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汽轮机轴承损坏的危害、现象、原因及处理

2024-01-15

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一、汽轮机轴承损坏的危害有哪些?

造成轴颈损坏,严重时发生动静摩擦导致汽轮机损坏。

二、汽轮机轴承损坏的现象是什么?

(1) 轴承钨金温度明显升高或轴承冒烟。

(2) 推力轴承损坏时,推力瓦块金属温度升高。

(3) 回油中发现钨金碎末。

(4) 汽轮机振动增加。

三、汽轮机轴承损坏有哪些原因?

(1) 轴承断油或润滑油量偏小。

(2) 油压偏低油温偏高或油质不合格。

(3) 轴承过载或推力轴承超负荷,盘车时顶轴油压低或未顶起。

(4) 轴承间隙、紧力过大或过小。

(5) 汽轮机进水或发生水击。

(6) 长期振动偏大造成轴瓦损坏。

(7) 交、直流油泵联锁不正常,有关联锁、保护定值不正确,造成事故时供油不正常。

四、汽轮机轴承损坏如何处理?

(1) 运行中发现轴承损坏应立即紧急故障停机。

(2) 因轴承损坏停机后盘车不能投入运行不应强制盘车,应采取可靠的隔离措施,防止汽缸进水或冷汽。

(3) 轴承损坏后应彻底清理油系统,确保油质合格方可重新启动。

五、防止汽轮机轴承损坏的预控措施?

(1) 加强油温、油压的监视调整,严密监视轴承钨金温度及回油温度,发现异常应及时查找原因并消除。

(2) 油系统设备自动及备用可靠,并进行严格的定期试验。运行中油泵或冷油器的投、停切换应平稳谨慎,严防断油烧瓦。

(3) 油净化装置运行正常,油质应符合标准。

(4) 防止汽轮机进水、大轴弯曲、轴承振动及通流部分损坏。

(5) 汽轮发电机转子应可靠接地。

(6) 启动前应认真按设计要求整定交、直流油泵的联锁定值,检查接线正确。

(来源:网络)