1000MW超超临界汽轮机润滑油系统优化研究

摘要

汽轮机组不设置独立主油泵且电气接线方式薄弱,导致事故情况下润滑油系统对直流油泵的依赖性更强.一旦发生异常事件,直流油泵不能及时正确地启动,将直接导致汽轮机组断轴烧瓦的重大设备损坏事故.通过油泵的启动试验对比分析,完成润滑油的电气及联锁控制回路改造,解决了直流油泵启动中存在的隐患,降低了润滑油系统导致断轴烧瓦事故发生的可能性,对同类型机组起到一定的参考作用.%The lubricating oil system of the turbine generator unit relies on the DC oil pump significantly in case of turbine unit accidents,if it is not equipped with an independent main oil pump and its electrical connection is weak Once an abnormal event occurs,the DC oil pump cannot be started in time,which will directly lead to the severe accidents of steam turbine shaft break and bearing pad overheated damage.Based on the comparative analysis of the pump starting up test,the upgrade on the electrical and interlock circuit of the lubricating oil system is carried out.Thus the potential risks in the DC oil pump starting process are solved,and the risks of shaft break and bearing pad overheating are lowered.The study results are helpful for the steam turbines of the same type.