火电厂汽轮机振动故障研究毕业论文设计资料.doc

火电厂汽轮机振动故障研究毕业论文设计 毕 业 设 计论文 说 明 书 题 目火电厂汽轮机振动故障研究 摘 要 对转动机械来说微小的振动是不可避免的振动幅度不超过规定标准的属于正常振动这里所说的振动系指机组转动中振幅比原有水平增大特别是增大到超过允许标准的振动也就是异常振动任何一种异常振动都潜伏着设备损坏的危险强烈振动又会导致机组其他零部件松动甚至损坏加剧动静部分摩擦形成恶性循环加剧设备损坏程度异常振动是汽轮发电机运转中缺陷隐患的综合反映是发生故障的信号因此新安装或检修后的机组必须经过试运行测试各轴承振动及各轴承处轴振在合格标准以下方可将机组投入运行振动超标的则必须查找原因采取措施将振动降到合格范围内才能移交生产或投入正常运行汽轮机组担负着火力发电企业发电任务的重点由于其运行时间长关键部位长期磨损等原因汽轮机组故障时常出现这严重影响了发电机组的正常运行汽轮机组异常振动是汽轮机常见故障中较为复杂的一种故障由于机组的振动往往受多方面的影响只要跟机本体有关的任何一个设备或介质都会是机组振动的原因比如进汽参数疏水油温油质等等因此针对汽轮机异常震动原因的分析就显得尤为重要只有查明原因才能对症维修针对导致汽轮机异常振动的各个原因分析是维修汽轮机异常振动的关键 影响因素Turning it on tiny mechanical vibration is inevitable vibration amplitude do not exceed the specified standard belongs to the normal vibration Here said the vibration refers to the unit in rotation than original levels increase amplitude especially increases to more than allow standard vibration and is abnormal vibration Any kind of abnormal vibration the damage of equipment are hidden danger Strong vibration and can cause other crew components loose even damaged aggravate action part friction form vicious circle aggravate equipment damage Abnormal vibration of steam turbine generator running is the comprehensive reflection of defects hidden trouble is the failure of the signal Therefore new installation or maintenance of units must pass after trial run testing all bearing vibration and each bearing vibration in shaft in qualified standard party to the unit under in operation Vibration exceeds the then must find reason and take measures will vibration to qualified range production or investment can be handed over a normal operationIn recent decades the relevant domestic unit to handle of vibration fault the history and experience and lessons and explain the qualitative vibration fault is not difficult but in general the concrete reason to determine the fault when malfunction because of the mechanism analysis differences makes misjudgment occur frequently Therefore of vibration fault diagnosis in addition to ne