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根据以往設計中体会,在机务段选用超重机时,存在着两个問題: 第一、在什么条件下选用什么类型的超重机?目前生产的和在产品样本中所能查到的超重机共有箱形結构、三角形断面、开式单腹板等三种电动桥式起重机和电动单梁起重机等四个类型。第二、在什么条件下选用什么工作制度的超重机?工作制度共分成輕级пB15％、中級пB25％、和重级пB40％三种工作制度。在具体設計中如何根据使用的安全性、投資的合理性和維修保养等方面正确选用。 現分成以下三个方面来談談对这两个問題的浅見。一、各型起重机的优缺点及今后生产动态
According to the experience in the past design, there are two problems when choosing overweight machine in the locomotive depot. First, under what conditions, what type of overweight machine should be used? Currently produced overweight machine which can be found in the product sample Box-shaped structure, triangular section, open single web and other three kinds of electric bridge crane and electric single-girder crane and other four types. Second, under what conditions, what kind of work system should be used for the overweight machine? The working system is divided into three working systems of light grade, intermediate grade, and secondary grade. In the specific design of how to use according to the safety, investment rationality and maintenance of the correct selection. Now divided into the following three aspects to talk about these two issues humble opinion. First, the advantages and disadvantages of various types of cranes and production dynamics in the future