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塔机起升机构的起升速度,视载荷、使用作业要求而异,因此起升速度要有较大的调速范围。在QTZ40型塔机的起升机构中,应用电磁离合器与减速器内的齿轮相组合,采用变换电磁离合器来改变减速器速比的方法进行变速,再配以涡流制动器,得到了较大的调速范围。本文就电磁离合器在起升机构中的应用及选择计算作一介绍。一、离合器的选择电磁离合器应按动摩擦力矩、静摩擦力矩、连结功进行选择计算。首先根据起重机的使用场合及离合器在
The lifting speed of the tower crane lifting mechanism varies depending on the load and operation requirements, so the lifting speed must have a large speed range. In the hoisting mechanism of the QTZ40 tower crane, the electromagnetic clutch is used in combination with the gear in the speed reducer, and the electromagnetic clutch is used to change the speed ratio of the speed reducer. The speed is changed, and the eddy current brake is added to obtain a larger adjustment. Speed range. This article gives an introduction to the application and selection of electromagnetic clutch in the lifting mechanism. First, the choice of clutch Electromagnetic clutch should be based on dynamic friction torque, static friction torque, connected work for selection calculations. First according to the use of the crane and the clutch