【多选题】
汽轮机发生过大的振动时存在哪些危害___
A. 损坏机组零件；
B. 动静部分发生摩擦；
C. C.造成基础松动或周围建筑物损坏
D. D.造成汽缸变形；
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答案
ABC
解析
暂无解析
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汽轮机运行中发生振动，可能的原因有___
A. 主汽温度过低或轴封带水发生水冲击；
B. 汽缸变形、滑销系统卡涩导致动静部分摩擦；
C. 汽轮机组转子弯曲、中心不正或叶片脱落；
D. 油质恶化有杂物、油压过低或油温过高；
【多选题】
运行中给水温度下降的原因有___
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B. 高加换热管发生泄漏；
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由工业冷却水供给密封水或冷却水的设备有___
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D. 润滑油油净化装置真空泵；
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机组正常运行中定期工作涉及的内容大致可分为___几类
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辅机启动前检查项目有___
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【多选题】
凝结水泵气化或漏入空气的现象有___
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【多选题】
热井液位高的原因有___
A. 运行中凝结水再循环、高（低）减温水、低压缸喷水减温未关；
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【多选题】
高压加热器上端差增大，进、出口给水温升减小的原因有___
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【多选题】
汽轮机发生水冲击的原因可能是___
A. 锅炉满水或减温水调整不当，或误开减温水门；
B. 汽包压力急剧下降，造成蒸汽带水；
C. 高、低压加热器及轴封加热器泄漏、疏水不畅；
D. 机组负荷突变；
【多选题】
根据某汽轮机的型号N300——16.7/537/537下列几个信息是正确的___
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