【摘要】 由于部件的磨损、工作油液的污染和杂物的侵入可能导致调节系统中摩擦与间隙增大 ,系统发生极限环振荡。当摩擦阻力增大到一定程度时 ,可能发生卡涩 ,严重威胁机组的安全。本文从时域响应和频谱分析两个方面对汽轮机调节系统中存在摩擦与间隙时的响应特性进行了研究 ,给出了摩擦与间隙响应的特征 ,可以用于系统的状态监测与故障诊断更多还原

【Abstract】 Due to component wear, working oil related pollution and ingress of foreign matter there may emerge cases of friction and an enlarged clearance in the governing system of a steam turbine. The foregoing can lead to a system limit ring oscillation. When the friction resistance increased to a certain degree, seizure of moving parts may take place, posing a serious threat to the safety of the turbine unit. From the perspective of time domain response and the analysis of frequency spectrum the authors have studied the response characteristics of the steam turbine governing system in the presence of friction and clearance. With the response characteristics of the friction and clearance being identified the present paper can serve some useful purpose for system status monitoring and failure diagnosis.更多还原