齿轮齿条爬升式升船机驱动系统的电机功率计算方法

Research on calculation methods of motor power for driving system of rack and pinion shiplift

齿轮齿条爬升式升船机驱动系统是由4套驱动机构和1套同步轴系统组成的复杂机械系统,其电机驱动功率须满足其中任意一台电机失效时升船机仍能继续运行的条件。目前的文献中尚无相关计算方法,也缺少相关的试验资料,基于此提出了计算电机功率的逆向路径法、功率平衡法和总效率法,并根据机械传动的基本理论,推导了3种方法的计算公式。运用上述3种方法分别对三峡升船机和向家坝升船机驱动系统的电机功率进行了计算。计算结果表明,这3种方法的计算结果较为接近。研究结果表明,通过比较3种方法的适用性、简便性和计算精度,在驱动系统设备布置已确定的情况下应优先采用功率平衡法,而总效率法可在初步设计阶段中使用。

The driving system in the rack and pinion climbing type shiplift is consists of four driving mechanisms and a synchronous axis system, of which the motor power must satisfy the normal working principle of the shiplift, so that the shiplift can continue to operate if the motor faults occurred in any one of the driving mechanisms. There hasn＇t been method among the open literatures and the test data for motor power calculation. The reverse path method, the power balance method and the total efficiency method for the motor power calculation were put forward and corresponding formulas were derived according to the mechanical transmission theory. The three methods were respectively applied in the driving power calculation of the Three Gorges shiplift and the Xiangjiaba shiplift. The results of the three methods for each shiplift are rather dose. Through synthetically comparison in applicability, simplicity and accuracy of calculation, it is recommended that the power balance method can be preferentially applied when the layout of driving system has been determined,and the total efficiency method can be applied in the primary stage of the design.