船用离心泵状态监测
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摘要
实现机舱设备实时状态监测及评估是智能船舶以及无人机舱发展过程中的重要部分,也是事后维修、定期维修向视情维修转变过程的关键技术。本文利用最小二乘多项式拟合法对实验数据进行拟合,得到离心泵Q-H特性曲线拟合多项式。在某一进出口压差下,比较拟合流量和监测流量之间的差值来表征离心泵实时性能状态,并通过设置不同程度的泄露故障验证该方法的有效性。相比于用CFD软件建模仿真以及监测振动等方法,该方法可行性强、简单实用、成本较低,具有重要的实际工程应用价值。
It is an important part of the development of intelligent ship and unmanned engine room to realize the real time condition monitoring and evaluation of the engine room equipment. It is also the key technology to change periodical maintenance and breakdown maintenance to condition maintenance. The method of least square polynomial fitting is used to fit the experimental data, and the Q-H characteristic curve fitting polynomial of the centrifugal pump is obtained. In a certain difference of import and export pressure, comparing the fit flow and the monitoring flow to characterize the real time performance of the centrifugal pump. And setting the different levels of leakage failure to verify the effectiveness of the method.Compared with the method of modeling and simulation by CFD software and vibration monitoring, the method is feasible,simple, practical, low cost and has important practical engineering application value.
It is an important part of the development of intelligent ship and unmanned engine room to realize the real time condition monitoring and evaluation of the engine room equipment. It is also the key technology to change periodical maintenance and breakdown maintenance to condition maintenance. The method of least square polynomial fitting is used to fit the experimental data, and the Q-H characteristic curve fitting polynomial of the centrifugal pump is obtained. In a certain difference of import and export pressure, comparing the fit flow and the monitoring flow to characterize the real time performance of the centrifugal pump. And setting the different levels of leakage failure to verify the effectiveness of the method.Compared with the method of modeling and simulation by CFD software and vibration monitoring, the method is feasible,simple, practical, low cost and has important practical engineering application value.
引文
[1]吴仁荣.船用离心泵的发展概况[J].舰船科学技术,1981,13(12):1–10.WU Ren-rong.Development of marine centrifugal pump[J].Ship Science and Technology,1981,13(12):1–10.
[2]印洪浩,彭中波.船用离心泵故障SOM网络诊断方法[J].中国航海,2012,(2):24–28.YIN Hong-hao,PENG Zhong-bo.Fault diagnosis of marine centrifugal pump with the SOM network[J].Navigation of China,2012,(2):24–28.
[3]冉军.基于神经网络的离心泵性能预测研究与实现[D].成都,电子科技大学,2014.
[4]王秀勇,王灿星.基于数值模拟的离心泵性能预测[J].流体机械,2007,(10):9–13.WANG Xiu-yong,WANG Can-xing.Performance prediction of centrifugal pump based on the method of numerical simulation[J].Fluid Machinery,2007,(10):9–13.
[5]丁晓霞.多级离心泵的性能预测及结构优化[D].上海:华东理工大学,2013.
[6]邹乐强.最小二乘法原理及其简单应用[J].科技信息,2010,(23):282–283.ZOU Le-qiang.Principle of least square method and its simple application[J].Science and Technology Information,2010,(23):282–283.
[7]陈文毅.泵特性曲线的拟合方法[J].舰船科学技术,1995,17(4):66–69.CHEN Wen-yi.Fitting method of pump characteristic curve[J].Ship Science and Technology,1995,17(4):66–69.
[8]宋生奎,石永春,王朝晖.离心泵性能曲线的两种快速拟合法[J].流体机械,1999,(9):40–42+59.SONG Sheng-kui,SHI Yong-chun,WANG Zhao-hui.Two kinds of fast fitting method for performance curve of centrifugal pump[J].Fluid Machinery,1999,(9):40–42,59.
[9]陈海泉,等.船舶辅机[M].大连:大连海事大学出版社,2010.
[2]印洪浩,彭中波.船用离心泵故障SOM网络诊断方法[J].中国航海,2012,(2):24–28.YIN Hong-hao,PENG Zhong-bo.Fault diagnosis of marine centrifugal pump with the SOM network[J].Navigation of China,2012,(2):24–28.
[3]冉军.基于神经网络的离心泵性能预测研究与实现[D].成都,电子科技大学,2014.
[4]王秀勇,王灿星.基于数值模拟的离心泵性能预测[J].流体机械,2007,(10):9–13.WANG Xiu-yong,WANG Can-xing.Performance prediction of centrifugal pump based on the method of numerical simulation[J].Fluid Machinery,2007,(10):9–13.
[5]丁晓霞.多级离心泵的性能预测及结构优化[D].上海:华东理工大学,2013.
[6]邹乐强.最小二乘法原理及其简单应用[J].科技信息,2010,(23):282–283.ZOU Le-qiang.Principle of least square method and its simple application[J].Science and Technology Information,2010,(23):282–283.
[7]陈文毅.泵特性曲线的拟合方法[J].舰船科学技术,1995,17(4):66–69.CHEN Wen-yi.Fitting method of pump characteristic curve[J].Ship Science and Technology,1995,17(4):66–69.
[8]宋生奎,石永春,王朝晖.离心泵性能曲线的两种快速拟合法[J].流体机械,1999,(9):40–42+59.SONG Sheng-kui,SHI Yong-chun,WANG Zhao-hui.Two kinds of fast fitting method for performance curve of centrifugal pump[J].Fluid Machinery,1999,(9):40–42,59.
[9]陈海泉,等.船舶辅机[M].大连:大连海事大学出版社,2010.