300MW发电电动机组推力轴承及其冷却系统特性
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摘要
本文介绍了300MW发电电动机组推力轴承及其外循环冷却系统特性。计算了推力轴承润滑性能,并分析了导瓦泵外循环系统。在泵瓦滑动表面开有"自吸"泵槽,机组转动时滑转子将油吸入瓦块的泵槽,并通过导瓦的出油孔流向集油环管。热油经外面的油冷却器冷却。导瓦泵外循环冷却系统可靠性高,损耗小,噪音小。冷却器的换热容量对瓦温有重要影响。增加冷却器的换热容量,可有效降低油温,进而降低推力轴承瓦的温度。新型的导瓦泵技术结构紧凑,可靠性高,适用在高转速和高PV值等机组推广。
Characteristics of external circulation cooling system of thrust bearing for a 300 MW generator-motor is presented in this paper. There are gaps on the sliding surface of the pumping pad,and the sliding rotor draws the oil into the gaps due to the rotating of the unit. The lubricating oil is cooled by an external oil-water cooler. The advantages of the new system are improved operating reliability and reduced losses and noise. The cooler capacity has an important influence on the pad temperature. Increased cooler capacity has effectively reduced the oil temperature, thereby reducing the thrust bearing pad temperature. New self pumping pads technology has compact structure, high reliability and is suitable for application on units with high speed and high PV value.
Characteristics of external circulation cooling system of thrust bearing for a 300 MW generator-motor is presented in this paper. There are gaps on the sliding surface of the pumping pad,and the sliding rotor draws the oil into the gaps due to the rotating of the unit. The lubricating oil is cooled by an external oil-water cooler. The advantages of the new system are improved operating reliability and reduced losses and noise. The cooler capacity has an important influence on the pad temperature. Increased cooler capacity has effectively reduced the oil temperature, thereby reducing the thrust bearing pad temperature. New self pumping pads technology has compact structure, high reliability and is suitable for application on units with high speed and high PV value.
引文
[1]武中德,张宏.水轮发电机组推力轴承技术的发展[M].电器工业, 2007(1):32-36.
[2]武中德,张宏.大型水轮发电机推力轴承设计[C]//中国水电设备学术讨论会, 2009.
[3]武中德.大型水轮发电机推力轴承冷却系统参数[J].大电机技术, 2016(7):81-82.
[4]杨开黎,罗建华.蒲石河抽水蓄能电站发电电动机推力轴承设计[J].大电机技术, 2012(5):22-26.
[5]武中德,吴军令,张宏,王建刚,刘平安.抽蓄机组单波纹弹性油箱支撑双向推力轴承特性研究及应用[J].水电与抽水蓄能, 2017(6):12-16.
[6]罗建华.蒲石河电站上导轴承温度偏高分析与处理[J].上海大中型电机, 2016(1):50-52.
[7]张宏,武中德,吴军令.深圳蓄能机组双向推力轴承试验研究[J].大电机技术, 2015(7):116-119.
[8] Schafer D, Fuerst A, Shen L, et al. Investigations into a 6000 tons thrust bearing with Teflon or Babbitt layer for the Three Gorges units[C]//International Conference on Electrical Machines and Systems. IEEE, 2001:131-136.
[9]吴军令,武中德,范寿孝,张培良.溧阳蓄能机组推力轴承试验研究[J].大电机技术,2014(1):41-44.
[10] Sun Y S Y, Wu Z W Z, Wu J W J. Test study for bi-directional thrust bearing[C]//Eurocon, Eurocon09 IEEE. IEEE, 2009.
[11]林英伟,张宏,童旭松,武中德.抽水蓄能机组推力轴承性能分析[J].大电机技术, 2008(7):53-55.
[12]武中德,吴军令.双向推力轴承设计及热弹流润滑性能分析[J].大电机技术, 2010(6):26-28.
[13]黄滨,吴军令,武中德,等.水泵水轮机双向推力轴承三维热弹流动力润滑性能分析[C]//全国青年摩擦学与表面工程学术会议, 2011.
[14] Huang B, Wu Z D, Wu J L, et al. Numerical and experimental research of bidirectional thrust bearings used in pump-turbines[C]//ARCHIVE Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology1994-1996, 2012, 226(9):795-806.
