空冷风机系统运行时竖向扰力试验研究
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摘要
为了研究直接空冷系统的风机运行时对风机桥架产生的扰力,设计制作了1∶1试验模型,选择3种工况进行试验,运用无线测量技术对风机运行时风机轴的应变及转速进行了测试,通过应变分离技术确定了由转子质量偏心引起的扰力、由扇叶竖向振动引起的弯矩、由驱动风机旋转引起的扭矩、由空气反作用引起的竖向扰力,分析了不同工况、不同转速、不同扇叶数量等条件下四种扰力的特性。试验结果可供从事空冷风机桥架及其支撑结构设计的人员参考。
To research the oscillation forces of fans of a direct air cooling system during operation on the fan bridge truss,1∶ 1 test model was made and three working conditions were selected for the test.The strain and the speed of revolution of the fan shaft in running state were measured by using radio survey techniques.Taking advantage of the strain isolation technique,oscillation forces produced by rotor mass eccentricity,bending moments produced by vertical vibration of the fan blade,torque produced by driving the fan and vertical oscillation forces produced by air reaction were determined.Then four characteristics of oscillation forces in the conditions of different operating modes,different running speeds and different numbers of fan blades were analyzed.The test results give references to the design of air cooling fan bridge trusses and corresponding supporting structures.
To research the oscillation forces of fans of a direct air cooling system during operation on the fan bridge truss,1∶ 1 test model was made and three working conditions were selected for the test.The strain and the speed of revolution of the fan shaft in running state were measured by using radio survey techniques.Taking advantage of the strain isolation technique,oscillation forces produced by rotor mass eccentricity,bending moments produced by vertical vibration of the fan blade,torque produced by driving the fan and vertical oscillation forces produced by air reaction were determined.Then four characteristics of oscillation forces in the conditions of different operating modes,different running speeds and different numbers of fan blades were analyzed.The test results give references to the design of air cooling fan bridge trusses and corresponding supporting structures.
引文
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[14]屈铁军,窦瑞杰,安栋.电厂直接空冷风机系统扰力测试研究[J].地震工程与工程振动,2010,30(4):80-83.QU Tie-jun,DOU Rui-jie,AN Dong.Measurement of disturbing force caused by direct air-cooling fans of power station[J].Journal of Earthquake Engineering and Engineering Vibration,2010,30(4):80-83.
[15]Qu T J,Wang X Y,Xiong Y S.Research on method of vibration analysis of fan bridge truss in operation[C].International Conference on Electric Technology and Civil Engineering.Lushan,2011,2:1472-1476.
[16]Qu T J,Zhao F,Wang X Y.Effect of many air cooling fans in operation on dynamic response of bridge truss[C].The International Conference consumer electronics,communications and Networks,2011,2:1194-1197.
[17]吉林工业大学农机系.第一机械工业部农业机械科学研究院.应变片电测技术[M].北京:机械工业出版社,1978.
[2]肖金平,郭民臣.发电厂直接空冷技术研究现状及展望[J].中国电力教育:2009年管理论丛与技术研究专刊,2009:383-385.XIAO Jin-ping,GUO Min-chen.Research situation and prospect of direct air-cooling technology in power plant[J].China Electric Power Education,2009Management Forum and Technology Research Special Isslle:383-385.
[3]裘顺奕,胡阳.电站空冷技术的现状及应用前景[J].电站辅机,2011,32(4):1-4.QIU Shun-yi,Hu Yang.The present situation and applied prospective of the air cooling technology in power plant[J].Power Station Auxiliary Equipment,2011,32(4):1-4.
[4]朱丽华,白国良,李晓文,等.基于主子系统耦合效应的直接空冷结构体系抗震性能研究[J].土木工程学报,2009,42(2):58-64.ZHU Li-hua,BAI Guo-liang,LI Xiao-wen,et al.Study on the seismic behavior of direct air cooled condenser support platform based on primary-secondary system coupling effect[J].China Civil Engineering Journal,2009,42(2):58-64.
[5]马义伟.发电厂空冷技术的现状与进展[J].电力设备,2006,7(3):5-7.MA Yi-wei.Present status and prospect of utility air cooling technology[J].Electrical Equipment,2006,7(3):5-7.
[6]王忠友,杨志刚.电站直接空冷系统大直径风机振动分析[J].应用能源技术,2007,(1):31-34.WANG Zhong-you,YANG Zhi-gang.Vibration analysis of the full diameter fan for the direct air cooling system of power station[J].Applied Energy Technology,2007(1):31-34.
[7]白国良,朱丽华,赵春莲,等.工作荷载与地震作用下直接空冷结构体系模型试验研究[J].建筑结构学报,2008,29(5):42-49.BAI Guo-liang,ZHU Li-hua,ZHAO Chun-lian,et al.Model test on behavior of direct air cooled condenser support platform under service load and earthquake action[J].Journal of Building Structures,2008,29(5):42-49.
[8]姚泽良,党发宁,白国良,等.大型电厂空冷结构与风机耦合振动响应分析[J].西安理工大学学报,2009,25(4):448-454.YAO Ze-liang,DANG Fa-ning,BAI Guo-liang,et al.An analysis of the couple vibration response to fan-air cooled structure in large thermal power plant[J].Journal of Xi’an University of Technology,2009,25(4):448-454.
[9]彭刚.直接空冷系统风机的振动分析研究[J].应用能源技术,2009(1):31-32.PENG Gang.Structure vibration analysis of acc system fan[J].Applied Energy Technology,2009,(1):31-32.
[10]王勇强,雷平和,田树桐,等.空冷风机桥动力计算[J].电力建设,2011,32(1):12-14.WANG Yong-qiang,LEI Ping-he,TIAN Shu-tong,et al.Dynamic calculation of fan bridge of direct air-cooling system[J].Electric Power Construction.2011,32(1):12-14.
[11]GB50011-2010.建筑抗震设计规范[S].北京:中华人民共和国住房和城乡建设部,2010.
[12]GB50009-2001.建筑结构荷载规范[S].北京:中华人民共和国建设部,2006.
[13]屈铁军,王献云,窦瑞杰,等.直接空冷系统风机运行扰力试验研究[J].土木工程学报,2011,44(sl):71-80.QU Tie-jun,WANG Xian-yun,DOU Rui-jie,et al.Experimental research of oscillation forces of fans in operation of direct air cooling system[J].Journal for Civil Engineering,2011,44(sl):71-80.
[14]屈铁军,窦瑞杰,安栋.电厂直接空冷风机系统扰力测试研究[J].地震工程与工程振动,2010,30(4):80-83.QU Tie-jun,DOU Rui-jie,AN Dong.Measurement of disturbing force caused by direct air-cooling fans of power station[J].Journal of Earthquake Engineering and Engineering Vibration,2010,30(4):80-83.
[15]Qu T J,Wang X Y,Xiong Y S.Research on method of vibration analysis of fan bridge truss in operation[C].International Conference on Electric Technology and Civil Engineering.Lushan,2011,2:1472-1476.
[16]Qu T J,Zhao F,Wang X Y.Effect of many air cooling fans in operation on dynamic response of bridge truss[C].The International Conference consumer electronics,communications and Networks,2011,2:1194-1197.
[17]吉林工业大学农机系.第一机械工业部农业机械科学研究院.应变片电测技术[M].北京:机械工业出版社,1978.
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