高压永磁电机在双向竖井贯流泵站的应用分析

Analysis on Application of High-Voltage Permanent Magnet Motor in Bidirectional Shaft Tubular Pumping Station

摘要:

竖井贯流泵近年来因结构可靠、流道损失小、开挖深度小等特点而被广泛应用于多座大中型低扬程泵站。但因竖井内一般设置有高速电机、齿轮箱及轴承箱，设备数量多，空间局促，噪声叠加，特别是单泵10 m³/s左右流量稍小的竖井贯流泵，因竖井比例大而导致竖井侧进水口的宽高比大，对水流流态不利。为使竖井贯流泵具有更好的适应性，以南新泾泵闸竖井贯流泵为例，在对比了电机能耗、泵房尺寸、双向调速、出口闸门速度、噪声方面的优劣后，采用低速永磁电机配套变频器替代原高速电机配套齿轮箱减速。并通过分析水泵机组的运行过程和故障成因，对高压永磁电机进行状态监测、故障诊断和状态趋势预测，实现智慧化运维管理。

Abstract:

Due to its reliable structure, small flow channel head loss and small excavation depth, the shaft tubular pumps have been widely used in many large-sized and medium-sized low-head pumping stations in recent years. There are generally high-speed motor, gear box and bearing box in the shaft. The number of equipment is large, the space is limited and the noise is superimposed, especially for the shaft tubular pumps with a single pump flow rate of around 10 m3/s and a slightly smaller flow rate. Due to the large proportion of the shaft, the width-to-height ratio of the water inlet on the side of the shaft is large, which is unfavorable for the flow pattern of the water. In order to make the shaft tubular pump have better adaptability, taking the shaft tubular pumps of Nanxinjing Pump Gate as an example, after the comparison of the advantages and disadvantages of motor energy consumption, pump room size, bidirectional speed regulation, outlet gate speed and noise, the low-speed permanent magnet motor with frequency converter is used to replace the high-speed motor with gear box for deceleration. By analyzing the operation process and fault causes of the pump unit, the condition monitoring, fault diagnosis and condition trend prediction for high-voltage permanent magnet motors are conducted to realize the intelligent operation and maintenance management.