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汽轮机培训课件(凝结水泵解体检修全流程).ppt

  • 2026-08-24 03:31:00
汽轮机培训课件(凝结水泵解体检修全流程).ppt
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结构说明

(1)为使泵具有良好的抗汽蚀性能,该泵首级叶轮采用双吸结构。

(2)采用轴向导叶  在满足性能要求和保证足够的刚度的前提下,减少泵的横向尺寸,从而减少泵组的安装宽度。

(3)泵的轴向力主要由每级叶轮上的平衡孔、平衡腔平衡,剩余轴向力则由泵本身的推力轴承部件承受。该结构的主要优点是:

大大降低了泵组重心,提高了泵的运行稳定性。

在泵组发生轴承故障时,容易分清责任。 

泵与电机采用弹性联轴器连接,安装对中非常方便。 

机械密封及泄水装置拆卸:

拆机械密封,拆凸缘式甩水圈。拆除机械密封密封水进、出水管,从密封盘上拆下管接头。拆下紧固夹紧圈螺栓(M6×12),松开夹紧圈。将机械密封组件与密封腔脱开。装上拉杆,将整个机械密封组件拉出。

拆泄水装置,吊出密封腔,在节流套壳上装上3 只M10 的长螺栓或前端带M10 螺纹的圆棒,整体拉出节流套壳及导轴承。 

泵解体(泵拆卸前、后需将相关零部件做好记号)

吊出泵组:1)拆除有碍于起吊泵的所有接管;2)用两条钢丝绳牢固绑住电机架4个起吊孔,起吊过程中需保证泵组始终竖直不偏斜;3)泵组到达吊装口后,在泵组下部装上一条钢丝绳,用另一组行车吊钩将泵组下部缓慢吊起,泵组上部缓慢放下,将泵组调整到水平状态,再缓慢放到地面指定位置,并保持水平状态。吊泵过程是一个非常重要的安全节点,必须小心谨慎,避免造成严重后果。

1a.拆卸紧固螺栓,将进水喇叭口从双吸涡壳体的接口上拆下。1b.拆叶轮锁紧螺母,然后将首级叶轮从轴上吊出,并整齐地摆放在橡胶地板上。1c.取下首级叶轮键。1d.拆卸双吸涡壳体与第二级泵壳的连接螺栓,水平吊出双吸涡壳体。2a.从轴上拆出轴套定位销、首级和第二级隔离套及轴套。2b.拆除第二级叶轮,整齐地放在橡胶地板上。2c.取下叶轮键及轴套。2d.拆卸第二级泵壳和第三级泵壳的连接螺栓,吊出第二级泵壳。重复执行上面的四个步骤,依次拆除第三级、第四级的叶轮、键、轴套及泵壳。

零部件部件检查

检查推力轴承(泵侧、电机侧)的瓦块,瓦块(推力瓦、导瓦)巴氏合金面必须呈乌泽色,巴氏合金不得有脱落、气孔 、裂纹、凹坑等缺陷。

机械密封解体检查,直观检查动、静密封环有无损伤,密封面上不应有划痕,裂纹等。

泄水装置检查:检查节流套,其表面应光滑无毛刺,其端部均应为直角并呈圆筒形,不应有锥度。

导轴承的检查:导轴承应无破损、裂纹、划痕、偏磨现象。测量各部位导轴承与轴套之间的间隙,若超出最大磨损间隙必须更换。节流衬套与导轴承之间的设计配合间隙:0.12mm~0.24mm,允许最大磨损间隙为0.45mm。其他部位的轴套与导轴承,其设计配合间隙为:0.25mm~0.38mm,允许最大磨损间隙0.55mm。

检查各级的叶轮叶片的磨损情况,检查各级泵壳的耐磨环,用精确的量具测量各个耐磨环的内孔直径和椭圆度。

检查各处轴套的内、外径表面是否有划痕,用精确的量具测量各个轴套的孔径,若衬套呈椭圆形或锥形,则予以更换。

在泵轴上装上各级叶轮,用精确的百分表测量叶轮径向晃动,根据实践经验,首级叶轮的泵侧晃动为≤0.06mm,电机侧晃度≤0.05mm;其他各级叶轮晃动≤0.15mm。

用精确的百分表测量轴各处的弯曲度,根据实践经验,要求轴各处的弯曲度均小于0.03mm。

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  1. CONNECT:[ UseTime:0.001185s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001591s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000736s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000753s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001577s ]
  6. SELECT * FROM `set` [ RunTime:0.000571s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001544s ]
  8. SELECT * FROM `article` WHERE `id` = 526436 LIMIT 1 [ RunTime:0.001376s ]
  9. UPDATE `article` SET `lasttime` = 1787566700 WHERE `id` = 526436 [ RunTime:0.060347s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.019617s ]
  11. SELECT * FROM `article` WHERE `id` < 526436 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001238s ]
  12. SELECT * FROM `article` WHERE `id` > 526436 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001346s ]
  13. SELECT * FROM `article` WHERE `id` < 526436 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001664s ]
  14. SELECT * FROM `article` WHERE `id` < 526436 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.177293s ]
  15. SELECT * FROM `article` WHERE `id` < 526436 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.085804s ]
0.520244s