隔膜泵故障检修及分析

德国ABEL公司的HMD-G-32-0250型隔膜泵是板框污泥脱水系统中的关键设备之一。针对A-BEL隔膜泵运行中频繁振动损坏的问题。运用现代控制技术分析了其主要原因是因泵转速过快造成、而转速过快又是由于PLC控制程序存在缺陷所造成的。PIE控制程序使隔膜泵压力在1．0-L3MPa时．变频器输出频率维持在40Hz的振动区域。通过修改控制程序模块，使压力在0．75-1．4MPa的区间内，变频器输出频率从80Hz线性下降到8Hz直至停止。修改后消除了泵及管道的震动，泵运行正常。

Failure Inspection and Analysis for Diaphragm Pump

The ABEL diaphragm pumps HMD-G-32-0250 is one of the key equipments in the Chamber Filter Press Sludge Dewatering System. A modem control technology was used to analyze the reason for easy broken. The result showed that the pump rotary speed was too fast, which caused by a bug in the PLC program, may damage the pump. In the old version of the PLC program, when the outlet pressure of the diaphragm pumps attained and maintained 1.0-1.3 MPa, the outlet frequency of the frequency transfer vibrated around 40Hz. In the revised version, while the outlet pressure of pumps increases from 0.75 MPa to 1.4 MPa, the outlet frequency of the transfer decreases linearly from 80 Hz to 8 Hz, until stop. After the PLC program was revised, the pumps run well, and the vibration of the pumps and pipes are eliminated.