基于盲源分离的往复泵液力端故障机理

发布时间：2019-06-15 19:14

【摘要】：往复泵在石油石化行业应用十分广泛,常常在高压环境下输送大密度、高黏度以及高含砂量的液体。泵阀是往复泵液力端最易损坏的部件之一,它的运行状态能直接影响着往复泵的容积效率和工作可靠性。本文针对BW-250型往复泵液力端泵阀弹簧断裂、阀盘磨损和活塞磨损这三类故障进行失效分析,通过在泵阀上安装加速度和位移传感器对泵阀状态进行实时监测,并对阀内外测得的振动信号进行量化对比分析,采用盲源分离技术提取故障特征信号。结果表明,BW-250型往复泵液力端活塞磨损的加剧导致泵阀吸入和排出压力不稳定,进而导致阀盘和弹簧故障的加剧,初步揭示了BW-250型往复泵液力端关键部件故障萌生和演化、发展的特点和规律,这对于往复泵液力端故障机理研究工作的进一步推进,提高易损件使用寿命具有重要意义。
[Abstract]:Reciprocating pump is widely used in petroleum and petrochemical industry. It often conveys liquid with high density, high viscosity and high sand content in high pressure environment. Pump valve is one of the most easily damaged components at the hydraulic end of reciprocating pump. Its running state can directly affect the volume efficiency and working reliability of reciprocating pump. In this paper, the failure analysis of BW- 250 reciprocating pump valve spring fracture, disc wear and piston wear is carried out. The state of pump valve is monitored in real time by installing acceleration and displacement sensors on the pump valve, and the vibration signals measured inside and outside the valve are quantitatively compared and analyzed, and the fault characteristic signal is extracted by blind source separation technology. The results show that the aggravation of piston wear at the hydraulic end of BW- 250 reciprocating pump leads to unstable suction and discharge pressure of pump valve, which leads to the aggravation of valve disc and spring faults. The characteristics and laws of fault initiation, evolution and development of key components at hydraulic end of BW- 250 reciprocating pump are preliminarily revealed, which is of great significance for further research on fault mechanism of hydraulic end of reciprocating pump and for improving the service life of vulnerable parts.
【作者单位】：常州大学机械工程学院;
【基金】：国家自然科学基金项目(51175051)
【分类号】：TH38;TN911.7

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