摘要
针对抽水蓄能机组在运行过程中出现的振动问题,系统研究了发电机转子不平衡量、导轴承结构参数、机组升速时间及转轮水体质量等关键参数对整机动力学行为的影响。建立整机动力学模型,对其进行模态分析以验证模型准确性,并且通过静力学分析固定部件的应力与应变;最后,分析不同参数对关键部件横向振动的影响。上/下机架模态与静力学分析结果显示,其固有频率高于共振阈值,应力与形变量均符合安全运行标准;谐响应结果表明,减小不平衡量、增大相位差、减小水体质量可以降低横向振幅;瞬态分析表明,不平衡量增加会加剧整机横向振动与应力,形变量与升速时间及水体质量有关,同时应力随转速的增大而增大,并且在额定转速下达到最大值。
Aiming at the vibration problem of pumped storage unit during operation,the influence of key working parameters such as unbalance of generator rotor,structural parameters of guide bearing,unit acceleration time and water mass of runner on the dynamic behavior of the complete machine was systematically studied.With the establishment of the dynamic model of the complete machine,the modal analysis was carried out to verify the accuracy of the model,and the stress and strain of the fixed parts were analyzed by statics analysis.Finally,the influence of different parameters on the lateral vibration of key components was analyzed.Modal and static analyses of the upper/lower frames show that the natural frequencies are higher than the resonance threshold,and the stress and deformation conform to the safe operation standard.Harmonic response results show that the lateral amplitude can be reduced by reducing the unbalance,increasing the phase difference and reducing the water mass.Transient analysis shows that the increase of unbalance will aggravate the lateral vibration and stress of the complete machine,and the deformation is related to the acceleration time and water mass,while with a increase of rotational speed,the stress increases and reaches its maximum value at the rated rotational speed.
作者
黄锦辉
曾辉
万晶宇
叶毫阳
薛聪聪
庞河清
张万福
HUANG Jinhui;ZENG Hui;WAN Jingyu;YE Haoyang;XUE Congcong;PANG Heqing;ZHANG Wanfu(East China Tianhuangping Pumped Storage Power Co.,Ltd.,Anji 313302,Zhejiang Province,China;School of Energy and Power Engineering,Uinversity of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)
出处
《动力工程学报》
北大核心
2025年第11期1833-1843,共11页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(51875361)
国网新源集团有限公司科技资助项目(SGXYKJ-2022-013)。
关键词
抽水蓄能机组
整机
不平衡量
水体质量
导轴承
升速时间
pumped storage unit
complete machine
unbalance
water mass
guide bearing
acceleration time
