幅度时相等。在水平回转支承部件强度足够的前提下(当然也应保证稳定性及起重臂等部件的强度足够),采用所述的“等应力”法,可以充分利用转柱式塔身材料的强度,因而是合理的。用“等应力”法计算后增大了起重机在大幅度时的额定起重量,对现场起吊作业很有实用价值。我国各火电厂工地广泛使用的TQ1000/60型上转柱式塔式起重机过去按“等力矩”法计算,今后也可试按所述“等应力”法计算,并确定起重特性曲线。本刊特征得作者同意将本文发表,以供有关单位参考。
This article was originally Gansu Provincial Electric Power Construction Company 100 tons / 1400 tons · m tower crane design calculations book Annex. The paper provides the theoretical basis for calculating the rated load of the tower crane with different amplitude according to “equal stress” method. In our opinion, the “equal torque” method is based on the assumption that the horizontal slewing bearing components of the tower crane column are equal in different amplitudes, while the “equal stress” method is based on the assumption that the stress of the tower mast section Equal in different amplitude. Under the condition that the strength of the horizontal slewing bearing is sufficient (of course, the stability and the strength of components such as the boom are also sufficient), the “equal stress” method can fully utilize the strength of the slewing tower body material, It is reasonable. After calculating with “equal stress” method, the rated lifting capacity of the crane at large amplitude is increased, which is of great practical value for lifting work on site. TQ1000 / 60 tower crane used widely in various thermal power plant sites in China was calculated according to the “equal torque” method in the past. In the future, the TQ1000 / 60 hoisting tower crane may also be calculated according to the “equal stress” method and the lifting characteristic curve can be determined. The characteristics of the author’s author agreed to publish this article, for the reference of the relevant units.