大型液压全调节立式轴流泵叶片调节机构故障分析与改造  

Failure Analysis and Transformation of the Blade Adjusting Mechanism of Large Hydraulic Full Regulation Vertical Axial-flow Pumps

作　　者：李扬[1] 夏方坤 周灿华[1] 缪薇[1] 陆明浩 LI Yang;XIA Fang-kun;ZHOU Can-hua;MIAO Wei;LU Ming-hao(Jiangdu Water Management Division of Jiangsu Province,Yangzhou 225200,Jangsu Province,China)

机构地区：[1]江苏省江都水利工程管理处,江苏扬州225200

出　　处：《中国农村水利水电》2022年第1期98-104,共7页China Rural Water and Hydropower

摘　　要：江都第四抽水站采用BYKD型油压式叶片全调节装置,曾多次产生渗漏油、烧损轴瓦及蓄能器皮囊老化等问题。南水北调大流量输水满负荷运行工况,不具备停机检修条件,为此设计降压运行应急方案,减少漏油量,延长补油间隔,保障主机运行。为从结构上解决外置式供油系统集中供油方式带来的油路复杂,管路接头量大,漏油点多,烧损轴瓦等隐患。设计实施内置式叶片调节机构改造,将下置式活塞改为上置式,通过对比计算活塞调节力、调节杆拉力及连接螺栓拉力,明确改造要点。该方案将微型电机、微型齿轮油泵以及油缸集成于叶调机构内,简化叶调系统结构,油路独立,增强了密封性能,提高了叶调机构的可靠性。The fourth Jiangdu Pumping Station adopts BYKD type hydraulic blade full regulating device,which has caused many problems,such as oil leakage,burning bearing bush and the aging of accumulator skin.The South-to-North Water Diversion Project is under the condition of full load operation with large flow water delivery,and it does not have the conditions for shutdown and maintenance.Therefore,the emergency scheme for depressurization operation is designed to reduce the amount of oil leakage,extend the interval of oil replenishment,and ensure the operation of main engine.In order to solve the problems of complex oil circuit,large amount of pipeline joints,many oil leakage points and burning of bearing bush caused by centralized oil supply mode of external oil supply system.The transformation of built-in blade adjusting mechanism is designed and implemented,the lower piston into the upper one is changed through the comparison and calculation of piston adjusting force,adjusting rod tension and connecting bolt tension,the transformation points are made clear.In this scheme,micro motor,micro gear oil pump and oil cylinder are integrated into the blade adjusting mechanism,which simplifies the structure of the blade adjusting system,makes the oil circuit independent,enhances the sealing performance and improves the reliability of the blade adjusting mechanism.

关 键 词：液压 叶片调节机构 降压运行 内置式 轴流泵 

分 类 号：TV675[水利工程—水利水电工程]