基于并联交错的起重机械节能装置设计研究

Design and Research of Energy Saving Device for Hoisting Machinery Based on Parallel Interleaving

进行了起重机械起升机构运行特性的分析,分析了起重机械起升重物和下降重物过程的能量流动及其效能变化。由起重机械效能分析可知,消耗在制动电阻上的能量为总量的30%~64%。如果可以将这部分能量利用起来,则可以极大提升起重机械的总体效率。研究了一种电气节能装置,该装置将起重机械消耗在制动电阻上的能量通过超级电容所构成的储能系统储存起来,在起重机械下一次提升重物的时候,优先从储能系统抽取能量,能量不足再从电网抽取能量。该研究降低了实际从电网抽取使用的电量,达到了节能降耗的目的。

The operating characteristics of the hoisting mechanism of the hoisting machinery were analyzed, the energy flow and the change of the efficiency of the hoisting machinery lifting heavy objects and descending heavy objects were analyzed. It can be seen from the analysis of the efficiency of the hoisting machinery that the energy consumed on the braking resistor is about 30% to 64% of the total amount. If this part of the energy can be used, the overall efficiency of the lifting machine can be greatly improved. An electrical energy-saving device was studied. The device stores the energy consumed by the crane on the braking resistance through the energy storage system composed of super capacitor. When the crane lifts the heavy object next time, it takes priority to extract energy from the energy storage system, and then extracts energy from the electric network when the energy is insufficient. This research reduces the actual electricity extracted from the grid, and achieves the purpose of energy saving and consumption reduction.