[15]刘平安,武中德.三峡右岸发电机推力轴承外循环冷却技术[J].大电机技术, 2008(1):7-9.
[16]魏力,章存建,高从闯,等.溧蓄推力轴承外循环系统噪声和振动问题分析与处理[J].大电机技术,2017(6):22-24.
[17]李明宇,武中德,吴军令.大型水轮发电机推力轴承外加泵外循环冷却技术[J].大电机技术,2014(5):18-19.
[18]王书枫,王艳武.溧阳抽水蓄能电站发电电动机推力及下导轴承外循环冷却系统设计[J].大电机技术, 2016(1):13-15.
[19]王俊,王秋杨,洪旭刚.自泵型导轴承外循环冷却系统应用[J].大电机技术, 2014(4):38-40.
[20] Bouyer J, Fillon M. Experimental measurement of the friction torque on hydrodynamic plain journal bearings during start-up[J]. Tribology International,2011, 44(7-8):772-781.
[21] P Pajaczkowski. Simulation of transient states in large hydrodynamic thrust bearings[D]. Gdaosk University of Technology, 2010:30.
[2]武中德,张宏.大型水轮发电机推力轴承设计[C]//中国水电设备学术讨论会, 2009.
[3]武中德.大型水轮发电机推力轴承冷却系统参数[J].大电机技术, 2016(7):81-82.
[4]杨开黎,罗建华.蒲石河抽水蓄能电站发电电动机推力轴承设计[J].大电机技术, 2012(5):22-26.
[5]武中德,吴军令,张宏,王建刚,刘平安.抽蓄机组单波纹弹性油箱支撑双向推力轴承特性研究及应用[J].水电与抽水蓄能, 2017(6):12-16.
[6]罗建华.蒲石河电站上导轴承温度偏高分析与处理[J].上海大中型电机, 2016(1):50-52.
[7]张宏,武中德,吴军令.深圳蓄能机组双向推力轴承试验研究[J].大电机技术, 2015(7):116-119.
[8] Schafer D, Fuerst A, Shen L, et al. Investigations into a 6000 tons thrust bearing with Teflon or Babbitt layer for the Three Gorges units[C]//International Conference on Electrical Machines and Systems. IEEE, 2001:131-136.
[9]吴军令,武中德,范寿孝,张培良.溧阳蓄能机组推力轴承试验研究[J].大电机技术,2014(1):41-44.
[10] Sun Y S Y, Wu Z W Z, Wu J W J. Test study for bi-directional thrust bearing[C]//Eurocon, Eurocon09 IEEE. IEEE, 2009.
[11]林英伟,张宏,童旭松,武中德.抽水蓄能机组推力轴承性能分析[J].大电机技术, 2008(7):53-55.
[12]武中德,吴军令.双向推力轴承设计及热弹流润滑性能分析[J].大电机技术, 2010(6):26-28.
[13]黄滨,吴军令,武中德,等.水泵水轮机双向推力轴承三维热弹流动力润滑性能分析[C]//全国青年摩擦学与表面工程学术会议, 2011.
[14] Huang B, Wu Z D, Wu J L, et al. Numerical and experimental research of bidirectional thrust bearings used in pump-turbines[C]//ARCHIVE Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology1994-1996, 2012, 226(9):795-806.
[15]刘平安,武中德.三峡右岸发电机推力轴承外循环冷却技术[J].大电机技术, 2008(1):7-9.
[16]魏力,章存建,高从闯,等.溧蓄推力轴承外循环系统噪声和振动问题分析与处理[J].大电机技术,2017(6):22-24.
[17]李明宇,武中德,吴军令.大型水轮发电机推力轴承外加泵外循环冷却技术[J].大电机技术,2014(5):18-19.
[18]王书枫,王艳武.溧阳抽水蓄能电站发电电动机推力及下导轴承外循环冷却系统设计[J].大电机技术, 2016(1):13-15.
[19]王俊,王秋杨,洪旭刚.自泵型导轴承外循环冷却系统应用[J].大电机技术, 2014(4):38-40.
[20] Bouyer J, Fillon M. Experimental measurement of the friction torque on hydrodynamic plain journal bearings during start-up[J]. Tribology International,2011, 44(7-8):772-781.
[21] P Pajaczkowski. Simulation of transient states in large hydrodynamic thrust bearings[D]. Gdaosk University of Technology, 2010:30.