塔式起重机起重力矩特性的计算和调整

针对目前双吊点臂塔机起重力矩曲线的理论值与实测值误差较大的现实,根据塔式起重机力矩限制器的作用机理,指出常用起重机起重力矩特性方程的局限性,对双吊点吊臂塔式起重机是不准确的。本文通过力学分析提出双吊点吊臂塔式起重机的起重力矩特性的计算方法,并通过程序实现之,从而解决了双吊点塔机的起重力矩曲线绘制的理论,并提出了实际应用中对理论曲线调整的方法,最后作为实例给出了用程序和常规算法计算42m双吊点臂QTZ315塔机的起重力矩特性表。

Calculation and Adjustment on Load Moment of Tower Cranes

For the tower crane with double-suspension jib, there exists large error between the theoretical torque value obtained form the lifting torque curve and the actually measuring,which stems form that the lifting torque equation in common use is to suitable for it according to the torque limiter's operational mechanism. In response to it this paper analyses the forces exerted on the tower crane with double-suspension jib and proposes the perfect method for determining its lifting torque curve. Last give tow kinds of lifting torque curve for the QTZ315 tower crane with 42-meter jib.